ABOUT THIS PROSPECTUS

This prospectus is part of a registration statement on Form S-3 under the Securities Act of 1933, as amended (the “Securities Act”), that we filed with the Securities and Exchange Commission or(the “SEC”), using the SEC, using a “shelf” registration or continuous offering process. Under this shelf registration process, wethe Selling Stockholders may from time to time,offer and sell any combinationthe shares of the securitiesour common stock described in this prospectus in one or more offerings up to a total aggregate offering price of $50,000,000.

Thisofferings. Any accompanying prospectus provides a general description of the securities we may offer. We may provide specific terms of securities to be offered in onesupplement or more supplements to this prospectus. We may also provide a specific plan of distribution for any securities to be offered in arelated free writing prospectus supplement. Prospectus supplements may also add, update, or change information contained in this prospectus or in any documents incorporated by reference into this prospectus. If the information varies between this prospectus and the accompanying prospectus supplement, you should rely on the information in the accompanying prospectus supplement.

Before purchasing any securities, you You should carefully read both this prospectus, any accompanying prospectus supplement, and any related free writing prospectus, supplement, together with the additional information incorporated herein by reference as described under the heading “Information We Incorporateheadings “Where You Can Find More Information” and “Incorporation by Reference.Reference” before investing in the common stock offered hereby.

You should rely only on the information contained in or incorporated by reference ininto this prospectus, any accompanying prospectus supplement, and any applicable free writing prospectus prepared by or on behalf of us or to which we have referred you.prospectus. Neither we nor any underwritersthe Selling Stockholders have authorized any other personanyone to provide you with different information. If anyone provides you with different or inconsistent information, you should not rely on it. We and the Selling Stockholders take no responsibility for, and can provide no assurance as to the reliability of, any other information that others may give you. Neither we nor the Selling Stockholders are making an offer of these securities in any jurisdiction where the offer is not permitted. You should not assume that the information contained in this prospectus, any prospectus supplement, or any applicable free writing prospectus, is accurate only as ofor the date on its respective cover, and that any informationdocuments incorporated by reference, is accurate only as of any date other than the datedates of those documents regardless of the documenttime of delivery of this prospectus or prospectus supplement or any sale of the Resale Shares. Since the respective dates of this prospectus and the documents incorporated by reference unless we indicate otherwise. Ourinto this prospectus, our business, financial condition, results of operations, and prospects may have changed since those dates. Thischanged.

For investors outside the United States, neither we nor the Selling Stockholders have done anything that would permit this offering, or possession or distribution of this prospectus, contains summariesany prospectus supplement or free writing prospectus, in any jurisdiction where action for that purpose is required other than in the United States. Persons outside the United States who come into possession of certain provisions contained in somethis prospectus, any applicable prospectus supplement, or free writing prospectus must inform themselves about, and observe any restrictions relating to, the offering of the documents described herein, but reference is made toResale Shares and the actual documents for complete information. Alldistribution of this prospectus outside of the summaries are qualifiedUnited States.

Unless otherwise stated or the context requires otherwise, when we refer to “Sonim,” “we,” “our,” “us,” and the “Company” in their entirety bythis prospectus, we mean Sonim Technologies, Inc., and its consolidated subsidiaries. When we refer to “you,” we mean the actual documents. Copies of somepotential holders of the documents referredapplicable series of securities.

All references to herein have been filed, will be filed or will be“this prospectus” refer to this prospectus and any applicable prospectus supplement, including the documents incorporated by reference herein and therein, unless the context otherwise requires.

Solely for convenience, tradenames referred to in this prospectus appear without the ® and ™ symbols, but those references are not intended to indicate, in any way, that we will not assert, to the fullest extent under applicable law, our rights, or that the applicable owner will not assert its rights, to these tradenames.

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

This prospectus and the documents incorporated by reference herein contain forward-looking statements that involve substantial risks and uncertainties. All statements, other than statements of historical facts, included in this prospectus or the documents incorporated herein by reference regarding our strategy, future operations, future financial position, future revenues, projected costs, prospects, plans, and objectives of management are forward-looking statements. The words “anticipate,” “believe,” “estimate,” “expect,” “intend,” “may,” “plan,” “predict,” “project,” “will,” “would,” “could,” “should,” “potential,” “seek,” “evaluate,” “pursue,” “continue,” “design,” “impact,” “affect,” “forecast,” “target,” “outlook,” “initiative,” “objective,” “designed,” “priorities,” “goal,” or the negative of such terms and similar expressions are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words. Those statements appear in this prospectus, any accompanying prospectus supplement, and the documents incorporated herein and therein by reference, particularly in the sections titled “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and include statements regarding the intent, belief or current expectations of our management that are subject to known and unknown risks, uncertainties and assumptions. The forward-looking statements in this prospectus and the documents incorporated herein by reference may include but are not limited to the statements about:

We have based these forward-looking statements largely on our current expectations and projections about future events and trends that we believe may affect our financial condition, operating results, business strategy, short-term and long-term business operations and objectives, and financial needs. These forward-looking statements are subject to a number of risks, uncertainties, and assumptions, including the following:

Moreover, we operate in a very competitive and rapidly changing environment. New risks emerge from time to time. It is not possible for our management to predict all risks, nor can we assess the impact of all factors on our business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements we may make. In light of these risks, uncertainties, and assumptions, the future events and trends discussed in this prospectus, any accompanying prospectus supplement and the documents incorporated by reference herein may not occur and actual results could differ materially and adversely from those anticipated or implied in the forward-looking statements.

Because forward-looking statements are inherently subject to risks and uncertainties, some of which cannot be predicted or quantified, you should not rely upon forward-looking statements as predictions of future events. The events and circumstances reflected in the forward-looking statements may not be achieved or occur and actual results could differ materially from those projected in the forward-looking statements. You should read this prospectus and the documents that we incorporate by reference herein completely and with the understanding that our actual future results may be materially different from what we expect. Except as required by applicable law, we undertake no obligation to update publicly any forward-looking statements for any reason after the date of this prospectus, any prospectus supplement, and the other documents we have filed with the SEC that are incorporated herein by reference to conform such statements to actual results or to changes in our expectations.

RISK FACTORS

An investment in our securities involves a high degree of risk. Before you decide to invest in our securities, you should carefully consider the risks discussed under the section entitled “Risk Factors” contained in our Annual Report on Form 10-K for the year ended December 31, 2022 and our subsequent Quarterly Reports, together with other information in this prospectus, the information and documents incorporated by reference herein, and in any free writing prospectus that we have authorized for use in connection with this offering. If any of these risks actually occur, our business, financial condition, results of operations, or cash flow could be seriously harmed. This could cause the trading price of our common stock to decline, resulting in a loss of all or part of your investment. Please also read carefully the section above titled “Cautionary Note Regarding Forward-Looking Statements.”

Risks Related to this Offering

Sales of our common stock registered for resale by the Selling Stockholders pursuant to this prospectus or the perception of such sales in the public market or otherwise could cause the market price for our common stock to decline.

The sale of shares of our common stock in the public market or otherwise, including sales pursuant to this prospectus, or the perception that such sales could occur, could reduce the prevailing market price of shares of our common stock and increase the volatility of our share price. These sales, or the possibility that these sales may occur, also might make it more difficult for us:

	(i)	to sell equity securities in the future at a time and at a price that we deem appropriate; and
	(ii)	to comply with the Nasdaq listing standards with regard to the minimum bid price of our common stock.

Resales of our common stock may cause the market price of our securities to drop significantly, even if our business is doing well.

The shares of common stock being offered for resale pursuant to this prospectus by the Selling Stockholders represent approximately 48.4% of the outstanding shares of common stock as of November 28, 2023 and approximately 99% of our public float. After the registration statement, of which this prospectus is a part, is effective and until such time that it is no longer effective, the registration statement registering the Resale Shares will permit the resale of these shares. As such, sales of a substantial number of shares of our common stock in the public market could occur at any time.

Risks Related to Our Securities

We may become a “controlled company” within the meaning of the applicable rules of Nasdaq and, as a result, may qualify for exemptions from certain corporate governance requirements. If we rely on these exemptions, our stockholders will not have the same protections afforded to stockholders of companies that are subject to such requirements.

