Document:

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                                                                   Exhibit 10.65

                                                                  EXECUTION COPY

                                BANDA ANCHA S.A.
                          SECURITIES PURCHASE AGREEMENT

     This Securities Purchase Agreement (this "Agreement") is made as of the 7th
day of December, 2005

     BY AND BETWEEN

     BASA Holding Iberia S.L.U., a company incorporated under the laws of Spain
("BHI");

     Clearwire Corporation, a corporation organized under the laws of the State
of Delaware ("Parent"); and

     Clearwire Europe S.a.r.l., a limited liability company organized under the
laws of Luxembourg and an indirect subsidiary of Parent ("Clearwire").

     BHI, Parent and Clearwire shall be jointly referred to as the "Parties" and
each of them, individually, as a "Party".

                                    RECITALS

     WHEREAS, as of the date of this Agreement, Banda Ancha S.A., a company
incorporated under the laws of Spain (the "Company"), has a share capital of
E4,563,862, divided in 4,563,862 shares, with a par value of E1.00 each, all of
the same class and series, totally subscribed and paid up and free from any
lien, pledge, usufruct, charge, security interest, right of first refusal,
option or right of others therein, or encumbrance of any nature whatsoever
("Liens") except as provided for in the corporate By-laws.

     WHEREAS, as of the date of this Agreement, BHI is the legal owner of 100%
of the share capital of the Company, and Redes y Servicios Liberalizados, S.A.
("RSL") is the sole shareholder of BHI.

     WHEREAS, concurrently with the execution of this Agreement, Clearwire, BHI
and the Company have entered into that certain Investment Agreement (the
"Investment Agreement"), pursuant to which Clearwire has subscribed for 51% of
the Company's share capital for a purchase price of E4,750,143.

     WHEREAS, a condition precedent to the closing of this Agreement is the
consummation of those transactions contemplated by that certain Asset Purchase
Agreement between ALO (as defined below) dated of even date herewith (the "ALO
Agreement").

     WHEREAS, subject to the satisfaction of the conditions set forth herein,
BHI desires to sell, and Clearwire desires to purchase, all of the Company's
share capital held by BHI as of the Closing (as defined below).

     NOW, THEREFORE, in consideration of the premises and the mutual
representations, warranties, covenants, conditions and agreements hereinafter
set forth, the Parties agree to enter into this Agreement pursuant to the
following:

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     Capitalized terms used but not otherwise defined within this Agreement
shall have the meanings set forth below.

     "Adjustment Date" means the earliest to occur after the Closing of (i) the
closing of an initial public offering of Parent or any entity in the chain of
ownership between the Company and Parent, or their successors (but specifically
excluding any subsidiary of Clearwire or Parent that is not in the direct
ownership chain between Parent and the Company) (a "Clearwire Entity"); (ii) the
closing of a transaction in which any Clearwire Entity's shares of common stock
are exchanged for securities that are listed on a recognized securities exchange
or on the NASDAQ National Market; (iii) the effective date of a Change of
Control of any Clearwire Entity after the Closing; or (iv) the 30-month
anniversary of the Closing.

     "Affiliate" means for any Person, a Person controlling, controlled by or
under common control with, such Person.

     "ALO" means Alo Communicaciones, S.L.U.

     "Applicable Percentage" means 49%.

     "Change of Control" means (i) a sale of all or substantially the assets of
the applicable entity or (ii) the transfer by the applicable entity's
stockholders by means of a merger, consolidation, reorganization,
recapitalization or otherwise, of more than 50% of the voting power of the
applicable entity.

     "Clearwire Investment" means the total amount of any investment by Parent,
Clearwire or any of their Affiliates in the Company as of the Adjustment Date,
including, without limitation, (i) any purchases of capital stock, (ii) any
contributions to capital of the Company for which no additional capital stock is
issued, and (iii) the amount of any indebtedness owed to Parent, Clearwire or
any of their Affiliates, whether or not convertible, provided that such debt was
incurred for legitimate business purposes of the Company.

     "Clearwire Gross Share" means the amount determined by multiplying (i) the
Company Net Value by (ii) the aggregate percentage of the Company's outstanding
stock owned, directly or indirectly, by Parent and its Affiliates (determined on
a fully-diluted basis after giving effect to (a) the exercise of any then
outstanding options or warrants and (b) the conversion of any then outstanding
securities convertible into shares of the Company's stock at a conversion price
that is less than the Fair Market Value of the Company, on a per share basis, on
the Adjustment Date, but not giving effect to any sale of any shares of capital
stock of the Company held by Clearwire to any third party, such shares to be
treated as still owned by Clearwire).

