Document:

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                                                                   Exhibit 10.41

                             CO-MARKETING AGREEMENT

THIS AGREEMENT ("Agreement") is made this 14th day of September, 2006 (the
"Effective Date") by and between CIRCUIT CITY STORES, INC. ("Circuit City") a
Virginia corporation, with a principal place of business at 9950 Mayland Drive,
Richmond, Virginia 23233, and CLEARWIRE, US, LLC, ("Clearwire") a Nevada limited
liability company. Clearwire and Circuit City are hereinafter referred to as
"Party" or "Parties" as the context may require.

                                    RECITALS

WHEREAS, Clearwire is an Internet services provider;

WHEREAS, Circuit City, either directly or through its Affiliates, operates
retail stores and the Circuit City Website which offer, among other things,
computer, electronics, communication and data products and services to the
general public; and

WHEREAS, Circuit City and Clearwire desire for Circuit City to market, promote,
sell and solicit orders for Clearwire Internet and Internet-based services
through the Stores mutually selected by Circuit City and Clearwire and via the
Circuit City Website, subject to the terms and conditions of this Agreement;

NOW, THEREFORE, in consideration of the mutual promises and covenants set forth
below, the receipt and sufficiency of which is hereby acknowledged, the Parties
hereto agree as follows:

1.   DEFINITIONS.

     1.1  "Affiliate(s)" means an entity that is directly or indirectly owned or
          controlled, is under the common ownership or control with, or is owned
          or controlled by the entity with which it is affiliated.

     1.2  "Agreement" means this Agreement, and its Attachments and Exhibits,
          which are attached hereto and incorporated fully herein.

     1.3  "Bounty" means the amount that Clearwire shall pay Circuit City for
          each Qualified Subscriber generated by Circuit City's promotional
          efforts hereunder as specifically set forth in Exhibit B attached
          hereto.

     1.4  "Circuit City Website" means www.circuitcity.com.

     1.5  "Intellectual Property" shall mean all intellectual property rights
          world wide, including copyrights, patents, trademarks, service marks,
          trade names, and trade secrets, and rights of personality and
          likeness, and all similar rights whether arising by operation of law,
          contract, license or otherwise.

     1.6  "Marks" means all domain names, trademarks, trade names, service
          marks, logos and slogans associated with a Party's or that Party's
          third party licensors' products or services in Exhibit C for Clearwire
          and Exhibit D for Circuit City.

     1.7  "Promotional Materials" means advertising and other promotional
          communications, in any media, directed at potential Subscribers, which
          describes the Services.

     1.8  "Promotional Offer" means a special offer to potential Subscribers in
          terms of pricing or free service for a specified period of time.

                Clearwire/Circuit City Confidential Information

  Not to be disclosed without written permission of Clearwire and Circuit City

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     1.9  "Qualified Subscriber" means a Subscriber who, as a result of Circuit
          City's efforts satisfies the Clearwire pre-qualification process,
          subscribes to the Services, and makes the initial monthly payment for
          such Service and remains paying for 60 days, excluding promotions.

     1.10 "Services" means the wireless broadband and related Internet access
          and services where Clearwire has contractual arrangements for
          provisioning.

     1.11 "Stores" means Circuit City's retail "super stores" located within the
          United States.

     1.12 "Subscriber" shall mean an individual or entity that orders any
          offered Service by means of Circuit City under this Agreement.

     1.13 "Subscriber Information" means personally identifying information
          about Subscribers or potential Subscribers, such as the names,
          addresses, usernames, passwords, e-mail addresses of and financial
          information related to any Subscribers.

2.   OBLIGATIONS OF THE PARTIES.

     2.1  The obligations and duties of Clearwire and Circuit City with respect
          to the establishment and administration of the various obligations,
          respectively, are stated in this Agreement

     2.2  Each Party shall assign an account manager to coordinate the
          promotional programs with the other Party. If a Party changes the
          person assigned as the account manager, such Party shall notify the
          other Party in writing of the name and contact information of such new
          account manager.

     2.3  Subject to the terms and restrictions set forth in this Agreement,
          Clearwire hereby grants Circuit City limited rights to market and
          promote the Services described in the manner set forth herein. Circuit
          City hereby accepts the foregoing and agrees to market and promote the
          Services in the manner set forth herein.

     2.4  Clearwire shall be solely responsible for providing Circuit City with
          information relating to the Services and any Promotional Offers,
          including the content of Promotional Materials. Circuit City agrees to
          use such information solely in connection with its obligations under
          this Agreement.

     2.5  Clearwire shall at all times be solely responsible for providing and
          maintaining the Services including, but not limited to, billing and
          customer service. The Services promoted hereunder shall be comparable
          in features, functionality and pricing to the Services offered
          directly by Clearwire through its own sales channel or other
          retailers. Clearwire, in its sole discretion, reserves the right to
          accept, or reject, any potential Subscriber. Additionally, Clearwire
          and each Subscriber shall have the right, at any time, to terminate
          the Service provided to a Subscriber in accordance with the terms and
          conditions of the then current Clearwire Internet Services Agreement
          and related policies.

     2.6  Circuit City may not make any representations or warranties with
          respect to the Services other than those authorized in writing by
          Clearwire.

3.   TERM AND TERMINATION.

     3.1  Term. The term of this Agreement shall run from the Effective Date for
          a term of two (2) years (the "Initial Term"), unless otherwise
          terminated in accordance with Section 3.2 (Termination) below.

                Clearwire/Circuit City Confidential Information

  Not to be disclosed without written permission of Clearwire and Circuit City

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     3.2  Termination.

          3.2.1 During the Term, either Party may terminate this Agreement: (a)
               immediately upon written notice to the other Party if the other
               Party files a petition for bankruptcy or insolvency or has such a
               petition filed against it that is not dismissed within ninety
               (90) days, makes a general assignment for the benefit of
               creditors, becomes generally unable to pay its debts as they
               become due, suffers or permits the appointment of a receiver,
               trustee, or custodian for its business or any substantial part of
               its assets, or becomes subject to any proceeding under any
               statute of any governing authority relating to insolvency or the
               protection of rights of creditors, and is thereby rendered
               substantially unable to perform its material obligations
               hereunder; or (b) in the event the other Party is in material
               breach, or otherwise is materially in default of any other term,
               condition or provision of this Agreement, and such breach or
               default continues for thirty (30) days after the non-breaching
               Party gives written notice to the breaching Party thereof and
               such party fails to cure such breach or default, then, in
               addition to all other rights and remedies provided hereunder or
               at law or equity, the non-breaching party shall have the right to
               terminate this Agreement in whole or in part without any
               liability to the breaching party whatsoever, other than monies
               not otherwise in dispute and owed to the breaching party for
               services rendered during and under the Term of this Agreement.
               Upon termination of this Agreement for any reason Circuit City
               shall return all Cleanwire devices provided pursuant to this
               Agreement within ninety (90) days of the end of the Term.

          3.2.2 Notwithstanding anything to the contrary contained herein, after
               the first year of the Initial Term either Party shall have the
               right to terminate this Agreement at any time without cause, upon
               ninety (90) days' prior written notice.

          3.2.3 Upon the expiration or termination of this Agreement for any
               reason (a) all licenses granted under this Agreement shall
               immediately terminate; (b) Circuit City shall cease marketing the
               Services and shall cease distributing Promotional Materials; (c)
               the Parties shall promptly cease all use of each other's Marks
               that were licensed by this Agreement (as opposed to Marks that
               were licensed pursuant to another agreement); (d) all payments
               that have accrued prior to the termination or expiration shall be
               payable in full on the later of (i) ninety (90) days following
               the termination or expiration, or (ii) the date on which the
               payment would be otherwise due; and (f) all rights herein granted
               shall revert to the granting Party. Except for materials kept for
               archival purposes, each Party shall promptly return to the other
               Party any and all documents or other media embodying any use of
               the other Parry's Intellectual Property (including specifically,
               but not limited to, any copies of Promotional Materials that have
               not been distributed at the time of expiration or termination);
               provided, that if this Agreement is terminated because of an
               event set forth in 3.2.1 above, the Party responsible for the
               event (e.g., the breaching Party) shall bear all costs associated
               with the return of the Parties' respective Intellectual Property.
               Materials retained for archival purposes may not be used for any
               commercial purpose or distributed and shall be treated as
               Confidential Information. Clearwire shall have payment
               obligations (as set forth herein) in connection with Subscribers
               who sign up for the Service prior to or on the date of
               termination or expiration of this Agreement.

          3.2.4 All obligations of the Parties under this Agreement which, by
               their nature, would continue beyond termination, cancellation or
               expiration of this Agreement, including by way of illustration
               and not limitation those clauses relating to the obligations of
               Parties under Sections 1, 2.5, 3, 10, 11, 13 and 15 through 25
               shall survive such termination, cancellation or expiration.

                Clearwire/Circuit City Confidential Information

  Not to be disclosed without written permission of Clearwire and Circuit City

                                                                          Page 3

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4.   INTELLECTUAL PROPERTY RIGHTS.

     4.1  Each Party acknowledges that the other Party owns and retains all
          rights to Intellectual Property associated with such other Party's
          products and services ("Intellectual Property Rights") and agrees that
          it will not at any time during or after the Term of this Agreement
          assert or claim any interest in or do anything that may adversely
          affect the validity of any Intellectual Property Rights of the other
          Party (including without limitation any act or assistance to any act
          which may infringe or lead to the infringement of any Intellectual
          Property Rights of the other Party). Each Party agrees (i) not to
          knowingly remove or destroy any proprietary markings of the other
          Party contained in product, service, marketing or sales materials
          produced pursuant to this Agreement and (ii) to include such
          proprietary markings where appropriate when referring to the other
          Party's products or services in product, service, marketing or sales
          materials produced pursuant to this Agreement

     4.2  Clearwire Licensed Marks.

          4.2.1 Subject to the terms and conditions specified in this Agreement,
               Clearwire hereby grants to Circuit City (and Circuit City's
               Affiliates), for the term of this Agreement, a non-exclusive,
               non-transferable license to use the Clearwire licensed marks set
               forth in EXHIBIT C ("the Clearwire Licensed Marks") exactly as
               depicted in the graphic configuration or as subsequently modified
               by Clearwire. Clearwire may, in its sole discretion, at any time
               add to or delete from the Clearwire Licensed Marks and change the
               graphic configuration of the Clearwire Licensed Marks.

          4.2.2 Circuit City agrees that the style of use of the Clearwire
               Licensed Marks shall be in the form and style conforming to the
               trademark usage guidelines as provided to Circuit City in
               writing. Circuit City shall not use any of the Clearwire Licensed
               Marks as part of its corporate name, trade name, business name or
               Internet domain name.

          4.2.3 Circuit City shall submit to Clearwire for review and approval,
               at least ten (10) business days prior to proposed use, any web
               pages or other Internet locations, and all marketing,
               advertising, press releases or other Promotional Materials in
               which the Clearwire Licensed Marks are used. Clearwire shall
               approve or disapprove such materials at least five (5) business
               days after its receipt of such materials; Clearwire will not
               unreasonably withhold or delay the granting of its approval
               thereof. Circuit City shall not publish, distribute or use any
               such web pages or other Internet locations, or any such
               marketing, advertising, press releases or other Promotional
               Materials in which the Clearwire Licensed Marks are used, without
               the prior written approval of Clearwire.

          4.2.4 Notwithstanding the foregoing, Circuit City may designate at the
               time of submission that the requested approval is for
               multiple/repetitive, identical uses on the same medium. Circuit
               City may request approval for such multiple/repetitive, identical
               use through the end of the Initial Term or any Renewal Term of
               this Agreement, or six (6) months, whichever is less. Such
               multiple/repetitive, identical use shall be in accordance with
               this Agreement and shall be subject to revocation by Clearwire
               upon written notice to Circuit City.

          4.2.5 Circuit City further acknowledges and agrees that all use of the
               Clearwire Licensed Marks by Circuit City and all goodwill
               developed therefrom shall inure to the benefit of and be on
               behalf of Clearwire except for the goodwill associated or derived
               from the Circuit City Licensed Marks.

          42.6 Circuit City agrees that nothing in this Agreement shall give
               Circuit City any right, title or interest in or to the Clearwire
               Licensed Marks other than the right to use the Clearwire Licensed
               Marks in the manner contemplated by this Agreement, and only for
               so long a

                Clearwire/Circuit City Confidential Information

  Not to be disclosed without written permission of Clearwire and Circuit City

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               this Agreement is in force or as otherwise permitted under this
               Agreement (unless such Clearwire Licensed Marks are licensed
               pursuant to a separate agreement).

          4.2.7 Infringement.

               4.2.7.1 Circuit City agrees to use commercially reasonable
                    efforts to notify Clearwire promptly of any unauthorized use
                    of the Clearwire Licensed Marks by others, to the extent
                    Circuit City has actual notice of such use. Clearwire and
                    its parent and affiliated companies shall have the sole
                    right to engage in infringement or unfair competition
                    proceedings involving the Clearwire Licensed Marks.

               4.2.7.2 Any recovery obtained in connection with or as a result
                    of any infringement action contemplated under this section,
                    whether by settlement or otherwise, shall be retained by
                    Clearwire.

     4.3  Circuit City Licensed Marks.

          4.3.1 Subject to the terms and conditions specified in this Agreement,
               Circuit City hereby grants to Clearwire (and Clearwire's
               Affiliates), for the terra of this Agreement, a non-exclusive,
               non-transferable license to use the Circuit City licensed marks
               set forth in EXHIBIT D ("the Circuit City Licensed Marks")
               exactly as depicted in the graphic configuration or as
               subsequently modified by Circuit City. Circuit City may in its
               sole discretion at any time add to or delete from the Circuit
               City Licensed Marks and change the graphic configuration of the
               Circuit City Licensed Marks.

          4.3.2 Clearwire agrees that the style of use of the Circuit City
               Licensed Marks shall be in the form and style conforming to the
               trademark usage guidelines and brand identity standards, as
               provided to Clearwire in writing. Clearwire shall not use any of
               the Circuit City Licensed Marks as part of its corporate name,
               trade name, business name or Internet domain name.

          4.3.3 Clearwire shall submit to Circuit City for review and approval,
               at least ten (10) business days prior to proposed use, any web
               pages or other Internet locations, and all marketing,
               advertising, press releases or other Promotional Materials in
               which the Circuit City Licensed Marks are used. Circuit City
               shall approve or disapprove such materials at least five (5)
               business days after its receipt of such materials; Circuit City
               will not unreasonably withhold or delay the granting of its
               approval thereof. Clearwire shall not publish, distribute or use
               any such web pages or other Internet locations, or any such
               marketing, advertising, press releases or other Promotional
               Materials in which the Circuit City Licensed Marks are used,
               without the prior written approval of Circuit City.

          4.3.4 Notwithstanding the foregoing, Clearwire may designate at the
               time of submission that the requested approval is for
               multiple/repetitive, identical uses on the same medium. Clearwire
               may request approval for such multiple/repetitive, identical use
               through the end of the Initial Term or any Renewal Term of this
               Agreement, or six (6) months, whichever is less. Such
               multiple/repetitive, identical use shall be in accordance with
               this Agreement and shall be subject to revocation by Circuit City
               upon written notice to Clearwire.

          4.3.5 Clearwire further acknowledges and agrees that all use of the
               Circuit City Licensed Marks by Clearwire and all goodwill
               developed therefrom shall inure to the benefit of and be on
               behalf of CC West Coast, except for goodwill associated or
               derived from the Clearwire Licensed Marks.

                Clearwire/Circuit City Confidential Information

  Not to be disclosed without written permission of Clearwire and Circuit City

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          4.3.6 Clearwire agrees that nothing in this Agreement shall give
               Clearwire any right, title or interest in or to the Circuit City
               Licensed Marks other than the right to use the Circuit City
               Licensed Marks in the manner contemplated by this Agreement, and
               only for so long as this Agreement is in force or as otherwise
               permitted under this Agreement (unless such Circuit City Licensed
               Marks are licensed pursuant to a separate agreement).

          4.3.7 Infringement.

               4.3.7.1 Clearwire agrees to use commercially reasonable efforts
                    to notify Circuit City promptly of any unauthorized use of
                    the Circuit City Licensed Marks by others, to the extent
                    Clearwire has actual notice of such use. Circuit City and
                    its parent and affiliated companies shall have the sole
                    right to engage in infringement or unfair competition
                    proceedings involving the Circuit City Licensed Marks.

               4.3.7.2 Any recovery obtained in connection with or as a result
                    of any infringement action contemplated under this section,
                    whether by settlement or otherwise, shall be retained by
                    Circuit City.

5.   JOINT MARKETING PROGRAMS. Upon execution of this Agreement, the Parties
     will develop and implement the Joint Marketing Program set forth on EXHIBIT
     A. All aspects of the Joint Marketing Program will be approved by the
     Parties in writing as required by this Agreement Clearwire and Circuit City
     may work together in good faith to develop additional joint marketing
     programs.

6.   COMPENSATION. In consideration of the services to be rendered by Circuit
     City, Clearwire shall pay Circuit City the Bounty as described in EXHIBIT B
     for all Subscribers. Bounties shall be paid to Circuit City within thirty
     (30) calendar days following the end of the month in which the Subscriber
     signed up for the Services. For each Subscriber that becomes a Qualified
     Subscriber, the corresponding Bounty shall become vested in Circuit City
     sixty (60) days from Subscriber Activation. For each Subscriber that fails
     to become a Qualified Subscriber and for which Clearwire has already made
     the corresponding Bounty payments, Clearwire shall be entitled to deduct
     the prior Bounty and payments from future payments ("Deduction(s)") as more
     fully set forth on EXHIBIT B.

7.   REPORTS.

     7.1  Clearwire shall provide Circuit City with a monthly written report
          setting forth the monthly number of new Subscribers and the monthly
          number of Deductions, if any, thirty (30) calendar days following the
          end of each calendar month. Notwithstanding the foregoing, no report
          shall be issued when there is no underlying activity to report.

     7.2  Clearwire and Circuit City shall also use the Reconciliation Document,
          attached hereto as EXHIBIT E, for purposes of defining the interface
          requirements and expected results for transaction processing of
          activity, invoicing and payments between the Parties.

8.   PUBLICITY. Neither Party shall issue a press release or similar public
     announcement of any kind regarding the Parties' relationship established
     hereunder without the prior written approval of the other Party. Other than
     expressly set forth herein, neither Party shall use publicly the other
     Party's name or refer to the other Party in any way in or with the media,
     including, but not limited to, in advertising, without the other Party's
     prior written consent as required herein; provided, however, that either
     Party may make disclosures or filings required to comply with applicable
     laws, including filings with regulatory agencies, such as the United States
     Securities and Exchange Commission, or disclosures or filings required to
     comply with the rules of a national securities exchange or automated
     quotations systems such as the National Association of Securities Dealer's
     Automated Quotations. A VIOLATION OF THIS PROVISION SHALL CONSTITUTE A
     MATERIAL BREACH OF THIS AGREEMENT.

                Clearwire/Circuit City Confidential Information

  Not to be disclosed without written permission of Clearwire and Circuit City

                                                                          Page 6

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9.   REPRESENTATIONS AND WARRANTIES.

     9.1  Circuit City represents and warrants that (a) it has the right, power
          and authority to enter into this Agreement and fully perform its
          obligations hereunder; (b) this Agreement does not and will not
          conflict with any agreement between it and any other party; (c) it has
          all necessary federal, state and local authorizations, to operate and
          otherwise perform its obligations under this Agreement and will be in
          compliance with all applicable laws and regulations governing such
          performance; and (d) Circuit City has the full and exclusive right to
          grant or otherwise permit Clearwire to use the Circuit City Marks in
          accordance with the terms of this Agreement.

     9.2  Clearwire represents and warrants that (a) it has the right, power and
          authority to enter into this Agreement and fully perform its
          obligations hereunder; (b) this Agreement does not and will not
          conflict with any agreement between it and any other party; (c) it has
          all necessary federal, state and local authorizations, including
          intellectual property rights in and to the Services and to operate and
          otherwise perform its obligations under this Agreement and will be in
          compliance with all applicable laws and regulations governing such
          performance; and (d) Clearwire has the full and exclusive right to
          grant or otherwise permit Circuit City to use the Clearwire Marks.

10.  LIMITATION OF LIABILITY.

     10.1 EXCEPT AS EXPRESSLY SET FORTH IN THE AGREEMENT, NEITHER PARTY MAKES,
          AND EACH PARTY HEREBY SPECIFICALLY DISCLAIMS, ANY REPRESENTATIONS OR
          WARRANTIES RELATING TO THIS AGREEMENT OR THE PARTIES' RESPECTIVE
          SERVICES HEREUNDER, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY
          OR FITNESS FOR A PARTICULAR PURPOSE AND IMPLIED WARRANTIES ARISING
          FROM COURSE OF DEALING OR COURSE OF PERFORMANCE.

     10.2 EXCEPT FOR A PARTY'S INDEMNIFICATION OBLIGATIONS SET FORTH IN SECTION
          11 AND CONFIDENTIALITY OBLIGATIONS SET FORTH IN SECTION 13, BELOW,
          NEITHER PARTY SHALL BE LIABLE TO THE OTHER PARTY, IN WHOLE OR IN PART,
          FOR LOSS OF REVENUES, LOSS OF PROFITS, LOSS OF TIME, INCONVENIENCE,
          LOSS OF USE, OR ANY OTHER INCIDENTAL, SPECIAL, INDIRECT, PUNITIVE, OR
          CONSEQUENTIAL LOSS OR DAMAGE ARISING OUT OF THIS AGREEMENT, OR THE USE
          OR PERFORMANCE OF THE SERVICES, IN WHOLE OR IN PART, EVEN IF ADVISED
          OF THE POSSIBILITY THEREOF, OR IF REASONABLY FORESEEABLE, WHETHER IN
          AN ACTION FOR OR ARISING OUT OF ALLEGED BREACH OF WARRANTY, ALLEGED
          BREACH OF CONTRACT, DELAY, NEGLIGENCE, STRICT TORT LIABILITY OR
          OTHERWISE. THE LIMITATIONS SET FORTH IN THIS SECTION 10 SHALL NOT
          AFFECT EITHER PARTY'S RIGHT TO SEEK INJUNCTIVE RELIEF.