Jefferey Wang, a member of our board of directors and the sole manager of AJP, beneficially owns approximately 45.3% of the issued and outstanding shares of our common stock as of November 28, 2023. Although the sale of shares of our common stock pursuant to this prospectus may decrease the beneficial ownership of Mr. Wang, in the event of purchasing more shares of our common stock Mr. Wang may control a majority of the voting power, and we may then be a “controlled company” within the meaning of applicable rules of the Nasdaq at the time of conversion. Under these rules, a company is a “controlled company” if more than 50% of the voting power for the election of directors is held by an individual, group, or another company, and such company may elect not to comply with certain corporate governance requirements, including the requirements that the company have: (i) a majority of its board of directors comprised of independent directors; (ii) a nominating and corporate governance committee comprised solely of independent directors; (iii) a compensation committee comprised solely of independent directors; and (iv) an annual performance evaluation of the nominating and corporate governance and compensation committees.

Though we currently neither anticipate becoming a “controlled company,” nor taking advantage of any “controlled company” exemptions even if deemed to be a “controlled company,” if we were to be deemed to be a “controlled company” and were to elect to be exempt from some or all of these corporate governance requirements, you may not have the same protections afforded to stockholders of companies that are subject to all of the Nasdaq corporate governance requirements.

USE OF PROCEEDS

We will not receive any proceeds from the sale of the Resale Shares by the Selling Stockholders.

The Selling Stockholders will receive all of the net proceeds from the sale of the Resale Shares under this prospectus. The Selling Stockholders will pay any underwriting, broker-dealer or agent discounts, concessions and commissions, and expenses incurred by the Selling Stockholders for accounting, tax, and legal services and any other expenses incurred by the Selling Stockholders in disposing of the Resale Shares, unless otherwise agreed to by us. We will be responsible for the reasonable and documents fees and expenses of one firm of attorneys retained by the Selling Stockholders in connection with the sale of the Resale Shares and shall bear all other costs, fees, and expenses incurred in effecting the registration of the Resale Shares covered by this prospectus.

SELLING STOCKHOLDERS

The Resale Shares being offered by the Selling Stockholders were issued and sold pursuant to the Subscription Agreement. For additional information regarding the issuance of the Resale Shares, see the section titled “Certain Relationship with Selling Stockholders” below. We are registering the Resale Shares in order to permit the Selling Stockholders to offer the shares for resale from time to time.

The table below lists the Selling Stockholders, describes their relationship to Sonim, and provides other information regarding the beneficial ownership of the shares of our common stock held by each of the Selling Stockholders. The second column lists the number of shares of common stock beneficially owned by each of the Selling Stockholders. The third column lists the shares of our common stock being offered by this prospectus by the Selling Stockholders. The fourth column assumes the sale of all of the shares offered by the Selling Stockholders pursuant to this prospectus. The information does not necessarily indicate beneficial ownership for any other purpose, including for purposes of Sections 13(d) and 13(g) of the Securities Act.

The Selling Stockholders may sell all, some, or none of their shares in this offering. For more information, see the section titled “Plan of Distribution.”

The number of shares and percentages of beneficial ownership set forth below are based on 43,067,433 shares of our common stock outstanding as of November 28, 2023. Beneficial ownership is determined under the SEC rules and regulations and generally includes voting or investment power over securities. We have prepared the table based on information given to us by, or on behalf of, the Selling Stockholders. Information concerning the Selling Stockholders may change from time to time. We cannot advise you as to whether the Selling Stockholders will in fact sell any or all of the securities being offered hereunder. In addition, the Selling Stockholders may sell, transfer, or otherwise dispose of, at any time and from time to time, the securities in transactions exempt from the registration requirements of the Securities Act after the date of this prospectus. In addition, since the date on which the Selling Stockholders provided this information to us, such Selling Stockholders may have sold, transferred, or otherwise disposed of all or a portion of the offered securities. The address of the Selling Stockholders is 4445 Eastgate Mall, Suite 200, San Diego, CA 92121, Attn.: Selling Stockholders.

Certain Relationship with Selling Stockholders

Subscription Agreement

On April 13, 2022, we entered into the Subscription Agreement with AJP, pursuant to which AJP agreed to purchase an aggregate of 20,833,333 shares of our common stock for an aggregate purchase price of $17,500,000 (or $0.84 per share). In accordance with the Subscription Agreement, Peter Liu, who then served as our Executive VP for Global Operations and Engineering, was appointed as our Chief Executive Officer. The Subscription Agreement additionally provided for the purchase of a certain portion of the shares issuable thereunder by Mr. Liu rather than the AJP: accordingly, Mr. Liu purchased 952,381 shares of our common stock pursuant to the Subscription Agreement. Mr. Wang, a member of our board of directors, is the sole manager and the owner of 40% of the membership interests in AJP.

On June 28, 2022, we held a special meeting of stockholders, whereby our stockholders approved the Subscription Agreement and the transactions contemplated thereby by approximately 71.98% of the votes cast. The closing of the transaction under the Subscription Agreement resulted in a change of control of Sonim and the appointment of new independent directors (who were subsequently re-elected at an annual meeting).

Support Agreements

Following the Special Meeting, on July 13, 2022, the Company and AJP consummated the First Closing, as such term is defined in the Subscription Agreement. In accordance with the terms of the Subscription Agreement, on July 13, 2022, the Company and AJP entered into a support agreement (the “Purchaser Support Agreement”), whereby the AJP agreed, among other things, to vote the shares of common stock owned by AJP in favor of the election of certain of our directors, as well as such other matters set forth in the Purchaser Support Agreement. The Purchaser Support Agreement also required, as a condition to AJP transferring any shares of our common stock owned by AJP, that the acquirer of such shares of common stock agree to be bound by the terms of the Purchaser Support Agreement.

In accordance with the terms of the Subscription Agreement, on July 13, 2022, the Company and Mr. Liu entered into a support agreement (the “Designee Support Agreement”). The terms of the Designee Support Agreement were analogous to the terms of the Purchaser Support Agreement, provided that the Designee Support Agreement extended its requirements solely to 952,381 shares of our common stock issued during the First Closing rather than the entirety of the shares of common stock owned by Mr. Liu.

Both the Purchaser Support Agreement and the Designee Support Agreement were terminated at the Director End Time (as such is term defined in the Subscription Agreement) due to the formal conclusion of a certain investigation relating to the Company by the SEC.

Registration Rights Agreement

In accordance with the terms of the Subscription Agreement, on July 13, 2022, the Company and AJP entered into the Registration Rights Agreement. Pursuant to the Registration Rights Agreement, we are required (among other things), within 30 days of the Second Closing (as defined in the Subscription Agreement), to file with the SEC a registration statement to register the resale of all registrable securities held by AJP or any person that receives Registrable Securities (as that term is defined in the Registration Rights Agreement) (each a “Holder”). The Company’s obligation to register the Registrable Securities for sale under the Securities Act of 1933 terminates upon the first to occur of (i) the date that is five years from the effective date of the shelf registration statement filed by the Company pursuant to the Registration Rights Agreement, (ii) the date on which all Holders can sell shares of our common stock under Rule 144 without volume restrictions, and (iii) the date on which no registrable securities are held by any Holder.

PLAN OF DISTRIBUTION

Resales by Selling Stockholders

We are registering the resale of the Resale Shares on behalf of the Selling Stockholders pursuant to the terms of the Registration Rights Agreement, which agreement is incorporated herein by reference. The term “Selling Stockholders” also includes persons who obtain the Resale Shares from the Selling Stockholders as a gift, on foreclosure of a pledge, in a distribution or dividend of assets by an entity to its equity holders or partners, as an assignee, transferee or other successor-in-interest, or in another private transaction.

Types of Sale Transactions

The Selling Stockholders may offer and sell the Resale Shares, from time to time, following the effectiveness of the registration statement to which this prospectus is a part. The Selling Stockholders will act independently of us in making decisions with respect to the timing, manner, and size of each sale. The Resale Shares may be sold at:

The Selling Stockholders may sell their Resale Shares by one or more of, or a combination of, the following methods to the extent permitted by applicable rules and regulations or additional obligations of the Selling Stockholders due to our corporate governance documents including but not limited to our insider transaction policy:

These transactions may include block transactions or crosses. Crosses are transactions in which the same broker acts as an agent on both sides of the trade.