     "Clearwire Net Share" means the difference between the Clearwire Gross
Share and the sum of (i) the Purchase Price (without giving effect to any 3.5
Tax Adjustment or 38 Tax Adjustment or claims under the Indemnification
Agreement) and (ii) the Clearwire Investment.

     "Company Net Value" means the sum of the Fair Market Value of the Company
on the Adjustment Date less the amount of any outstanding indebtedness of the
Company on the Adjustment Date (other than (i) indebtedness owed to Parent or
any of Parent's Affiliates and (ii)

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indebtedness owed under any convertible securities which have a conversion price
that is less than the Fair Market Value of the Company, on a per share basis, on
the Adjustment Date).

     "Confidential Information" means any and all information regarding the
business, finances, operations, products, services and customers of the
disclosing Party and its Affiliates, in written or oral form or in any other
medium.

     "Damages" means any loss, liability, claim, obligation, damage, deficiency,
costs and expenses, fines or penalties, including reasonable judicial and
extra-judicial fees of lawyers and attorneys at court (procuradores) and any
other defense costs, costs of investigation, remediation or other response
actions.

     "Disqualified Transaction" means (a) a sale of Class A Common Stock
occurring upon exercise of any options or warrants (including without limitation
any employee stock options), (b) a sale of Class A Common Stock pursuant to an
agreement outstanding on the date of this Agreement, (c) a sale of Class A
Common Stock occurring in connection with an acquisition of another entity or
assets of such other entity, or (d) a sale of Class A Common Stock in connection
with an agreement for the performance of services to the Parent or any of its
Affiliates.

     "Fair Market Value" means, with respect to the Clearwire Stock or shares of
Class A Common Stock, (i) the per share price of Class A Common Stock in the
event triggering the Adjustment Date, if applicable, (ii) if subsection (i) is
inapplicable and Parent has sold shares of Class A Common Stock (other than in a
Disqualified Transaction) for cash to an unrelated third party within sixty days
prior to the determination of the Fair Market Value, the price at which the
shares of Class A Common Stock were sold in the last such transaction occurring
prior to the determination of the Fair Market Value, or (iii), or otherwise as
determined by Parent's board of directors in good faith. In no event shall the
Fair Market Value be less than $5.00 per share (as appropriately adjusted for
any Recapitalization Event) (the "Floor"); provided, however, if there is a
third party equity financing transaction (other than a Disqualified Transaction)
prior to the date of determination of Fair Market Value in which shares of
Parent's Class A Common Stock are sold for an aggregate cash consideration of
$25,000,000 or more at a per share price less than $5.00 per share (as
appropriately adjusted for any Recapitalization Event) ("New Shares"), then the
Floor shall be reduced to the price at which the New Shares are sold in such
transaction, but in no event less than $2.50 per share (as appropriately
adjusted for any Recapitalization Event). Notwithstanding the foregoing, no
adjustment to the Floor shall be made if such adjustment to the Floor would
trigger any adjustment under any anti-dilution rights in favor of any of
Parent's stockholders or other security holders then outstanding.

     "Fair Market Value of the Company" means the fair market value of the
Company on the Adjustment Date as determined by the Neutral Bank, which
determination shall be conclusive and binding on all parties. The Neutral Bank
shall be instructed (i) not to consider in the determination of the fair market
value any debt that is or will be subtracted from Fair Market Value in the
calculation of Company Net Value and (ii) to use similar principles in
determining the Fair Market Value of the Company as used in determining the
value of the Clearwire Entity that is a party to the transaction triggering the
Post-Closing Adjustment, if applicable.

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

     "Indemnification Agreement" means that certain Indemnification Agreement by
and among BHI, Clearwire and Parent dated of even date herewith.

     "knowledge" means, with respect to the knowledge of BHI, the actual
knowledge of the directors and officers of BHI and the Company, after due
inquiry into the subject matters covered by the representation and warranties
contained in Schedule A.

     "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.