11.  INDEMNIFICATION.

     11.1 In connection with Clearwire's performance under this Agreement,
          Clearwire agrees to indemnify, defend and hold harmless Circuit City,
          its Affiliates, and their respective representatives, employees,
          directors, officers, and assigns against any losses, liabilities,
          lawsuits, penalties, claims or demands (including all costs, expenses,
          and reasonable attorneys' fees on account thereof) arising out of or
          in connection with (a) any third party claims for actual or alleged
          direct infringement of a third party's intellectual property rights
          with respect to the hardware leased or provided by Clearwire under
          this Agreement where such infringement of the claim arises from the
          hardware operating alone and not in combination with any other
          hardware or software not licensed, sold or provided by Clearwire, (b)
          any third party claim arising out of the sale, resale, use or failure
          of the Services, including, but not limited to claims for injuries
          (including death) to persons or damage to real or tangible property
          that results from Clearwire's negligent or willful

                 Clearwire/Circuit City Confidential Information

  Not to be disclosed without written permission of Clearwire and Circuit City

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          acts or omissions or those of persons furnished by Clearwire, (c) any
          employee or former employee of Clearwire or any of its sublicensees or
          subcontractors for which Clearwire's or its sublicensee's or
          subcontractor's liability to such employee or former employee would
          otherwise be subject to payments under the state Worker's Compensation
          or similar laws, (d) Clearwire's actual or alleged breach of any
          applicable law, statute, order, decree or regulation in performance of
          its obligations, or (e) any third party claim based upon any marketing
          material provided by Circuit City which Clearwire materially alters
          and uses without Circuit City's prior consent in accordance with
          Section 4.3 above. Circuit City agrees to promptly notify Clearwire of
          written claims or demands made against Circuit City, which Circuit
          City has received written notice of, for which Clearwire is
          responsible hereunder. Circuit City further agrees to assist Clearwire
          in its defense of such claim, at reasonable cost to Clearwire.
          Clearwire shall bear full responsibility for the defense (including
          any settlements) of any such claim; provided however, that (i)
          Clearwire shall not have any right, without Circuit City's written
          consent, to settle any such claim if such settlement arises from or is
          part of any criminal action, suit or proceeding or contains a
          stipulation to or admission or acknowledgment of, any liability or
          wrongdoing (whether in contract, tort or otherwise) on the part of
          Circuit City, or provides for less than a full release of Circuit
          City. Circuit City shall be entitled to participate in the action with
          counsel of its choice at its own expense. Clearwire shall not be
          responsible for any claims arising under (a) and/or (e) where Circuit
          City was informed of a claim or notice of infringement and failed to
          promptly remove or cease in the distribution of the infringing
          materials.

     11.2 In connection with Circuit City's performance under this Agreement,
          Circuit City agrees to indemnify, defend and hold harmless Clearwire,
          its Affiliates, and their respective representatives, employees,
          directors, officers, and assigns against any losses, liabilities,
          lawsuits, penalties, claims or demands (including all costs, expenses,
          and reasonable attorneys' fees on account thereof) arising out of or
          in connection with (a) any third party claims for actual or alleged
          infringement of a third party's intellectual property rights, (b) any
          employee or former employee of Circuit City or any of its sublicensees
          or subcontractors for which Circuit City's or its sublicensee's or
          subcontractor's liability to such employee or former employee would
          otherwise be subject to payments under the state Worker's Compensation
          or similar laws, (c) Circuit City's actual or alleged breach of any
          applicable law, statute, order, decree or regulation in performance of
          its obligations, or (d) any third party claim based upon any marketing
          material provided by Clearwire which Circuit City materially alters
          and uses without Clearwire's prior consent in accordance with Section
          4.2 above. Clearwire agrees to promptly notify Circuit City of written
          claims or demands made against Clearwire, which Clearwire has received
          written notice of, for which Circuit City is responsible hereunder.
          Clearwire further agrees to assist Circuit City in its defense of such
          claim, at reasonable cost to Circuit City. Circuit City shall bear
          full responsibility for the defense (including any settlements) of any
          such claim; provided however, that (i) Circuit City shall keep
          Clearwire informed of, and consult with Clearwire in connection with
          the progress of such litigation or settlement; and (ii) Circuit City
          shall not have any right, without Clearwire's written consent, to
          settle any such claim if such settlement arises from or is part of any
          criminal action, suit or proceeding or contains a stipulation to or
          admission or acknowledgment of, any liability or wrongdoing (whether
          in contract, tort or otherwise) on the part of Clearwire or any
          Clearwire Affiliate, or provides for less than a full release of
          Clearwire. Clearwire shall be entitled to participate in the action
          with counsel of its choice at its own expense. Circuit City shall not
          be responsible for any claims arising under (d) where Clearwire was
          informed of a claim or notice of infringement and failed to promptly
          remove or cease in the distribution of the infringing materials

12.  INSURANCE.

     12.1 Clearwire shall maintain, during the term hereof, all insurance
          required by law and the insurance listed below. Clearwire agrees that
          Clearwire, Clearwire's insurer(s) and anyone claiming by, through,
          under or on behalf of Clearwire shall have no claim, right of action
          or right of subrogation against Circuit City or Circuit City's
          customers based on any loss or liability insurable under the foregoing
          insurance, except to the extent Circuit City has an indemnification
          obligation under Section 11.2 for

                Clearwire/Circuit City Confidential Information

  Not to be disclosed without written permission of Clearwire and Circuit City

                                                                          Page 8

<PAGE>

          such claim, right of action or subrogation. Certificates furnished by
          Clearwire or its subcontractors shall contain a clause stating,
          "Circuit City Stores, Inc. shall be notified in writing at least
          thirty (30) days prior to cancellation of the policy."

     12.2 Clearwire shall maintain, during the Term hereof, all insurance and/or
          bonds required by law, including but not limited to:

          12.2.1 Workers Compensation insurance as required by the State(s) in
               which this Agreement is to be performed.

          12.2.2 Comprehensive or Commercial General Liability Insurance, on an
               Occurrence Basis, including by not limited to
               premises-operations, broad form property damage, contractual
               liability, independent contractors, and personal injury with
               limits of at least $2,000,000 combined single limit for each
               occurrence.

          12.2.3 Automobile Liability, Comprehensive Form with limits of at
               least $2,000,000 combined single limit for each occurrence.

     12.3 Circuit City and its subsidiaries shall be named as an additional
          insured to the liability insurance policies required under this
          Agreement and this shall be so evidenced upon the Certificate(s) of
          Insurance. Clearwire shall maintain insurance, as required by this
          Agreement, through insurance carriers which have and maintain an A.M.
          Best rating of A-VII or greater. The fulfillment of the insurance
          obligations hereunder shall not otherwise relieve Clearwire of any
          liability assumed by Clearwire hereunder or in any way modify
          Clearwire's obligations to indemnify Circuit City.

     12.4 Clearwire shall furnish, within ten (10) days of the Effective Date of
          this Agreement, certificates or adequate proof of the foregoing
          insurance.

13.  CONFIDENTIAL INFORMATION

     13.1 "Confidential Information" means any and all business, technical,
          customer or third party information (including but not limited to,
          trade secrets, marketing plans, financial data, specifications,
          drawings, sketches, models, samples, computer programs and
          documentation) provided, disclosed or made accessible by one Party
          (the "Disclosing Party") to the other (the "Receiving Party") under
          this Agreement, that is either identified as or would be reasonably
          understood to be confidential and/or proprietary. Confidential
          Information also includes (a) any Information that a Party receives,
          collects, learns of, or develops in the course of performing its
          obligations under this Agreement, including but not limited to
          prospective and actual customer's names, addresses, telephone numbers,
          email addresses, financial data, including credit card or banking
          information, and other customer information; and (b) the terms and
          conditions of this Agreement. Confidential Information does not
          include information that the Receiving Party can clearly establish by
          written evidence: (a) is or becomes known to the Receiving Party from
          a third party without an obligation to maintain its confidentiality;
          (b) is or becomes generally known to the public through no act or
          omission of the Receiving Party; or (c) is independently developed by
          the Receiving Party without the use of Confidential Information of the
          Disclosing Party. Clearwire will be the owner of any Subscriber
          Information generated by Clearwire in connection with a Subscriber's
          order for Services and such information will be deemed Clearwire
          Confidential Information for purposes of this Agreement. Circuit City
          will be the owner of any Confidential Information generated by Circuit
          City in connection with a Subscriber's order for Circuit City goods or
          services or otherwise in connection with Circuit City's performance of
          its duties and obligations hereunder and such information will be
          deemed Circuit City's Confidential Information. Any information
          obtained by both Parties shall be owned by each Party.

     13.2 Confidential Information will be deemed the exclusive property of the
          Disclosing Party. The Receiving Party will not: (a) use Confidential
          Information of the Disclosing Party for any purpose

                Clearwire/Circuit City Confidential Information

  Not to be disclosed without written permission of Clearwire and Circuit City

                                                                          Page 9

<PAGE>

          other than the fulfillment of its obligations under this Agreement;
          (b) disclose Confidential Information of the Disclosing Party to any
          third party, without the prior written consent of the Disclosing
          Party; (c) make any copies or modifications of Confidential
          Information of the Disclosing Party without the Disclosing Party's
          prior written consent, and provided that any authorized copies or
          modifications will contain the same confidential or proprietary
          notices or legends, if any, which appear on the original; and (d)
          reveal, divulge, make known, sell, exchange, lease or in any other way
          transfer any Confidential Information to any third party.

     13.3 The Receiving Party will: (a) protect and treat all Confidential
          Information of the Disclosing Party with the same degree of care as it
          uses to protect its own Confidential Information of like importance,
          but in no event with less than reasonable care; and (b) only disclose
          Confidential Information of the Disclosing Party to its employees
          and/or agents who have a "need to know" for purposes of this
          Agreement, provided that the Receiving Party will notify and inform
          such employees and/or agents of the Receiving Party's obligations
          under this Agreement, and the Receiving Party will be responsible for
          any breach of this Agreement by its employees and/or agents.

     13.4 In the event that the Receiving Party is required to disclose
          Confidential Information of the Disclosing Party pursuant to law, the
          Receiving Party will notify the Disclosing Party of the required
          disclosure with sufficient time for the Disclosing Party to seek
          relief, will cooperate with the Disclosing Party in taking appropriate
          protective measures, and will make such disclosure in a fashion that
          maximizes protection of the Confidential Information from further
          disclosure.

     13.5 Upon expiration or termination of this Agreement, the Receiving Party
          will promptly turn over to the Disclosing Party or, at the Disclosing
          Party's direction, destroy all Confidential Information of the
          Disclosing Party, in whole or in part, in whatever format, including
          any copies.

     13.6 Each Party agrees that monetary damages for breach of its obligations
          under this Section may not be adequate and that the non-breaching
          Party will be entitled to injunctive relief with respect thereto.

14.  ASSIGNMENT. Neither party may assign or otherwise transfer any of its
     rights or obligations hereunder without the prior written consent of the
     other, which shall not be unreasonably withheld; provided, however, that
     nothing herein shall prevent either party from assigning its rights and
     obligation under this Agreement to an Affiliate, or to an entity that
     acquires all or substantially all of the assets of such party through a
     merger, consolidation, or sale, provided further that the assigning party
     provides notice of such permitted assignment as soon as commercially
     reasonable.

15.  RELATIONSHIP BETWEEN THE PARTIES. The Parties to this Agreement are
     independent Parties and nothing herein shall be construed as creating an
     employment relationship between the Parties. Neither Party is an agent,
     representative, joint venturer nor partner of the other Party and neither
     Party shall have any right, power or authority to enter into any agreement
     for or on behalf of, or incur any obligation or liability, or to otherwise
     bind, the other Party. The Agreement shall not be interpreted or construed
     to create an association, agency, joint venture or partnership between the
     Parties or to impose any liability attributable to such a relationship upon
     either Party.

16.  FORCE MAJEURE. Neither Party shall be in default or otherwise liable for
     any delay in or failure of its performance under this Agreement if such
     delay or failure arises by any reason beyond its reasonable control,
     including any act of God, any acts of the common enemy, the elements,
     earthquakes, floods, fires, epidemics, riots, failures or delay in
     transportation, electricity or communications, or any act or failure to act
     by the other Party or such other Party's employees, agents or contractors;
     provided, however, that lack of funds shall not be deemed to be a reason
     beyond a Party's reasonable control. The Parties will promptly inform and
     consult with each other as to any of the above causes which in their
     judgment may or could be the cause of a delay in the performance of this
     Agreement.

                Clearwire/Circuit City Confidential Information

  Not to be disclosed without written permission of Clearwire and Circuit City

                                                                         Page 10

<PAGE>

17.  THIRD PARTY BENEFICIARIES. The provisions of this Agreement are for the
     sole benefit of the parties hereto and this Agreement confers no rights,
     benefits or claims upon any person or entity not a party hereto. Third
     party beneficiaries do not include Clearwire Affiliates.

18.  CHOICE OF LAW. The Parties agree that the substantive laws of the State of
     New York, without reference to its principles of conflicts of laws, will be
     applied to govern, construe and enforce all of the rights and duties of the
     Parties arising from or relating in any way to the subject matter of this
     Agreement. THE PARTIES KNOWINGLY AND VOLUNTARILY WAIVE ANY RIGHT TO TRIAL
     BY JURY IN ANY JUDICIAL PROCEEDING INVOLVING ANY MATTER ARISING OUT OF, OR
     RELATED TO, THIS AGREEMENT.

19.  AUDIT RIGHTS. During the term of this Agreement and for a period of two (2)
     years following the expiration or termination of this Agreement, both
     Parties shall create and maintain sufficient books, records and accounts
     related to this Agreement according to generally accepted accounting
     practices. Each Party shall have the right, at its own expense, to inspect
     or direct an independent certified public accountant to inspect and audit
     those books and records of the other Party that are relevant to the
     determination of compensation payable hereunder, provided, however, that
     such audits will be conducted no more than once in any calendar year, upon
     not less than thirty (30) days' notice, during regular business hours, at
     mutually agreeable dates and times (not to be unreasonably withheld or
     delayed), and provided further that such accountant, if any, executes a
     confidentiality agreement reasonably satisfactory to the Party being
     audited, to protect the confidentiality of any records so audited. If the
     audit discloses a payment discrepancy or error, the Party responsible for
     correcting such error shall make any undisputed payment or remittance
     within thirty (30) business days of the generation of the audit report. In
     the event an audit discloses a payment discrepancy or error of more than
     five (5) percent of the correct amount, the Party owing such payment or
     remittance shall bear the cost of the audit.

20.  NOTICES. All notices, authorizations, and requests required or desired to
     be given or made in connection with this Agreement will be in writing,
     given by certified or registered mail (return receipt requested), or by
     nationally recognized overnight courier (charges prepaid), and addressed as
     follows (or to such other address as the Party to receive the notice or
     request so designates by notice to the other):

          To Clearwire:      Clearwire, US LLC.
                             5808 Lake Washington Blvd.
                             Suite 300
                             Kirkland, Wa, 98033

          To Circuit City:   Circuit City Stores, Inc.
                             9950 Mayland Drive
                             Richmond, Virginia 23221
                             Attn: Internet Services Buyer

                             With copies to:

                             Circuit City Stores, Inc.
                             9950 Mayland Drive
                             Richmond, Virginia 23221
                             Attn: Legal Department

          Notice shall be deemed effective upon actual delivery.

21.  SEVERABILITY. In the event that one or more of the provisions contained
     herein shall, for any reason, be held unenforceable in any respect, such
     unenforceability shall not affect any other provision of this Agreement,
     and this Agreement shall then be construed as if such unenforceable
     provision(s) did not exist.

                 Clearwire/Circuit City Confidential Information

  Not to be disclosed without written permission of Clearwire and Circuit City

                                                                         Page 11

<PAGE>

22.  WAIVER. Failure by either Party to enforce any provision of this Agreement
     shall not be deemed a waiver of future enforcement of that or any other
     provision. The waiver by a Party of any default hereunder shall not be
     deemed to be a waiver of subsequent defaults of the same or different kind.

23.  INTERPRETATION. This Agreement shall be fairly interpreted in accordance
     with its terms and without any construction in favor of or against either
     Party. The headings and captions are included for reference purposes only
     and do not affect the interpretation of the provisions hereof. The captions
     in this Agreement are for convenience of reference only and shall not limit
     or otherwise affect any of the terms or provisions hereof. Use of the words
     "herein", "hereof", "hereto" and the like in this Agreement refer to this
     Agreement as a whole and not to any particular Article, Section or
     provision of this Agreement, unless otherwise noted. When the context
     requires, the number of all words includes the singular and plural.

24.  COUNTERPARTS. This Agreement may be executed in counterparts, each of which
     shall be deemed an original and which together shall constitute one
     instrument. This Agreement may be executed by facsimile, and each facsimile
     signature shall be deemed to constitute a valid and binding signature of
     the executing party.

25.  ENTIRE AGREEMENT. This Agreement and its Attachments and Exhibits shall
     constitute the entire agreement between the Parties hereto with respect to
     the subject matter hereof and all previous agreements relating thereto
     shall be null and void unless specifically incorporated herein. This
     Agreement may not be amended, modified or rescinded except by a writing
     executed by both Parties hereto.

IN WITNESS WHEREOF, the Parties have executed this Agreement, by their
authorized representatives, as of the date written above.

CLEARWIRE, U.S., L.L.C                  CIRCUIT CITY STORES, INC.

/s/ JAMES RYDER                         /s/ Phil Schoonover
-------------------------------------   ----------------------------------------
Signature                               Signature

JAMES RYDER                             Phil Schoonover
Name                                    Name

Sr VP                                   CEO
Title                                   Title

                 Clearwire/Circuit City Confidential Information

  Not to be disclosed without written permission of Clearwire and Circuit City

                                                                         Page 12

<PAGE>

                                   EXHIBIT A

                             JOINT MARKETING PROGRAM

MARKETING COMMITMENT

- Circuit City to produce 4" X 5" signage (logo treatment) in Location F for
  duration of the Agreement.

- Circuit City to produce 8 1/2" X 11" signage (displays offer) in Location B
  for duration of the Agreement.

- Clearwire shall be included on the Circuit City Website when Circuit City has
  the functionality to complete sales of the Services through the Circuit City
  Website.

- 4' inline section, including mutually agreed upon art work and signage (to be
  installed by Circuit City) to display market and promote the Clearwire
  Service.

- Provide Computer equipment (PC and/or Macintosh) for each store to demonstrate
  the Clearwire Service.

- Circuit City shall maintain such equipment and ensure that it is fully
  functional during store hours.

- Mutually agreed upon in-store demonstrations highlighting the use of the
  Clearwire Service.

CIRCUIT CITY DELIVERABLE

   - Circuit City is committed to designing, producing and shipping the signage
     elements on behalf of Clearwire at no additional cost to Clearwire.
     Clearwire would provide the logo requirements and furnish any art that they
     would like to have incorporated in the signage within 5 days of receipt
     from Clearwire and shall be commercially available for in-store placement
     within 10 days. We would design, send to Clearwire for review and approval,
     then produce the signage and ship at no cost to Clearwire. PLEASE NOTE: 4"
     X 5" is logo only and the 8 1/2" X 11" signage, which displays the current
     offer by market, is produced from an existing template. Change to the
     format of that template is at the sole discretion of Circuit City.

                                     [LOGO]

CLEARWIRE DELIVERABLE

   - Clearwire shall pay Circuit City a one-time fee per store of $2,800 for the
     Marketing Commitments outlined above Net thirty (30) days from applicable
     store launch.

   - Clearwire shall notify Circuit City sixty (60) days in advance of its
     intent to launch in a specific store.

   - Assign a demo modem for each store

   - Clearwire shall pay an additional $150 per store per month to secure a 4'
     in-line section that will include mutually agreed upon art work/materials
     to be produced and installed by Circuit City.

                                                                         Page 13

<PAGE>

                                    EXHIBIT B

                              BOUNTY PAYMENT TERMS

I.   Bounty Payments

     A.   Bounty Payments. Provided Circuit City is not in breach of its
          obligations as set forth in this Agreement, Clearwire will pay Circuit
          City a one-time Bounty payment of one hundred dollars ($110.00) for
          each Qualified Subscriber who subscribes to the Services in accordance
          with the payment provisions set forth in Section 6.

II.  Deductions

     Circuit City's monthly compensation may be subject to Deductions by
     Clearwire for Bounties already paid to Circuit City for which the
     corresponding Subscriber does not become a Qualified Subscriber. If such
     amount cannot be deducted, Circuit City shall pay such Deduction amount in
     the form of a charge-back or refund within thirty (30) days of the date
     that Clearwire notifies Circuit City in writing that such Subscriber failed
     to become a Qualified Subscriber.

                Clearwire/Circuit City Confidential Information

  Not to be disclosed without written permission of Clearwire and Circuit City

                                                                         Page 14

<PAGE>

                                    EXHIBIT C

                                CLEARWIRE MARKS

Instructions for use of the Clearwire Marks can be found at
www.clearpartner.com.

                Clearwire/Circuit City Confidential Information

  Not to be disclosed without written permission of Clearwire and Circuit City

                                                                         Page 15

<PAGE>

                                    EXHIBIT D

                          CIRCUIT CITY LICENSED MARKS

         (CIRCUIT CITY LOGO)                     (CIRCUIT CITY(R) LOGO)
                                                JUST WHAT I NEEDED(R) SM

         (CIRCUIT CITY LOGO)                     (CIRCUIT CITY(R) LOGO)

                 Clearwire/Circuit City Confidential Information

  Not to be disclosed without written permission of Clearwire and Circuit City

                                                                         Page 16

<PAGE>

                                    EXHIBIT E

                            RECONCILIATION DOCUMENT

                     PROVIDER NAME RECONCILIATION INTERFACE
                   SPECIFICATION AND PROJECT STATUS DOCUMENT

                                  Prepared By:

                             [Logo of Circuit City]

                             Last Updated: 1/4/2007

                              Updated by Jean Wong

TABLE OF CONTENTS

REVISION HISTORY...........................................................   4

PURPOSE OF DOCUMENT........................................................   4

RECONCILIATION PROJECT.....................................................   4

Objective..................................................................   4

PROJECT MILESTONES & DELIVERABLES:.........................................   4

PROJECT TEAM...............................................................   6

Circuit City...............................................................   6
Provider Name.......................................ERROR! BOOKMARK NOT DEFINED
MEETINGS...................................................................   6

BUSINESS REQUIREMENTS......................................................   6

Reconciliation Data Exchange...............................................   6
Operation Support Procedures...............................................   7
Service Level Expectations.................................................   7
Change Management Procedures...............................................   7
Reporting Specifications...................................................   7
Security...................................................................   7

TECHNICAL SPECIFICATIONS...................................................   7

1.0  Partner Activity File.................................................   8
2.0  Method of Connectivity................................................  11
3.0  Invoicing.............................................................  11
4.0  Payment File..........................................................  14
5.0  Method and Frequency of Data Transmission.............................  15

TESTING....................................................................  16

Requirements...............................................................  16
Methodology................................................................  16
Certification..............................................................  16

REVISION HISTORY

       WHO                   WHEN                    WHAT
Jean Wong                   6/8/2004         Modified document to be specific
                                             to ProviderName.
Carrie Redman              6/25/2004         Added line number to payment
                                             file.
Jean Wong                   1/3/2005         Created PID specific version

PURPOSE OF DOCUMENT

This document describes the purpose of each interface and expected results. It
also covers in detail any operational procedures required to support each
interface, escalation procedures if problems occur, service level expectations,
change management procedures, and any reporting or other additional
requirements. The technical implementation is also addressed, and the
specification describes in detail the data feed format, method of data
transmission, frequency, and security.