The Selling Stockholders will act independently of us in making decisions with respect to the timing, manner, and size of each resale or other transfer. We do not know of specific arrangements by the Selling Stockholders for the sale of their Resale Shares. The aggregate proceeds to the Selling Stockholders from any sale of the Resale Shares offered by them will be the purchase price of the Resale Shares less discounts or commissions, if any. The Selling Stockholders reserve the right to accept and, together with its respective agents from time to time, to reject, in whole or in part, any proposed purchase of the Resale Shares to be made directly or through agents. We will not receive any of the proceeds from any such sale.

Broker-dealers engaged by the Selling Stockholders may arrange for other broker-dealers to participate in sales. Broker-dealers may receive commissions or discounts from the Selling Stockholders (or, if any broker-dealer acts as agent for the purchaser of securities, from the purchaser) in amounts to be negotiated, but, except as set forth in a supplement to this Prospectus, in the case of an agency transaction not in excess of a customary brokerage commission in compliance with FINRA Rule 2121; and in the case of a principal transaction a markup or markdown in compliance with FINRA Rule 2121.

In connection with the sale of the securities or interests therein, the Selling Stockholders may enter into hedging transactions with broker-dealers or other financial institutions, which may in turn engage in short sales of the securities in the course of hedging the positions they assume. The Selling Stockholders may also sell securities short and deliver these securities to close out their short positions, or loan or pledge the securities to broker-dealers that in turn may sell these securities. The Selling Stockholders may also enter into option or other transactions with broker-dealers or other financial institutions or create one or more derivative securities which require the delivery to such broker-dealer or other financial institution of securities offered by this prospectus, which securities such broker-dealer or other financial institution may resell pursuant to this prospectus (as supplemented or amended to reflect such transaction). We may suspend the sale of securities by the Selling Stockholders pursuant to this prospectus for certain periods of time for certain reasons, including if the prospectus is required to be supplemented or amended to include additional material information, and we may file a post-effective amendment to the registration statement of which this prospectus is a part to include any material information with respect to the plan of distribution not previously disclosed in the registration statement or any material change to such information in the registration statement.

The Selling Stockholders also may transfer the securities in other circumstances, in which case the transferees, pledgees, or other successors-in-interest will be the selling beneficial owners for purposes of this prospectus. Upon being notified by a Selling Stockholder that a donee, pledgee, transferee, other successor-in-interest intends to sell our securities, we will, to the extent required and youpermitted, promptly file a supplement to this prospectus to name specifically such person as a Selling Stockholder. The Selling Stockholders may, obtain copiesfrom time to time, pledge or grant a security interest in some shares of those documentsthe securities owned by them and, if a Selling Stockholder defaults in the performance of its secured obligations, the pledgees or secured parties may offer and sell such shares of the securities, from time to time, under this prospectus, or under an amendment or supplement to this prospectus amending the list of the Selling Stockholders to include the pledgee, transferee or other successors in interest as described belowthe Selling Stockholders under this prospectus. The Selling Stockholders also may transfer shares of the securities in other circumstances, in which case the transferees, pledgees, or other successors in interest will be the selling beneficial owners for purposes of this prospectus.

The Selling Stockholders and any broker-dealers or agents that participate in the sale of the Resale Shares may be deemed to be “underwriters” within the meaning of Section 2(11) of the Securities Act. Any discounts, commissions, concessions, or profit they earn on any resale of the shares may be underwriting discounts and commissions under the heading “Where You Can Find More Information.”Securities Act. The Selling Stockholders are subject to the prospectus delivery requirements of the Securities Act.

This prospectus

We have agreed to indemnify each seller of Resale Shares, each of its employees, advisors, agents, representatives, partners, officers, and directors, and each person who controls such seller (within the meaning of the Securities Act), and any agent or investment advisor thereof against certain liabilities arising under the Securities Act from sales of the Resale Shares. The Selling Stockholders may agree to indemnify any agent, broker, or dealer that participates in sales of the Resale Shares against liabilities arising under the Securities Act from sales of the Resale Shares.

We have agreed to pay certain expenses incurred in connection with the registration and sale of the Resale Shares covered by this prospectus, including, among other things, all registration and filing fees (including SEC, Nasdaq, and state blue sky registration and filing fees), printing expenses, and the fees and disbursements of our outside counsel and independent accountants, but excluding underwriting discounts and commissions.

Under applicable prospectus supplement do not constitute an offer to sell orrules and regulations under the solicitationExchange Act, any person engaged in the distribution of an offer to buy any securities other than the registered securities to which they relate. We are not making offers to sellshares of our common stock may not simultaneously engage in market-making activities with respect to the common stock for the applicable restricted period, as defined in Regulation M, prior to the commencement of the distribution. In addition, the Selling Stockholders will be subject to applicable provisions of the Exchange Act and the rules and regulations thereunder, including Regulation M, which may limit the timing of purchases and sales of the common stock by the Selling Stockholders or any other securities described inperson. We will make copies of this prospectus available to the Selling Stockholders and have informed them of the need to deliver a copy of this prospectus to each purchaser at or prior to the time of the sale (including by compliance with Rule 172 under the Securities Act). Once sold under the registration statement of which this prospectus forms a part, the shares of our common stock will be freely tradable in any jurisdictionthe hands of persons other than our affiliates.

LEGAL MATTERS

The validity of the issuance of the common stock offered hereby will be passed upon for us by Venable LLP, New York, New York. Any underwriters or agents will be advised about other issues relating to the offering by counsel to be named in which an offer or solicitation is not authorized or in which we are not qualified to do so or to anyone to whom it is unlawful to make an offer or solicitation.the applicable prospectus supplement.

Unless otherwise expressly indicated or the context otherwise requires, we use the terms “Sonim,” the “Company,” “we,” “us,” “our” or similar references to refer to

EXPERTS

The consolidated financial statements of Sonim Technologies, Inc. incorporated in this Registration Statement on Form S-3 by reference from Sonim Technologies, Inc.’s Annual Report on Form 10-K for the year ended December 31, 2022, have been audited by Moss Adams LLP, an independent registered public accounting firm, as stated in their report (which report expresses an unqualified opinion and its subsidiaries.

WHERE YOU CAN FIND MORE INFORMATION

We have filed our

This prospectus forms part of a registration statement on Form S-3 filed with the SEC under the Securities ActAct. This prospectus does not contain all of 1933, as amended,the information set forth in the registration statement and the exhibits to the registration statement or the Securities Act. documents incorporated by reference herein and therein. For further information with respect to us and the securities offered under this prospectus, we refer you to the registration statement and the exhibits and schedules filed as a part of the registration statement and the documents incorporated by reference herein and therein. You should read the actual documents for a more complete description of the relevant matters.

We also file annual, quarterly, and current reports, proxy statements, and other information with the SEC. You may read and copy any document that we file with the SEC, including the registration statement and the exhibits to the registration statement, at the SEC’s Public Reference Room located at 100 F Street, N.E., Washington D.C. 20549. You may obtain further information on the operation of the Public Reference Room by calling the SEC at 1-800-SEC-0330.Our SEC filings are also available to the public over the Internet at the SEC’s web sitewebsite at http://www.sec.gov. These documentsWe also maintain a website at https://ir.sonimtech.com. Through our website, we make available, free of charge, annual, quarterly, and current reports, proxy statements, and other information as soon as reasonably practicable after they are electronically filed with, or furnished to, the SEC. The information contained on, or that may also be accessed onthrough, our web site at www.sonimtech.com. Information contained on our web sitewebsite is not part of, and is not incorporated by reference into this prospectus and you should not consider information contained on our web site to be part of this prospectus.

This prospectus and any prospectus supplement are part of a registration statement filed with the SEC and do not contain all of the information in the registration statement. The full registration statement may be obtained from the SEC or us as indicated above. Forms of any indenture or other documents establishing the terms of the offered securities are filed as exhibits to the registration statement or will be filed through an amendment to our registration statement on Form S-3 or under cover of a Current Report on Form 8-K and incorporated into this prospectus by reference.

INFORMATION WE INCORPORATEINCORPORATION BY REFERENCE

The SEC allows us to “incorporate by reference” into this prospectus the information from other documents that we file with it, which means that we can disclose important information to you by referring you to those publicly available documents. The information incorporated by reference is considered to be part of this prospectus. Any statement contained hereinInformation in this prospectus supersedes information incorporated by reference that we filed with the SEC prior to the date of this prospectus, while information that we file later with the SEC will automatically update and supersede the information in this prospectus. This means that you must look at all of the SEC filings that we incorporate by reference to determine if any of the statements in this prospectus or in aany document previously incorporated by reference have been modified or deemed to be incorporatedsuperseded.