     "Neutral Bank" means the internationally recognized investment banking firm
selected as follows: (a) Clearwire shall initially propose a slate of three
firms; and (b) from such slate BHI shall select the firm; provided, that, at the
time of selection such firm shall not be an Affiliate of, or have a shareholder
or banking relationship with, either Clearwire or BHI.

     "Person" means an individual, a partnership, a corporation, a limited
liability company, an association, a joint shares company, a trust, a joint
venture, an unincorporated organization, or a government agency or authority.

     "Recapitalization Event" means any stock split, stock dividend,
recapitalization or similar event.

     "RSL Group" means BHI, RSL or any of their respective Affiliates.

     "Shares" means all of the Company's share capital held by BHI as of the
Closing, which shall include, but not be limited to, any share capital held by
BHI as of the date of this Agreement, any additional share capital acquired by
BHI upon conversion of the intercompany obligations as contemplated under
Section 2.1(f) of this Agreement and any share capital issued to BHI or any
members of the RSL Group under the ALO Agreement.

     "Transactions" means the transactions contemplated by the Investment
Agreement, the ALO Agreement, this Agreement or any Ancillary Agreement.

     "USD" means United States Dollars.

                     ARTICLE 1. PURCHASE AND SALE OF SHARES

     SECTION 1.1 PURCHASE AND SALE OF SHARES. On the terms and subject to the
conditions of this Agreement, at the Closing, BHI shall sell, assign, transfer,
convey and deliver to Clearwire free and clear of all Liens, and Clearwire shall
purchase from BHI the Shares.

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     SECTION 1.2 PURCHASE PRICE. The purchase price (the "Purchase Price") for
the Shares shall be an amount equal to Twenty-Three Million Seven Hundred
Fifty-One Thousand Dollars ($23,751,000).

     SECTION 1.3 PAYMENT OF PURCHASE PRICE. The Purchase Price shall be payable
at the Closing in One Thousand U.S. Dollars ($1,000.00) and 4,750,000 shares
(the "Clearwire Stock") of Parent's Class A Common Stock ("Class A Common
Stock"), valued at $5.00 per share. At the Closing, Clearwire shall deliver One
Thousand Dollars ($1,000.00) in cash and multiple certificates, representing the
Clearwire Stock, duly executed by an authorized representative of Parent;
provided, however. Parent shall retain possession of the certificates
representing the Clearwire Stock subject to the Share Pledge Agreements in
accordance with the terms of the Share Pledge Agreements.

     SECTION 1.4 TAX ADJUSTMENT TO PURCHASE PRICE. The parties acknowledge that
the Company is currently appealing a spectrum tax in the Audiencia Nacional
concerning the 2001 spectrum tax for the Company's 3.5 GHz license (the "3.5 Tax
Appeal") and the 2001 and 2002 spectrum tax for the 38 GHz license (the "38 Tax
Appeal", and together with the 3.5 Tax Appeal, the "Tax Appeals"). Once any of
the Tax Appeals are finally determined, on the date that such Tax Appeal is
finally decided (each, a "Tax Adjustment Date"), the Purchase Price shall be
adjusted as set forth below.

          (a) If the Company's actual tax liability as finally determined by the
38 Tax Appeal ("Actual 38 Tax Liability") is less than E3,750,088.14 (such
difference, the "38 Tax Adjustment"), then Parent, on behalf of Clearwire, shall
issue to BHI additional shares of Class A Common Stock in an amount equal to the
quotient obtained by dividing (i) the lesser of (A) the 38 Tax Adjustment and
(B) E3,500,000 by (ii) the Fair Market Value of the Clearwire Stock on the Tax
Adjustment Date.

          (b) If the Company's actual tax liability as finally determined by the
3.5 Tax Appeal ("Actual 3.5 Tax Liability") is greater than E390,116.00 (such
difference, the "3.5 Tax Adjustment"), then BHI shall return to Clearwire shares
of its Clearwire Stock in an amount equal to the quotient obtained by dividing
(i) the lesser of (A) the 3.5 Tax Adjustment and (B) E3,500,000 by (ii) the Fair
Market Value of the Clearwire Stock on the Tax Adjustment Date.

          (c) Within five (5) business days after the determination of the Fair
Market Value of the Clearwire Stock, the Party required to issue or transfer
shares of Class A Common Stock, shall deliver to the other party an original
stock certificate representing such shares, and if applicable, a signed stock
power transferring such shares. All calculations under this Section 1.4 shall be
made in USD based on the currency exchange ratio in effect on the Tax Adjustment
Date.