RECONCILIATION PROJECT

Objective

This project will automate the management of ProviderName's financial
obligations to Circuit City. It will also facilitate the quick identification
and correction of any exceptions.

PROJECT MILESTONES & DELIVERABLES

                              Responsible   Assigned   Milestone  Completion
Task                             Party         to         Date       Date
----                          -----------   --------   ---------  ----------
Transmission method with
 CCS (activity file)          ProviderName

Activity File Specs/
 sample to ProviderName       CCS

Activity File sample
 from ProviderName            ProviderName

Activity File creation
 coding complete              ProviderName

Activity File load
 coding complete              CCS

Activity File load
 coding complete in
 Billing                      CCS

Activity Test File
 from ProviderName            ProviderName

Paper Invoice sample
 to ProviderName              CCS

ProviderName Accounting
 Dept acceptance of
 invoice                      ProviderName

Paper invoice test to
 ProviderName                 CCS

Invoice Detail File
 specs to ProviderName        CCS

Invoice Detail File
 coding complete              CCS

Invoice Detail File
 sample to ProviderName       CCS

ProviderName IT acceptance
 of detail file               ProviderName

ProviderName Accounting
 Dept acceptance of file      ProviderName

Invoice Detail Test File
 to ProviderName              CCS

Paymt Remit File Specs/
 sample to ProviderName       CCS

Paymt Remit File load
 coding complete              CCS

Paymt Remit File sample
 from ProviderName            ProviderName

Paymt Remit File
 creation coding complete     ProviderName

Paymt Remit Test File
 from ProviderName            ProviderName

Customer Information
 request to ProviderName      CCS

Customer information from
 ProviderName                 ProviderName

ProviderName ID set up --
requires signed contract      CCS

ProviderName ID communicated
 to ProviderName              CCS

Payment terms received
 from Merchandising--
 requires signed contract     CCS

Payment terms agreed to
 by ProviderName
 Accounting Dept              ProviderName

Integration Testing begins    All

System Testing plan
 created for ProviderName     CCS

System Testing plan
 communicated to
 ProviderName                 CCS

System Testing Plan accepted
 by ProviderName              ProviderName

System Testing begin date     All

Initial Rollout               CCS            Sales/Inv.
                                             team

National Launch of Station    All

PROJECT TEAM

Circuit City

<Table>

<S>              <C>                   <C>                                <C>

Matt Saufley     (804) 527-4000x2593   Matt_Saufley@circuitcity.com        Merchandising-Broadband
Brian Leach      (804) 527-4000x3365   Brian_Leach@circuitcity.com         Merchanding-Video
Carrie Redman    (804) 527-4000x2032   Carrie_Redman@circuitcity.com       Finance Systems
Susan Davis      (804) 527-4000x3337   Susan_Davis@circuitcity.com         Accounts Receivable Manager
Bill Fenerty     (804) 527-4000x4705   Bill_Fenerty@circuitcity.com        MIS Finance Systems Project Manager
TBD                                                                        MIS Finance System Lead
Richard Flaherty (804) 527-4000x3651   Richard_flaherty@circuitcity.com    MIS Open Systems Lead
TBD              (804) 527-4000                                            MIS PeopleSoft Financials Project Manager
TBD              (804) 527-4000                                            MIS PeopleSoft Financials Lead
</Table>

ProviderName

-  TBD

Meetings

-  TBD

BUSINESS REQUIREMENTS

Reconciliation data exchange

-  Both project teams will work diligently to agree upon and execute a
   Reconciliation strategy that will fulfill the objective of the project.

-  All information detailed in the technical specifications will be provided
   to further that objective.

Operation Support Procedures

-  Circuit City and ProviderName will identify support to handle errors in
   transmission or loading of files. Escalation procedures will be
   established.

-  Individual records not matched by Circuit City will be researched by
   Circuit City Receivables and ProviderName will be contacted if more
   information on the record is required.

Service Level Expectations

-  As timing can be extremely crucial both a primary and secondary support
   contact must be provided (can be accomplished by pager numbers). There
   must also be a third escalation contact--should be a named individual.

-  Circuit City Receivables personnel will escalate leads remaining in a
   pending status more than the standard length of time established between
   Circuit City and ProviderName. Corrections to the leads will be sent
   through a future "Partner Activity File" and adjusted on a future
   invoice.

Change Management Procedures

-  Accounting department approval of the invoicing and payment procedure
   is required from both parties

-  Internal change management procedures for Accounting Department are
   the responsibility of each company.

Reporting Specifications

-  Circuit City requires no additional reporting other than what is
   outlined in this document.

Security

-  Access to information will be limited to those personnel who are
   involved in the reconciliation function and the affected areas of
   the business.

TECHNICAL SPECIFICATIONS

1.0 Partner Activity File

-  ProviderName will provide Circuit City a daily or weekly file ("Partner
   Activity File)" that includes account status changes for internet and cable
   services ordered. These account status changes include cancellations,
   installations, etc.

-  File Attributes.

-  This file will be used to report all activity once the video is launched.
   This means it will also be used to report on activity for orders taken prior
   to the launch video launch date. Therefore, in order to distinguish those
   orders, the line item value will be '0' for activity on orders taken prior to
   the video launch date. This is needed since the DTB line number was not
   captured for those orders.

<TABLE>
<CAPTION>
Attribute                 Description                    Data Type     Required
---------                 -----------                    ---------     --------
<S>                       <C>                            <C>           <C>

Provider                  3 Char CC assigned             Alpha,3       Yes
                          Provider ID - PID

Tracking_Number           Unique GetConnected            Numeric       Yes
                          order number assigned to       Long
                          identify the. This value is
                          in the CUSTOM_REFERENCE node
                          of the AFFILIATE element.

Line_Item                 Unique line number within      Numeric       Yes
                          the tracking_number            Long
                          (GetConnected order number)
                          used to identify the service
                          offering. It can be found in
                          the LINE node of the
                          SERVICE_ORDER element.

                          Note: Line item must be
                          set to "0" for any activity
                          being reported that is for
                          an order taken prior to
                          the cable launch date.

G2b_affiliate_reference   The G2B tracking number        Numeric       No
                          found in the TRACKING          Long
                          node of the G2B element.

Provider_account_number   MSO reference number from      Alpha,25      No
                          the MSO_REFERENCE node of
                          the G2B element or the
                          providers own internal
                          tracking number.

Activity_type             The abbreviation for the       ALPHA,3       Yes
                          activity. For example, ACT
                          is activation, CAN is
                          cancelation.

Activity_reason           A longer description           ALPHA,50      No
                          for the activity type.

Activity_date             The date the activity          Date,10       Yes
                          occurred in MM/DD/YYYY
                          format.
</TABLE>
*  File Layout

(Note: A more detailed XSD layout can be provided upon request.)

"?xml version ="1.0" encoding="ISO-8859-1"?"
"schema xmlns = "http://www.w3.org/1999/XMLSchema""
"element name="activityfile""
"complexType content="elementOnly""
"sequence"
"element ref="activation" minOccurs="1" maxOccurs="unbounded"/"
"/sequence"
"/complexType"
"/element"

"element name="activation""
"complexType content="elementOnly""
"sequence"
"element ref="provider"/"
"element ref="g2b_affiliate_reference" minOccurs="0" maxOccurs="1"/"
"element ref="tracking_number"/"
"element ref="line_item"/"
"element ref="provider_account_number" minOccurs="0" maxOccurs="1"/"
"element ref="activity_type"/"
"element ref="activity_reason" minOccurs="0" maxOccurs="1"/"
"element ref="activity_date"/"
"/sequence"
"/compexType"
"/element"
"element name="activity_date" type="string"/"
"element name="activity_reason" type="string"/"
"element name="g2b_affiliate_reference" type="long"/"
"element name="provider_account_number" type="string"/"
"element name="line_item" type="int"/"
"element name="tracking_number" type="long"/"
"element name="provider" type="string"/"
"/schema"

*  File Sample
XML Sample Data --

"?xml version ="1.0" encoding="UTF-8"?"

"activityfile"
 "activation"
  "provider"PID"/provider"
  "g2b_affiliate_reference"123456789"/g2b_affiliate_reference"
  "tracking_number"0"/tracking_number"
  "line_item"1"/line_item"
  "provider_account_number"122223334"/provider_account_number"
  "activity_type"ACT"/activity_type"
  "activity_reason"Activation"/activity_reason"
  "activity_date"02/16/2004"/activity_date"
 "/activation"
 "activation"
  "provider"PID"/provider"
  "g2b_affiliate_reference"123456789"/g2b_affiliate_reference"
  "tracking_number"105300"/tracking_number"
  "line_item"1"/line_item"
  "provider_account_number"122223334"/provider_account_number"
  "activity_type"ACT"/activity_type"
  "activity_reason"Activation"activity_reason"
  "activity_date"02/16/2004"/activity_date"
 "/activation"
 "activation"
  "provider"PID"/provider"
  "g2b_affiliate_reference"123456789"/g2b_affiliate_reference"
  "tracking_number"105300"/tracking_number"
  "line_item"2"/line_item"
  "provider_account_number"122223334"/provider_account_number"
  "activity_type"ACT"/activity_type"
  "activity_reason"Activation"/activity_reason"
  "activity_date"02/16/2004"/activity_date"
 "/activation"
 "activation"
  "provider"PID"/provider"
  "g2b_affiliate_reference"123456789"/g2b_affiliate_reference"
  "tracking_number"105300"/tracking_number"
  "line_item"3"/line_item"
  "provider_account_number"122223334"/provider_account_number"
  "activity_type"ACT"/activity_type"
  "activity_reason"Activation"/activity_reason"
  "activity_date"02/16/2004"/activity_date"
 "/activation"
 "/activityfile"

In the event there is not activity for a given time period, we expect the
following to be sent in the empty XML activity file:

"?XML version="1.0" encoding="UTF-8"
?" "activityfile" "/activityfile"

2.0 Method of Connectivity

-  ProviderName must supply the data directly to Circuit City through XML.

-  The preferred method of transport with Circuit City initiating the transfer
   is as follows: 1) HTTPS, 2)FTP with PGP encryption or 3) SMTP with PGP
   encryption.

3.0 Invoicing

-  ProviderName will supply Circuit City with the following address and contact
   information for the purpose of billing and correspondence relative to the
   receivable. (Report this on the accompanying spreadsheet.)

-  ProviderName will receive one invoice for Broadband and will provide a
   payment file for Video Services.

<TABLE>
<CAPTION>
CATEGORY                                INFORMATION REQUESTED
--------                                ---------------------
<S>                                     <C>
General Information                     Company Name (legal)

Address Information                     Street Address
                                        Address line 2
                                        City
                                        State
                                        Zip

Contacts -- may have as many as         Name
needed, 1 bill to contact requested     Title
                                        Email
                                        Role (Payables, Sales,
                                           Management, IT, Bill to, etc.)
                                        Phone Number
                                        Extension
                                        Fax
                                        Pager
                                        Cell
                                        Preferred Communication (Fax,
                                           phone, email, mail, page)
                                        Name to appear in ATTN line of
                                           invoice (select 1)
                                        Name to appear in ATTN line of
                                           stmts, letters (select 1)
Payment information                     Payment Method (check, ACH, wire)
                                        Payment Timing (inv due date, 5 days
                                        after the receipt of inv, etc.)
</Table>

* Circuit City will send a monthly paper invoice summary, "Summary Invoice," for
  the previous month's transactions per the contract terms. This invoice will be
  based on information from the "Partner Activity File." Any discrepancies with
  the invoice amount should be communicated to Circuit City and detail
  information can be provided as needed to resolve these issues.

     - Summary Invoice (Paper)

                                    INVOICE

<TABLE>
<Caption>
PLEASE REMIT TO:                        PAGE:               1
<S>                                     <C>                 <C>
  Corporate Merchant Receivables        Invoice No:         CBB00000010
  Circuit City Stores, Inc.             Invoice Date:       06/27/2001
  Attn: Merchant Receivables            Customer Number:    ABC
  9954 Mayland Dr.                      Payment Terms:      M30
  DR3, 6th Floor                        Due Date:           07/30,2001
  Richmond, VA 23233

                                        AMOUNT DUE:         $22,000.00

CUSTOMER:
  ABC Company
  17th Floor, Suite 1701
  Downtown Building
  2401 D Street
  Washington, DC 20202
</TABLE>

For billing questions, please call 804/527-4000

<TABLE>
<Caption>
-----------------------------------------------------------------------------
IDENTIFIER                     QUANTITY     UNIT AMT       NET AMOUNT
-----------------------------------------------------------------------------
<S>           <C>              <C>          <C>            <C>
Plan 1        Activations       150          100.00         15,000.00
Plan 1        Chargebacks       (10)         100.00         (1,000.00)
Plan 3        Activations        82          100.00         8,200.000
Plan 3        Chargebacks        (2)         100.00           (200.00)

                            TOTAL AMOUNT DUE:              $22,000.00

-----------------------------------------------------------------------------
STND                                                         ORIGINAL
</TABLE>

    - Invoice Detail File (.csv)

This information will be provided by Circuit City on an as requested basis for
discrepancies in summary totals.

<TABLE>
<Caption>
                             DATA         MAX         DEFAULT VALUE, FORMAT,
ATTRIBUTE                    TYPE       LENGTH        FORMULA, COMMENTS
-----------------------------------------------------------------------------
<S>                          <C>        <C>        <C>
Business Unit                Char            5     CCSBB for Broadband and
                                                   CCSDV for Video
-----------------------------------------------------------------------------
Customer id                  Char            3     Provider ID (PID)
-----------------------------------------------------------------------------
Consolidated Invoice #       Char           13     CCS Monthly Inv #
-----------------------------------------------------------------------------
Invoice Date                 Date           10     Date Invoice is created
-----------------------------------------------------------------------------
Due Date                     Date           10     Date Pmt is due
-----------------------------------------------------------------------------
Invoice #                    Char           12     CCS Billing System unique
                                                   ID by transaction
-----------------------------------------------------------------------------
Tracking Number              Char           30     Unique number assigned to
                                                   identify the customer
-----------------------------------------------------------------------------
Activation Date              Date           10     Activation Date
-----------------------------------------------------------------------------
DPS number                   Char           12     CCS DPS ticket #
-----------------------------------------------------------------------------
Store Number                 Char            4     must be 4
-----------------------------------------------------------------------------
Customer last name           Char           25     Broadband customer
-----------------------------------------------------------------------------
Transaction date             Date           10     In store transaction date
-----------------------------------------------------------------------------
Identifier                   Char           18     Plan ID
-----------------------------------------------------------------------------
Quantity                     Decimal      11.4     Will be 1
-----------------------------------------------------------------------------
Unit amount                  Decimal      11.4     Bounty per transaction
-----------------------------------------------------------------------------
Gross Amount                 decimal      12.2     Unit Amount x Quantity
-----------------------------------------------------------------------------
</TABLE>

4.0 Payment File

- ProviderName will provide a payment file to Circuit City for the prior
  months activations. This is required for Video due to the tiered bounty
  structure. Payment will be timed in accordance with the contract terms.

- Payment File

The payment file will be sent in the following format.

<TABLE>
<Caption>
-----------------------------------------------------------------------------
ATTRIBUTE                    DESCRIPTION        DATA TYPE         MAX LENGTH
-----------------------------------------------------------------------------
<S>                          <C>                <C>               <C>
Business Unit                                      Char               5
-----------------------------------------------------------------------------
Bank                                               Char               4
-----------------------------------------------------------------------------
Bank Code                                          Char               3
-----------------------------------------------------------------------------
ProviderName ID              Provider ID           Char               3
-----------------------------------------------------------------------------
</TABLE>

<TABLE>
<Caption>
-----------------------------------------------------------------------------
DEPOSIT DATE                                               DATE        10
-----------------------------------------------------------------------------
<S>                 <C>                                    <C>         <C>
Check #             Paper check number of ACH or wire        Char      10
                    reference number
-----------------------------------------------------------------------------
Check Dt            Date of check, ACH or wire               Date      10
-----------------------------------------------------------------------------
Check Amt           Amount of check, ACH or wire             Decimal   12.2
-----------------------------------------------------------------------------
Tracking Number     Unique number assigned to identify       Char      15
                    the order
-----------------------------------------------------------------------------
Line Number         Unique number of identify the product    Char       6
                    on the order
-----------------------------------------------------------------------------
Payment Amount      The dollar amount applicable to this     Decimal   12.2
                    customer's receivable balance. Amount
                    is never negative but maps to activity
                    indicator.
-----------------------------------------------------------------------------
</TABLE>

The first row of each payment file should be the header row. The value for
items marked with an "X" will be provided by Accounting. Deposit date will
depend on method of payment:

     - If a check is mailed this date should be three days greater than the
       check date. If payment is made through an ACH deposit, this date
       should be one day greater than the ACH initiated date.

The Check Amount should be the sum of all lines included in the payment
file.

- Circuit City Stores, Inc. -- Sample Remittance File for ProviderName

<TABLE>
<Caption>
-------------------------------------------------------------------------------------------------------------
BUSINESS  BANK  BANK  PROVIDER  DEPOSIT   CHECK#     CHECK     CHECK    TRACKING            LINE     TRANS
UNIT            CODE            DATE                  DATE     AMOUNT   NUMBER             NUMBER    AMOUNT
-------------------------------------------------------------------------------------------------------------
<S>       <C>   <C>   <C>      <C>       <C>        <C>       <C>       <C>               <C>        <C>
CCSDV     FTU   XXXX   XXX     8/7/2003  199406371  8/4/2003  384.58    42843017545020000   003120     5.49
-------------------------------------------------------------------------------------------------------------
CCSDV     FTU   XXXX   XXX     8/7/2003  199406371  8/4/2003  384.58    42843017545020000   116534   199.48
-------------------------------------------------------------------------------------------------------------
CCSDV     FTU   XXXX   XXX     8/7/2003  199406371  8/4/2003  384.58    59651392754844000   229739   149.87
-------------------------------------------------------------------------------------------------------------
CCSDV     FTU   XXXX   XXX     8/7/2003  199406371  8/4/2003  384.58    48289184222826000   319723    19.87
-------------------------------------------------------------------------------------------------------------
CCSDV     FTU   XXXX   XXX     8/7/2003  199406371  8/4/2003  384.58    15914618410500000   331659     9.87
-------------------------------------------------------------------------------------------------------------
</TABLE>

5.0 Method and Frequency of Data Transmission

<TABLE>
<Caption>
-----------------------------------------------------------------------------
DATA              FROM       METHOD                        FREQUENCY
-----------------------------------------------------------------------------
<S>             <C>          <C>                          <C>
Activity File   Provider     Circuit City's order of      Daily or Weekly
                Name         preference:
                             1) HTTPS
                             2) FTP with PGP encryption
                             3) SMTP with PGP encryption
                             Method and Details to be
                             determined
-----------------------------------------------------------------------------
</TABLE>

<TABLE>
--------------------------------------------------------------------------------
<S>              <C>       <C>                      <C>
Summary Invoice  CCS       Paper, by mail           Monthly after final activity
                                                    file is processed
--------------------------------------------------------------------------------
Detail Invoice   CCS       .csv (comma separated)   Monthly, As requested by
File                       using the agreed upon    ProviderName for
                           method of transmission   discrepancies
--------------------------------------------------------------------------------
Payment File     Provider  .csv (comma separated)    Monthly, as needed
                 Name      using the agreed upon
                           method of transmission
--------------------------------------------------------------------------------
</TABLE>

TESTING

Requirements

     - Circuit City will send test results (files, reports) created to
       ProviderName for certification. Included will be the Summary Invoice and
       the Detail Invoice File as appropriate.

     - ProviderName will send test data to Circuit City in the form of the
       "Partner Activity File" and, if a reasonable expectation exists that
       an invoice will not be paid at 100%, the "Payment File."

Methodology

     - ProviderName and Circuit City will perform integration testing. This
       process will consist of:

          1) The successful exchange of agreed upon files

          2) Using the agreed upon method of transmission

          3) The successful processing of those files within the affected
             systems.

     - Upon completion of integration testing, Circuit City and ProviderName
       will participate in the end to end system testing. This testing will
       follow transactions from serviceability queries through to payment
       and/or cancellation.

Certification

     - The development teams of both parties will certify integration testing.

     - Certification for system testing will require the acceptance of the end
       users and Corporate Business Sponsors of the reconciliation process for
       both parties.