We incorporate by reference into this document will be deemed to be modified or superseded for purposesprospectus and the registration statement of the document to the extent that a statement contained in this document or any other subsequently filed document that is deemed to be incorporated by reference into this document modifies or supersedes the statement. We incorporate by reference inwhich this prospectus is a part the following information (other than, in each case,or documents or information deemed tolisted below that we have been furnished and not filed in accordance with SEC rules):under the Exchange Act:

We also incorporate by reference each of the documents that we file with the SEC under Sections 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act of 1934, as amended, or the Exchange Act, on or after the date ofinto this prospectus and prior to the termination of the offeringsall documents (other than current reports furnished under this prospectus and any prospectus supplement. These documents include periodic reports, such as Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q and Current Reports on Form 8-K, as well as proxy statements. We will not, however, incorporate by reference in this prospectus any documents or portions thereof that are not deemed “filed” with the SEC, including any information furnished pursuant to Item 2.02 or Item 7.01 of our Current ReportsForm 8-K and exhibits furnished on Form 8-K after the date of this prospectus unless, and exceptsuch form that are related to the extent, specified in such Current Reports.

We will provide to each person, including any beneficial owner, to whom a prospectus (or a notice of registration in lieu thereof) is delivered a copy of any of these filings (other than an exhibit to these filings, unless the exhibit is specifically incorporateditems) that are filed by reference as an exhibit to this prospectus) at no cost, upon a request to us by writing or telephoning us at the following address and telephone number:

Sonim Technologies, Inc.

6836 Bee Cave Road, Bldg. 1, S#279

Austin, Texas 787

(650) 378-8100

SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

This prospectus, including the documents incorporated by reference herein, may contain or incorporate “forward-looking statements” within the meaning of Section 21E of the Securities Exchange Act of 1934. We have based these forward-looking statements on our current expectations and projections about future events or future financial performance, which include successfully implementing our business strategy and realizing planned cost-savings, achieving profitability and continuing as a going concern developing and introducing new technologies, obtaining, maintaining and expanding market acceptance of the technologies we offer, and competition in our markets.

In some cases, these forward-looking statements can be identified by terminology such as “may,” “will,” “should,” “expect,” “plan,” “anticipate,” “believe,” “estimate,” “future,” “predict,” “potential,” “intend,” or “continue,” and similar expressions. These statements are based on the beliefs and assumptions of our management and on information currently available to our management. Our actual results, performance and achievements may differ materially from the results, performance and achievements expressed or implied in such forward-looking statements. For a discussion of some of the factors that might cause such a difference, see the “Risk Factors” contained in Part I, Item 1A of our Annual Report on Form 10-K for the year ended December 31, 2020. Except as required by law, we specifically disclaim any obligation to update such forward-looking statements.

Sonim Technologies, Inc.

Sonim Technologies, Inc. was incorporated in the state of Delaware on August 5, 1999 and is headquartered in Austin, Texas. Unless otherwise indicated, the terms “we,” “us,” “our,” “Company” and “Sonim” refer to Sonim Technologies, Inc. and its wholly owned and consolidated subsidiaries.

We are a leading U.S. provider of ultra-rugged mobile phones and accessories designed specifically for task workers physically engaged in their work environments, often in mission-critical roles. We currently sell our ruggedized mobile phones and accessories to three of the four largest wireless carriers in the United States— AT&T, T-Mobile (referred to collectively as Sprint) and Verizon—as well as the three largest wireless carriers in Canada—Bell, Rogers and Telus Mobility. Our phones and accessories connect workers with voice, data and workflow applications in two end markets: industrial enterprise and public sector.

Task workers in these end markets have historically been limited to pen and paper and single-purpose electronic devices, such as barcode scanners, location-tracking devices and sensors, to accomplish specific tasks. These single-purpose devices have historically run on proprietary networks, such as Land Mobile Radio (LMR) networks that enable Push-to-Talk (PTT) services for voice communications. We provide Android-based devices that consolidate and integrate multiple functions into a single ruggedized solution running on commercial wireless networks at a total cost of ownership that we believe is significantly lower with improved productivity and safety of task workers.

Our solutions consist primarily of ultra-rugged mobile phones based on the Android platform which are capable of attaching to both public and private wireless networks, industrial-grade accessories that meet the requirements of specific applications, and software applications and cloud-based tools that provide management and deployment services to our customers. End customers of our solutions include construction, energy and utility, hospitality, logistics, manufacturing, public sector and transportation entities that primarily purchase our devices and accessories through their wireless carriers. The key attributes of our solutions are specifically tailored for the needs of our end users, including impact resistance, waterproof and dustproof construction, extended battery life and extra loud audio, supported by a three-year comprehensive warranty. All of our devices run on the Android operating system, providing a familiar and intuitive user interface, and our smartphones have access to a library of millions of applications available through the Google Play Store. We have also implemented dozens of application programming interfaces, or APIs, specific to our mobile phones and have partnered with third-party application developers to create a purpose-built experience for our end users using these applications on our mobile phones.

We currently have stocked product with three of the four largest U.S. wireless carriers: AT&T, T-Mobile (which acquired Sprint in 2020) and Verizon, meaning that these carriers test and certify our mobile phones on their networks and maintain inventory in their warehouses that they then sell through their enterprise and retail sales teams to end customers, often on a subsidized or financed basis. Our full product portfolio has been stocked with the three largest Canadian wireless carriers since 2015. In 2020, we sold approximately 33,000 mobile phones in Canada and 205,000 in the United States (which markets include rugged feature phones, smart consumer rugged phones, smart ultra-rugged phones and life-proofed smart phones).

We enter into master sales arrangements with carriers (including channel partners contributing over 90% of our total revenues for the year ended December 31, 2020) under which our partners purchase our solutions for distribution on a purchase order basis. Under these arrangements, we and the channel partners determine sales channel distribution in connection with pricing (including any discounts and price protection) and market positioning of each particular mobile phone product. We also offer our channel partners channel marketing and other promotional incentives, such as sales volume incentives, in exchange for retail price reductions. We may also offer NRE services in the form of third-party design services relating to the design of materials and software licenses used in the manufacturing of our products.

RISK FACTORS

Investing in our securities involves a high degree of risk. Before making an investment decision, you should carefully consider any risk factors set forth in the applicable prospectus supplement and the documents incorporated by reference in this prospectus, including the factors discussed under the heading “Risk Factors” in our most recent Annual Report on Form 10-K and each subsequently filed Quarterly Report on Form 10-Q and any risk factors set forth in our other filings with the SEC pursuant to Sections 13(a), 13(c), 14 or 15(d) of the Securities Exchange. See “Where You Can Find More Information” and “Information We Incorporate By Reference.” EachExchange Act after the date of this prospectus but prior to the termination of the risks described in these documents could materially and adversely affect our business, financial condition, results of operations and prospects, and could result in a partial or complete loss of your investment. Additional risks and uncertainties not presently known to us, or that we currently deem immaterial, may also adversely affect our business.offering. In addition, past financial performance may not be a reliable indicator of future performanceall reports and historical trends should not be usedother documents filed by us pursuant to anticipate results or trends in future periods.

USE OF PROCEEDS

We will retain broad discretion over the useExchange Act after the date of the net proceeds from the saleinitial registration statement and prior to effectiveness of the securities offered hereby. Unless otherwise specified in any prospectus supplement, we currently intend to use the net proceeds from the sale of our securities offered under this prospectus for working capital and general corporate purposes including, but not limited to, capital expenditures, working capital, repayment of indebtedness, potential acquisitions and other business opportunities.Pending any specific application, we may initially invest funds in short-term marketable securities or apply them to the reduction of indebtedness.

DESCRIPTION OF DEBT SECURITIES

The following description, together with the additional information we include in any applicable prospectus supplement, summarizes certain general terms and provisions of the debt securities that we may offer in one or more series under this prospectus. When we offer to sell a particular series of debt securities, we will describe the specific terms of the series in a supplement to this prospectus. We will also indicate in the supplement to what extent the general terms and provisions described in this prospectus apply to a particular series of debt securities.

