THE SECURITIES  REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE SECURITIES
ACT OF 1933 ("ACT").  ANY TRANSFER OF SUCH  SECURITIES  WILL BE INVALID UNLESS A
REGISTRATION  STATEMENT UNDER THE ACT IS IN EFFECT AS TO SUCH TRANSFER OR IN THE
OPINION OF COUNSEL FOR THE COMPANY  REGISTRATION UNDER THE ACT IS UNNECESSARY IN
ORDER FOR SUCH TRANSFER TO COMPLY WITH THE ACT.

                    World Wide Wireless Communications, Inc.

                         CONVERTIBLE UNSECURED DEBENTURE

$740,000                                                      SEPTEMBER 30, 1999


                  FOR VALUE  RECEIVED,  subject to the terms and  conditions set
forth below, World Wide Wireless Communications, Inc., a Nevada corporation (the
"Company"),  whose address is 520 Third Street,  Suite 101, Oakland,  California
hereby  promises  to pay to the order of  Credit  Bancorp,  Netherland  Antilles
Corporation,  (the  "Payee"),  the principal sum of SEVEN HUNDRED FORTY THOUSAND
DOLLARS ($740,000),  together with interest on the outstanding principal balance
remaining  unpaid from time to time from and after the date hereof until paid in
full at the rate of  seven  percent  (7%) per  annum,  payable  semiannually  in
arrears  on the last day of each  February  and each  September  30,  commencing
September  30, 1999 and on the  maturity  date  hereof,  computed on actual days
elapsed in a 365 day year. The outstanding principal balance,  together with all
accrued and unpaid interest, will be due and payable on September 30, 2002.


                All payments on account of principal  and interest  will be made
in lawful money of the United  States of America to the address of the Payee set
forth on the  Schedule of  Purchasers  attached to the  Purchase  Agreement  (as
defined  herein),  or at such other place as the holder  hereof may from time to
time designate in writing to the Company.

                The Payee and each subsequent holder or holders hereof (any such
person being  referred to herein as the "Holder" and all holders being  referred
to herein  as  "Holders")  by  acceptance  of the  Debenture  each  agree to the
following terms and conditions:

                                        1



1. PRINCIPAL PAYMENTS.

   1.1.     Pro Rata Payments. Any and all payments under the Debenture, whether
            at the election of the Company,  upon maturity or following an Event
            of Default  (as  defined in Section  3), will be made by the Company
            prorata to all Holders.

   1.2.     Optional Prepayments.  The Company may prepay the Debenture in whole
            or in part without penalty. Prepayments will be applied first toward
            repayment  of  accrued  interest  first,  and any  amount  remaining
            thereafter  toward the  repayment of  principal.  If a prepayment is
            made  other  than on a dat  when  interest  payments  are  due,  the
            semi-annual  interest payment for the period in which the prepayment
            was made will be  prorated  through the date of  prepayment.  If the
            Holder  has  exercised  its  right  to  convert  some  or all of the
            principal or interest into Common Stock before  payment is made, the
            Company may not prepay those amounts but, instead, will issue shares
            of Common  Stock for the amount  converted in  accordance  with this
            Debenture.

   1.3.     Procedures.  Upon receipt of any prepayment of principal, the Holder
            will promptly  endorse and surrender  this  Debenture to the Company
            for  cancellation.  If the Company  prepays  some but not all of the
            principal,  the Company will without  charge to the Holder  promptly
            execute and deliver to the Holder a debenture for the unpaid balance
            of the principal. Following the date of prepayment, interest will be
            payable only on the portion of the principal which was not prepaid.

2. CONVERTIBILITY.

   2.1.     Right to Convert.  Subject to the provisions of this Debenture,  all
            amounts of unpaid  principal  and accrued  interest are  convertible
            into Common Stock at any time at the election of the Holder.

   2.2.     Conversion - Public  Offering.  All amounts of unpaid  principal and
            interest will be converted following five (5) days notice thereof to
            the Company,  into Common Stock of the Company (the "Common  Stock")
            at a conversion price of $1.60 per share (the  "Conversion  Price").
            The  Conversion  Price will be subject to  adjustments  pursuant  to
            Section 2.6.