                 Clearwire/Circuit City Confidential Information

  Not to be disclosed without written permission of Clearwire and Circuit City

                                                                         Page 17

<PAGE>

                                         EXHIBIT F
                                    EQUIPMENT AGREEMENT

THIS EQUIPMENT AGREEMENT ("Agreement") is made a part of and is hereby
incorporated into the Co-Marketing Agreement (the "Co-Marketing Agreement")
between Circuit City Stores, Inc. and its affiliates, having its principal place
of business at 9950 Mayland Drive, Richmond, Virginia, USA, 23221("Circuit
City") and Clearwire LLC having its principal place of business at 5808 Lake
Washington Blvd. NE, Suite 300, Kirkland, WA 98033 ("Clearwire"), which became
effective on Sept. 6, 2006. This Agreement is intended to set forth the terms
and conditions under which Clearwire will provide certain equipment (set forth
on Attachment 1, as may be amended from time to time) (the "Equipment") to
Circuit City; Circuit City will then provide the Equipment to Subscribers, which
the Subscribers lease directly from Clearwire. Terms used in this Agreement, but
not defined in this Agreement, have the meaning given in the Co-Marketing
Agreement

With respect to Equipment, the following terms shall supplement the terms of the
Co-Marketing Agreement

1. RESERVATION OF RIGHTS AND TITLE. Title to the Equipment is at all times
reserved to Clearwire. Circuit City agrees to cooperate with Clearwire in
effecting the protections afforded under Sections 9-103(d), 9-109 (a)(4) and 9-
319 of the Uniform Commercial Code as adopted and in effect (or parallel
protections, if the Uniform Commercial Code is not in effect) in each state in
which such a filing is necessary to effect such protections, to the extent
applicable under this Agreement; provided, however, Circuit City makes no
representation or warranty that Clearwire's interests in the Equipment will be
"perfected" as that term is defined in Article 9 of the Uniform Commercial Code,
however Circuit City shall not encumber such equipment nor interfere with such
perfected interest. Circuit City agrees to execute UCC-1 financing statements or
such other form as may be appropriate for the relevant state, provided that
Clearwire shall be responsible for preparation of such financing statements and
for the filing of such financing statements and payment of all applicable filing
and preparation costs. The parties acknowledge that the transaction described in
this Agreement is not a "consignment" within the meaning of the Uniform
Commercial Code. Circuit City shall take delivery of the Equipment from
Clearwire from time to time in accordance with this Agreement. Circuit City may
only distribute Equipment to Subscribers in a Clearwire service area (which
shall be subject to a sale or lease arrangement directly between Clearwire and
the Subscriber). The price for the Equipment shall be determined by Clearwire
and shall be stated in the equipment lease agreement between Clearwire and the
Subscriber (the "Equipment Lease Agreement"). Circuit City may not sell the
Equipment

2. LEASE OF EQUIPMENT. In accordance with the terms of the Co-Marketing
Agreement, Circuit City will register Subscribers for the Services. As part of
the registration process, each Subscriber will enter into an Equipment Lease
Agreement between the Subscriber and Clearwire. The lease price of the Equipment
shall be determined by Clearwire, in its sole discretion. Upon completion of the
registration process, Circuit City will give the leased equipment to the
Subscriber. In order to track Equipment in Circuit City's possession, Circuit
City will assign a stock-keeping unit to the Equipment. The Equipment will show
a price tag of $300.00 but will net to $0.01 upon a Subscriber's registration
for the Services; the $0.01 "price" will not be charged to Subscribers and is
caused by a point of sale systems limitation that prohibits the processing of
free tickets.

3. INVOICES; PAYMENT; ALLOWANCES. All transactions (e.g., purchase orders and
invoices) shall be conducted via Electronic Data Interchange (EDI). At
appropriate intervals, as determined by Circuit City, Circuit City will issue a
purchase order to Clearwire requesting additional Equipment. Upon receipt of a
purchase order, Clearwire will ship the requested Equipment pursuant to the
Circuit City Vendor Supply Chain Agreement dated June 9, 2006 and submit a
corresponding invoice to Circuit City that contains quantity and stock-keeping
unit information. Notwithstanding the terms on any purchase order or any
invoice, Circuit City and Clearwire agree that the Equipment will be provided at
no cost to Circuit City, and at all times thereafter, Clearwire shall continue
to retain title to the Equipment. Notwithstanding any term in any agreement
entered into between Circuit City and Clearwire in the event of a recall of
Equipment Clearwire will use commercially reasonable efforts to satisfy any
purchase

                 Clearwire/Circuit City Confidential Information

  Not to be disclosed without written permission of Clearwire and Circuit City

                                                                         Page 18

<PAGE>

order issued by Circuit City, however Circuit City acknowledges and agrees that
complete fulfillment may not be possible and that in such instance Clearwire
shall not be in breach of any agreement for failure to completely satisfy any
purchase due to such circumstances. Circuit City shall ensure that its
merchandise receipt system automatically matches each invoice to the
corresponding Equipment delivery and purchase order issued by Circuit City. Any
discrepancies (e.g., shortages) identified by Circuit City will be reconciled
with Clearwire each month to assure that the parties agree to the correct
inventory of Equipment held by Circuit City. The parties will at this time make
any necessary corrections to their records concerning invoices and quantities.

4. INVENTORY AUDITS. Clearwire may audit Circuit City's distribution centers
pertaining solely to the subject matter of this Agreement no more than 1 times
per calendar quarter, provided that Circuit City shall be given seven (7) days
written notice, and further provided that the audit shall take place at Circuit
City's facilities during normal business hours. Costs of the audit shall be
borne by Clearwire, provided that if a five percent (5%) or greater discrepancy
is found in either amounts owed or Equipment inventory, Circuit City will
reimburse the reasonable and documented costs of such audit in addition to any
moneys owed.

5. TAXES. Because the Equipment is not being sold by Circuit City to the
Subscribers, Circuit City will NOT be responsible for the collection and
remittance of sales, use, or lease taxes to the proper taxing authorities;
Clearwire shall be solely responsible for any such collection and remittance of
sales, use or lease taxes to the proper taxing authorities. Clearwire will be
responsible for paying any personal property taxes relating to the Equipment in
Circuit City's possession; provided that the parties will cooperate to minimize
the amount of such personal property taxes. Furthermore, Clearwire agrees to
indemnify, defend and hold harmless Circuit City and its affiliates, and each of
their officers and directors against any penalty, additional tax or interest
that may be assessed or levied as a result of the failure to timely collect or
pay any tax, or to file any return, form or information statement that may be
required by any governmental agency. Provided, however, that Clearwire shall not
be obligated to indemnify Circuit City in the event that (i) Clearwire was not
timely notified of the claim or potential claim, and/or (ii) such claim arises
out Circuit City's process or procedures relating to the sale or accounting of
Equipment as set forth in Section 2. Circuit City shall not report the Equipment
as property of Circuit City. Each party shall be responsible for reporting its
own income derived from this Agreement and for payment of its own income taxes.

6. SHIPMENTS. Clearwire will ship the Equipment to Circuit City's designated
shipping address (e.g., distribution centers and/or stores) at Clearwire's risk
and expense. Clearwire shall be responsible for making shipping arrangements,
scheduling, tracking, proof of delivery, tracing, and obtaining insurance for
loss or damage while Equipment is in transit, and filing freight claims for loss
and/or damage. If expedited shipment becomes necessary, in the reasonable
opinion of both parties, due to the fault or delay of Clearwire, then Clearwire
shall pay the costs of such expedited shipments to either Circuit City's
distribution centers or via drop ships to Circuit City's stores, as requested by
Circuit City. If expedited shipment becomes necessary, in the reasonable opinion
of both parties, due to the fault or delay of Circuit City, then Clearwire
agrees to ship product, freight collect, to either Circuit City's distribution
centers, or stores via drop ship, as requested by Circuit City; Circuit City
shall then chargeback Clearwire the difference between the standard ground
shipping costs and the expedited shipping costs. The carrier (not Clearwire)
shall invoice Circuit City in this latter freight collect situation. Clearwire
agrees not to include freight charges on any invoices under any circumstances.

7. RETURN OF GOODS. Circuit City has 100% return rights with respect to the
Equipment, whether in cases of defectives, obsoletes, slow-moving Equipment,
upon termination or experation of this Agreement or the Co-Marketing Agreement,
or otherwise. Except as otherwise expressly set forth in this Agreement, Circuit
City agrees to arrange and pay for return shipments. Notwithstanding the
foregoing, Circuit City reserves the right to return, at Clearwire's expense,
any Equipment for which a claim is made that alleges that the Equipment (1)
infringes any alleged patent, design, trade name, trademark, copyright, right of
privacy, or any other tangible or intangible property rights, or (2) is not
manufactured, packaged and labeled in accordance with industry standards and/or
all applicable laws, ordinances, rules and regulations by governmental
departments, bodies and agencies governing and/or restricting the receipt and
sale of Equipment by the undersigned Circuit City, or (3) has caused injury to
person or property. In addition, Clearwire agrees to pay the cost of return
shipments of substantially defective product. Equipment that is defective (which
includes but is not limited to Equipment that is returned without the box, with
an opened box, or with a damaged box) shall be the responsibility of Clearwire,
and may be returned to

                 Clearwire/Circuit City Confidential Information

  Not to be disclosed without written permission of Clearwire and Circuit City

                                                                         Page 19

<PAGE>

Clearwire unless otherwise mutually agreed. In all cases, Clearwire agrees to
provide a return authorization ("RA") within 48 hours of request submitted to
Clearwire in accordance with Clearwire's procedures.

8. FURTHER OBLIGATIONS OF CIRCUIT CITY.

     a. Circuit City will pay Clearwire Three Hundred Dollars ($300.00) (the
"Agreed Cost') for each unit of Equipment of the type listed on Attachment 1
that is lost, stolen or damaged while in Circuit City's possession, less any
applicable discounts, allowances or other valid off set amounts. Notwithstanding
the foregoing, Circuit City agrees to use commercially reasonable efforts to
protect and preserve the Equipment that is in its care, custody or control,
wherever located. Circuit City further agrees to maintain all-risk property
insurance in an amount adequate to fully insure all Equipment in its care,
custody or control, wherever located, in an amount not less than $5 Million, and
will name Clearwire.

     b. Circuit City agrees to deliver to Subscribers, in accordance with
Clearwire's instructions and activation procedures, Equipment to be used by
Subscribers for their use of the Services. Circuit City may only offer Equipment
that is approved by Clearwire. Circuit City agrees to cooperate with Clearwire
in order to maintain a mutually agreed upon inventory of Equipment that is
sufficient, in, to meet reasonably anticipated demand by Subscribers that
Circuit City enrolls for the Services. From the time of delivery of the
Equipment to Circuit City's location until delivery to a Subscriber in
accordance with this Agreement, Circuit City will store all Equipment delivered
to Circuit City in a safe and secure location, all at Circuit City's expense.
Prior to delivery to a Subscriber in accordance with mutually agreed
authorization procedures, the Equipment may upon mutual agreement be upgraded or
otherwise modified by Clearwire. Upon Clearwire's reasonable demand, Circuit
City will ship all or any portion of the Equipment to Clearwire, at Clearwire's
expense; provided, however, Clearwire shall not pull any Equipment from Circuit
City for the purpose of supplying Equipment to another Clearwire reseller or
representative. Clearwire will have the right, from time to time, to sell,
lease, or otherwise dispose of, all or any potion of the Equipment to a third
party, at prices and on terms established by Clearwire in its sole discretion,
and Clearwire will have no obligation to share any proceeds from such sale with
Circuit City.

9. TERM; TERMINATION. The term of this Agreement shall commence on the Effective
Date, and shall continue until expiration or termination of the Co-Marketing
Agreement, and shall automatically renew on the same terms applicable to the
Co-Marketing Agreement. Termination shall not affect the parties' respective
outstanding obligations.

                 Clearwire/Circuit City Confidential Information

  Not to be disclosed without written permission of Clearwire and Circuit City

                                                                         Page 20

<PAGE>

ATTACHMENT-1 TO EQUIPMENT AGREEMENT

(Equipment to be leased to Members)

<TABLE>
<CAPTION>
DESCRIPTION OF EQUIPMENT       AGREED COST
------------------------       -----------
<S>                            <C>
SKU # RSU 2570-FV (LX Model)     $300.00
Product Description:
</TABLE>

                 Clearwire/Circuit City Confidential Information

  Not to be disclosed without written permission of Clearwire and Circuit City

                                                                         Page 21

<PAGE>

                                    EXHIBIT G

                                CLEARWIRE STORES

This Exhibit G sets forth the definition and management of Circuit City Stores
in which Circuit City is authorized and shall Market and sell the Services (the
"Selected Circuit City Stores"). Any Circuit City store located in a Clearwire
coverage area will become a Selected Circuit City Store. Initial launch will
include a minimum of 36 stores. Future Clearwire markets and subsequent new
Selected Circuit City Stores will be identified through a shared "Master Store
List" posted on a secure site accessible by both parties. Clearwire shall give
Circuit City at least sixty (60) days prior written notice of new market
availability and Circuit City shall market and sell the Services in such
markets.

                 Clearwire/Circuit City Confidential Information

  Not to be disclosed without written permission of Clearwire and Circuit City

                                                                         Page 22<PAGE>

                                                                   EXHIBIT 10.42

                                                                  EXECUTION COPY

                           PURCHASE AND SALE AGREEMENT

                                 by and between

                        NEXTEL SPECTRUM ACQUISITION CORP.

                                       and

                         CLEARWIRE SPECTRUM HOLDINGS LLC

                             Dated October 24, 2005

[* * * Portions of this Exhibit have been omitted and filed separately with the
Securities and Exchange Commission as part of an application for confidential
treatment pursuant to the Securities Act of 1933, as amended]
<PAGE>

                                TABLE OF CONTENTS
<TABLE>
<CAPTION>
                                                                                PAGE
<S>                                                                             <C>
ARTICLE 1 DEFINITIONS........................................................      1

     Section 1.1 Definitions.................................................      1
     Section 1.2 Other Terms.................................................      4

ARTICLE 2 PURCHASE AND SALE OF ASSETS........................................      5

     Section 2.1 Purchase and Sale...........................................      5
     Section 2.2 Excluded Assets.............................................      5
     Section 2.3 Liabilities.................................................      6

ARTICLE 3 PURCHASE PRICE; CLOSING; ALLOCATIONS...............................      6

     Section 3.1 Purchase Price..............................................      6
     Section 3.2 Closing and Supplemental Closings...........................      6
     Section 3.3 Closing Deliveries by Seller................................      7
     Section 3.4 Closing Deliveries by Buyer.................................      8
     Section 3.5 Allocation of Expenses; Closing Statement...................      8
     Section 3.6 Allocation of Purchase Price................................     10

ARTICLE 4 REPRESENTATIONS AND WARRANTIES OF SELLER...........................     10

     Section 4.1 Authorization...............................................     10
     Section 4.2 Enforceability..............................................     10
     Section 4.3 No Conflicts or Consents....................................     10
     Section 4.4 FCC Licenses................................................     11
     Section 4.5 Spectrum Leases.............................................     12
     Section 4.6 Litigation..................................................     12
     Section 4.7 Broker......................................................     13
     Section 4.8 Taxes.......................................................     13
     Section 4.9 Seller Adjacent Interleaved Channels........................     13

ARTICLE 5 REPRESENTATIONS AND WARRANTIES OF BUYER............................     13

     Section 5.1 Authorization...............................................     13
     Section 5.2 Enforceability..............................................     13
     Section 5.3 No Conflicts or Consents....................................     13
     Section 5.4 Litigation..................................................     13
     Section 5.5 Broker......................................................     14
     Section 5.6 Funds Available.............................................     14

ARTICLE 6 COVENANTS AND OTHER AGREEMENTS.....................................     14

     Section 6.1 Consummation of Transactions................................     14
     Section 6.2 Certain Notices.............................................     14
     Section 6.3 Confidentiality.............................................     15
     Section 6.4 Further Assurances..........................................     16
     Section 6.5 [***] Repurchase Right......................................     16
     Section 6.6 FCC qualifications..........................................     18
</TABLE>

                                      -i-
<PAGE>

                                TABLE OF CONTENTS
                                   (continued)

<TABLE>
<CAPTION>
                                                                                PAGE
<S>                                                                             <C>
     Section 6.7 Consents....................................................     18
     Section 6.8 Interference Consents.......................................     18
     Section 6.9 Certain Affirmative Covenants...............................     19
     Section 6.10 Certain Negative Covenants.................................     19
     Section 6.11 Access.....................................................     19
     Section 6.12 Publicity..................................................     19
     Section 6.13 Transfer Taxes; FCC Filing Fees............................     19
     Section 6.14 Non-Solicitation of Lessors................................     19

ARTICLE 7 CONDITIONS TO CLOSING..............................................     20

     Section 7.1 Conditions to the Obligations of Both Parties...............     20
     Section 7.2 Conditions to the Obligations of Seller.....................     20
     Section 7.3 Conditions to the Obligations of Buyer......................     21

ARTICLE 8  TERMINATION.......................................................     22

     Section 8.1 Termination.................................................     22
     Section 8.2 Effect of Termination.......................................     23

ARTICLE 9 SURVIVAL AND REMEDIES..............................................     23

     Section 9.1 Survival....................................................     23
     Section 9.2 Seller Indemnification......................................     23
     Section 9.3 Buyer Indemnification.......................................     24
     Section 9.4 Third Party Claims..........................................     24
     Section 9.5 Other Claims................................................     26
     Section 9.6 Calculation of Losses; Limitation of Liability; Remedies....     26

ARTICLE 10 MISCELLANEOUS.....................................................     27

     Section 10.1 Entire Agreement...........................................     27
     Section 10.2 No Other Representations or Warranties.....................     27
     Section 10.3 Amendments and Waivers.....................................     27
     Section 10.4 Assignment.................................................     27
     Section 10.5 Notices....................................................     27
     Section 10.6 Governing Law..............................................     28
     Section 10.7 Attorney's Fees............................................     29
     Section 10.8 Expenses...................................................     29
     Section 10.9 Invalidity.................................................     29
     Section 10.10 Force Majeure.............................................     29
     Section 10.11 Counterparts..............................................     29
     Section 10.12 Headings..................................................     29
</TABLE>

                                      -ii-
<PAGE>

                             SCHEDULES AND EXHIBITS

Schedule 1              FCC Licenses

Schedule 2              Spectrum Leases

Schedule 3              Purchase Price Allocation

Schedule 4              [***] Option Channels

Schedule 5              Seller Adjacent Channels

Exhibit A               Form of Instrument of Assignment for Licenses

Exhibit B               Form of Assignment and Assumption for Spectrum Leases

Exhibit C               Form of Bill of Sale

Exhibit D               Form of Officer's Certificate

Exhibit E               Form of Secretary's Certificate

Exhibit F               Form of Consent to Assignment

Exhibit G               Form of Letter of No Objection

<PAGE>

                           PURCHASE AND SALE AGREEMENT

      This PURCHASE AND SALE AGREEMENT, dated October 24, 2005 (the "Effective
Date"), is entered into by and between Nextel Spectrum Acquisition Corp., a
Delaware corporation ("Seller") and Clearwire Spectrum Holdings LLC, a Nevada
limited liability company ("Buyer"). Seller and Buyer may be referred to herein
collectively as the "Parties" or individually as a "Party."

                                    RECITALS

      A. Seller holds the Federal Communications Commission ("FCC") licenses for
the operation of the Broadband Radio Service (formerly known as MMDS) ("BRS")
channels identified on Schedule 1 (the "FCC Licenses"), and the lease agreements
pursuant to which Seller leases the excess capacity on the BRS and Educational
Broadband Service (formerly known as Instructional Television Fixed Service)
("EBS") channels identified on Schedule 2 (the "Spectrum Leases").

      B. Seller desires to sell and assign to Buyer, and Buyer desires to
purchase and assume, the FCC Licenses and Spectrum Leases, all on the terms and
subject to the conditions set forth in this Agreement.

                                    AGREEMENT

      NOW, THEREFORE, in consideration of the premises and the mutual
representations, warranties, covenants, conditions and agreements hereinafter
set forth, the Parties agree as follows:

                                    ARTICLE 1
                                   DEFINITIONS

      Section 1.1 Definitions. As used in this Agreement, the following terms
shall have the meanings set forth or referenced below (applicable to both the
singular and plural forms of the terms defined):

      "Affiliate" means, with respect to any Person, any other Person that,
directly or indirectly, alone or through one or more intermediaries, controls,
is controlled by or is under common control with that Person. For purposes of
this definition, "control" (including the terms "controlling" and "controlled")
means the power to direct or cause the direction of the management and policies
of a Person, directly or indirectly, whether through the ownership of securities
or partnership or other ownership interests, or by contract or otherwise.

      "Agreement" means this Purchase and Sale Agreement and all Exhibits and
Schedules hereto, as amended, supplemented or otherwise modified from time to
time in accordance with the terms hereof.

      "Allocation Schedule" is defined in Section 3.6.

      "Assets" is defined in Section 2.1.

<PAGE>

      "Assumed Liabilities" is defined in Section 2.3.

      "Available [***] Option Channels" is defined in Section 6.5.

      "BRS" is defined in Recital A.

      "Business Day" means any day, other than a Saturday or Sunday, on which
commercial banks and foreign exchange markets are open for business in New York,
New York.

      "Business Partner" is defined in Section 6.3(b).

      "Business Partner NDA" is defined in Section 6.3(b).

      "Buyer" is defined in the preamble.

      "Claim" means any claim asserted by any Person (including any Party)
against a Party in respect of which payment may be sought from the other Party
under Section 9.2 or Section 9.3 hereof.

      "Closing" is defined in Section 3.2(a).

      "Closing Conditions" is defined in Section 3.2(a).

      "Closing Date" is defined in Section 3.2(a).

      "Code" means the Internal Revenue Code of 1986, as amended, and the
corresponding provisions of any future internal revenue law.

      "Consents" means all consents and approvals of Governmental Authorities or
other Person (other than a Party) necessary to authorize, approve or permit the
Parties hereto to consummate the Transactions, including, without limitation,
the consents (if any) of the lessors under the Spectrum Leases, if required to
assign such Leases in accordance with the terms of this Agreement.

      "Damages" means any and all losses, claims, demands, liabilities,
obligations, actions, suits, orders, statutory or regulatory compliance
requirements, or proceedings asserted by any Person, and all damages, costs,
expenses, assessments, judgments, recoveries and deficiencies, including
interest, penalties, investigatory expenses, consultants' fees, and reasonable
attorneys' fees and costs, of every kind and description, contingent or
otherwise.

      "Damages Dispute" is defined in Section 9.4(c).

      "EBS" is defined in Recital A.

      "Effective Date" is defined in the preamble.

      "Excluded Assets" is defined in Section 2.2.

      "Excluded Liabilities" is defined in Section 2.3.

                                     Page 2
<PAGE>

      "FCC" is defined in Recital A.

      "FCC Licenses" is defined in Recital A.

      "FCC Rules" means Title 47 of the Code of Federal Regulations, as amended
at any time and from time to time, and FCC published decisions issued pursuant
to such regulations.

      "Final Order" means an action by the FCC (i) which action has not been
reversed, stayed enjoined, set aside, annulled or suspended, (ii) in relation to
which no request for stay, motion or petition for reconsideration or rehearing,
application or request for review, or notice of appeal or other administrative
or judicial petition for review (collectively, an "Appeal") is pending, and
(iii) as to which the prescribed time for filing an Appeal, and for the entry of
orders staying, reconsidering, or reviewing on the FCC's or such other
regulatory authority's own motion has expired.

      "Governmental Authority" means a Federal, state or local court,
legislature, governmental agency (including the United States Department of
Justice), commission or regulatory or administrative authority or
instrumentality.

      "Law" means applicable common law and any statute, ordinance, code or
other law, rule, permit, permit condition, regulation, order, decree, technical
or other standard, requirement or procedure enacted, adopted, promulgated,
applied or followed by any Governmental Authority.

      "Lien" means any mortgage, lien, pledge, charge, security interest, right
of first refusal or right of others therein, restrictions, options, claims or
encumbrance of any nature whatsoever, except for liens for taxes not yet due and
payable.

      "May 18, 2004 NDA" is defined in Section 6.3.

      "Parties" or "Party" is defined in the preamble.