     SECTION 1.5 POST-CLOSING ADJUSTMENT TO PURCHASE PRICE. On the Adjustment
Date, the Purchase Price shall be adjusted, upwards or downwards. The "Adjusted
Purchase Price" shall be an amount equal to the sum of (i) the product of (a)
the Clearwire Net Share multiplied by (b) the Applicable Percentage, minus (ii)
the positive difference, if any, between (a) the Fair Market Value of the
Clearwire Stock on the Adjustment Date and (b) the Purchase Price. If the
Adjusted Purchase Price is greater than the Purchase Price (such difference, the
"Positive

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Adjustment"), then Parent shall issue to BHI additional shares of Class A Common
Stock in an amount equal to the quotient of the Positive Adjustment and the Fair
Market Value of the Clearwire Stock on the Adjustment Date. If the Adjusted
Purchase Price is less than the Purchase Price (such difference, the "Negative
Adjustment"), then BHI shall return to Clearwire shares of its Clearwire Stock
in an amount equal to the quotient of the Negative Adjustment and the Fair
Market Value of the Clearwire Stock on the Adjustment Date. In no event shall
the Positive Adjustment exceed E20,000,000 and in no event shall the Negative
Adjustment exceed E10,000,000. Within five (5) business days after the
determination of the Fair Market Value of the Clearwire Stock, the Party
required to issue or transfer shares of Class A Common Stock shall deliver to
the other party an original stock certificates representing such shares, and if
applicable, a signed stock power transferring such shares. All calculations
under this Section 1.5 shall be made in USD based on the currency exchange rate
in effect on the Adjustment Date. Notwithstanding anything to the contrary
herein, if the aggregate amount of the Clearwire Investment is less than E40
million as of the Adjustment Date, then BHI shall not be required to pay the
Negative Adjustment, if any.

     SECTION 1.6 CLOSING. The closing of the purchase and sale of the Shares
shall take place at the offices of the Company in Madrid, at 10:00 a.m. (Spanish
time), no later than three (3) business days after the satisfaction or waiver of
all of the Closing conditions set forth in Article 2, or at such other time and
place as the Parties shall agree, either orally or in writing, (the time and
place designated as the "Closing"). In no event shall the Closing occur later
than nine (9) months after the date of this Agreement, at which time the
Agreement shall terminate if not closed prior to such time; provided, however,
either Party can terminate this Agreement sooner if the other Party materially
breaches this Agreement and such breach is not cured within thirty (30) days
after receipt of written notice of such breach from the non-breaching Party. The
Notary Public (the "Notary") for the Closing shall be selected by Clearwire, and
Clearwire and BHI shall each pay one-half (1/2) of the expenses of the Notary.

                   ARTICLE 2. CLOSING CONDITIONS AND DOCUMENTS

     SECTION 2.1 CONDITIONS TO PARENT'S AND CLEARWIRE'S OBLIGATIONS. The
obligations of Parent and Clearwire to consummate the Transactions are subject
to the satisfaction or waiver on or before the Closing of each of the following
conditions:

          (a) NO BREACH. There shall not have occurred any breach by BHI of any
representations or warranties made in this Agreement (including without
limitation Schedule A hereto), the Investment Agreement or the Purchase
Agreement arising from or related to facts, actions, inaction, circumstances or
occurrences arising or occurring prior to the date of this Agreement.

          (b) PERFORMANCE. BHI shall have performed and complied with all
agreements, obligations, and conditions contained in this Agreement, the
Investment Agreement, the Indemnification Agreement, the Shareholders Agreement
(as defined in the Investment Agreement), the Credit Agreement (as defined in
the Investment Agreement) or the Pledge Agreement (as defined in the Investment
Agreement) that are required to be performed or complied with by it on or before
the Closing.

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          (c) QUALIFICATIONS. All authorizations, approvals, or permits, if any,
of any Governmental Authority that are required by BHI in connection with the
lawful purchase and sale at the Closing pursuant to this Agreement shall be duly
obtained and effective as of the Closing.

          (d) PROCEEDINGS AND DOCUMENTS. All corporate and other proceedings
required by Spanish Law to BHI to complete the transactions contemplated at the
Closing, including, without limitation, the approval of BHI's shareholder, shall
have occurred and all documents incident thereto shall be reasonably
satisfactory in form and substance to Clearwire's counsel. The share capital
increase agreed by a Shareholders' Meeting held on August 5, 2005 shall have
been registered at the Mercantile Registry and evidence thereof shall have been
provided to Parent and Clearwire.

