T-Mobile US (TMUS) 8-K T-Mobile Completes Merger with Sprint to Create the NewT-Mobile

Exhibit 99.1

T-Mobile Completes Merger with Sprint to Create the NewT-Mobile

SuperchargedUn-carrier positioned to deliver unparalleled network reliability, value, innovation and commitment to customers now, when it’s more important than ever

CEO transition occurs with close of merger; John Legere hands off CEO role to Mike Sievert

Bellevue, Washington and Overland Park, Kansas — April 1, 2020—T-Mobile US, Inc. (NASDAQ: TMUS) announced today that it has officially completed its merger with Sprint Corporation to create the NewT-Mobile, a superchargedUn-carrier that will deliver a transformative 5G network. The parent of the combined company isT-Mobile US, Inc., whose shares of common stock will continue to trade on the NASDAQ Global Select Market under the symbol “TMUS”. The combined company will operate under the nameT-Mobile.

The NewT-Mobile’s commitment to building the world’s best broad and deep nationwide 5G network, which will bring lightning-fast speeds to urban areas and underserved rural communities alike, is more critical than ever, as reliable connectivity has become so important to Americans. With 14 times more capacity in six years than standaloneT-Mobile has today, the NewT-Mobile network will be able to offer unmatched value to consumers, with better service at lower prices. The company will also continue to focus on its commitment to customers and being a force for good. The enhanced scale and financial strength of the combined company will drive a planned investment of $40 billion into its network, business and more over the next three years. Synergies achieved from the integration have the potential to unlock massive scale and unleash at least $43 billion in value for shareholders.

The company also announced that with close of the merger, it has successfully completed its long-planned Chief Executive Officer transition from John Legere to Mike Sievert ahead of schedule. Effective immediately, Sievert will assume the role of CEO ofT-Mobile. Legere, who served as CEO ofT-Mobile since 2012, built a culture around listening to employees, putting the customer first and shaking up the market with signatureUn-carrier moves. During his tenure, Legere engineered a turnaround of the company asT-Mobile completely disrupted the wireless industry and became the fastest growing company in wireless, capturing 80% of the industry’s postpaid phone growth from 2013 to today. Legere will continue as a member of the Board of Directors for the remainder of his current term, through the Annual Meeting of Shareholders scheduled in June 2020.

“During this extraordinary time, it has become abundantly clear how vital a strong and reliable network is to the world we live in. The NewT-Mobile’s commitment to delivering a transformative broad and deep nationwide 5G network is more important and more needed than ever and what we are building is mission-critical for consumers,” said Mike Sievert, president and CEO ofT-Mobile. “With this powerful network, the NewT-Mobile will deliver real choice and value to wireless and home broadband customers and double down on all the things customers have always loved about theUn-carrier.T-Mobile has been changing wireless for good — and now we are going to do it on a whole new level!”

Sievert continued, “All of us atT-Mobile owe John an incredible thank you for everything he’s done to get this company to where we are today. He has changed what it means to be a CEO. Everything thatT-Mobile has accomplished is the result of his vision for what a different kind of wireless provider could be. John IS what theUn-carrier is all about: advocating for customers at every turn, forcing us to think differently and always driving for more. He has always pushed the boundaries of what’s possible and pushed us to do the same. His leadership has made us what we are today, and we will take that into the future. Thank you, John, for everything you’ve done for wireless consumers and for our beloved employees! I also want to thank Marcelo Claure and the entire Sprint leadership team for their hard work to get us to this huge day! We did it!... and I’m looking forward to welcoming Sprint employees into Team Magenta, and to working with you now as a member of our Board of Directors.”

“TheUn-carrier movement started withT-Mobile saying we were going to shake up wireless — and we did! We eliminated annual service contracts, overages and roaming fees, improved customer service and introduced more value. But there’s more. In the best and worst of times,T-Mobile has been here with a dependable network and giving customersbest-in-class customer service they can depend on. Today, when those connections are needed more than ever, we are reinforcing everything we’ve stood for as the supercharged NewT-Mobile!” said John Legere. “You knowT-Mobile has been all about challenging the status quo … and Sprint has a track record of being a tenacious challenger and a dedicated customer advocate as well. So, with innovation, disruption and obsession for the customer experience as the foundation that the NewT-Mobile is built on, just imagine what’s to come.”

Legere continued, “I’ve been fortunate enough to lead this company for the past seven years, but now it’s time for me to hand the reins over to Mike Sievert. The Board of Directors and I agree that it makes perfect sense for Mike to assume his leadership role on day one of the new company. He’s ready! I had originally planned to stay on through the end of my contract on April 30, 2020, but it makes much more sense to transition this responsibility to Mike today. Mike was the first person I hired atT-Mobile and I have tremendous faith in his ability to take theUn-carrier into its next SUPERCHARGED chapter. Between his leadership, his expanded and talented leadership team and the amazing people atT-Mobile, the future is SO bright! TheUn-carrier that we created started with our employees. Each and every one of them. They are different. They play the game differently, and I love them all. I cannot wait to see what this entire team does next!”