      "Person" means any general partnership, limited partnership, limited
liability company, corporation, joint venture, trust, business trust,
Governmental Authority, cooperative, association, other entity, or individual,
and the heirs, executors, administrators, legal representatives, successors, and
assigns of such person (by merger or otherwise) as the context may require.

      "Property Taxes" means ad valorem or real or personal property taxes,
assessments, and similar charges payable to a Governmental Authority with
respect to the Assets, including any penalties, additions, fines or interest
thereon and any liability to another Person for such charges by reason of
contract or as a successor or transferee.

      "Prorated Expense Items" is defined in Section 3.5(a).

      "Purchase Price" is defined in Section 3.1.

      "Remaining Assets" is defined in Section 3.2(b).

                                     Page 3
<PAGE>

      "Selected [***] Option Channels" is defined in Section 6.5.

      "Seller" is defined in the preamble.

      "Seller Adjacent Channels" is defined in Section 6.8(a).

      "Spectrum Leases" is defined in Recital A.

      "Sprint Nextel" is defined in Section 6.5(a).

      "Supplemental Closing" is defined in Section 3.2(b).

      "Supplemental Closing Date" is defined in Section 3.2(c).

      "Tax" or "Taxes" means any taxes, assessment, duties, fees, levies,
imposts, deductions, or withholdings, including income, gross receipts, ad
valorem, value added, excise, real or personal property, asset, sales, use,
license, payroll, transaction, capital, net worth and franchise taxes, estimated
taxes, withholding, employment, social security, workers compensation, utility,
severance, production, unemployment compensation, occupation, premium, windfall
profits, transfer and gains taxes, or other governmental charges of any nature
whatsoever, imposed by any Governmental Authority, and any liabilities with
respect thereto, including any penalties, additions to tax, fines or interest
thereon and includes any liability for Taxes of another Person by contract, as a
transferee or successor, or by reason of Treasury Regulations Section 1.1502-6.

      ["***"] is defined in Section 6.5(a).

      ["***] Availability Notice" is defined in Section 6.5.

      ["***] Option" is defined in Section 6.5.

      ["***] Option Channels" is defined in Section 6.5.

      ["***] Option Notice" is defined in Section 6.5.

      ["***] Plan" is defined in Section 6.5(a).

      ["***] Purchase Price" is defined in Section 6.5.

      "Transactions" means the transactions contemplated by this Agreement.

      "Transition" means the transition of the 2.5-2.7 GHz band channels to a
new spectrum plan pursuant to Sections 27.1230 through 27.1235 of the FCC Rules.

      "Transfer Taxes" means sales, use, stamp, recording, transaction-related
excise, or similar transfer taxes, fees and charges. For the avoidance of doubt,
Transfer Taxes do not include any Tax measured by net income, profit, or gain of
any Person.

      Section 1.2 Other Terms. Other capitalized terms may be defined elsewhere
in this Agreement and, unless otherwise indicated, shall have such meaning
throughout this Agreement.

                                     Page 4
<PAGE>

All references to "$" and dollars shall be deemed to refer to United States
currency unless otherwise specifically provided herein. All references to "true
and complete" copies of specified documents, means true and complete copies of
such documents, together with all material notices, waivers, amendments,
modifications and supplements thereto.

                                    ARTICLE 2
                           PURCHASE AND SALE OF ASSETS

      Section 2.1 Purchase and Sale. On the terms and subject to the conditions
of this Agreement, at the Closing (or, as applicable, Supplemental Closing),
Seller shall sell, assign, transfer, convey and deliver to Buyer or Buyer's
designee(s), and Buyer shall purchase from Seller all of Seller's right, title
and interest as of the Closing Date (or, as applicable, Supplemental Closing
Date) in and to the following assets (collectively the "Assets") free and clear
of all Liens:

            (a) The FCC Licenses;

            (b) The Spectrum Leases;

            (c) Subject to Section 3.5, all credits, prepaid expenses, advance
      payments, security deposits and other prepaid items that relate to any of
      the Assets set forth in subsections (a), (b), (d) or (e) of this Section
      2.1 as of the Closing (or, as applicable, Supplemental Closing);

            (d) All rights, claims, causes of action, rights to payment or to
      enforce payment and credits to the extent relating to any of the Assets
      set forth in subsections (a), (b), (c) or (e) of this Section 2.1 or
      anything that would have been a part of such Assets, but for any
      destruction of such assets, including any such items arising under
      insurance policies (or, if not assignable or transferable, all of the
      Seller and its Affiliate's rights under such insurance policies with
      respect to such assets) and all guarantees, warranties, indemnities and
      similar rights in favor of Seller or its Affiliates in respect of the
      Assets, but not to the extent relating to any Excluded Assets or Excluded
      Liabilities; and

            (e) Copies of the FCC Licenses, Spectrum Leases, and other records,
      files and documents of Seller and in Seller's possession relating to any
      of the Assets set forth in subsections (a), (b), (c) or (d) of this
      Section 2.1 , including all material correspondence with the lessors under
      the Spectrum Leases (in all cases, in any form or medium).

      Section 2.2 Excluded Assets. The Assets shall not include the Excluded
Assets. As used herein, the term "Excluded Assets" means all the properties,
assets, goodwill and rights of Seller or its Affiliates of whatever kind and
nature, real or personal, tangible or intangible, that are owned, leased,
licensed or otherwise held or controlled by Seller or its Affiliates on the
Closing Date (or, as applicable, Supplemental Closing Date) that are not
specifically identified in Section 2.1. For the avoidance of doubt, the
following shall be Excluded Assets: (a) all cash or cash equivalents of Seller
or its Affiliates; (b) all rights of Seller under this Agreement and the other
agreements and instruments executed and delivered in connection with the
Transactions; and (c) the name "Sprint Nextel" or any variation thereof, and any
trademarks, trade names, logos or symbols related thereto.

                                     Page 5
<PAGE>

      Section 2.3 Liabilities. On the terms and subject to the conditions of
this Agreement, Buyer shall assume, effective as of the Closing (or, as
applicable, Supplemental Closing), all liabilities of Seller or its Affiliates
under the Assets that arise, are incurred, or are required to be performed from
and after the Closing (or, as applicable, Supplemental Closing) (the "Assumed
Liabilities"), and from and after the Closing (or, as applicable, Supplemental
Closing) with respect to the Assets being sold as of said Closing or
Supplemental Closing, Buyer shall pay, perform and discharge when due the
Assumed Liabilities. Except for the Assumed Liabilities, Buyer shall not assume,
or be obligated or liable for, any liabilities of Seller, or any of its
Affiliates, predecessors, assignors, or transferors, including without
limitation any liabilities under the Assets incurred, accrued and/or to be
performed under the terms thereof on or before the Closing Date (or, as
applicable, Supplemental Closing Date) (the "Excluded Liabilities"), whether in
connection with the Transactions, or otherwise, all of which shall be retained
and paid, performed and discharged when due by Seller or one of Seller's
Affiliates.

                                   ARTICLE 3
                      PURCHASE PRICE; CLOSING; ALLOCATIONS

      Section 3.1 Purchase Price. Subject to Sections 3.2 and 3.5, the purchase
price for the Assets (the "Purchase Price ") shall be the aggregate amount
of [***]

      Section 3.2 Closing and Supplemental Closings.

            (a) Closing. The closing (the "Closing") shall occur within five (5)
      Business Days (or at such other time as the Parties may mutually agree or
      as required under FCC Rules) following the date that the applicable
      conditions to closing set forth under Article 8 (the "Closing Conditions")
      have been satisfied or waived by the appropriate Party with respect to at
      least [***] of the FCC Licenses and Spectrum Leases, as determined, in
      each case, by reference to the values assigned to such assets in Schedule
      3. The Parties shall promptly notify each other in writing of the
      satisfaction or waiver of the Closing Conditions required for the Closing
      as described in this Section 3.2(a). The date on which the Closing occurs
      is referred to herein as the "Closing Date."

            (b) Effect of Partial Closing. If, at the time of the Closing, the
      Closing Conditions have not been satisfied with respect to all of the
      Assets, then: (i) subject to Section 3.2(d) the Parties shall consummate
      the Closing with respect to the Assets for which the Closing Conditions
      have been satisfied, (ii) the Parties shall continue to seek to satisfy
      the Closing Conditions with respect to all remaining Assets (the
      "Remaining Assets"); (iii) for purposes of the Closing, the Purchase Price
      shall be reduced by the amount allocated to all Remaining Assets on
      Schedule 3; and (iv) the Parties shall effect one or more supplemental
      closings (each a "Supplemental Closing") for the Remaining Assets in
      accordance with Section 3.2(c).

            (c) Supplemental Closings. As and when the Closing Conditions are
      satisfied or waived by the appropriate Party after the Closing with
      respect to any Remaining Asset, then, on the last Business Day of each
      calendar quarter (or such other date as may be mutually agreed by the
      Parties): (i) Seller shall sell, assign, transfer, convey and deliver

                                    Page 6
<PAGE>

      to Buyer such Remaining Assets for which the Closing Conditions have been
      satisfied or waived; and (ii) Buyer shall pay to Seller the amounts set
      forth in Schedule 3 with respect to the Remaining Assets conveyed to Buyer
      at such Supplemental Closing. The date on which any Supplemental Closing
      occurs is referred to herein as a "Supplemental Closing Date."

            (d) Related Assets. Notwithstanding anything to the contrary in this
      Agreement, if any Asset (other than any FCC License or Spectrum Lease) is
      used in relation to any Remaining Asset that is not assigned to Buyer at
      the Closing, then such Asset shall not be transferred at the Closing and
      shall instead be assigned, transferred and delivered to Buyer together
      with the related FCC License or Spectrum Lease that is a Remaining Asset
      at the applicable Supplemental Closing.

            (e) Final Supplemental Closing Date. Notwithstanding the foregoing
      or anything to the contrary in this Agreement, no Party shall have any
      obligation to satisfy any Closing Conditions or effect any Supplemental
      Closing with respect to any Remaining Asset after September 27, 2007

      Section 3.3 Closing Deliveries by Seller. At the Closing and, as
applicable, at each Supplemental Closing Seller shall deliver to Buyer:

            (a) A duly executed Instrument of Assignment for FCC Licenses
      substantially in the form attached hereto as Exhibit A for the FCC
      Licenses to be assigned at such Closing or Supplemental Closing, as
      applicable;

            (b) A duly executed Assignment and Assumption for Spectrum Leases,
      substantially in the form attached hereto as Exhibit B for the Spectrum
      Leases to be assigned at such Closing or Supplemental Closing, as
      applicable;

            (c) A duly executed Bill of Sale substantially in the form attached
      hereto as Exhibit C for the Assets (other than FCC Licenses and Spectrum
      Leases) to be transferred at such Closing or Supplemental Closing, as
      applicable;

            (d) The Officer's Certificate required to be delivered pursuant to
      Sections 7.3(a) and (b) substantially in the form attached hereto as
      Exhibit D;

            (e) A Secretary's Certificate substantially in the form attached
      hereto as Exhibit E;

            (f) The Consents of the lessors under the Spectrum Leases that will
      be assigned to Buyer at the Closing (or, as applicable, the Supplemental
      Closing) and are required to effectuate such assignment under the terms of
      such Spectrum Leases, which Consents shall be substantially in the form
      attached hereto as Exhibit F; and

            (g) Such other documents and instruments of transfer, in form and
      substance reasonably acceptable to the Parties and their counsel, as may
      be necessary to effect the Transactions.

                                    Page 7
<PAGE>

      Section 3.4 Closing Deliveries by Buyer. At the Closing and, as
applicable, at each Supplemental Closing Buyer shall deliver to Seller:

            (a) The Purchase Price, as adjusted in accordance with Sections 3.2
      and 3.5 (or, in the case of a Supplemental Closing, the payment required
      by Section 3.2(c) as adjusted in accordance with Section 3.5), payable in
      immediately available funds via wire transfer to an account designated by
      Seller;

            (b) A duly executed Instrument of Assignment for FCC Licenses
      substantially in the form attached hereto as Exhibit A for the FCC
      Licenses to be assigned at such Closing or Supplemental Closing, as
      applicable;

            (c) A duly executed Assignment and Assumption for Spectrum Leases,
      substantially in the form attached hereto as Exhibit B for the Spectrum
      Leases to be assigned at such Closing or Supplemental Closing, as
      applicable;

            (d) The Officer's Certificate required to be delivered pursuant to
      Sections 7.2(a) and (b), substantially in the form attached hereto as
      Exhibit D;

            (e) A Secretary's Certificate substantially in the form attached
      hereto as Exhibit E; and

            (f) Such other documents and instruments of transfer, in form and
      substance reasonably acceptable to the Parties and their counsel, as may
      be necessary to effect the Transactions.

      Section 3.5 Allocation of Expenses; Closing Statement.

            (a) Subject to Section 3.5(c), on the Closing Date (or, as
      applicable, Supplement Closing Date), those items of expenses and accounts
      payable specifically referred to in Section 3.5(b) in relation to the
      Assumed Liabilities and are paid or payable before and after the Closing
      Date (or, as applicable, Supplement Closing Date) on an annual, quarterly,
      monthly or other regular periodic basis ("Prorated Expense Items") shall
      be prorated as of the Closing Date (or, as applicable, Supplement Closing
      Date) with respect to the particular Assets being sold as of the Closing
      Date (or as applicable, Supplemental Closing Date) and apportioned, such
      that (i) Buyer will receive the economic benefit or burden, as applicable,
      of all such items after the Closing Date (or, as applicable, Supplement
      Closing Date), and (ii) Seller shall receive the economic benefit or
      burden, as applicable, of all such items for the period prior to, and
      including, the Closing Date (or, as applicable, Supplement Closing Date).
      After the Closing Date (or, as applicable, Supplement Closing Date), (x)
      if Buyer should receive any bills or accounts or any reimbursement in
      relation to Prorated Expense Items that are attributable in whole to the
      period prior to, and including, the Closing Date (or, as applicable,
      Supplement Closing Date), then Buyer shall promptly forward the same to
      Seller (for payment, in the case of any such bills or accounts), (y) if
      Seller should receive any bills or accounts or any reimbursement in
      relation to the Prorated Expense Items that are attributable in whole to
      the period after the Closing Date (or, as applicable, Supplement Closing
      Date), then Seller shall promptly forward the same to Buyer (for payment,
      in the

                                    Page 8
<PAGE>

      case of any such bills or accounts) and (z) if any Party should receive
      any bills or accounts or any reimbursements in relation to the Prorated
      Expense Items that are attributable in part to the period prior to, and
      including, the Closing Date (or, as applicable, Supplement Closing Date),
      and in part to the period after the Closing Date, the amount thereof shall
      be apportioned between Seller, on the one hand, and Buyer, on the other
      hand, as of the Closing Date (or, as applicable, Supplement Closing Date),
      based on the number of days in such period falling prior to and including
      the Closing Date (or, as applicable, Supplement Closing Date), on the one
      hand, and after the Closing Date (or, as applicable, Supplement Closing
      Date), on the other hand. In the case of bills or accounts referred to in
      clause (z), the party receiving the same shall be required to pay only
      such portion of such bill or account for which it is responsible in
      accordance with this Section 3.5(a).

            (b) The following expense items shall be prorated in the manner
      contemplated by Section 3.5(a): (i) regular periodic rent or lease
      payments (including prepaid rent and rent payable in arrears) payable
      under the Spectrum Leases; (ii) annual FCC regulatory fees in relation to
      the FCC Licenses; and (iii) Property Taxes (if any).

            (c) Not less than ten (10) Business Days prior to the Closing Date
      (or, as applicable, Supplement Closing Date), Seller and Buyer will
      jointly prepare a preliminary closing statement containing their good
      faith calculation of the prorations provided for in Section 3.5(a). If
      final bills or accounts in relation to any Prorated Expense Items or rent
      receivable referred to in Section 3.5(a) are not available or have not
      been issued prior to that date for any Prorated Expense Item, or rent
      receivable that is required to be prorated as contemplated in Section
      3.5(a), then Seller shall estimate the amount of each such item in good
      faith, and such estimate shall be reflected in the preliminary closing
      statement. The amount payable by Buyer at the Closing (or, as applicable,
      Supplemental Closing) shall be increased or decreased to reflect the net
      amount owing between the Parties as shown on such preliminary closing
      statement, using such estimates where necessary. Final adjustment between
      the Parties as to any estimated item used in the preparation of the
      preliminary closing statements shall be made as soon as reasonably
      practicable after the Closing (or, as applicable, Supplement Closing)
      after such item becomes final. Payments in connection with such final
      adjustment or otherwise necessary to reconcile amounts between the parties
      in accordance with Section 3.5(a) will be due within thirty (30) days of
      written notice from the Party entitled to payment.

      Section 3.6 Allocation of Purchase Price. Within thirty (30) days after
the Closing Date or Supplemental Closing Date (as applicable), Buyer shall
deliver to Seller a schedule allocating the Purchase Price as adjusted in
accordance with Sections 3.2 and 3.5 (or, in the case of a Supplemental Closing,
the payment required by Section 3.2(c) as adjusted in accordance with Section
3.5), and reflecting the Assumed Liabilities, among the Assets acquired at the
Closing or Supplemental Closing (as applicable) in accordance with the
principles of Section 1060 of the Code and the regulations promulgated
thereunder (each an "Allocation Schedule"). Seller shall have fifteen (15) days
from its receipt of the Allocation Schedule to notify Buyer, in writing, that
Seller disputes one or more items reflected on the Allocation Schedule, which
notice shall include a detailed explanation of the basis for the dispute. If
Seller does not provide such notice of objection, Seller shall be deemed to
accept the Allocation Schedule as submitted by

                                    Page 9
<PAGE>

Buyer. If Seller does provide such notice of objection, the Parties shall
negotiate in good faith to resolve such dispute. If the Parties fail to resolve
all such disputes within thirty (30) days following Buyer's receipt of such
notice of objection, the Parties shall engage a nationally-recognized,
independent accounting firm (whose fees shall be shared equally by the two
Parties) with respect to the disputed items on the Allocation Schedule. The
determination of such independent accounting firm on the disputed items shall be
final and binding on the Parties (and any of their Affiliates). The Parties
shall prepare and file all applicable tax forms and returns, including if
necessary Internal Revenue Service Form 8594, consistent with the finalized
Allocation Schedules. Each Party shall timely and properly prepare, execute,
file and deliver all such documents, forms and other information as the other
Party may reasonably request to prepare or evaluate the Allocation Schedules.

                                   ARTICLE 4
                    REPRESENTATIONS AND WARRANTIES OF SELLER

      Seller represents and warrants to Buyer as follows:

      Section 4.1 Authorization. Seller is lawfully existing and in good
standing under the laws of the State of Delaware, and has all requisite power
and authority to enter into this Agreement and to perform the obligations to be
performed by it under this Agreement. The execution and delivery of this
Agreement and each other agreement, document, instrument or certificate
contemplated by this Agreement, and the performance by Seller of its obligations
hereunder, have been duly authorized by all necessary action on the part of
Seller.

      Section 4.2 Enforceability. This Agreement and each other agreement,
document or instrument or certificate contemplated by this Agreement has been
duly executed and delivered by Seller and is a legal, valid and binding
obligation of Seller, enforceable against Seller in accordance with its terms,
subject to bankruptcy, insolvency, fraudulent transfer, reorganization,
moratorium and similar Laws of general applicability relating to or affecting
creditors' rights and to general equity principles.

      Section 4.3 No Conflicts or Consents. Neither the execution, delivery and
performance by Seller of this Agreement, nor the consummation of the
Transactions by Seller, will (i) constitute, with or without the giving of
notice or passage of time or both, a breach, violation or default by Seller or
any of its Affiliates, create a Lien, or give rise to any right of termination,
modification, cancellation, prepayment or acceleration with respect to the
Assets, under (x) any Law or FCC License (subject to receipt of Consent of the
FCC) or (y) any note, bond, mortgage, indenture, lease, agreement or other
instrument, in each case which is applicable to any of the Assets; (ii) require
any Consent, other than the Consent of the FCC and the applicable lessors under
the Spectrum Leases as set forth on Schedule 2; or (iii) violate any Law,
judgment, order or decree by which Seller is bound, except, in each case, for
any conflicts, Consents or violations that, individually or in the aggregate,
will not have a material adverse effect on any of the Assets or Seller's ability
to consummate the transactions.

      Section 4.4 FCC Licenses.

                                    Page 10
<PAGE>

            (a) Schedule 1 sets forth for each FCC License the true and correct
      (i) name of the licensee; (ii) FCC call sign, (iii) authorized channels,
      (iv) expiration date, and (v) market where the facilities are authorized.
      True and complete copies of the FCC Licenses have been delivered to Buyer.
      To the knowledge of Seller, there is no condition outside of the ordinary
      course imposed on any of the FCC Licenses by the FCC except those that are
      either set forth on the face of the FCC Licenses, as issued by the FCC, or
      are contained in applicable FCC Rules. The FCC Licenses are free and clear
      of all Liens and are unimpaired by any acts or omissions of Seller, its
      Affiliates and their respective officers, directors, agents, assignees and
      licensees. The FCC Licenses have been granted to Seller by Final Order and
      are in full force and effect.

            (b) There is not pending or, to the knowledge of Seller, threatened
      against Seller with respect to the FCC Licenses any application, action,
      petition, objection or other pleading, or any proceeding with the FCC or
      any other Governmental Authority, which (i) questions or contests the
      validity of, or seeks the revocation, forfeiture, non-renewal or
      suspension of, any of the FCC Licenses, (ii) seeks the imposition of any
      modification or amendment with respect to any of the FCC Licenses, (iii)
      would adversely affect the ability of Seller to consummate the
      Transactions or (iv) seeks the payment of a fine, sanction, penalty,
      damages or contribution in connection with the use of any of the FCC
      Licenses. To the knowledge of Seller, there are no facts or circumstances
      existing that would give rise to any such application, action, petition,
      objection or other pleading, or proceeding with the FCC or any other
      Governmental Authority. There is no unsatisfied adverse FCC order or
      ruling outstanding against Seller with respect to any of the FCC Licenses.

            (c) Seller has not agreed to accept or allow any electromagnetic
      interference from any other FCC licensees, permittees or applicants with
      respect to any of the FCC Licenses, and no such licensees, permittees or
      applicants have agreed to accept electromagnetic interference from Seller
      or with respect to its facilities.