          (e) NO INJUNCTIONS OR LITIGATION. No preliminary or permanent
injunction or other order of any Governmental Authority of competent
jurisdiction restraining or prohibiting the consummation of the Transactions
shall be in effect. No claim or other proceeding shall be pending, or, to the
knowledge of BHI, threatened, seeking to restrain, enjoin or prohibit or declare
illegal, or seeking substantial damages in connection with, any material part of
the Transactions.

          (f) ELIMINATION OF INTERCOMPANY DEBT. Parent and Clearwire shall have
received evidence, reasonably satisfactory to each, that all of the intercompany
obligations between the Company, on one hand, and BHI, RSL or any of their
respective Affiliates, on the other hand, including, without limitation, the
obligations arising before June 1, 2005 (but excluding any costs and expenses
incurred as a consequence of the Madrid launching, as well as any intercompany
obligations arising between the signature hereof and the closing which have not
been paid as of immediately prior to Closing pursuant to Section 3.3(b) of the
Investment Agreement) shall have been reduced to the amount of 1,372,549 Euros
(the "Permitted Intercompany Debt"). The Parties agree that the reduction of all
of the intercompany obligations other than the Permitted Intercompany Debt shall
be accomplished by a conversion into share capital of the Company, which
conversion shall take place immediately prior to Closing, and not before, except
as expressly contemplated under the Investment Agreement or as previously
approved in writing by Clearwire.

          (g) ALO TRANSFER. The transactions contemplated by the ALO Agreement,
including the increase in share capital as payment of the purchase price
thereunder, shall have been consummated immediately prior to Closing, and not
before, except as previously approved by Clearwire in writing; provided,
however, this condition shall be deemed waived if Clearwire causes the Company
to breach its obligations to close the ALO Agreement pursuant to the terms
thereof.

          (h) TRADEMARK TRANSFER. The documents necessary to transfer all right,
title and interest in and to the trademark no. 1.741.388 "Banda Ancha Basa" from
RSL to the Company shall have been filed for registration with the Spanish
Office of Patents and Trademarks ("Oficina Espanola de Patentes y Marcas").

          (i) CLOSING DELIVERIES. BHI shall have delivered the following to
Clearwire:

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               (i) a fully executed notarial deed of transfer of the Shares, in
form reasonably acceptable to Clearwire, notarized by the Notary and granted in
a Public Deed;

               (ii) a certificate executed by the chief executive officer of BHI
that the conditions in Section 2.1(a) and (b) have been satisfied;

               (iii) opinion of Baker & McKenzie, counsel for the Company, dated
the date of Closing in the form attached hereto as Exhibit A;

               (iv) executed consents of any third parties required by the terms
of the agreements or relationships between the Company, BHI, RSL or any of its
Affiliates and such third parties, including without limitation the consent the
First Instance Court in charge of RSL suspension of payments or the declaration
from the Supervisory Commission that the transactions contemplated by this
Agreement will not breach the RSL Creditor's Agreement dated July 1, 2002;
provided, however, if the suspension of payments is lifted and the Supervisory
Commission will not agree to make a decision on the foregoing issues, BHI may
deliver a clean opinion of Baker & McKenzie, counsel for the Company, in form
and substance satisfactory to BHI, stating that (A) the declaration of the
aforementioned Supervisory Commission is not required, (B) the transactions
contemplated by this Agreement will not breach the aforementioned Creditor's
Agreement, and (C) none of the creditors would have the right to unwind the
transactions contemplated by this Agreement;

               (v) the share pledge agreements between BHI and Clearwire in the
forms attached hereto as Exhibits B and C, pursuant to this Agreement, the
Credit Agreement (as defined in the Investment Agreement), and the
Indemnification Agreement, duly executed by an authorized representative of BHI,
notarized by the Notary and placed in the Public Record (the "Share Pledge
Agreements");

               (vi) a stock power with respect to the Clearwire Stock retained
by Parent pursuant to Section 1.3, duly executed by an authorized representative
of BHI;

               (vii) a side letter agreement regarding the Parent Stockholders
Agreement between BHI and Parent in the form attached hereto as Exhibit D, duly
executed by an authorized representative of BHI (the "Shareholder Side Letter");

               (viii) a joinder to Amended and Restated Stockholders Agreement,
dated March 16, 2004 by and among Parent and Parent's stockholders, and a
joinder to the Registration Rights Agreement by and among Parent and certain of
Parent's stockholders, attached hereto as Exhibit E and Exhibit F. respectively.