   2.3.     Mechanics of Conversion.  This Debenture may be converted in full or
            in part by the Holder,  pursuant to Section 2.1-2.2, by surrender of
            this Debenture to the Company at the address set forth

                                        2



            above,  with a notice of  conversion in the form of Exhibit A hereto
            duly executed by the Holder (specifying the portion of the principal
            amount and the accrued and unpaid interest,  if any, to be converted
            in the case of a partial conversion).

            2.3.1. Surrender  of  Debenture.  To convert any amount  owing under
                   this Debenture  into Common Stock,  the Holder must surrender
                   this  Debenture  at the  principal  executive  office  of the
                   Company,  accompanied  by a written  notice setting forth the
                   amount of principal  and interest  being  converted.  If less
                   than the entire  principal  is being  converted,  the Company
                   will  issue to the  Holder a  replacement  Debenture  setting
                   forth the amount of unpaid principal and otherwise containing
                   the same terms and conditions as this Debenture.

            2.3.2. Issuance of Shares.  Following compliance with the procedures
                   set forth in Section  2.3.1,  the  Company  will issue to the
                   Holder a  certificate  evidencing  the  number  of  shares of
                   Common Stock to which the Holder is entitled.

            2.3.3. Fractional  Shares. In lieu of issuing any fractional shares,
                   the Company may at its option pay to the Holder cash equal to
                   the market  price for the shares if there is a public  market
                   for the Common Stock.

   2.4.     Early Termination of Conversion  Option.  The right of the Holder to
            convert any interest or principal  into Common Stock will  terminate
            immediately,   notwithstanding   the  fact  that  such  right  could
            otherwise  be  exercised,   two  (2)  business  days  prior  to  the
            occurrence  of any of the  following  events  (hereafter  defined as
            "Events"):

            (i)    the merger or consolidation  of the  Corporation,  whether or
                   not  the  Corporation  is  the  surviving   entity,   if  the
                   beneficial owners of the outstanding voting securities of the
                   Corporation  immediately prior to the merger or consolidation
                   as a group are the beneficial  owners of less than 50% of the
                   surviving entity's outstanding voting securities  immediately
                   after the merger or consolidation;

            (ii)   the sale, exchange or transfer of all or substantially all of
                   the assets of the Issuer other than in the ordinary course of
                   business; or

            (iii)  the dissolution or liquidation of the Issuer.

                                        3



            The  Company  will  provide  the Holder  with notice of any Event no
            later than ten (10)  business  days  before that Event  occurs.  The
            right of the Holder to convert  principal  or  interest  into Common
            Stock will not be  canceled  if the party  acquiring  the  Company's
            stock or assets was an affiliate of the Company immediately prior to
            an Event or is a person,  group or other entity  which  beneficially
            owned more than twenty  percent  (20%) of the  Issuer's  outstanding
            voting securities immediately prior to that Event.

   2.5.     Adjustments to Conversion  Price. The Conversion Price will be $1.60
            per share  subject  to an  adjustment  in the case of stock  splits,
            reverse stock splits,  stock dividends,  or the  reclassification of
            securities.

            2.5.1. Notice of Adjustment.  Whenever the  Conversion  Price or the
                   number of shares of Common Stock issuable upon  conversion of
                   the  Debenture  will be adjusted as provided in this  Section
                   2.5, the Company will forthwith file, at its principal office
                   or at such other place as may be designated by the Company, a
                   statement,  signed by its chief  executive  officer  or chief
                   financial officer, showing in detail the facts requiring such
                   adjustment  and the  Conversion  Price  and/or  the number of
                   shares  of  Common  Stock  issuable  upon  Conversion  of the
                   Debenture,  as the case may be, that will be in effect  after
                   such  adjustment.  The  Company  will  within  15 days of any
                   adjustment to the  Debentures  cause a copy of such statement
                   to be sent by  first-class,  certified  mail,  return receipt
                   requested,  postage prepaid,  to each Holder of Debentures at
                   such Holder's address appearing in the Company's records.