            (d) Seller is in compliance with all applicable Laws except for any
      non- compliance that, individually or in the aggregate, will not have a
      material adverse effect on the FCC Licenses, or on Seller's ability to
      consummate the Transactions. Since acquisition by Seller of the FCC
      Licenses, Seller has complied in all material respects with FCC Laws
      applicable to the FCC Licenses, including without limitation the
      Communication Act of 1934, as amended, and with all of the terms and
      conditions of the FCC Licenses. All material documents required to be
      filed at any time by Seller with the FCC with respect to the FCC Licenses,
      as applicable, have been timely filed or the time period for such filing
      has not lapsed. All such documents filed since the date that the FCC
      Licenses were acquired by Seller are correct in all material respects. All
      amounts owed to the FCC in connection with the FCC Licenses since the date
      that the FCC Licenses were acquired by Seller have been timely paid.

            (e) Since the date that the FCC Licenses were assumed by Seller, the
      facilities subject to the FCC Licenses for which certification or
      modification of completion of construction has been filed with the FCC are
      operating and have been operating, in material compliance with the FCC
      Licenses and FCC Rules.

                                    Page 11
<PAGE>

      Section 4.5 Spectrum Leases. Schedule 2 sets forth the true and correct:
(i) expiration date for each Spectrum Lease, (ii) name of the lessor or other
counterpart for each Spectrum Lease, (iii) FCC call sign covered each Spectrum
Lease; (iv) authorized channels and market for each Spectrum Lease, (v) the
expiration date of the FCC license covered by each Spectrum Lease, and (vi) the
monthly, quarterly or annual rent, as applicable, payable, as of the Effective
Date of this Agreement, under each Spectrum Lease. True and complete copies of
all Spectrum Leases have been delivered or made available to Buyer. Each of the
Spectrum Leases is in full force and effect and enforceable by Seller in
accordance with its terms. Seller has valid and marketable leasehold interest in
each of the Spectrum Leases, free and clear of all Liens. Seller has not
assigned, pledged, transferred, or otherwise disposed of or granted any Lien on
its rights, titles and interests under any of the Spectrum Leases to any other
Person, nor, to the knowledge of Seller, has any other party to the Spectrum
Leases so assigned, pledged, transferred, granted any Lien on, or otherwise
disposed of any of its rights, title and interests thereunder. Neither Seller
nor, to the knowledge of Seller, any other party to any of the Spectrum Leases
is in material breach or material default thereunder. To the knowledge of
Seller, no condition exists or event has occurred, since entering into or
assuming the Spectrum Leases, as applicable, and is continuing as of the
Effective Date of this Agreement which, with or without the lapse of time or the
giving of notice, or both, would constitute a material default by Seller under
any Spectrum Leases or give rise to any Lien or right of termination,
modification, cancellation, prepayment, suspension, limitation, revocation or
acceleration against Seller under any such Spectrum Leases. Seller has not
received any notice of termination, or intent to terminate, with respect to any
Spectrum Leases.

      Section 4.6 Litigation. There is no legal proceeding now in progress or
pending or, to the knowledge of the Seller, threatened against Seller with
respect to any of the Assets, nor to the knowledge of Seller does there exist
any basis therefor. Seller is not subject to any order, writ, injunction or
decree of any court or any federal, state, municipal or other domestic or
foreign Governmental Authority which would affect the Assets, any rights of
Seller in and to the Assets or Seller's ability to consummate the Transactions.

      Section 4.7 Broker. Neither Seller nor any of its Affiliates has employed
any broker or finder or incurred any liability for any brokerage or finding fees
or commissions in connection with the Transactions.

      Section 4.8 Taxes, (i) None of the Assets are subject to any material
Liens for Taxes; (ii) no material claims have been asserted in writing for any
Taxes in respect of any Seller Asset that have not been paid in full; (iii) none
of the Assets secure any indebtedness, the interest on which is tax-exempt under
Section 103 (a) of the Code; and (iv) none of the Assets is a "tax- exempt use
property" within the meaning of Section 168(h) of the Code.

      Section 4.9 Seller Adjacent Interleaved Channels. Schedule 5 sets forth a
true and complete list of the channels owned or leased by Seller or its
Affiliates as of the Effective Date that are adjacent to and interleaved with
any of the channels under the FCC Licenses or Spectrum Leases.

                                    Page 12
<PAGE>

                                   ARTICLE 5
                    REPRESENTATIONS AND WARRANTIES OF BUYER

      Buyer hereby represents and warrants to Seller as follows:

      Section 5.1 Authorization. Buyer is lawfully existing and in good standing
under the Laws of the State of Nevada, and has all requisite power and authority
to enter into this Agreement and to perform the obligations to be performed by
it under this Agreement. The execution and delivery of this Agreement and each
other agreement, document, instrument or certificate contemplated by this
Agreement, and the performance by Buyer of its obligations hereunder, have been
duly authorized by all necessary action on the part of Buyer.

      Section 5.2 Enforceability. This Agreement and each other agreement,
document or instrument or certificate contemplated by this Agreement to which
they are a party has been duly executed and delivered by Buyer, and is a legal,
valid and binding obligation of Buyer, enforceable against Buyer, as applicable
in accordance with its terms, subject to bankruptcy, insolvency, fraudulent
transfer, reorganization, moratorium and similar Laws of general applicability
relating to or affecting creditors' rights and to general equity principles.

      Section 5.3 No Conflicts or Consents. Neither the execution, delivery and
performance by Buyer of this Agreement, nor the consummation of the Transactions
by Buyer, will (i) require any Consent, other than the Consent of the FCC; or
(ii) violate any Law, judgment, order or decree by which Buyer is bound, except,
in each case, for any conflicts, Consents or violations that, individually or in
the aggregate, will not have a material adverse effect on Buyer's ability to
consummate the transactions.

      Section 5.4 Litigation. Buyer is not subject to any order, writ,
injunction or decree of any court or any federal, state, municipal or other
domestic or foreign Governmental Authority which would affect the Buyer's
ability to consummate the Transactions.

      Section 5.5 Broker. Buyer nor any of its respective Affiliates has
employed any broker or finder or incurred any liability for any brokerage or
finding fees or commissions in connection with the Transactions.

      Section 5.6 Funds Available. Buyer has available to it as of the date
hereof and will have available to it as of the Closing and each Supplemental
Closing immediately available funds necessary to consummate the transactions
contemplated hereby and to pay all expenses of Buyer in connection therewith.
Buyer has delivered to Seller evidence, reasonably satisfactory to Seller, that
demonstrates Buyer's ability to consummate the Transaction.

                                   ARTICLE 6
                         COVENANTS AND OTHER AGREEMENTS

      Section 6.1 Consummation of Transactions. From and after the Effective
Date, each Party shall use its reasonable best efforts to take, or cause to be
taken, all actions, and to do, or cause to be done, all things necessary and
consistent with applicable Law to perform its obligations under this Agreement
and to consummate the Transactions as soon as reasonably practicable. Each Party
shall use commercially reasonable efforts to prevent or promptly remedy

                                    Page 13
<PAGE>

any breach of any of its representation, warranties, covenants or agreements
contained in this Agreement.

      Section 6.2 Certain Notices. Each Party shall promptly notify the other
Parties in reasonable detail in writing:

            (a) upon the satisfaction or waiver of the Closing Conditions
      required for the Closing as described in Section 3.2(a);

            (b) to the knowledge of the notifying Party, upon the commencement
      of, or the impending or threatened commencement of, or upon obtaining
      knowledge of any facts that would give rise to, any claim, action or
      proceeding brought to enjoin the consummation of the Transactions, or
      against or relating to (i) the notifying Party or its properties or
      assets, which could materially adversely affect the Transactions or its
      ability to perform its obligations hereunder, or (ii) their respective
      Assets or their use;

            (c) to the knowledge of the notifying Party, upon the occurrence of,
      or the impending or threatened occurrence of, or upon obtaining knowledge
      of any facts that would give rise to, any event which could cause or
      constitute a material breach of any of its representations, warranties,
      covenants or agreements contained in this Agreement; and

            (d) upon the occurrence or existence of any event, condition,
      circumstance or state of facts known to the notifying Party, which has had
      or could have a material adverse effect on the Transactions or its ability
      to perform its obligations hereunder, or could materially adversely affect
      their respective Assets or their use.

      Section 6.3 Confidentiality.

            (a) May 18, 2004 NDA. This Agreement and any information or
      documents provided by any Party to this Agreement to any other Party, or
      developed by the Parties in the course of completing the actions
      contemplated by this Agreement shall be treated as confidential and
      proprietary and shall be subject to the confidentiality and nondisclosure
      letter agreement dated May 18, 2004, by and between Nextel Communications,
      Inc. and Clearwire Corporation and its successors and subsidiaries (as
      amended, the "May 18, 2004 NDA"). Each of the Parties hereto agrees that
      the Parties (on behalf of themselves and their respective successors and
      subsidiaries) shall be bound by and enjoy all of the benefits of the May
      18, 2004 NDA as if original parties thereto. Notwithstanding anything to
      the contrary in the May 18, 2004 NDA, for purposes of this Agreement only,
      the May 18, 2004 NDA shall be deemed to survive (1) with respect to all
      Information (as defined in the May 18, 2004 NDA) relating to the
      transactions contemplated by Section 6.5, until such transactions have
      been consummated or the rights described in Section 6.5 have expired or
      been terminated in accordance with this Agreement and (2) with respect to
      all other Information relating to this Agreement, for a period of two
      years from the date hereof.

            (b) Limited Disclosure to Business Partners. Notwithstanding Section
      6.3(a) or the May 18, 2004 NDA, each Party may disclose this Agreement to
      its actual and prospective investors, lenders, acquirers, merger partners
      or other business partners (each

                                    Page 14
<PAGE>

      a "Business Partner") if: (1) the Business Partner reasonably needs to
      know such information to pursue a business relationship that the
      disclosing Party considers material consistent with such Party's business
      practices (including, without limitation, for the purposes of due
      diligence on the disclosing Party); and (2) prior to disclosing this
      Agreement, the disclosing Party: (i) causes the Business Partner to
      execute and deliver to the disclosing Party a nondisclosure agreement (the
      "Business Partner NDA") that (a) requires the Business Partner to maintain
      the confidentiality of the terms of this Agreement on terms at least as
      restrictive as those set forth in Sections 1, 3 and 4 of the May 18, 2004
      NDA and (b) explicitly designates the non-disclosing Party as an intended
      third-party beneficiary with the right to enforce the Business Partner NDA
      (including, without limitation, the right to seek any equitable remedy to
      enjoin the improper disclosure of any confidential information); and (ii)
      provides written notice to the non-disclosing Party that the disclosing
      Party has disclosed this Agreement to a Business Partner (without
      disclosing the identity of the Business Partner) in accordance with the
      terms of this Section 6.3(b); provided, however, that (except as otherwise
      provided in the May 18, 2004 NDA) under no circumstances shall any Party
      disclose to any Person Schedule 3 or the allocations set forth therein.
      Notwithstanding the foregoing, the Parties acknowledge that the May 18,
      2004 NDA provides that nothing in such agreement "preclude[s] disclosures
      necessary to comply with accounting standards and applicable securities
      and other laws and regulations of the Securities and Exchange Commission
      ("SEC") or with the regulations of any applicable securities exchange" and
      that the Parties and/or their Affiliates may be required to disclose the
      financial terms of this Agreement in such Party's or its Affiliates'
      consolidated financial statements or in the footnotes thereof.
      Notwithstanding the foregoing, neither Party shall be required to enter
      into a Business Partner NDA with a Business Partner provided that such
      Party has, prior to the Effective Date and consistent with such Party's
      normal business practices, entered into a non-disclosure agreement with
      that Business Partner, which non-disclosure agreement will (i) at least
      require the Business Partner to maintain the confidential information
      received by such Party in confidence and to protect against the
      unauthorized disclosure of the confidential information disclosed to such
      Business Partner on terms consistent with the disclosing Party's normal
      business practices and (ii) not include any provision which expressly
      excludes third party beneficiaries. Such non-disclosure agreements will be
      considered a Business Partner NDA for the purposes of this Section 6.3.

            (c) Duty to Enforce Business Partner NDAs. If any Party discloses
      any confidential information to any Business Partner in accordance with
      Section 6.3(b), such disclosing Party shall ensure that all of its
      Business Partners maintain the confidentiality of such information in
      accordance with the terms of this Section 6.3 and the Business Partner
      NDA. If any Party, in good faith and based on facts known to it,
      determines that a Business Partner has, or may have, disclosed any
      information in breach of any Business Partner NDA or in violation of this
      Section 6.3, then such Party shall deliver written notice of such breach
      to the other Party, which notice will include specific information with
      respect to the breach and any information the notifying Party has with
      respect to the identity of the Person making the unauthorized disclosure.
      Upon receiving the such notice from the notifying Party: (1) the Parties
      shall immediately cooperate to mutually identify the Business Partner, if
      any, responsible for the unauthorized disclosure based on

                                    Page 15
<PAGE>

      reasonable evidence available to the Parties; (2) the disclosing Party
      shall provide to the notifying Party a true and complete copy of the
      Business Partner NDA between the breaching Business Partner and the
      disclosing Party immediately after the applicable Business Party is
      identified, if at all, by the Parties; and (3) the disclosing Party shall
      use commercially reasonable and diligent efforts to prevent further
      unauthorized disclosures by the breaching Business Partner.

      Section 6.4 Further Assurances. The Parties shall cooperate in good faith
and exercise their reasonable best efforts to obtain all required Consents and
to finalize and execute any and all other documents or agreements necessary to
complete the Transactions on or prior to the Closing Date (or, as applicable,
Supplemental Closing Date). Each Party shall, upon request, execute and deliver
such documents and take such actions as may reasonably be requested by the other
Party in order to effectuate the purposes of this Agreement.

      Section 6.5 [***] Repurchase Right.

            (a) [***] Option Subject to Section 6.5(b), Seller shall have the
      option (the "[***] Option") to repurchase from Buyer (and Buyer hereby
      agrees to sell) certain of the FCC Licenses and/or Spectrum Leases listed
      on Schedule 4 (the "[***] Option Channels") if, within the [***] following
      the Effective Date, Sprint Nextel Corporation, or its successor, assign or
      Affiliate (together "Sprint Nextel"), has: (1) purchased, or irrevocably
      committed to purchase, equipment in an aggregate amount equal to or
      greater than [***] to implement a [***] wireless broadband system
      utilizing the EBS and BRS spectrum (the [***] Plan"); and (2) begun to
      implement the [***] Plan by commercially deploying such system [***]

            (b) Limitation of [***] Option. Notwithstanding Section 6.5(a),
      Seller shall not have the right to repurchase any of the [***] Option
      Channels that: (1) Buyer or any of its successors, assigns or Affiliates
      have transferred, leased or subleased (or have entered into a written
      agreement or letter of intent to transfer, lease or sublease such [***]
      Option Channels) to an unaffiliated third party; (2) are being used by
      Buyer or any of its successors, assigns or Affiliates for services in
      their respective businesses; or (3) have been identified in writing by
      Buyer or any of its successors, assigns or Affiliates (whether in a
      deployment plan, engineering plan or other operational document used in
      such business) to be deployed for services in their respective businesses
      at any time within the [***] following the date of the [***] Option
      Notice.

            (c) Exercise of [***] Option. To exercise the [***] Option, on or
      prior to [***] following the Effective Date Sprint Nextel shall provide
      written notice (the "[***] Option Notice") to Buyer of Seller's election
      to repurchase some or all of the [***] Option Channels, which notice shall
      (a) specify the [***] Option Channels Seller desires to repurchase and (b)
      certify to Buyer that the conditions to the [***] Option set forth in
      Section 6.5(a) have been satisfied and that the [***] Plan is continuing.
      Within thirty (30) days after receiving the [***] Option Notice, Buyer
      shall provide written notice (the "[***] Availability Notice") to Sprint
      Nextel of those [***]

                                    Page 16
<PAGE>

      Option Channels identified in the [***] Option Notice which satisfy the
      conditions specified in Section 6.5(b) above and are available for
      repurchase by Seller in accordance with this Section 6.5 (the "Available
      [***] Option Channels"). Seller shall have thirty (30) days following the
      receipt of the [***] Availability Notice to select and notify Buyer, in
      writing of which Available [***] Option Channels Seller wishes to acquire
      (the "Selected [***] Option Channels"). Buyer shall sell, subject to the
      approval by the FCC and/or the applicable lessors under the Spectrum
      Leases, the Selected [***] Option Channels to Sprint Nextel at a purchase
      price (the "[***] Purchase Price") equal to [***]. The Parties will
      implement the [***] Option purchase through a purchase agreement with
      customary terms, and the closing of the purchase of the [***] Option
      Channels shall occur as soon as practicable after the Parties have
      received the required Consents from the FCC or any lessor under the
      Spectrum Leases. At such closing, (i) Seller shall pay the [***] Purchase
      Price to Buyer in immediately available funds via wire transfer to an
      account designated by Buyer and (ii) Buyer shall execute and deliver to
      Sprint Nextel customary transfer documents. Notwithstanding anything
      herein to the contrary, including the [***] Option, Buyer shall have the
      right to transfer, lease, sublease or otherwise dispose of, or enter into
      an agreement to do any of the foregoing, any of the [***] Option Channels
      prior to the Seller's delivery [***] Option Notice with respect to such
      [***] Option Channels pursuant to this Section 6.5 and in such event
      Seller's option to repurchase shall not apply to the applicable [***]
      Option Channels.

      Section 6.6 FCC Qualifications. Seller hereby covenants and agrees that
prior to and through the Closing (or, as applicable, the final Supplemental
Closing) it shall maintain all necessary qualifications to hold and to renew, as
necessary, the FCC Licenses.

      Section 6.7 Consents. The Parties shall use commercially reasonable
efforts and shall cooperate to prepare and promptly file with Governmental
Authorities and other Persons all applications, notices, petitions and other
documentation necessary to obtain the Consents. The Parties agree to cooperate
to consolidate and file all applications, notices and petitions to be filed with
the FCC in as few applications reasonably as possible. Each Party shall furnish
to the other Party all information concerning such Party and its Affiliates
reasonably required for inclusion in any application to be made in connection
with the Transactions or to determine compliance with FCC Rules. Subject to
Section 3.2(e), from the Effective Date and through the Closing (or, as
applicable, the final Supplemental Closing), each Party shall use its best
efforts to obtain Consents to assignment to the other Party of all of the Assets
requiring Consent (including, without limitation, the Consents required to
assign the Spectrum Leases as identified on Schedule 2).

      Section 6.8 Interference Consents.

                                    Page 17
<PAGE>

            (a) Upon Buyer's (or its Affiliate's) request, the Seller will
      execute and deliver, or, if not the licenses, use commercially reasonable
      efforts to cause the lessor under the application spectrum lease to
      execute and deliver, to the Buyer a letter of no objection (substantially
      in the form attached hereto as Exhibit G and reasonably satisfactory to
      requesting Party's counsel) from the applicable Seller Adjacent
      Channel(s) (as defined below) that allows Buyer or its Affiliates to
      construct and operate the FCC Licenses and Spectrum Leases as a part of
      Buyer's (or its Affiliate's) two-way broadband wireless system until the
      Transition is complete in the market for such channels, provided such
      operation is otherwise consistent with FCC Rules.

            (b) For purposes of this Section 6.8, "Seller Adjacent Channels"
      means the channels identified on Schedule 5 and the channels under the FCC
      licenses and spectrum leases actually transferred to Seller pursuant to
      the Purchase and Sale Agreement, dated as of the date hereof, by and
      between Seller and Fixed Wireless Holdings, LLC.

            (c) If required by FCC Rules in connection with the transactions
      contemplated by Section 6.8(a), Seller will, file, or consent Buyer
      filing, such letter of no objection with the FCC in support of a request
      for Special Temporary Authority or other application requesting
      operational authority from the FCC.

            (d) The Parties will cooperate to negotiate a mutually agreeable
      separate expanded interference agreement as soon as practicable after the
      Effective Date.

      Section 6.9 Certain Affirmative Covenants. From the Effective Date and
through the Closing (or, as applicable, the final Supplemental Closing), Seller
shall (a) carry on its business with respect to the Assets as currently
conducted and only in the ordinary course of business; (b) preserve the Assets
in good standing and in full force and effect; (c) comply with all Laws
applicable to the Assets; and (d) maintain in full force and effect the Assets,
in each case, to the extent necessary to Seller's ability to consummate the
Transactions.

      Section 6.10 Certain Negative Covenants. From the Effective Date and
through the Closing (or, as applicable, the final Supplemental Closing), Seller
shall not enter into any agreement, arrangement or understanding to, or
otherwise, negotiate, offer or commit to: (a) sell, transfer, assign, lease or
dispose of the Assets or of the spectrum subject to the FCC Licenses and
Spectrum Leases or any interests therein or portion thereof; (b) create, incur
or suffer to exist any Lien or other liability on the Assets or the spectrum
subject to the FCC Licenses and Spectrum Leases or any interest therein; or (c)
amend any Spectrum Lease without the prior written consent of Buyer.

      Section 6.11 Access. From the Effective Date to the Closing (or, as
applicable, the final Supplemental Closing), Buyer, its representatives and
advisors shall, during normal business hours have the right of reasonable access
to and inspection of the books, records, and other documents specifically
related to the Assets, as may be reasonably requested of and upon reasonable
notice to Seller.

      Section 6.12 Publicity. Subject to the terms of the May 18, 2004 NDA, no
Party shall issue any press release or public announcement concerning this
Agreement or the Transactions

                                    Page 18
<PAGE>

without obtaining the prior written approval of the other Party hereto, which
approval will not be unreasonably withheld or delayed.

      Section 6.13 Transfer Taxes; FCC Filing Fees. Buyer shall pay in a timely
manner all Transfer Taxes and FCC filing fees resulting from or payable in
connection with the assignment and transfer of the Assets to Buyer pursuant to
this Agreement, in each case regardless of the Person on whom such Transfer
Taxes and/or FCC filing fees are imposed by Law. The Parties shall reasonably
cooperate in providing information and executing and delivering documents
necessary to reduce or eliminate such Transfer Taxes. Where Seller is required
by law to remit the Transfer Taxes to the applicable Government Authority, Buyer
shall promptly pay over the Transfer Taxes due and payable to Seller for timely
remittance to the Government Authority. Where the relevant Law imposes a
Transfer Tax on Seller but permits payment by Buyer, Buyer shall pay the
Transfer Taxes to the applicable Government Authority and promptly provide a
receipt, or other documentary evidence of payment as reasonably requested by
Seller, to Seller.

      Section 6.14 Non-Solicitation of Lessors.

            (a) Seller Non-Solicitation Obligations. For so long as required
      pursuant to Section 6.14(c) and except as provided in Section 6.14(b),
      Seller and its Affiliates (i) shall immediately cease all direct and
      indirect communications with the lessors under the Spectrum Leases and
      (ii) shall not encourage or incite (by promising any financial
      consideration, promising any business relationship or otherwise) any third
      party to have any direct or indirect communications with the lessors under
      the Spectrum Leases.