We may issue debt securities either separately, or together with, or upon the conversion or exercise of or in exchange for, other securities described in this prospectus. Debt securities may be our senior, senior subordinated or subordinated obligations and, unless otherwise specified in a supplement to this prospectus, the debt securities will be our direct, unsecured obligations.

We will issue the debt securities under the indenture that we will enter into with a national banking association or other eligible party, as trustee. The indenture will be qualified under the Trust Indenture Act of 1939, as amended, or the Trust Indenture Act. We have filed the form of indenture as an exhibit to the registration statement of which this prospectus is a part, and supplemental indentures and forms of debt securities containing the terms of the debt securities being offered willshall be filed as exhibitsdeemed to the registration statement of which this prospectus is a part or will be incorporated by reference into this prospectus. All such documents are deemed to be part of this prospectus from the date of the filing of such reports thatand documents.

Notwithstanding the foregoing, we fileare not incorporating any document or information deemed to have been furnished and not filed in accordance with SEC rules. No additional information is deemed to be part of or incorporated by reference into this prospectus.

You may obtain any of the documents incorporated by reference in this prospectus from the SEC through the SEC’s website at the address provided above. You may also request and we will provide, free of charge, a copy of any document incorporated by reference in this prospectus (excluding exhibits to such document unless an exhibit is specifically incorporated by reference in the document) by visiting our internet website at https://ir.sonimtech.com or by writing or calling us at the following address and telephone number:

Sonim Technologies, Inc.

4445 Eastgate Mall, Suite 200

San Diego, CA 92121

Telephone: (650) 378-8100

Attn.: Chief Financial Officer

You should rely only on the information contained in, or incorporated by reference into, this prospectus, in any accompanying prospectus supplement, or in any free writing prospectus filed by us with the SEC.

The following summary of material provisions of We have not authorized anyone to provide you with different or additional information. We are not offering to sell or soliciting any offer to buy any securities in any jurisdiction where the debt securities and the indenture is subject to, and qualified in its entirety by reference to, all of the provisions of the indenture applicable to a particular series of debt securities. The summaryoffer or sale is not complete. The form ofpermitted. You should not assume that the indenture has been filed as an exhibit to the registration statement and you should read the indenture for provisions that may be important to you. We urge you to read the applicable prospectus supplements and any related free writing prospectuses related to the debt securities that we may offer under this prospectus, as well as the complete indenture that contains the terms of the debt securities.

General

We can issue an unlimited amount of debt securities under the indenture that may be in one or more series with the same or various maturities, at par, at a premium, or at a discount. The terms of each series of debt securities will be established by or pursuant to a resolution of our board of directors and set forth in an officer’s certificate or a supplemental indenture. The particular terms of each series of debt securities will be described in a prospectus supplement relating to such series (including any pricing supplement or term sheet), including the following terms, if applicable:

We may issue debt securities that provide for an amount less than their stated principal amount to be due and payable upon maturity or a declaration of acceleration of their maturity following an event of default pursuant to the terms of the indenture. We will provide you with information on the federal income tax considerations and other special considerations applicable to any of these debt securities in the applicable prospectus supplement.

If we denominate the purchase price of any of the debt securities in a foreign currency or currencies or a foreign currency unit or units, or if the principal of and any premium and interest on any series of debt securities is payable in a foreign currency or currencies or a foreign currency unit or units, we will provide you with information on the restrictions, elections, general tax considerations, specific terms and other information with respect to that issue of debt securities and such foreign currency or currencies or foreign currency unit or units in the applicable prospectus supplement.

Transfer and Exchange

Each debt security will be represented by either one or more global securities registered in the name of The Depository Trust Company, or the depositary, or a nominee of the depositary (we will refer to any such debt security as a “global debt security”), or a certificate issued in definitive registered form (we will refer to any debt security represented by a certificate as a “certificated debt security”) as set forth in the applicable prospectus supplement. Except as set forth below, global debt securities will not be issuable in certificated form.

Certificated Debt Securities

You may transfer or exchange certificated debt securities at any office we maintain for this purpose in accordance with the terms of the indenture. No service charge will be made for any transfer or exchange of certificated debt securities, but we may require payment of a sum sufficient to cover any tax or other governmental charge payable in connection with a transfer or exchange.

You may effect the transfer of certificated debt securities and the right to receive the principal of, premium and interest on certificated debt securities only by surrendering the certificate representing those certificated debt securities and either reissuance by us or the trustee of the certificate to the new holder or the issuance by us or the trustee of a new certificate to the new holder.

Global Debt Securities and Book-Entry System

Each global debt security will be deposited with, or on behalf of, the depositary, and registered in the name of the depositary or a nominee of the depositary. Beneficial interests in global debt securities will not be issuable in certificated form unless (i) the depositary has notified us that it is unwilling or unable to continue as depositary for such global debt security or has ceased to be qualified to act as such as required by the indenture and we fail to appoint a successor depositary within 90 days of such event, (ii) we determine, in our sole discretion, not to have such securities represented by one or more global securities or (iii) any other circumstances shall exist, in addition to or in lieu of those described above, as may be described in the applicable prospectus supplement. Unless and until a global debt security is exchanged for certificated debt securities under the limited circumstances described in the previous sentence, a global debt security may not be transferred except as a whole by the depositary to its nominee or by the nominee to the depositary, or by the depositary or its nominee to a successor depositary or to a nominee of the successor depositary.

Covenants

We will set forth in the applicable prospectus supplement any restrictive covenants applicable to any issue of debt securities.

No Protection In the Event of a Change of Control

Unless we state otherwise in the applicable prospectus supplement, the debt securities will not contain any provisions which may afford holders of the debt securities protection in the event we have a change in control or in the event of a highly leveraged transaction (whether or not such transaction results in a change in control) which could adversely affect holders of debt securities.

Consolidation, Merger and Sale of Assets

Sonim may not consolidate with or merge with or into, or convey, transfer or lease all or substantially all of its assets to any person (a “successor person”) unless:

Notwithstanding the above, any of Sonim’s subsidiaries may consolidate with, merge into or transfer all or part of its properties to Sonim.

Events of Default

“Event of Default” means with respect to any series of debt securities, any of the following:

No event of default with respect to a particular series of debt securities (except as to certain events of bankruptcy, insolvency or reorganization) necessarily constitutes an event of default with respect to any other series of debt securities. The occurrence of certain events of default or an acceleration under the indenture may constitute an event of default under certain indebtedness of ours or our subsidiaries outstanding from time to time.

If an event of default with respect to any series of debt securities at the time outstanding occurs and is continuing (other than an event of default resulting from certain events of bankruptcy, insolvency or reorganization), then the trustee or the holders of not less than 25% in principal amount of the outstanding debt securities of that series may, by a notice in writing to us (and to the trustee if given by the holders), declare to be due and payable immediately the principal of (or, if the debt securities of that series are discount securities, that portion of the principal amount as may be specified in the terms of that series) and accrued and unpaid interest, if any, on all debt securities of that series. In the case of an event of default resulting from certain events of bankruptcy, insolvency or reorganization, the principal amount (or such specified amount) of and accrued and unpaid interest, if any, on all outstanding debt securities will become and be immediately due and payable without any declaration or other act on the part of the trustee or any holder of outstanding debt securities. At any time after a declaration of acceleration with respect to debt securities of any series has been made, but before a judgment or decree for payment of the money due has been obtained by the trustee, the holders of a majority in principal

amount of the outstanding debt securities of that series, by written notice to us and the trustee, may rescind and annul such declaration of acceleration and its consequences if all events of default,date other than the non-payment of accelerated principal and interest, if any, with respect to debt securities of that series, have been cured or waived as provided in the indenture. We refer you to the prospectus supplement relating to any series of debt securities that are discount securities for the particular provisions relating to acceleration of a portion of the principal amount of such discount securities upon the occurrence of an event of default.

The indenture provides that the trustee will be under no obligation to perform any duty or exercise any of its rights or powers under the indenture unless the trustee receives indemnity satisfactory to it against any cost, liability or expense which might be incurred by it in performing such duty or exercising such right of power. Subject to certain rights of the trustee, the holders of a majority in principal amount of the outstanding debt securities of any series will have the right to direct the time, method and place of conducting any proceeding for any remedy available to the trustee or exercising any trust or power conferreddate on the trustee with respect to the debt securities of that series.