THE WORLD’S MOST TRANSFORMATIVE NETWORK

Strong, dependable network connectivity has never been more critical to customers or to the country. Now the NewT-Mobile will focus on creating a much-needed transformational nationwide 5G network, driving innovation in the U.S. and bringing wireless access to people throughout the country. This quantum leap forward can only be achieved by usingT-Mobile and Sprint’s combinedlow-,mid- and high-spectrum bands — and only the NewT-Mobile will have the resources to do it quickly.

• The network will have14 times more capacity in the next six years thanT-Mobile alone has today, enabling the NewT-Mobile to leapfrog the competition in network capability and experience.

• Customers will have access toaverage 5G speeds up to eight times faster than current LTE in just a few years and15 times faster over the next six years.

• Within six years, the New T-Mobile will provide5G to 99% of the U.S. population and average5G speeds in excess of 100 Mbps to 90% of the U.S. population.

• NewT-Mobile’s business plan is built oncovering 90% of rural Americans with average 5G speeds of 50 Mbps, up to two times faster than broadband on average.

“The network is at the core of everything we do as a business, and it’s critically important for keeping customers connected to each other, their communities and the world,” said Neville Ray, president of Technology atT-Mobile. “The supercharged 5G network that we’ll build as a combined company will be a huge step forward, transforming wireless, fueling innovation and delivering new experiences for customers all across the country that we can’t even imagine today.”

BETTER PRODUCTS AT LOWER PRICES

With 14 times more total capacity in the next six years thanT-Mobile has today, customers won’t have to choose between great service or low prices — they’ll get both. The NewT-Mobile will offer free access to 5G and the best rate plans at low prices, now and in the future, so all customers can reap the benefits of a superchargedUn-Carrier network at a great value. And the NewT-Mobile has committed to delivering the same or better rate plans for three years, which includes access to 5G, including for prepaid and Lifeline customers.

Backed by that additional capacity, the NewT-Mobile is also taking the fight beyond wireless. By offering an alternative toin-home broadband, theUn-carrier will provide much-needed competition in home internet to Big Cable, at a time when just under half of the country’s households have only one or zero options for high-speed broadband. The New T-Mobile’s wirelessin-home broadband service will overcome the obstacles to extending traditional wireline access by blanketing high-capacity coverage over previously difficult to serve areas. Its network will deliver 100+ Mbps speeds for wireless broadband to 90% of the population and offerin-home service to millions of the country’s households in the next six years.

A BRAND THAT CUSTOMERS LOVE

NewT-Mobile will capitalize on the winning formula it built and double down on what customers love about the brand. It will also continue to be a force for good, pledging not only to be a bigger company but also abetter company. NewT-Mobile customers should expect everything theUn-carrier has ALWAYS stood for: treating customers right, shaking up the status quo and being a force for good. The company will use its network to lift up communities nationwide and bring the benefits of 5G to as many Americans as possible, and it will continue supporting the programs and causes that matter most to employees and the communities they serve.

It began with theT-Mobile Connect plan. To address America’s urgent needs aroundCOVID-19,T-Mobile fast-tracked its groundbreaking, lowest-priced plan EVER, launched on March 23. Other initiatives to bring the NewT-Mobile’s newly expanded network capabilities to the customers and communities that can benefit most will launch soon, including the Connecting Heroes Initiative to offer FREE unlimited talk, text and smartphone data to ALL first responders at ALL public and nonprofit state and local fire, police and EMS agencies; and Project 10Million, delivering free internet access and hardware to 10 million households over the next five years.

NewT-Mobile customers will also receive industry-leading customer care, and all post-paid customers will have access toT-Mobile’s award-winning Team of Experts (TEX) model as it expands into every current and planned customer experience center.

MASSIVE VALUE-CREATION OPPORTUNITY

The combined assets ofT-Mobile and Sprint are so complementary that the merger is expected to unlock at least $43 billion in synergies for all shareholders. The vast majority of synergies in this deal come from combining networks, such as reducing redundant cell sites and rapidly deploying spectrum and other technologies more efficiently. The company plans to deliver a seamless, high-quality integration, just as it did with its MetroPCS merger, which was completed a year earlier than planned. These synergies and our combined scale are expected to put NewT-Mobile in an enhanced financial position, including significant free-cash flow, margin expansion and strong, flexible capital structure.

Under the terms of the transaction, Sprint shareholders will receive a fixed exchange ratio of 0.10256T-Mobile shares for each Sprint share, or the equivalent of approximately 9.75 Sprint shares for eachT-Mobile share. As previously announced, per a separate arrangement, SoftBank Group Corp. surrendered approximately 48.8 millionT-Mobile shares acquired in the merger to NewT-Mobile immediately following the closing of the transaction, making SoftBank’s effective ratio 11.31 Sprint shares perT-Mobile share.