     SECTION 2.2 CONDITIONS TO BHI'S OBLIGATIONS. The obligations of BHI to
consummate the Transactions are subject to the satisfaction or waiver on or
before the Closing of each of the following conditions:

          (a) REPRESENTATIONS AND WARRANTIES. The representations and warranties
of Parent and Clearwire contained in Schedule B shall be true in all material
respects on and as of the Closing with the same effect as though such
representations and warranties had been made on and as of the date of the
Closing. For purposes of this Section 2.2(a) only, all such

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representations and warranties shall be read without regard to materiality or
material adverse effect qualifiers contained therein.

          (b) PERFORMANCE. Parent and Clearwire shall have performed and
complied with all agreements, obligations, and conditions contained in this
Agreement that are required to be performed or complied with by it on or before
the Closing.

          (c) QUALIFICATIONS. All authorizations, approvals, or permits, if any,
of any Governmental Authority that are required by Parent or Clearwire in
connection with the lawful purchase and sale Shares at Closing pursuant to this
Agreement shall be duly obtained and effective as of the Closing.

          (d) CLOSING DELIVERIES. Clearwire shall have delivered the following
to BHI:

               (i) Payment of the Purchase Price in accordance with Section 1.3;

               (ii) a certificate executed by the manager of Clearwire that the
conditions in Section 2.2(a) and Section 2.2(b) have been satisfied;

               (iii) the Share Pledge Agreements, duly executed by an authorized
representative of Clearwire, notarized by the Notary and placed in the Public
Record; and

               (iv) the Shareholder Side Letter, duly executed by an authorized
representative of Parent.

                   ARTICLE 3. REPRESENTATIONS AND WARRANTIES.

     SECTION 3.1 REPRESENTATIONS AND WARRANTIES OF BHI. BHI specifically
declares to Clearwire and Parent that the representations and warranties of BHI
contained in Schedule A to this Agreement ("Representations and Warranties"')
are true, accurate and complete. With respect to the assets acquired prior to
Closing pursuant to the ALO Agreement, the representations and warranties
applicable to such assets are exclusively those established in the ALO Agreement
and not the representations and warranties of this Agreement, and shall be made
as of the Closing Date and not as of the date of this Agreement. Each of the
Representations and Warranties set out in the several paragraphs of Schedule A
is separate and independent and, except as expressly provided to the contrary in
this Agreement, is not limited by reference to any other paragraph of that
Schedule or by anything in this Agreement. BHI acknowledges that these
Representations and Warranties are essential elements for Clearwire and Parent
to enter into this Agreement.

     SECTION 3.2 REPRESENTATIONS AND WARRANTIES OF CLEARWIRE AND PARENT.
Clearwire and Parent each declare to BHI that the representations and warranties
contained in Schedule B to this Agreement are true, accurate and complete. Each
of the representations and warranties set out in the several paragraphs of
Schedule B is separate and independent and, except as expressly provided to the
contrary in this Agreement, is not limited by reference to any other paragraph
of that Schedule or by anything in this Agreement. Each of Parent and Clearwire
acknowledges that these representations and warranties are essential elements
for BHI to enter into this Agreement.

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                              ARTICLE 4. COVENANTS

     SECTION 4.1 CONSUMMATION OF TRANSACTIONS. From and after the date of this
Agreement, 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,
proper or advisable and consistent with applicable Law to perform its
obligations under this Agreement and to consummate the Transactions as soon as
reasonably practicable.

     SECTION 4.2 CERTAIN NOTICES. From the date of this Agreement until Closing,
each Party shall promptly notify the other Party in reasonable detail:

          (a) 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 the notifying Party or its properties or
assets, which could materially adversely affect the Transactions or its ability
to perform its obligations hereunder;

          (b) 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 covenants or
agreements contained in this Agreement, and shall use commercially reasonable
efforts to prevent or promptly remedy such breach; and

          (c) 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 the
Company.