No holder of any debt security of any series will have any right to institute any proceeding, judicial or otherwise, with respect to the indenture or for the appointment of a receiver or trustee, or for any remedy under the indenture, unless:

Notwithstanding any other provision in the indenture, the holder of any debt security will have an absolute and unconditional right to receive payment of the principal of, and any interest on, that debt security on or after the due dates expressed in that debt security (or, in the case of redemption, on the redemption date) and to institute suit for the enforcement of any such payment and such rights shall not be impaired without the consent of such holder.

The indenture requires us, within 120 days after the end of our fiscal year, to furnish to the trustee a statement as to compliance with the indenture from our principal executive officer, principal financial officer or principal accounting officer. If a default or event of default occurs and is continuing with respect to the debt securities of any series and if it is actually known to a responsible officer of the trustee, the trustee shall mail to each holder of the debt securities of that series notice of a default or event of default within 60 days after it occurs or, if later, after a responsible officer of the trustee has knowledge of such default or event of default. The indenture provides that the trustee may withhold notice to the holders of debt securities of any series of any default or event of default (except in payment on any debt securities of that series) with respect to debt securities of that series if the trustee determines in good faith that withholding notice is in the interest of the holders of those debt securities.

Modification and Waiver

We and the trustee may modify and amend or supplement the indenture or the debt securities of one or more series without the consent of any holder of any debt security:

Except for certain specified provisions, the holders of at least a majority in principal amount of the outstanding debt securities of any series may, on behalf of the holders of all debt securities of that series, by written notice to the trustee, waive our compliance with provisions of the indenture or the debt securities with respect to such series. The holders of a majority in principal amount of the outstanding debt securities of any series may, on behalf of the holders of all the debt securities of such series, waive any past default under the indenture with respect to that series and its consequences, except a default in the payment of the principal of, or any interest on, any debt security of that series; provided, however, that the holders of a majority in principal amount of the outstanding debt securities of any series may rescind an acceleration and its consequences, including any related payment default that resulted from the acceleration.

Defeasance of Debt Securities and Certain Covenants in Certain Circumstances

Legal Defeasance

The indenture provides that, unless otherwise provided by the terms of the applicable series of debt securities, we may be discharged from any and all obligations in respect of the debt securities of any series (subject to certain exceptions). We will be so discharged upon the deposit with the trustee, in trust, of money and/or U.S. government obligations or, in the case of debt securities denominated in a single currency other than U.S. dollars, government obligations of the government that issued or caused to be issued such currency, that, through the payment of interest and principal in accordance with their terms, will provide money in an amount sufficient in the opinion of a nationally recognized firm of independent public accountants or investment bank to pay and discharge each installment of principal and interest, if any, on and any mandatory sinking fund payments in respect of the debt securities of that series on the stated maturity of those payments in accordance with the terms of the indenture and those debt securities.

This discharge may occur only if, among other things, we have delivered to the trustee an opinion of counsel stating that we have received from, or there has been published by, the United States Internal Revenue Service a ruling or, since the date of execution of the indenture, there has been a change in the applicable United States federal income tax law, in either case to the effect that, and based thereon such opinion shall confirm that, the holders of the debt securities of that series will not recognize income, gain or loss for United States federal income tax purposes as a result of the deposit, defeasance and discharge and will be subject to United States federal income tax on the same amounts and in the same manner and at the same times as would have been the case if the deposit, defeasance and discharge had not occurred.

Defeasance of Certain Covenants

The indenture provides that, unless otherwise provided by the terms of the applicable series of debt securities, upon compliance with certain conditions:

The conditions include:

Governing Law

The indenture and the debt securities, including any claim or controversy arising out of or relating to the indenture or the securities, will be governed by the laws of the State of New York (without regard to the conflicts of laws provisions thereof other than Section 5-1401 of the General Obligations Law).

DESCRIPTION OF WARRANTS

General

The following description, together with the additional information we include in any applicable prospectus supplement, summarizes the material terms and provisions of the warrants that we may offer under this prospectus, which consist of warrants to purchase shares of common stock, preferred stock and/or debt securities in one or more series. Warrants may be offered independently or together with shares of common stock, preferred stock and/or debt securities offered by any prospectus supplement and may be attached to or separate from those securities.

While the terms we have summarized below will generally apply to any future warrants we may offer under this prospectus, we will describe the particular terms of any warrants that we may offer in more detail in the applicable prospectus supplement. The specific terms of any warrants may differ from the description provided below as a result of negotiations with third parties in connection with the issuance of those warrants, as well as for other reasons. Because the terms of any warrants we offer under a prospectus supplement may differ from the terms we describe below, you should rely solely on information in the applicable prospectus supplement if that summary is different from the summary in this prospectus.

We will issue the warrants under a warrant agreement, which we will enter into with a warrant agent to be selected by us. We use the term “warrant agreement” to refer to any of these warrant agreements. We use the term “warrant agent” to refer to the warrant agent under any of these warrant agreements. The warrant agent will act solely as an agent of ours in connection with the warrants and will not act as an agent for the holders or beneficial owners of the warrants.

We will incorporate by reference into the registration statement of which this prospectus is a part the form of warrant agreement, including a form of warrant certificate, that describes the terms of the series of warrants we are offering before the issuance of the related series of warrants. The following summaries of material provisions of the warrants and the warrant agreements are subject to, and qualified in their entirety by reference to, all the provisions of the warrant agreement applicable to a particular series of warrants. We urge you to read any applicable prospectus supplement related to the warrants that we sell under this prospectus, as well as the complete warrant agreement that contain the terms of the warrants and defines your rights as a warrant holder.

We will describe in the applicable prospectus supplement the terms relating to a series of warrants. If warrants for the purchase of debt securities are offered, the prospectus supplement will describe the following terms, to the extent applicable:

Warrants for the purchase of debt securities will be in registered form only.

If warrants for the purchase of shares of common stock or preferred stock are offered, the prospectus supplement will describe the following terms, to the extent applicable:

Warrants for the purchase of shares of common stock or preferred stock will be in registered form only.

A holder of warrant certificates may exchange them for new certificates of different denominations, present them for registration of transfer and exercise them at the corporate trust office of the warrant agent or any other office indicated in the applicable prospectus supplement. Until any warrants to purchase debt securities are exercised, the holder of the warrants will not have any of the rights of holders of the debt securities that can be purchased upon exercise, including any rights to receive payments of principal, premium or interest on the underlying debt securities or to enforce covenants in the applicable indenture. Until any warrants to purchase shares of common stock or preferred stock are exercised, holders of the warrants will not have any rights of holders of the underlying shares of common stock or preferred stock, including any rights to receive dividends or to exercise any voting rights, except to the extent set forth under “Warrant Adjustments” below.

Exercise of Warrants

Each holder of a warrant is entitled to purchase the principal amount of debt securities or number of shares of common stock or preferred stock, as the case may be, at the exercise price described in the applicable prospectus supplement. After the close of business on the day when the right to exercise terminates (or a later date if we extend the time for exercise), unexercised warrants will become void.

A holder of warrants may exercise them by following the general procedure outlined below:

If you comply with the procedures described above, your warrants will be considered to have been exercised when the warrant agent receives payment of the exercise price, subject to the transfer books for the securities issuable upon exercise of the warrant not being closed on such date. After you have completed those procedures

and subject to the foregoing, we will, as soon as practicable, issue and deliver to you the debt securities or shares of common stock or preferred stock that you purchased upon exercise. If you exercise fewer than all of the warrants represented by a warrant certificate, a new warrant certificate will be issued to you for the unexercised amount of warrants. Holders of warrants will be required to pay any tax or governmental charge that may be imposed in connection with transferring the underlying securities in connection with the exercise of the warrants.

Amendments and Supplements to the Warrant Agreements

We may amend or supplement a warrant agreement without the consent of the holders of the applicable warrants to cure ambiguities in the warrant agreement, to cure or correct a defective provision in the warrant agreement, or to provide for other matters under the warrant agreement that we and the warrant agent deem necessary or desirable, so long as, in each case, such amendments or supplements do not materially adversely affect the interests of the holders of the warrants.