            (b) Permitted Communications. Notwithstanding Section 6.14(a),
      Seller and its Affiliates may communicate with any lessor (i) for the
      purposes of obtaining the Consent of such lessor, (ii) as required in the
      ordinary course of carrying on its obligations under such Spectrum Leases,
      or (iii) to the extent that such communications do not relate to the
      Spectrum Leases.

            (c) Non-Solicitation Period. Seller's (and its Affiliate's)
      obligations under this Section 6.14 shall commence upon the Effective Date
      and continue until the earlier of (i) the date that this Agreement is
      terminated in accordance with Article 9, (ii) nine (9) months after the
      Closing or the Supplemental Closing at which the applicable Spectrum Lease
      is conveyed to the other Party, and (iii) September 30, 2007, with respect
      to any Spectrum Lease not conveyed at a Closing or Supplemental Closing on
      or before such date.

                                   ARTICLE 7
                             CONDITIONS TO CLOSING

      Section 7.1 Conditions to the Obligations of Both Parties. Each Party's
obligation to consummate the Transactions is subject to the satisfaction or
waiver, on or prior to Closing Date (or, as applicable, any Supplemental Closing
Date), of each of the following conditions, as applicable to the Party
specified:

            (a) The FCC shall have approved the application for consent to the
      assignment of the FCC Licenses and Spectrum Leases to the applicable Party
      (or its

                                    Page 19
<PAGE>

      designee) without conditions adverse to such Party, such approval shall
      have become a Final Order, and such Final Order shall be in full force and
      effect without modifications.

            (b) All other notices, filings and Consents required to be made or
      obtained prior to the Closing (or, as applicable, Supplemental Closing) by
      either Party or any of its respective Affiliates with any Governmental
      Authority in connection with the execution and delivery of this Agreement
      and the consummation of the Transactions shall have been made or obtained.

            (c) No preliminary or permanent injunction or other order, decree or
      ruling issued by a Governmental Authority, nor any Law promulgated or
      enacted by any Governmental Authority, shall be in effect that would
      impose material limitations on the ability of either Party to consummate
      the Transactions.

      Section 7.2 Conditions to the Obligations of Seller. Seller's obligation
to consummate the Transactions contemplated by this Agreement are subject to the
satisfaction or waiver, on or prior to the Closing Date (or, as applicable,
Supplemental Closing Date), of each of the following conditions:

            (a) The representations and warranties of Buyer contained herein
      shall be true and correct in all material respects (except for
      representations and warranties that are qualified as to materiality, which
      shall be true and correct) as of the Closing (or, as applicable,
      Supplemental Closing) as if made on and as of the Closing Date (or, as
      applicable, Supplemental Closing Date) (except that representations and
      warranties that are made as of a specific date need be so true and correct
      only as of such date), and Seller shall have received a certificate to
      such effect dated the Closing Date (or, as applicable, Supplemental
      Closing Date) and executed by a duly authorized officer of Buyer.

            (b) The covenants and agreements of Buyer to be performed under this
      Agreement on or prior to the Closing (or, as applicable, Supplemental
      Closing) shall have been duly performed in all material respects, and
      Seller shall have received a certificate to such effect dated the Closing
      Date (or, as applicable, Supplemental Closing Date) and executed by a duly
      authorized officer of Buyer.

            (c) Buyer having delivered to Seller all of the certificates,
      documents, instruments and other items required to be delivered to Seller
      pursuant to Section 3.4, including, without limitation, Buyer's delivery
      to Seller of the Purchase Price.

      Section 7.3 Conditions to the Obligations of Buyer. Buyer's obligation to
consummate the Transactions contemplated by this Agreement are subject to the
satisfaction or waiver, on or prior to the Closing Date (or, as applicable,
Supplemental Closing Date), of each of the following conditions:

            (a) The representations and warranties of Seller contained herein
      shall be true and correct in all material respects (except for
      representations and warranties that are qualified as to materiality, which
      shall be true and correct) as of the Closing (or, as applicable,
      Supplemental Closing) as if made on and as of the Closing Date (or, as
      applicable, Supplemental Closing Date) (except that representations and
      warranties that

                                    Page 20
<PAGE>

      are made as of a specific date need be so true and correct only as of such
      date), and Buyer shall have received a certificate to such effect dated
      the Closing Date (or, as applicable, Supplemental Closing Date) and
      executed by a duly authorized officer of Seller; provided, however, that,
      with respect to the representations and warranties set forth in Sections
      4.4 and 4.5, such representations and warranties and the certificates
      relating thereto as required under this section shall only apply with
      respect to the Assets subject to the Closing (or, as applicable,
      Supplemental Closing).

            (b) The covenants and agreements of Seller to be performed under
      this Agreement on or prior to the Closing (or, as applicable, Supplemental
      Closing) shall have been duly performed in all material respects, and
      Buyer shall have received a certificate to such effect dated the Closing
      Date (or, as applicable, Supplemental Closing Date) and executed by a duly
      authorized officer of Seller; provided, however, that, with respect to the
      covenants and/or agreements relating to specific Assets, such covenants
      and agreements and any certificates relating thereto shall only apply with
      respect to the Assets subject to the Closing (or, as applicable,
      Supplemental Closing).

            (c) Seller having delivered to Buyer, as applicable, all of the
      certificates, documents, instruments and other items required to be
      delivered to Buyer pursuant to Section 3.3.

                                   ARTICLE 8
                                  TERMINATION

      Section 8.1 Termination. This Agreement may be terminated and the
Transactions thereby abandoned at any time prior to the Closing:

            (a) by mutual written consent of Buyer and Seller;

            (b) by any Party if the Closing shall not have occurred on or before
      September 30, 2006;

            (c) by any Party if there shall be any Law, regulation or FCC Rule
      that makes consummation of the Transactions illegal or otherwise
      prohibited;

            (d) by any Party if any of the conditions to the obligations for the
      Parties set forth in Section 7.1 shall have become incapable of
      fulfillment other than as a result of a breach by the terminating Party of
      any covenant or agreement contained in this Agreement;

            (e) by Seller if any of the conditions to the obligations of Seller
      set forth in Section 7.2 shall have become incapable of fulfillment other
      than as a result of a breach by Seller of any covenant or agreement
      contained in this Agreement;

            (f) by Buyer if any of the conditions to the obligations of Buyer
      set forth in Section 7.3 shall have become incapable of fulfillment other
      than as a result of a breach by Buyer of any covenant or agreement
      contained in this Agreement;

                                    Page 21
<PAGE>

            (g) by any Party upon the material breach of a representation,
      warranty or covenant in this Agreement by the other party if such breach
      is not cured within thirty (30) days following written notice by the
      non-breaching party which notice shall describe the breach; provided,
      however, that termination by a non-breaching Party for the breach of a
      material representation and warranty as to a specific FCC License,
      Spectrum Lease or Asset shall only serve to terminate the Agreement with
      respect to such FCC License, Spectrum Lease or Asset and shall not serve
      to terminate the entire Agreement; and

            (h) by any Party, if the Transaction Agreement, dated as of the date
      hereof, by and among Seller, Buyer and Fixed Wireless Holdings LLC shall
      have been terminated in accordance with its terms other than as a result
      of a breach by terminating Party (or its Affiliates) of any covenant or
      agreement contained in such Transaction Agreement.

A Party desiring to terminate this Agreement pursuant to this Section 8.1 shall
give written notice thereof to the other Party specifying the provision hereof
pursuant to which the Agreement is terminated.

      Section 8.2 Effect of Termination. In the event of a valid termination of
this Agreement on our before the Closing, the Agreement shall become null and
void and of no further force and effect and neither Party shall have any
liability or further obligation to the other, except that:

            (a) nothing herein will relieve a Party from liability for any
      breach by such Party of this Agreement; provided, however, that, with
      respect to any breach by Seller of a representation and warranty as to a
      specific FCC License, Spectrum Lease or Asset, if such representation and
      warranty became untrue after the Effective Date through no fault of the
      Seller (or any of such Party's Affiliates, or any of their respective
      officers, directors, employees, agents, or representatives), then the sole
      remedy of the Buyer shall be to (1) terminate this Agreement solely with
      respect to such FCC License, Spectrum Lease or Asset or (2) adjust the
      Purchase Price in accordance with Section 3.2(b) based on the amount
      allocated to such FCC License, Spectrum Lease or Asset as set forth in
      Schedule 3; and

            (b) the provisions of Sections 4.7, 5.5, 6.3 and 6.12 and Articles
      8, 9 and 10 shall survive the termination of this Agreement.

For the avoidance of doubt, the May 18, 2004 NDA shall survive any termination
of this Agreement.

                                   ARTICLE 9
                             SURVIVAL AND REMEDIES

      Section 9.1 Survival. The representations and warranties and covenants and
other agreements contained in this Agreement shall survive the Closing (or, as
applicable, the Supplemental Closing) until [***] after the Closing Date (or, as
applicable, the Supplemental Closing Date) and shall expire at such time;
provided, however, that the covenants and other agreements set forth in Section
6.5 shall survive until [***] after the earlier of the date that the
transactions contemplated thereby have been consummated or the rights

                                    Page 22
<PAGE>

described therein have expired; provided, further, that the covenants and other
agreements set forth in Sections 6.3 and 6.12 and Articles 8, 9 and 10 shall
survive [***] Notwithstanding the foregoing, such representations and warranties
and covenants and other agreements shall not terminate with respect to any item
as to which the Party to be indemnified shall have, before the expiration of the
applicable survival period, previously made a bona fide claim by delivering
proper notice of such claim in accordance with Section 9.4 or Section 9.5.

      Section 9.2 Seller Indemnification. Seller shall indemnify and hold
harmless Buyer, Buyer, their respective agents, successors and assigns from and
against any and all Damages based upon, attributable to or resulting from:

            (a) except as otherwise provided herein, the failure of any
      representation or warranty of Seller as set forth in this Agreement to be
      true and correct as of the dates made;

            (b) the breach of any covenant or other agreement on the part of
      Seller under this Agreement;

            (c) the ownership and operation of the Assets prior to the Closing
      Date (or, as applicable, the Supplemental Closing Date);

            (d) any Excluded Assets or Excluded Liabilities.

      Section 9.3 Buyer Indemnification. Buyer shall indemnify and hold harmless
Seller and its agents, successors and assigns from and against any and all
Damages based upon, attributable to or resulting from:

            (a) except as provided otherwise herein, the failure of any
      representation or warranty of Buyer set forth in this Agreement to be true
      and correct as of the dates made;

            (b) the breach of any covenant or other agreement on the part of
      Buyer under this Agreement;

            (c) the ownership and operation of the Assets following the Closing
      (or, as applicable, the Supplemental Closing) provided, however [***] the
      indemnification obligation pursuant to this subsection (e) shall include
      the [***] for the time period between Closing (or, as applicable,
      Supplemental Closing) and the closing of [***] by Seller only; and

            (d) any Assumed Liabilities.

      Section 9.4 Third Party Claims.

            (a) In the event that any Claim by any third Person, the indemnified
      Party shall reasonably and promptly cause written notice of the assertion
      of any Claim of which it has knowledge which is covered by this indemnity
      to be forwarded to the indemnifying

                                    Page 23
<PAGE>

      Party. The indemnifying Party shall have the right, at its sole option and
      expense, to be represented by counsel of its choice, which must be
      reasonably satisfactory to the indemnified Party, and to defend against,
      negotiate, settle or otherwise deal with any Claim which relates to any
      Damages indemnified against hereunder; provided, however, that the
      indemnifying Party shall not, without the consent of the indemnified
      Party, enter into any settlement, compromise or discharge of a Claim that
      by its terms (i) includes injunctive or other non-monetary relief that
      adversely affects the indemnified Party in any material respect; (ii) does
      not release the indemnified Party completely in connection with such
      Claim, or (iii) would otherwise adversely affect the indemnified Party in
      any material respect. If the indemnifying Party elects to defend against,
      negotiate, settle or otherwise deal with any Claim which relates to any
      Damages indemnified against hereunder, it shall within fifteen (15) days
      (or sooner, if the nature of the Claim so requires) notify the indemnified
      Party of its intent to do so. If the indemnifying Party shall assume the
      defense of any Claim, the indemnified Party may participate, at its own
      expense, in the defense of such Claim; provided, however, that such
      indemnified Party shall be entitled to participate in any such defense
      with separate counsel at the expense of the indemnifying Party if (i) so
      requested by the indemnifying Party to participate or (ii) in the
      reasonable opinion of counsel to the indemnified Party, a conflict or
      potential conflict exists between the indemnified Party and the
      indemnifying Party that would make such separate representation advisable;
      and provided, further, that the indemnifying Party shall not be required
      to pay for more than one such counsel for all indemnified Parties in
      connection with any Claim.

            (b) If the indemnifying Party elects not to defend against,
      negotiate, settle or otherwise deal with any Claim which relates to any
      Damages indemnified against hereunder, fails to notify the indemnified
      party of its election as herein provided or disputes its obligation to
      indemnify the indemnified Party for such Damages under this Agreement, the
      indemnified Party may defend against, negotiate, settle or otherwise deal
      with such Claim; provided, however, that the indemnified Party shall not,
      without the consent of the indemnifying Party, enter into any settlement,
      compromise or discharge of a Claim that by its terms includes injunctive
      or other non-monetary relief that adversely affects the indemnifying Party
      in any material respect. If the indemnified Party defends any Claim, then
      the indemnifying Party shall reimburse the indemnified Party for the
      Damages, including without limitation, the reasonable expenses incurred by
      the indemnified Party in defending such Claim upon submission of periodic
      bills, subject to the dispute of such Damage amounts as provided in
      Section 9.4(c).

            (c) If the indemnifying Party disputes the amount of any Damages
      ("Damages Dispute") payable by the indemnifying party pursuant to Section
      9.4(b), the indemnifying Party shall notify the indemnified Party of such
      disagreement within fifteen (15) days of the receipt of the Claim.
      Thereupon, the indemnified Party and the indemnifying Party will negotiate
      in good faith and use reasonable efforts to resolve their differences with
      respect to the Damages presented in such Claim during the thirty (30) days
      following the indemnifying Party's notice of disagreement to the
      indemnified Party. In the event such dispute is not resolved upon the
      expiration of the thirty (30) day period following the indemnifying
      Party's notice of disagreement to the indemnified Party, either Party
      shall be entitled to immediately proceed to file an action in any
      appropriate court to seek such

                                    Page 24
<PAGE>

      relief that is appropriate and reasonably necessary to protect that
      Party's rights. If final adjudication of the Damages Dispute results in a
      decision in favor of the indemnifying Party, the indemnified Party shall
      not be entitled to reimbursement for any expense that may be incurred in
      defending such Damages Dispute.

            (d) The Parties agree to cooperate fully with each other in
      connection with the defense, negotiation, or settlement of any Claim by a
      third Person.

            (e) After any final judgment or award shall have been rendered by a
      court, arbitration board or administrative agency of competent
      jurisdiction and the expiration of the time in which to appeal therefrom,
      or a settlement shall have been consummated, or the indemnified Party and
      the indemnifying Party shall have arrived at a mutually binding agreement
      with respect to a Claim hereunder, the indemnified Party shall forward to
      the indemnifying Party notice of any sums due and owing by the
      indemnifying Party pursuant to this Agreement with respect to such matter.

            (f) The failure of the indemnified Party to give reasonably prompt
      notice of any Claim shall not release, waive or otherwise affect the
      indemnifying Party's obligations with respect thereto except to the extent
      that the indemnifying Party can demonstrate actual loss and prejudice as a
      result of such failure.

      Section 9.5 Other Claims. Any indemnifiable Claim hereunder that is not a
Claim by a third Person shall be asserted by the indemnified Party by promptly
delivering written notice thereof (including the basis of the Claim and the
amount thereof, if known and quantifiable) to the indemnifying Party. The
failure of the indemnified Party to give reasonably prompt notice of any Claim
shall not release, waive or otherwise affect the indemnifying Party's
obligations with respect thereto except to the extent that the indemnifying
Party can demonstrate actual loss and prejudice as a result of such failure. If
the indemnifying Party does not respond to such notice within sixty (60) days
after its receipt, it shall have no further right to contest the validity of
such claim.

      Section 9.6 Calculation of Losses; Limitation of Liability; Remedies.

            (a) The amount of any Damages for which indemnification is provided
      under this Article 9 shall be (i) net of any amounts actually recovered by
      the indemnified Party under such Party's insurance policies with respect
      to such Damages, (ii) net of any amounts actually recovered from any third
      Person (by contribution, indemnification or otherwise) with respect to
      such Damages, and (iii) adjusted for Taxes so as to put the indemnified
      Party in the same pre-tax financial position as it would have been had the
      other Party's representations and warranties hereunder been true and
      correct in all respects, the other Party's covenants and agreements been
      performed in full, and any other event giving rise to Damages had not
      occurred. Any indemnification payment made pursuant to this Article 9
      shall be treated as an adjustment to the Purchase Price for U.S. Federal
      income tax purposes.

            (b) Subject to Section 9.6(e), the aggregate indemnification
      obligations of Seller pursuant to Sections 9.2(a) and (b) shall not exceed
      the lesser of [***]

                                     Page 25
<PAGE>

      [***] or the Purchase Price actually received by Seller in accordance with
      Section 3.4(a) (as and when received), and the aggregate indemnification
      obligations of Buyer pursuant to Sections 9.3(a) and (b) shall not exceed
      [***] No Party shall be liable to the other Parties pursuant to Section
      9.2 or Section 9.3, as applicable, unless and only to the extent that the
      aggregate Damages suffered by the indemnified Party, collectively, exceeds
      [***]
            (c) Subject to Section 9.6(e), the Parties acknowledge that their
      sole and exclusive remedy for monetary damages after the Closing with
      respect to any and all claims under this Agreement (other than claims of,
      or causes of action arising from, actual fraud) shall be pursuant to the
      indemnification provisions set forth in this Article 9.

            (d) SUBJECT TO SECTION 9.6(E), IN NO EVENT SHALL ANY PARTY BE LIABLE
      FOR INDIRECT, SPECIAL, CONSEQUENTIAL OR PUNITIVE DAMAGES ARISING OUT OF A
      BREACH OF THIS AGREEMENT, EVEN IF ADVISED AT THE TIME OF BREACH OF THE
      POSSIBILITY OF SUCH DAMAGES.

            (e) Notwithstanding anything to the contrary in this Agreement, the
      provisions of Sections 9.6(b), (c), and (d) will not apply to, or in any
      way limit or restrict, any Claim by either Party for the other Party's
      breach of its obligations under Section 6.3.

                                   ARTICLE 10
                                  MISCELLANEOUS

      Section 10.1 Entire Agreement. Except for the May 18, 2004 NDA, this
Agreement constitutes the entire agreement between the Parties pertaining to the
subject matter hereof and supersedes all prior and contemporaneous agreements,
understandings, negotiations and discussions, whether oral or written, of the
Parties with respect to the subject matter hereof.

      Section 10.2 No Other Representations or Warranties. Except for the
representations and warranties set forth in Articles 4 and 5, no Party is making
any representations or warranties, written or oral, statutory, express Or
implied, in relation to the Assets, the Assumed Liabilities or the Transactions.

      Section 10.3 Amendments and Waivers. Any provision of this Agreement may
be amended or waived if, and only if, such amendment or waiver is in writing and
signed (in the case of an amendment) by Seller and Buyer or (in the case of a
waiver) by the Party against whom the waiver is to be effective. No failure or
delay by any Party in exercising any right, power or privilege hereunder shall
operate as a waiver thereof nor shall any single or partial exercise thereof
preclude any other or further exercise thereof or the exercise of any other
right, power or privilege.

      Section 10.4 Assignment. This Agreement shall be binding upon and shall
inure to the benefit of the Parties and their respective successors and
permitted assigns. This Agreement may not be assigned by either Party without
the prior written consent of the other Party, which shall not be unreasonably
withheld, conditioned or delayed, except that either Party may assign its

                                     Page 26
<PAGE>

rights under this Agreement to any direct or indirect subsidiary or affiliate
and any entity that acquires or otherwise merges or consolidates with the
assigning Party, upon delivery of written notice to the other Party.

      Section 10.5 Notices. All notices or other communications hereunder shall
be in writing and shall be deemed to have been duly given or made (i) upon
delivery if delivered personally (by courier service or otherwise), as evidenced
by written receipt or other written proof of delivery (which may be a printout
of the tracking information of a courier service that made such delivery), (ii)
upon confirmation of dispatch if sent by facsimile transmission (which
confirmation shall be sufficient if shown by evidence produced by the facsimile
machine used for such transmission), in each case to the applicable addresses
set forth below (or such other address which either Party may from time to time
specify); or (iii) the next business day if sent by overnight delivery via a
reliable express delivery service:

            If to Seller:
            Nextel Spectrum Acquisition Corp.
            [***]

            With a Copy to:

            [***]

            If to Buyer:

            Clearwire Spectrum Holdings LLC
            5808 Lake Washington Blvd. N.E.
            Suite 300
            Kirkland, WA 98033
            Attention: Benjamin G. Wolff
            Phone: 425-828-8600
            Facsimile: (425) 828-8061

            With a copy to:

            Davis Wright Tremaine LLP

                                     Page 27
<PAGE>

            2600 Century Square
            1501 Fourth Avenue
            Seattle, WA 98112
            Attention: Julie Weston, Esq.
            Phone: 206-903-3918
            Facsimile: 206-628-7699

      Section 10.6 Governing Law. This Agreement shall be governed by, and
construed in accordance with, the internal Laws of New York, without reference
to the choice of law principles thereof.

      Section 10.7 Attorney's Fees. In any legal proceeding by a Party to
enforce its rights under this Agreement against the other Party, the Party
prevailing in such proceeding will be entitled to recover its reasonable
attorney's fees and costs from the other Party.

      Section 10.8 Expenses. Except as otherwise expressly provided in this
Agreement, whether or not the Transactions are consummated, the Parties shall
bear their respective expenses (including, but not limited to, all compensation
and expenses of counsel, financial advisors, consultants, actuaries and
independent accountants) incurred in connection with this Agreement and the
Transactions.

      Section 10.9 Invalidity. In the event that any of the provisions contained
in this Agreement or in any other instrument referred to herein, shall for any
reason be held to be invalid, illegal or unenforceable in any respect, such
invalidity, illegality or unenforceability shall not affect any other provision
of this Agreement or such other instrument and such provision will be
ineffective only to the extent of such invalidity, illegality or
unenforceability, unless the consummation of the Transactions is impaired
thereby.