            2.5.2. Stock Splits and  Combinations.  In the event the outstanding
                   Common  Stock  will be  subdivided  into a greater  number of
                   shares of Common Stock,  the Current  Conversion  Price will,
                   simultaneously with the effectiveness of such subdivision, be
                   proportionately   reduced,   and  conversely,   in  case  the
                   outstanding  Common  Stock  will be  combined  into a smaller
                   number  of shares of Common  Stock,  the  Current  Conversion
                   Price will,  simultaneously  with the  effectiveness  of such
                   combination,  be proportionately  increased.  In addition, if
                   the Company  declares a stock dividend payable in the form of
                   common  stock,  the  conversion  price  will be reduced by an
                   amount  equal  to  the  percentage   increase  in  the  total
                   outstanding  shares of the company  resulting from that stock
                   dividend.

                                        4



            2.5.3. Reclassification  of  Securities.   In  the  event  that  the
                   Company's  Common  Stock is  reclassified  or  exchanged  for
                   another  type  or  class  of  security   without  payment  of
                   consideration  or otherwise  changed,  the Holder may convert
                   this  Debenture  into the same type and class of  security as
                   the holders of the Common Stock  received as a result of that
                   reclassification,  exchange or change.  The Conversion  Price
                   for such security will be proportionally  adjusted to reflect
                   the increase or decrease in the number of shares  outstanding
                   as a result of that reclassification, exchange or change.

   2.6.     Reservation of Stock. The Company will at all times reserve and keep
            available out of its authorized but unissued shares of Common Stock,
            solely for the purpose of effecting the  conversion of the principal
            amount and  accrued  and unpaid  interest  of this  Debenture,  such
            number  of  shares  of  Common  Stock as will  from  time to time be
            sufficient to effect such  conversion.  If at any time the number of
            authorized  but  unissued   shares  of  Common  Stock  will  not  be
            sufficient to effect such conversion, the Company promptly will take
            all such  corporate  action as will be necessary and  appropriate to
            increase such number to the number sufficient for such purpose.

3. SUBORDINATION.

   The right of the Holder to receive  payment of any  principal  or interest is
   subject  and  subordinate  to the prior  payment  of any  other  indebtedness
   currently  owed by or  hereafter  incurred  by the  Company  other  than  any
   indebtedness  currently or  hereafter  owed to any director or officer of the
   Company  (hereafter  "Senior  Indebtedness").  During the  continuance of any
   default in the payment of principal  or interest on any Senior  Indebtedness,
   no payment of principal  or interest  will be made on or with respect to this
   Debenture if written  notice of such default has been given to the Company by
   any  holder  or  holders  of any  Senior  Indebtedness.  In the  event of any
   insolvency,  bankruptcy,  receivership, or liquidation involving the Company,
   the holders of Senior  Indebtedness  will be  entitled to receive  payment in
   full of all  principal  and  interest on all Senior  Indebtedness  before the
   Holder will be entitled to receive any payment of principal or interest.

4. EVENTS OF DEFAULT.

   If any of the  following  events  occur  ("Events  of  Default"),  all unpaid
   principal and accrued interest will become immediately due and payable:

                                        5



            (i)    Voluntary  Bankruptcy.  The  Company  files  a  petition  for
                   bankruptcy;

            (ii)   Involuntary  Bankruptcy.  A creditor of the  Company  files a
                   petition for bankruptcy  with respect to the Company and that
                   petition  is not  discharged  within  90 days of the  date of
                   filing;

            (iii)  Assignment  for Benefit of  Creditors.  The Company  makes an
                   assignment  for the  benefit of  creditors  or a receiver  is
                   appointed with respect to the Company;

            (iv)   Dissolution.   The  Company   dissolves  or   commences   the
                   liquidation of its entire business; or

            (v)    Sale of Assets.  The Company sells,  assigns or transfers all
                   or substantially all of its assets other than in the ordinary
                   course of business,  provided  that it will not be considered
                   an Event of Default if the  purchaser of those assets  agrees
                   to assume all  obligations of the Company with respect to the
                   payment of principal and interest under this Debenture.