Warrant Adjustments

Unless the applicable prospectus supplement states otherwise, the exercise price of, and the number of securities covered by, a warrant for shares of common stock or preferred stock will be adjusted proportionately if we subdivide or combine our common stock or preferred stock, as applicable. In addition, unless the prospectus supplement states otherwise, if we, without payment:

then the holders of common stock warrants or preferred stock warrants will be entitled to receive upon exercise of the warrants, in addition to the securities otherwise receivable upon exercise of the warrants and without paying any additional consideration, the amount of shares and other securities and property such holders would have been entitled to receive had they held the common stock or preferred stock issuable under the warrants on the dates on which holders of those securities received or became entitled to receive such additional shares and other securities and property.

Except as stated above, the exercise price and number of securities covered by a warrant for shares of common stock or preferred stock, and the amounts of other securities or property to be received, if any, upon exercise of those warrants, will not be adjusted or provided for if we issue those securities or any securities convertible into or exchangeable for those securities, or securities carrying the right to purchase those securities or securities convertible into or exchangeable for those securities.

Holders of common stock warrants or preferred stock warrants may have additional rights under the following circumstances:

If one of the above transactions occurs and holders of our common stock or preferred stock are entitled to receive shares, securities or other property with respect to or in exchange for their securities, the holders of the common stock warrants or preferred stock warrants then-outstanding, as applicable, will be entitled to receive upon exercise of their warrants the kind and amount of shares and other securities or property that they would have received upon the applicable transaction if they had exercised their warrants immediately before the transaction.

DESCRIPTION OF RIGHTS

The following description, together with the additional information we include in any applicable prospectus supplement, summarizes the general features of the rights that we may offer under this prospectus. We may issue rights to our stockholders to purchase shares of our common stock and/or any of the other securities offered hereby. Each series of rights will be issued under a separate rights agreement to be entered into between us and a bank or trust company, as rights agent. When we issue rights, we will provide the specific terms of the rights and the applicable rights agreement in a prospectus supplement. Because the terms of any rights we offer under a prospectus supplement may differ from the terms we describe below, you should rely solely on information in the applicable prospectus supplement if that summary is different from the summary in this prospectus. We will incorporate by reference into the registration statement of which this prospectus is a part the form of rights agreement that describes the terms of the series of rights we are offering before the issuance of the related series of rights. The applicable prospectus supplement relating to any rights will describe the terms of the offered rights, including, where applicable, the following:

Holders may exercise rights as described in the applicable prospectus supplement. Upon receipt of payment and the rights certificate properly completed and duly executed at the corporate trust office of the rights agent or any other office indicated in the prospectus supplement, we will, as soon as practicable, forward the securities purchasable upon exercise of the rights. If less than all of the rights issued in any rights offering are exercised, we may offer any unsubscribed securities directly to persons other than stockholders, to or through agents, underwriters or dealers or through a combination of such methods, including pursuant to standby underwriting arrangements, as described in the applicable prospectus supplement.

DESCRIPTION OF UNITS

We may issue units comprising two or more securities described in this prospectus in any combination. For example, we might issue units consisting of a combination of debt securities and warrants to purchase common stock. The following description sets forth certain general terms and provisions of the units that we may offer pursuant to this prospectus. The particular terms of the units and the extent, if any, to which the general terms and provisions may apply to the units so offered will be described in the applicable prospectus supplement.

Each unit will be issued so that the holder of the unit also is the holder of each security included in the unit. Thus, the unit will have the rights and obligations of a holder of each included security. Units will be issued pursuant to the terms of a unit agreement, which may provide that the securities included in the unit may not be held or transferred separately at any time or at any time before a specified date. A copy of the forms of the unit agreement and the unit certificate relating to any particular issue of units will be filed with the SEC each time we issue units, and you should read those documents for provisions that may be important to you. For more information on how you can obtain copies of the forms of the unit agreement and the related unit certificate, see “Where You Can Find More Information.”

The prospectus supplement relating to any particular issuance of units will describe the terms of those units, including, to the extent applicable, the following:

PLAN OF DISTRIBUTION

We may sell the securities from time to time, by a variety of methods, including the following:

The securities may be distributed from time to time in one or more transactions:

Offers to purchase the securities being offered by this prospectus may be solicited directly. Agents may also be designated to solicit offers to purchase the securities from time to time. Any agent involved in the offer or sale of our securities will be identified in a prospectus supplement.

If a dealer is utilized in the sale of the securities being offered by this prospectus, the securities will be sold to the dealer, as principal. The dealer may then resell the securities to the public at varying prices to be determined by the dealer at the time of resale.

If an underwriter is utilized in the sale of the securities being offered by this prospectus, an underwriting agreement will be executed with the underwriter at the time of sale and the name of any underwriter will be provided in the prospectus supplement that the underwriter will use to make resales of the securities to the public. In connection with the sale of the securities, we, or the purchasers of securities for whom the underwriter may act as agent, may compensate the underwriter in the form of underwriting discounts or commissions. The underwriter may sell the securities to or through dealers, and those dealers may receive compensation in the form of discounts, concessions or commissions from the underwriters and/or commissions from the purchasers for which they may act as agent. Unless otherwise indicated in a prospectus supplement, an agent will be acting on a best efforts basis and a dealer will purchase securities as a principal, and may then resell the securities at varying prices to be determined by the dealer.

Any compensation paid to underwriters, dealers or agents in connection with the offering of the securities, and any discounts, concessions or commissions allowed by underwriters to participating dealers will be provided in

the applicable prospectus supplement. Underwriters, dealers and agents participating in the distribution of the securities may be deemed to be underwriters within the meaning of the Securities Act, and any discounts and commissions received by them and any profit realized by them on resale of the securities may be deemed to be underwriting discounts and commissions. In compliance with the guidelines of the Financial Industry Regulatory Authority, Inc., or FINRA, the maximum amount of underwriting compensation, including underwriting discounts and commissions, to be paid in connection with any offering of securities pursuant to this prospectus may not exceed 8% of the aggregate principal amount of securities offered. We may enter into agreements to indemnify underwriters, dealers and agents against civil liabilities, including liabilities under the Securities Act, or to contribute to payments they may be required to make in respect thereof and to reimburse those persons for certain expenses.

The securities may or may not be listed on a national securities exchange. To facilitate the offering of securities, certain persons participating in the offering may engage in transactions that stabilize, maintain or otherwise affect the price of the securities. This may include over-allotments or short sales of the securities, which involve the sale by persons participating in the offering of more securities than were sold to them. In these circumstances, these persons would cover such over-allotments or short positions by making purchases in the open market or by exercising their over-allotment option, if any. In addition, these persons may stabilize or maintain the price of the securities by bidding for or purchasing securities in the open market or by imposing penalty bids, whereby selling concessions allowed to dealers participating in the offering may be reclaimed if securities sold by them are repurchased in connection with stabilization transactions. The effect of these transactions may be to stabilize or maintain the market price of the securities at a level above that which might otherwise prevail in the open market. These transactions may be discontinued at any time.

If indicated in the applicable prospectus supplement, underwriters or other persons acting as agents may be authorized to solicit offers by institutions or other suitable purchasers to purchase the securities at the public offering price set forth in the prospectus supplement, pursuant to delayed delivery contracts providing for payment and delivery on the date or dates stated in the prospectus supplement. These purchasers may include, among others, commercial and savings banks, insurance companies, pension funds, investment companies and educational and charitable institutions. Delayed delivery contracts will be subject to the condition that the purchase of the securities covered by the delayed delivery contracts will not at the time of delivery be prohibited under the laws of any jurisdiction in the United States to which the purchaser is subject. The underwriters and agents will not have any responsibility with respect to the validity or performance of these contracts.

We may engage in at-the-market offerings into an existing trading market in accordance with rule 415(a)(4) under the Securities Act. In addition, we may enter into derivative transactions with third parties, or sell securities not covered by this prospectus to third parties in privately negotiated transactions. If the applicable prospectus supplement so indicates, in connection with those derivatives, the third parties may sell securities covered by this prospectus and the applicable prospectus supplement, including in short sale transactions. If so, the third party may use securities pledged by us, or borrowed from us or others to settle those sales or to close out any related open borrowings of common stock, and may use securities received from us in settlement of those derivatives to close out any related open borrowings of our common stock. In addition, we may loan or pledge securities to a financial institution or other third party that in turn may sell the securities using this prospectus and an applicable prospectus supplement. Such financial institution or other third party may transfer its economic short position to investors in our securities or in connection with a concurrent offering of other securities.

The underwriters, dealers and agents may engage in transactions with us, or perform services for us, in the ordinary course of business for which they receive compensation.