     SECTION 4.3 CONFIDENTIALITY. Pursuant to this Agreement and the performance
thereof, each Party may receive certain Confidential Information. No Party shall
use for itself, except in performance of the Agreement, or disclose to any
Person this Agreement or any Confidential Information, except (a) information
that was gained independent of such Party's relationship with the other Party
and became publicly available through no breach of any obligation of
confidentiality by such Party; (b) information that is communicated to a third
party with the prior written consent of such Party; or (c) information that is
required to be disclosed pursuant to the lawful order of a government agency or
disclosure that is required by operation of law, but in such event, only to the
extent such disclosure is required and, to the extent reasonably practicable,
prior written notice must be given to allow the disclosing Party to seek a
protective order or other appropriate remedy. In the event of a beach or
threatened breach of the terms of this section, the disclosing Party shall be
entitled to seek an injunction prohibiting any such breach. Any such injunctive
relief shall be in addition to, and not in lieu of, any appropriate relief in
the way of money damages or any other remedies available at law or in equity.
BHI acknowledges and agrees that the terms of this Agreement may be required to
be separately stated in the consolidated financial statements of Clearwire,
Parent and/or their respective Affiliates and that the disclosure by Clearwire,
Parent or their respective Affiliates of such financial statements shall not be
a breach of this Agreement. Notwithstanding the foregoing, either party may
disclose this Agreement to its affiliates, strategic partners, actual or
potential investors, lenders, acquirers, merger partners; and others whom such
party deems in good faith to

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have a need to know such information for purposes of pursuing a transaction or
business relationship with such party; provided, that, such party has an
enforceable non-disclosure or confidentiality agreement in place with such
Person that will provide at least the same amount of protection as this Section
4.3. Except for information that is required to be disclosed pursuant to the
lawful order of a government agency or disclosure that is required by operation
of law, in which event, only to the extent such disclosure is required and, to
the extent reasonably practicable, prior written notice must be given to allow
the disclosing Party to seek a protective order or other appropriate remedy, the
Parties specifically agree that any disclosure memoranda or due diligence
information provided by Clearwire or its Affiliates to BHI or its Affiliates, in
no event shall be disclosed to any third party, including, without limitation,
to any auditors' committee, court or administrative authority as an exhibit to
any documents without the express written approval of Clearwire; provided,
however. Parent and Clearwire shall reasonably collaborate with BHI to provide
information regarding Parent, Clearwire and its Affiliates in order to satisfy
the condition set forth in Section 2.1(i)(iv) with respect to the First Instance
Court or the Supervisory Commission provided that nothing obligates Parent or
Clearwire to publicly disclose any Confidential Information or any disclosure
memoranda.

     SECTION 4.4 FURTHER ASSURANCES. Each Party shall forthwith 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, including, without limitation, voting its shares of the Company's
common stock, waiving any applicable statutory rights or rights contained in the
Company's Bylaws and participating in any shareholders meetings required to
effectuate the transactions contemplated herein.

     SECTION 4.5 CONSENTS. The Parties shall use commercially reasonable efforts
and shall cooperate to prepare and file with Governmental Authorities and other
Persons (including, without limitation, application for consent or approval from
the First Instance Court or the Supervisory Commission as required by Section 2.
l(i)(iv)), no later than ten (10) days following the execution of this Agreement
(or as soon as possible with respect to the First Instance Court or the
Supervisory Commission) all applications, notices, petitions and other
documentation necessary or advisable to obtain such consents (it being
understood that the failure to file within such period shall not constitute a
breach of this Agreement). 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 Ministry rules. BHI will timely inform Clearwire of
the process and status of obtaining such consents.

     SECTION 4.6 BHI AND CLEARWIRE'S NEGATIVE COVENANTS. From the date of this
Agreement to the Closing Date, except as consented to in writing by the other
Party (which consent shall not be unreasonably withheld) or as otherwise
contemplated by this Agreement, BHI and Clearwire shall not:

          (a) take any action or omit to take any action that could reasonably
be expected to render inaccurate any representation or warranty made by such
Party contained in this Agreement (as if such representation or warranty was
made on each date from the date hereof to the Closing Date);

                                       11

<PAGE>

          (b) enter into any contracts or commitments that could have a material
effect on the Company or the Transactions;

          (c) commence any proceeding to merge, consolidate or liquidate or
dissolve, or obligate itself to do so; or

          (d) enter into any agreement, arrangement or understanding to, or
otherwise offer or commit to (i) sell, transfer, assign or dispose of the Shares
or any interest therein or portion thereof, or negotiate therefor, or (ii)
create, incur or suffer to exist any Lien on the Shares or any interest therein.