5. MISCELLANEOUS.

   5.1.     Securities Laws Compliance.  This Debenture and the shares of Common
            Stock to be  issued  hereunder  have not been  registered  under the
            Securities  Act of 1933 (the "Act")  pursuant to an exemption to the
            registration  requirements contained in Section 4(2) of the Act, nor
            have they been  registered or qualified  under any state  securities
            laws. The Compan reserves the right to condition the issuance of any
            shares  under this  Debenture  upon the receipt of such  information
            from the  Holder  so as to allow  the  Company  to  verify  that the
            exemption i available  as of the date of  conversion.  The Holder of
            this Debenture  acknowledges that it is acquiring this Debenture for
            investmen only and not with a view toward the resale or distribution
            of this  Debenture  or the Common  Stock  issuable  upon  conversion
            hereof.

   5.2.     Restrictive  Legend. Each certificate for the securities issued upon
            conversion of all or a portion of the  principal  amount and accrued
            and unpaid  interest of this  Debenture  and the Common Stock issued
            upon conversion thereof will bear a legend on its face substantially
            in the following form:

            THIS DEBENTURE AND THE SHARES TO BE ISSUED

                                        6



            HEREUNDER HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933,
            AS AMENDED.  THEY MAY NOT BE SOLD,  OFFERED  FOR SALE,  TRANSFERRED,
            PLEDGED OR HYPOTHECATED  IN THE ABSENCE OF A REGISTRATION  STATEMENT
            IN  EFFECT  WITH  RESPECT  TO THE  SECURITIES  UNDER  THAT ACT OR AN
            OPINION OF COUNSEL OR OTHER  EVIDENCE  SATISFACTORY  TO THE  COMPANY
            THAT  REGISTRATION  IS NOT REQUIRED OR UNLESS SOLD  PURSUANT TO RULE
            144 UNDER THE ACT.

   5.3.     Replacement. Upon receipt by the Company of evidence satisfactory to
            it of the loss,  theft,  destruction or mutilation of this Debenture
            (provided that an affidavit of the Holder will be  satisfactory  for
            such  purpose),  and  of  indemnity  satisfactory  to it,  and  upon
            surrender and  cancellation  of this  Debenture,  if mutilated,  the
            Company  will make and  deliver a new  Debenture  of like tenor in a
            principal amount equal to the outstanding  principal balance of this
            Debenture. Any Debenture so issued will be dated as of the last date
            at which principal or interest has been paid upon this Debenture.

   5.4.     Cancellation.  Upon  payment in full of all  principal  and interest
            payable  hereunder,  or in the event the Holder  converts the entire
            principal and interest amount hereof into Stock, this Debenture will
            be surrendered to the Company for cancellation.

   5.5.     Transferability of Debenture.  This Debenture may be sold, assigned,
            or otherwise  transferred,  provided that such transfer is conducted
            in accordance of Rule 144 of the Securities and Exchange Commission,
            is otherwise exempt from the registration requirements of the Act or
            if this Debenture is registered under the Act.

   5.6.     Governing  Law/Forum.   This  Agreement  will  be  governed  by  and
            construed  under the laws of the State of  California,  exclusive of
            any conflicts of laws  principles  which would apply the laws of any
            other jurisdiction.  The parties agree that any action to enforce or
            construe  this  Agreement  will be brough in the state courts in the
            County of San  Francisco,  State of  California,  or in the  Federal
            Courts of the Northern District of California. Each party waives all
            objections  to the bringing of such an action in that forum based on
            lack   of   personal   jurisdiction,   improper   venue   or   forum
            non-conveniens.