LEGAL MATTERS

Unless otherwise indicated in the applicable prospectus supplement, certain legal matters in connection with the offering and the validity of the securities offered by this prospectus, and any supplement thereto, will be passed upon by O’Melveny  & Myers LLP.

EXPERTS

The consolidated financial statements of Sonim Technologies, Inc. incorporated in this Registration Statement on Form S-3 by reference from Sonim Technologies, Inc.’s Annual Report on Form 10-K for the year ended December 31, 2020 have been audited by Moss Adams LLP, an independent registered public accounting firm, as set forth in their report which is incorporated by reference herein. Such consolidated financial statements have been so incorporated in reliance upon the report of such firm given upon their authority as experts in accounting and auditing.

Sonim Technologies, Inc.

$50,000,000

20,833,333 Shares of Common Stock

Preferred Stock

Debt Securities

Warrants

Rights

Units

PROSPECTUS

                                  , 2023

We have entered into indemnification agreements with each of our directors and executive officers. In general, these agreements provide thatofficers, whereby we willhave agreed to indemnify the director or executive officerour directors and officers to the fullest extent permitted by law, for claimsincluding indemnification against expenses and liabilities incurred in legal proceedings to which the director or officer was, or is threatened to be made, a party by reason of the fact that such director or officer is or was a director, officer, employee, or agent of Sonim, provided that such director or officer acted in good faith and in a manner that the director or officer reasonably believed to be in, or not opposed to, the best interest of Sonim.

We maintain insurance policies that indemnify our directors and officers against various liabilities arising under the Exchange Act, that might be incurred by any director or officer in his or her capacity as a director or officer or in connection with his or her service at our request for another corporation or entity.such.

The indemnification rights set forth above shall not be exclusiveforegoing summaries are subject to the complete text of any other right which an indemnified person may have or hereafter acquire under any statute, provision ofthe DGCL and our amended and restated certificate of incorporation ourand amended and restated bylaws agreement, vote of stockholders or disinterested directors or otherwise.

We maintain standard policies of insurance that provide coverage (1) to our directors and officers against loss rising from claims madeare qualified in their entirety by reason of breach of duty or other wrongful act and (2) to us with respect to indemnification payments that we may make to such directors and officers.reference thereto.

A list of exhibits included as part of this registration statement is set forth in the Exhibit Index and is incorporated herein by reference.

Item 16. Exhibits.

Item 17. Undertakings.

The undersigned registrant hereby undertakes:

(1)

(i) To include any prospectus required by Section 10(a)(3) of the Securities Act of 1933;

(ii) To reflect in the prospectus any facts or events arising after the effective date of the registration statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in the registration statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed provided, however, that which was registered) and any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the SEC pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than a 20% change in the maximum aggregate offering price set forth in the “Calculation of Registration Fee” table in the effective registration statement; and

(iii) To include any material information with respect to the plan of distribution not previously disclosed in the registration statement or any material change to such information in the registration statement;

provided, however, that clauses paragraphs (1)(i), (1)(ii) and (1)(iii) above do not apply if the information required to be included in a post-effective amendment by those clausesparagraphs is contained in reports filed with or furnished to the SEC by the registrant pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934, as amended, that are incorporated by reference in this registration statement, or is contained in a form of prospectus filed pursuant to Rule 424(b) that is a part of this registration statement;

(2) That for the purpose of determining any liability under the Securities Act of 1933, each such post-effective amendment will be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof;

(3) To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering;

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(4) That, for the purpose of determining liability under the Securities Act of 1933 to any purchaser, each prospectus filed by the registrant pursuant to Rule 424(b)(3) shall be deemed to be part of the registration statement as of the date the filed prospectus was deemed part of and included in the registration statement; and each prospectus required to be filed pursuant to Rule 424(b)(2), (b)(5), or (b)(7) as part of a registration statement in reliance on Rule 430B relating to an offering made pursuant to Rule 415(a)(1)(i), (vii) or (x) for the purpose of providing the information required by Section 10(a) of the Securities Act of 1933 shall be deemed to be part of and included in the registration statement as of the earlier of the date such form of prospectus is first used after effectiveness or the date of the first contract of sale of securities in the offering described in the prospectus. As provided in Rule 430B, for liability purposes of the issuer and any person that is at that date an underwriter, such date shall be deemed to be a new effective date of the registration statement relating to the securities in the registration statement to which that prospectus relates, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof. Provided, however, that no statement made in a registration statement or prospectus that is part of the registration statement or made in a document incorporated or deemed incorporated by reference into the registration statement or prospectus that is part of the registration statement will, as to a purchaser with a time of contract of sale prior to such effective date, supersede or modify any statement that was made in the registration statement or prospectus that was part of the registration statement or made in any such document immediately prior to such effective date; and

(5) That, for the purpose of determining liability of the registrant under the Securities Act of 1933 to any purchaser in the initial distribution of the securities, the undersigned registrant undertakes that in a primary offering of securities of the undersigned registrant pursuant to this registration statement, regardless of the underwriting method used to sell the securities to the purchaser, if the securities are offered or sold to such purchaser by means of any of the following communications, the undersigned registrant will be a seller to the purchaser and will be considered to offer or sell such securities to such purchaser:

(i) any preliminary prospectus or prospectus of the undersigned registrant relating to the offering required to be filed pursuant to Rule 424;

(ii) any free writing prospectus relating to the offering prepared by or on behalf of the undersigned registrant or used or referred to by the undersigned registrant;

(iii) the portion of any other free writing prospectus relating to the offering containing material information about the undersigned registrant or its securities provided by or on behalf of the undersigned registrant; and

(iv) any other communication that is an offer in the offering made by the undersigned registrant to the purchaser.

The undersigned registrant hereby further undertakes:

(1) That for purposes of determining any liability under the Securities Act of 1933, each filing of the registrant’s annual report pursuant to Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934 (and, where applicable, each filing of an employee benefit plan’s annual report pursuant to Section 15(d) of the Securities Exchange Act of 1934) that is incorporated by reference in the registration statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof;

(2) Insofar as indemnification for liabilities arising under the Securities Act of 1933 may be permitted to directors, officers and controlling persons of the registrant pursuant to the foregoing provisions, or otherwise, the registrant has been advised that in the opinion of the SEC such indemnification is against public policy as expressed in the Securities Act of 1933 and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the registrant of expenses incurred or paid by a director, officer or controlling person of the registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the

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securities being registered, the registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question of whether such indemnification by it is against public policy as expressed in the Securities Act of 1933 and will be governed by the final adjudication of such issue; and

(3) To file an application for the purpose of determining the eligibility of the trustee to act under subsection (a) of Section 310 of the Trust Indenture Act in accordance with the rules and regulations prescribed by the Commission under Section 305(b)(2) of the Trust Indenture Act.

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EXHIBIT INDEXstatement.

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SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, as amended, the Registrantregistrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-3 and has duly caused this Registration Statementregistration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Austin,Scottsdale, State of Texas,Arizona, on March 18, 2021.December 1, 2023.

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POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below herebyseverally constitutes and appoints Peter Liu and Clayton Crolius, and each of Thomas W. Wilkinsonthem, and Robert Tirva, or either of them, each acting alone,as his or her true and lawful attorney-in-fact and agent,attorneys-in-fact, each with fullthe power of substitution and re-substitution,resubstitution, for such person and in hishim or her name, place and stead, in any and all capacities, in connection with the Registrant’s Registration Statement on Form S-3 under the Securities Act of 1933, as amended, or the Securities Act,to sign any and all pre-effective and post-effective amendments to this Registration Statement, and any Registration Statement filed pursuant to Rule 413registration statement on Form S-3 or Rule 462 under the Securities Act,other applicable form and to file or cause to be filed the same, with all exhibits thereto and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, singly, full power and authority to do and perform each and every act and thing requisite and necessary to be done in and aboutorder to effectuate the foregoing,same as fully, and to all intents and purposes, as eachthey or he or she might or could do in person, hereby ratifying and confirming all that each of said attorneys-in-fact and agents,attorney-in-fact, or their substitute or substitutes, may lawfully do or cause to be done by virtue of this Power of Attorney.hereof.

Pursuant to the requirements of the Securities Act of 1933, this registration statement has been signed by the following persons in the capacities and on the datesdate indicated.

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