      Section 10.10 Force Majeure. No Party will be liable for any
nonperformance under this Agreement due to causes beyond its reasonable control
that could not have been reasonably anticipated by the non-performing Party and
that cannot be reasonably avoided or overcome; provided that the non-performing
party gives the other Party prompt written notice of such cause, and in any
event, within fifteen (15) calendar days of its discovery.

      Section 10.11 Counterparts. This Agreement may be executed and delivered
(including by facsimile transmission) in one or more counterparts, each of which
shall be deemed an original, but all of which together shall constitute one and
the same instrument.

      Section 10.12 Headings. The headings of the Articles and Sections herein
are inserted for convenience of reference only and are not intended to be a part
of or to affect the meaning or interpretation of this Agreement.

                            [SIGNATURE PAGE FOLLOWS]

                                     Page 28
<PAGE>

      IN WITNESS WHEREOF, the Parties have duly executed this Agreement as of
the date first above written.

                                        NEXTEL SPECTRUM ACQUISITION CORP.

                                        By: [***]
                                           -------------------------------------
                                        Name: [***]
                                        Title: Senior Vice President

                                        CLEARWIRE SPECTRUM HOLDINGS LLC

                                        By: /s/ Benjamin G. Wolff
                                            ------------------------------------
                                        Name: Benjamin G. Wolff
                                        Title: Executive Vice-President

                                     Page 29
<PAGE>

                                    EXHIBIT A

                  FORM OF INSTRUMENT OF ASSIGNMENT FOR LICENSES

      INSTRUMENT OF ASSIGNMENT (the "Instrument of Assignment"), dated as of
_____________________, 200____, by and between Nextel Spectrum Acquisition
Corp., a Delaware Corporation ("Assignor"), and Clearwire Spectrum Holdings LLC,
a Nevada limited liability company ("Assignee"). Capitalized terms used herein
without definition shall have the respective meanings assigned to them in the
Purchase Agreement (as defined below).

      WHEREAS, Assignor and Assignee have entered into a Purchase and Sale
Agreement (the "Purchase Agreement"), dated as of___________________________,
2005, pursuant to which, among other things, Assignor agreed to convey to
Assignee, and Assignee agreed to acquire, the FCC licenses set forth on Annex A
hereto (the "Licenses");

      WHEREAS, Assignor and Assignee have filed an application with the FCC
requesting the assignment of the Licenses to Assignee; and

      WHEREAS, the FCC has granted an application for the assignment of the
Licenses.

      NOW, THEREFORE, in consideration of the promises and the mutual
representations, warranties, covenants, conditions, and agreements in the
Purchase Agreement and hereinafter set forth, the Parties agree as follows:

            1. Assignment. Subject to the terms and conditions of the Purchase
      Agreement, for valuable consideration, receipt of which is hereby
      acknowledged, Assignor, intending to be legally bound, does hereby sell,
      assign, transfer, convey, and deliver to Assignee, its successors and
      assigns forever, all right and interest of Assignor in and to the
      Licenses, free and clear of all Liens.

            2. Terms of Purchase Agreement Control. Nothing contained in this
      Instrument of Assignment shall in any way supersede, modify, replace,
      amend, change, rescind, waive, exceed, expand, enlarge, or in any way
      affect the provisions of the Purchase Agreement, including the warranties,
      covenants, agreements, conditions and representations contained in the
      Purchase Agreement and, in general, any of the rights and remedies, and
      any of the obligations and indemnifications, of Assignor or Assignee set
      forth in the Purchase Agreement.

            3. Further Assurances. Assignor and Assignee covenant and agree, in
      connection with the Purchase Agreement and this Instrument of Assignment,
      to promptly execute and deliver all additional documents and instruments
      and perform all additional acts that, in each case, are reasonably
      necessary and desirable to effectuate and perform the provisions of this
      Instrument of Assignment, including, without limitation, the assignments
      provided for in Section 1 hereof.

            4. Miscellaneous. This Instrument of Assignment (a) is executed
      pursuant to the Purchase Agreement and may be executed in counterparts,
      each of which as so executed shall be deemed to be an original, but all of
      which together shall constitute one

                                                                       Exhibit A

<PAGE>

      instrument, (b) shall be governed by and in accordance with the internal
      Laws of the State of New York, without regard to the principles of
      conflicts of law thereof and (c) shall be binding upon and inure to the
      benefit of the Parties hereto and their respective successors and
      permitted assigns.

                                                                       Exhibit A

                                     Page 2
<PAGE>

      IN WITNESS WHEREOF, Assignor and Assignee have each caused this Instrument
of Assignment to be duly executed and delivered as of the date first above
written.

                                        NEXTEL SPECTRUM ACQUISITION CORP.

                                        By:
                                           _____________________________________
                                        Name:
                                             ___________________________________
                                        Title:
                                              __________________________________

                                        CLEARWIRE SPECTRUM HOLDINGS LLC

                                        By:
                                           _____________________________________
                                        Name: Benjamin G. Wolff
                                        Title: Executive Vice-President

                                                                       Exhibit A

                                     Page 3
<PAGE>

                                    EXHIBIT B

              FORM OF ASSIGNMENT AND ASSUMPTION FOR SPECTRUM LEASES

      THIS ASSIGNMENT AND ASSUMPTION (this "Assignment and Assumption") is
entered into effective as of the________day of_____________________, 200____, by
and between Nextel Spectrum Acquisition Corp., a Delaware Corporation
("Assignor"), and Clearwire Spectrum Holdings LLC, a Nevada limited liability
company ("Assignee"), pursuant to that certain Purchase and Sale Agreement (the
"Purchase Agreement") dated as of________________________, 2005, by and among
Assignor and Assignee and others, pursuant to which, among other things,
Assignor agreed to assign, and Assignee agreed to assume, certain of Assignor's
liabilities and obligations. Capitalized terms not otherwise defined herein
shall have the respective meanings set forth in the Purchase Agreement.

      NOW, THEREFORE, in consideration of the promises and the mutual
representations, warranties, covenants, conditions, and agreements in the
Purchase Agreement and hereinafter set forth, the Parties agree as follows:

            1. Assignment. Subject to the terms and conditions of the Purchase
      Agreement, for valuable consideration, Assignor does hereby assign, grant,
      transfer, convey, and set over unto Assignee all of Assignor's rights,
      title and interest in and to the contracts set forth on Annex A hereto
      (the "Transferred Contracts"), free and clear of all Liens.

            2. Assumption. Subject to the terms of the Purchase Agreement, for
      valuable consideration, Assignee hereby undertakes, assumes and agrees to
      perform, pay or discharge when and as due all of the Assumed Liabilities
      (including, without limitation, all liabilities of Assignor or its
      Affiliates under the Transferred Contracts that arise, are incurred, or
      are required to be performed from and after the date hereof).

            3. Terms of Purchase Agreement Control. Nothing contained in this
      Assignment and Assumption shall in any way supersede, modify, replace,
      amend, change, rescind, waive, exceed, expand, enlarge, or in any way
      affect the provisions of the Purchase Agreement, including the warranties,
      covenants, agreements, conditions and representations contained in the
      Purchase Agreement and, in general, any of the rights and remedies, and
      any of the obligations and indemnifications, of Assignor or Assignee set
      forth in the Purchase Agreement.

            4. Further Assurances. Assignor and Assignee covenant and agree, in
      connection with the Purchase Agreement and this Assignment and Assumption,
      to promptly execute and deliver all additional documents and instruments
      and perform all additional acts that, in each case, are reasonably
      necessary and desirable to effectuate and perform the provisions of this
      Assignment and Assumption, including, without limitation, the assignments
      provided for in Section 1 hereof and the assumptions provided for in
      Section 2 hereof.

            5. Miscellaneous. This Assignment and Assumption (a) is executed
      pursuant to the Purchase Agreement and may be executed in counterparts,
      each of which as so

                                                                       Exhibit B

<PAGE>

      executed shall be deemed to be an original, but all of which together
      shall constitute one instrument, (b) shall be governed by and in
      accordance with the internal Laws of the State of New York, without regard
      to the principles of conflicts of law thereof and (c) shall be binding
      upon and inure to the benefit of the Parties hereto and their respective
      successors and permitted assigns.

                                                                       Exhibit B

                                     Page 2
<PAGE>

      IN WITNESS WHEREOF, Assignor and Assignee have each caused this Assignment
and Assumption to be duly executed and delivered as of the date first above
written.

                                        NEXTEL SPECTRUM ACQUISITION CORP.

                                        By:
                                           ____________________________________
                                        Name:
                                             __________________________________
                                        Title:
                                              _________________________________

                                        CLEARWIRE SPECTRUM HOLDINGS LLC

                                        By:
                                           ____________________________________
                                        Name: Benjamin G. Wolff
                                        Title: Executive Vice-President

                                                                       Exhibit B

                                     Page 3
<PAGE>

                                    EXHIBIT C

                              FORM OF BILL OF SALE

      THIS BILL OF SALE (this "Bill of Sale") is made effective as of
the______day of ____________, 200___, by Nextel Spectrum Acquisition Corp., a
Delaware Corporation ("Grantor"), for the benefit of Clearwire Spectrum Holdings
LLC, a Nevada limited liability company ("Grantee").

      WHEREAS, Grantor and Grantee entered into that certain Purchase and Sale
Agreement (the "Purchase Agreement") dated as of_____________, 2005, pursuant to
which Grantor agreed to, among other things, sell, assign, transfer, convey and
deliver to Grantee certain assets. Capitalized terms not otherwise defined
herein shall have the respective meanings set forth in the Purchase Agreement;

      WHEREAS, Grantor and Grantee entered into that certain Instrument of
Assignment, dated as of the date hereof, whereby Grantor assigned to Grantee the
FCC licenses designated therein (the "Transferred FCC Licenses");

      WHEREAS, Grantor and Grantee entered into that certain Assignment and
Assumption, dated as of the date hereof, whereby Grantor assigned to Grantee the
contracts designated therein (the "Transferred Contracts"); and

      WHEREAS, pursuant to the terms of the Purchase Agreement, Grantor desires
to assign to Grantee all of the Assets (other than the FCC Licenses and Spectrum
Leases) that are used in relation to the Transferred FCC Licenses and/or
Transferred Contracts and not used in relation to any Asset to be conveyed to
the Grantee after the date hereof (the "Transferred Related Assets").

      NOW, THEREFORE, in consideration of the promises and the mutual
representations, warranties, covenants, conditions, and agreements in the
Purchase Agreement:

            1. Sale. For valuable consideration, Grantor hereby sells, assigns,
      transfers, conveys and delivers to Grantee all of Grantor's right, title
      and interest in, to and under the Transferred Related Assets free and
      clear of all Liens.

            2. Terms of Purchase Agreement Control. Nothing contained in this
      Bill of Sale shall in any way supersede, modify, replace, amend, change,
      rescind, waive, exceed, expand, enlarge, or in any way affect the
      provisions of the Purchase Agreement, including the warranties, covenants,
      agreements, conditions and representations contained in the Purchase
      Agreement and, in general, any of the rights and remedies, and any of the
      obligations and indemnifications, of Assignor or Assignee set forth in the
      Purchase Agreement.

            3. Miscellaneous. This Bill of Sale (a) is executed pursuant to the
      Purchase Agreement and may be executed in counterparts, each of which as
      so executed shall be deemed to be an original, but all of which together
      shall constitute one instrument, (b) shall be governed by and in
      accordance with the internal Laws of the State of New York, without regard
      to the principles of conflicts of law thereof and (c) shall be binding
      upon

                                                                       Exhibit C
<PAGE>

      the Grantor and inure to the benefit of the Grantee and their respective
      successors and permitted assigns.

      IN WITNESS WHEREOF, Grantor has caused this Bill of Sale to be duly
executed and delivered as of the date first above written.

                                              NEXTEL SPECTRUM ACQUISITION CORP.

                                              By:_______________________________
                                              Name:_____________________________
                                              Title:____________________________

                                                                       Exhibit C

                                     Page 2

<PAGE>

                                   EXHIBIT D

                         FORM OF OFFICER'S CERTIFICATE

      This OFFICER'S CERTIFICATE (this "Certificate") is made by [Nextel
Spectrum Acquisition Corp., a Delaware corporation ("Seller")][Clearwire
Spectrum Holdings LLC, a Nevada limited liability company ("Buyer")] for the
benefit of [Nextel Spectrum Acquisition Corp., a Delaware corporation
("Seller")] [Clearwire Spectrum Holdings LLC, a Nevada limited liability company
("Buyer")] pursuant to that certain Purchase and Sale Agreement, dated as
of_______________, 2005 (the "Purchase Agreement"), by and among Seller and
Buyer. Capitalized terms not otherwise defined herein shall have the respective
meanings set forth in the Purchase Agreement.

      Pursuant to Sections [7.2(a) and 7.2(b)] [7.3(a) and 7.3(b)] of the
Purchase Agreement, [Seller] [Buyer] does hereby certify that:

      1. The representations and warranties of [Seller] [Buyer] (except those
with respect to [FCC Licenses or Spectrum Leases] that are no longer legally
available to transfer through no fault of [Seller] [Buyer]) contained in the
Purchase Agreement are true and correct in all material respects (except for
representations and warranties that are qualified as to materiality, which are
true and correct) as of the date hereof (except for those representations and
warranties that were made as of a specific date need be so true and correct only
as of such date)[; [provided, however, that, with respect to the representations
and warranties set forth in Sections 4.4 and 4.5, this certificate shall only
apply with respect to the Assets subject to the [Closing] [Supplemental Closing]
that occurred on the date hereof(1)].

      2. The covenants and agreements of [Seller] [Buyer] (except those with
respect to [FCC Licenses or Spectrum Leases] that are no longer legally
available to transfer through no fault of [Seller]) to be performed under the
Purchase Agreement on or prior to the date hereof have been duly performed in
all material respects[; provided, however, that, with respect to the covenants
and/or agreements relating to specific Assets, this certificate shall only apply
with respect to the Assets subject to the [Closing] [Supplemental Closing] that
occurred on the date hereof(2)].

      IN WITNESS WHEREOF, [Seller] [Buyer] has executed and delivered this
Certificate as of this______day of_____________, 200______

                                              [Seller][Buyer]

                                              By:_______________________________
                                              Name:_____________________________
                                              Title:____________________________

----------
(1) Bracketed proviso applies only the Seller's form of certificate.
(2) Bracketed proviso applies only the Seller's form of certificate.

                                                                       Exhibit D

<PAGE>

                                    EXHIBIT E

                         FORM OF SECRETARY'S CERTIFICATE

      In accordance with [Section 3.3(e)] [Section 3.4(e)] of that certain
Purchase and Sale Agreement, dated as of_________________, 2005 (the "Purchase
Agreement"), by and among Nextel Spectrum Acquisition Corp., a Delaware
corporation ("Seller"), and Clearwire Spectrum Holdings LLC, a Nevada limited
liability company ("Buyer"), the undersigned, on behalf of [Seller] [Buyer],
does hereby certify to [Seller] [Buyer], as of the date hereof, that:

      1. Attached hereto as Annex-1 is a true and correct copy of the
[Certificate of Incorporation of Seller] [Certificate of Formation of Buyer] as
filed with the Secretary of State of [Delaware] [Nevada], which has not been
amended, modified, repealed or rescinded and is in full force and effect as of
the date hereof.

      2. Attached hereto as Annex-2 is a true and correct copy of the [Bylaws of
Seller, adopted by the Board of Directors of Seller] [Limited Liability Company
Agreement of Buyer, adopted by the Members of Buyer], which ha[s][ve] not been
amended, modified, repealed or rescinded and [is] [are] in full force and effect
as of the date hereof.

      3. [Attached hereto as Annex-3 is a true and correct copy of the [written
action] [resolutions] adopted by the board of directors of Clearwire
Corporation, as the sole member of Buyer, which has not been amended, modified,
repealed or rescinded and is in full force and effect as of the date hereof,
authorizing the execution of the Purchase Agreement and the consummation of the
transactions contemplated thereby.](3)

      4. The officers of [Seller] [Buyer] whose names and signatures appear on
the Incumbency Schedules attached to this Secretary's Certificate as Annex-4 are
duly elected or appointed, qualified, and acting officers of [Seller] [Buyer],
holding on the date hereof the offices set opposite their respective names, and
the signatures opposite their names are their own genuine signatures.

      IN WITNESS WHEREOF, [Seller] [Buyer] has executed and delivered this
Secretary's Certificate as of this______day of___________, 200______.

                                              [Seller][Buyer]

                                              By:_______________________________
                                              Name:_____________________________
                                              Title:____________________________

----------
(3) This transaction will not be approved by Seller's board as it is
    within the ordinary course of Seller's business operations.

                                                                       Exhibit F

<PAGE>

                                    EXHIBIT F

                          FORM OF CONSENT TO ASSIGNMENT

                        NEXTEL SPECTRUM ACQUISITION CORP.

                              [_____________, 200_]

[Lessor Name]
[Lessor Address]
___________________________
___________________________

      Re: [Lease], dated [__________________, ______], by and between [Lessor]
and [Lessee] (the "Lease")

Ladies and Gentlemen:

      Nextel Spectrum Acquisition Corp. ("Assignor") and Clearwire Spectrum
Holdings, LLC ("Assignee") are parties to that certain Purchase and Sale
Agreement, dated [__________________, 2005] (the "Purchase Agreement"), pursuant
to which, among other things, Assignor desires to assign, and Assignee desires
to assume, all of Assignor's right, title and interest in, to and under the
Lease (the "Assignment").

      Section [ ] of the Lease requires your consent to the Assignment.
Accordingly, we hereby request your consent to the Assignment pursuant to the
terms and conditions set forth in the Purchase Agreement. By signing below, you
hereby consent to the Assignment and release Assignor from performance of all
obligations of Assignor under the Lease.

      This Consent to Assignment is conditioned upon, and shall not be effective
until, the consummation of the Assignment in accordance with the terms of the
Purchase Agreement. This Consent does not constitute a consent to any subsequent
assignment.

      Your consideration of this matter is appreciated. Should you have any
questions or comments, please do not hesitate to call [contact] at [phone
number].

                                              Very truly yours,

                                              [Assignor Officer]

ACKNOWLEDGED and AGREED,
this____day of___________, 2005.
[Lessor]

By:_____________________________
Name:___________________________
Title:__________________________

                                                                       Exhibit F

<PAGE>

                                   EXHIBIT G

<PAGE>

                                                                  EXECUTION COPY

                                 FIRST AMENDMENT

      This First Amendment (this "First Amendment"), dated as of December 12,
2005, is entered into by and between Nextel Spectrum Acquisition Corp., a
Delaware corporation ("Seller") and Clearwire Spectrum Holdings LLC, a Nevada
limited liability company ("Buyer").

                                    RECITALS

      A. This First Amendment amends that certain Purchase and Sale Agreement
(the "Agreement"), dated as of October 24, 2005, by and among Seller and Buyer.
Capitalized terms used, but not defined, in this First Amendment have the
meanings ascribed to such terms in the Agreement.

      B. Pursuant to the rules of the Federal Communications Commission ("FCC"),
all site specific BRS licenses that have a [***] prefix (the [***] Licenses")
have been incorporated into their related basic trading area BRS licenses (the
"BTA Licenses"), and, as a result, all [***] Licenses have ceased to separately
exist. Therefore, all the frequencies formerly associated with the [***]
Licenses are now associated with their corresponding BTA Licenses reflected on
the revised schedule 1 to the Agreement attached hereto as Exhibit A.

      C. Seller and Buyer desire to amend the Agreement: pursuant to Section
10.3 of the Agreement in order to reflect that, pursuant to FCC Rules, the [***]
Licenses that are listed on Schedule 1 to the Agreement have been incorporated
into their related BTA Licenses.

                                    AGREEMENT

      NOW, THEREFORE, in consideration of the premises and the mutual agreements
hereinafter set forth, Seller and Buyer agree as follows:

                                    ARTICLE I
                                   AMENDMENTS

      Section 1.1 FCC Licenses Schedule. Schedule 1 of the Agreement is hereby
amended and restated in its entirety in the form attached hereto as Exhibit A.

      Section 1.2 Treatment of [***] Licenses. For all purposes under the
Agreement, all [***] Licenses will be deemed to be incorporated with and into
their related BTA Licenses as indicated by the amended and restated Schedule 1
of the Agreement, which is attached hereto as Exhibit A. In order to calculate
the value allocated to any BTA License (including, without limitation, such
calculations for purposes of determining the satisfaction of the Closing
Conditions set forth in Section 3.2(a) of the Agreement, any adjustments to the
Purchase Price pursuant to Section 3.2(b) of the Agreement, any allocation [***]
of the Purchase Price pursuant to Section 3.6 of the Agreement and the
calculation of the [***] Purchase Price pursuant to Section 6.5(c)), such value
shall include the value of the related [***] Licenses. By way of example and for
purposes of illustration only, the value allocated to the BTA License for
[***] shall equal [***] which is the aggregate of the original value of [***]
attributed to that BTA License and the original values for the related [***]
Licenses of

<PAGE>

[***] respectively.

                                   ARTICLE II
                                 MISCELLANEOUS

      Section 2.1 Acknowledgment. Buyer and Seller acknowledge and agree that
the merger of the KNS Licenses with and into the related BTA Licenses and the
resulting extinguishment of such KNS Licenses shall not constitute a breach of
any representation, warranty or covenant of Buyer or Seller under the Agreement,
including, without limitation, Sections 4.4,4.9,6.1,6.9,6.10,7.3 and 9.2(a) of
the Agreement.

      Section 2.2 Affirmation of Agreement. Except as expressly amended hereby,
all terms, conditions and provisions of the Agreement are hereby reaffirmed and
shall remain in full force and effect.

      Section 2.3 Governing Law. This First Amendment shall be governed by, and
construed in accordance with, the internal laws of the State of New York,
without reference to the choice of law principles thereof.

      Section 2.4 Headings. The headings contained in this First Amendment are
for reference purposes only and shall not affect in any way the meaning or
interpretation of this First Amendment.

      Section 2.5 Counterparts. This First Amendment may be executed in one or
more counterparts, each of which shall be deemed an original and all of which
shall together constitute one and the same agreement, and shall become effective
when one or more such counterparts have been signed by each of the parties and
delivered to the other party.

               [Remainder of Page Blank - Signature Page Follows]

                                       2
<PAGE>

      IN WITNESS WHEREOF, Seller and Buyer have duly executed this First
Amendment as of the date first written above

                                              NEXTEL  SPECTRUM ACQUISITION CORP.

                                              By: [***]
                                                  ------------------------------
                                              Name: [***]
                                              Title: VP

                                              CLEARWIRE  SPECTRUM HOLDINGS LLC

                                              By: /s/ Ben Wolff
                                                  ------------------------------
                                              Name: Ben Wolff
                                              Title: Executive Vice President

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