                                        7



   5.7.     Amendment  and Waiver.  Any provision of the Debenture ma be amended
            or  waived  by a writte  instrument  signed  by the  Company  and by
            Holders  of at  least  66-2/3  of  the  then  outstanding  aggregate
            principal  amount  of  Debentures,  such  amendment  or waiver to be
            effective  with  respect  to all of the  Debentures  but only in the
            specific  instance  and for  the  specific  purpose  for  which  the
            amendment or waiver is made or given; provided, however, tha no such
            amendment  or waiver will without the prior  written  consent of the
            Holders of all of the then outstanding aggregate principal amount of
            Debentures,  modify the principal amount, rate of interest, form and
            place of payment,  conversion or maturity of the  Debenture,  or the
            percentage required to effect amendment of the Debenture.

   5.8.     No Rights as a Shareholder.  This Debenture will not give the Holder
            any right to vote in any matter  submitted for  consideration by the
            shareholders or any other right of a shareholder of the company.

   5.9.     Market Standoff  Agreement.  The Compan and the  Shareholders  agree
            that, in connection  with any public offering of the Company's stock
            (regardless  of  whether  the  offering  is  registered   under  the
            Securities  Act of 1933,  as  amended  (the  "Act") or  exempt  from
            registration) the Shareholders will not sell or otherwise dispose of
            any of their Stoc without the prior  written  consent of the Company
            or the  underwriter  dispose of any of their Stock without the prior
            written  consen  of the  Company  or the  underwriter  may  specify;
            provided  that  such  period  will not  exceed  180 days  after  the
            completion of the offering.

   5.10.    Waiver.  No delay on the part of the Holder in exercising  any right
            hereunder  will  operate  as a  waiver  of  such  right  under  this
            Debenture.

   5.11.    Presentment.  Presentment,  protest,  notice of  protest,  notice of
            dishonor,  and notice of  nonpayment  are waived by the Company with
            respect to any amounts due  hereunder,  and any rights to direct the
            Company  hereunder,  and any  right t  require  proceedings  against
            others or to require exhaustio of security, are waived.

   5.12.    Notice. Notices and other communications required or permitted to be
            given hereunder will be in writing and will be  conclusively  deemed
            effectively  given upon  personal  delivery or  confirmed  facsimile
            transmission,  or five days after  deposit in United States Mail, by
            registered or certified mail, postage prepaid, or one day

                                        8



            after  forwarding  through  a  nationally   recognized  air  courier
            service, addressed

            (i)    if to the Company, at [ADDRESS TO BE PROVIDED]

            (ii)   if to Payee at,  [ADDRESS TO B PROVIDED],  Payee's address as
                   set  forth in the  Schedule  of  Purchasers  attached  to the
                   Purchase  Agreement,  or at such other address as the Company
                   or Payee may  designate  by ten (10)  days,  advance  written
                   notice  to  the  other  party  given  in  the  manner  herein
                   provided.


World Wide Wireless Communications, Inc.



- -----------------------------
By: Douglas P. Haffer
Title: President

                                        9



                                    EXHIBIT A

                              Notice of Conversion

TO: World Wide Wireless Communications, Inc.


The undersigned,  being the holder of the Convertible Debenture, dated September
30, 1999 made by you for the  principal  amount of $740,000  (the  "Debenture"),
hereby  surrenders  the  Debenture to you for  conversion  into shares of Common
Stock issued by you  ("Stock"),  such  conversion to be in  accordance  with the
terms and provisions of Section 2 of the Debenture.  The principal  amount to be
converted upon surrender of the Debenture is  $____________  and the accrued and
unpaid  interest  amount to be converted  upon the  surrender  of the  Debenture
(unless  paid  within  five  days  after  this  Notice)  is  $___________.   The
undersigned  hereby requests that a certificate  evidencing the shares of Common
Stock to be issued upon such conversion be issued in the name of


Dated:               , 1999
      --------------

- ---------------------------
      (Name of Holder)


By:
    -----------------------
            (Name)

- ---------------------------
            (Title)

(Address)
               ----------------------

               ----------------------

               ----------------------

C:\TEMP\WWW Communications Inc. - Convertible Debenture(2).WPD

                                       10