Effective at the beginning of today’s trading session,T-Mobile will trade on the NASDAQ on a combined basis under the ticker symbol “TMUS.” The Sprint shares will no longer trade on the New York Stock Exchange.

PJT Partners and Goldman Sachs acted as financial advisors toT-Mobile. Wachtell, Lipton, Rosen & Katz provided legal counsel toT-Mobile and Deutsche Telekom. Evercore acted as financial advisor to the committee of independent directors ofT-Mobile and Latham & Watkins provided legal counsel to the committee of independent directors. Morgan Stanley served as a financial advisor to Deutsche Telekom.

The Raine Group LLC acted as lead financial advisor to Sprint. J.P. Morgan also acted as a financial advisor to Sprint. Morrison & Foerster LLP provided legal counsel to Sprint and SoftBank.

AboutT-Mobile

T-Mobile U.S. Inc. (NASDAQ: TMUS) is America’s superchargedUn-carrier, delivering an advanced 4G LTE and transformative nationwide 5G network that will offer reliable connectivity for all.T-Mobile’s customers benefit from its unmatched combination of value and quality, unwavering obsession with offering them the best possible service experience and undisputable drive for disruption that creates competition and innovation in wireless and beyond. Based in Bellevue, Wash.,T-Mobile provides services through its subsidiaries and operates its flagship brands,T-Mobile, Metro byT-Mobile and Sprint. For more information please visit:http://www.t-mobile.com.

Cautionary Statement Regarding Forward-Looking Statements

This communication contains certain forward-looking statements concerningT-Mobile. All statements, other than statements of historical fact, including information concerning future results and performance, are forward-looking statements. These forward-looking statements may be identified by the words “anticipate,” “believe,” “estimate,” “expect,” “intend,” “may,” “could” or similar expressions. Such forward-looking statements include, but are not limited to, statements about the benefits of the business combination with Sprint Corporation (“Sprint”), including anticipated future financial and operating results, synergies, accretion and growth rates, andT-Mobile’s plans, objectives, expectations and intentions. There are several factors that could cause actual plans and results to differ materially from those expressed or implied in forward-looking statements. Such factors include, but are not limited to, adverse economic, political or market conditions in the U.S. and international markets and other factors such as natural disasters, pandemics and outbreaks of contagious diseases and other adverse public health developments, such asCOVID-19; the risk that the conditions imposed in connection with the regulatory approvals for the business combination, including the divestiture of Sprint’s Boost Mobile and Sprint prepaid wireless brands and certain other assets to DISH Network Corporation and ongoing commercial and transition services arrangements to be entered into in connection with such divestiture, could adversely affectT-Mobile and/or the expected benefits of the business combination; the ability ofT-Mobile to make payments on debt or to repay existing or future indebtedness when due or to comply with the covenants contained therein; adverse changes in the ratings ofT-Mobile’s debt securities or adverse conditions in the credit markets; negative effects of the business combination on the market price ofT-Mobile’s common stock and onT-Mobile’s operating results, including as a result of changes in key customer, supplier, employee or other business relationships; the incurrence of significant costs and/or assumption of significant liabilities in connection with the business combination; failure to realize the expected benefits and synergies of the business combination in the expected timeframes or at all; costs or difficulties related to the integration of Sprint’s network, operations and financial reporting and internal controls intoT-Mobile, including the effects of any material weakness or significant deficiencies in Sprint’s internal controls over financial reporting; the risk of litigation or regulatory actions, including litigation or actions that may arise fromT-Mobile’s consummation of the business combination during the pendency of the California Public Utility Commission’s review of the business combination; the inability ofT-Mobile to retain and hire key personnel; effects of changes in the regulatory environment in whichT-Mobile operates; changes in global, political, economic, business, competitive and market conditions; changes in tax and other laws and regulations; challenges in implementingT-Mobile’s business strategies or funding its operations; breaches ofT-Mobile’s and/or its third-party vendors’ networks, information technology and data security, resulting in unauthorized access to customer confidential information; natural disasters, pandemics or public health crises, including the impact of coronavirus, terrorist attacks or similar incidents; and other risks and uncertainties detailed inT-Mobile’s Annual Report on Form10-K for the fiscal year ended December 31, 2019 and in its subsequent reports on Form10-Q, including in the sections thereof captioned “Risk Factors” and “Cautionary Statement Regarding Forward-Looking Statements,” as well as in its subsequent reports on Form8-K, all of which are filed with the SEC and available at www.sec.gov andwww.t-mobile.com. Forward-looking statements are based on current expectations and assumptions, which are subject to risks and uncertainties that may cause actual results to differ materially from those expressed in or implied by such forward-looking statements. Given these risks and uncertainties, persons reading this communication are cautioned not to place undue reliance on such forward-looking statements.T-Mobile assumes no obligation to update or revise the information contained in this communication (whether as a result of new information, future events or otherwise), except as required by applicable law.