     SECTION 4.7 ACCESS. Between the date of this Agreement and the Closing
Date, BHI shall, during normal business hours (a) give Clearwire and their
respective representatives and advisors access to all books, records, offices
and other facilities and properties of the Company it has in its possession or
control; (b) permit Clearwire and their respective representatives and advisors
to make such inspections thereof as Clearwire may reasonably request; and (c)
furnish Clearwire with such financial and operating data and other information
with respect to the Company it has in its possession or control as Clearwire may
from time to time reasonably request.

     SECTION 4.8 NONCOMPETITION; NONSOLICITATION.

          (a) From the Closing Date and until one year after BHI, or its
Affiliates, cease to be a stockholder of Parent, BHI, on behalf of itself and
its Affiliates, covenants that neither BHI nor any of its Affiliates shall
engage in, or retain, participate in or have any interest, directly or
indirectly, in any Person (whether as an investor, agent, employee, creditor or
in any other capacity which calls for the rendering of services, advice, acts of
management, operation or control) that engages in any broadband wireless access
activities in Spain, excluding (i) the resale of the Company's products and
services pursuant to agreements between BHI, or its Affiliates, and the Company
approved by Clearwire in its sole discretion, or (ii) the continuation by BHI,
RSL and ALO of its non-wireless/fixed telecommunication services business
activities existing as of the date of this Agreement.

          (b) From the Closing Date and until one year after BHI, or its
Affiliates, cease to be a stockholder of Parent, BHI, on behalf of itself and
its Affiliates, covenants that neither BHI nor any of its Affiliates shall,
directly or indirectly, (i) employ or engage, recruit or solicit for employment
any person who is or becomes employed by the Company, or otherwise seek to
influence or alter any such person's relationship with the Company, or (ii)
solicit or encourage any present or future subscriber or customer of the Company
to terminate or otherwise alter his, her or its relationship with the Company
(other than general solicitation by BHI, RSL and ALO of its activities permitted
pursuant to Section 4.8(a)(ii)).

          (c) The Parties agree that the covenants contained in this Section
4.8, both as to time and area covered, are necessary to protect the Company and
Clearwire's investment in the Company and are deemed by the parties to be an
integral and important part of this Agreement. The Parties acknowledge and agree
that in the event of a breach of such covenants, Clearwire would not have an
adequate remedy at law, and Clearwire shall be entitled to

                                       12

<PAGE>

injunctive relief in addition to any other remedies which may be available to it
under this Agreement, at law or in equity. If any court of competent
jurisdiction shall at any time deem any of the covenants in this Section 4.8 too
lengthy or the area covered too extensive, the other provisions of this Section
4.8 shall nevertheless stand, the term shall be deemed to be the longest period
permissible by law under the circumstances and the area covered shall be deemed
to comprise the largest territory permissible by law under the circumstances.
The court in each case shall reduce the time period and/or area covered to
permissible duration or size.

     SECTION 4.9 PUBLICITY. Neither Party, nor any of their respective
Affiliates, shall issue any press release or public announcement concerning this
Agreement or the Transactions without obtaining the prior written approval of
the other Party, which approval will not be unreasonably withheld or delayed,
unless disclosure is otherwise required by applicable Law, provided that, to the
extent required by applicable Law, the disclosing Party shall use its
commercially reasonable efforts consistent with such applicable Law to consult
with the other Party with respect to the text thereof. The Parties shall
mutually agree on any initial public announcement, if any, of the Transactions.
Notwithstanding the foregoing, after Closing, neither Parent, Clearwire nor any
of their Affiliates shall be required to obtain the consent of BHI for any press
release or public announcement concerning this Agreement or the Transactions.

     SECTION 4.10 VAT TRANSACTIONS.

          (a) The Permitted Intercompany Debt shall become due and payable by
the Company to BHI upon refund or credit to the Company of the following value
added tax ("VAT") billed to the Company as a consequence of the following (the
"VAT Transactions"):

               (i)  E416,726 equal to the net VAT billed to the Company as a
                    consequence of intercompany invoicing related to the
                    transactions described in Schedule C;

               (ii) E936,000 equal to VAT billed or to be billed to the Company
                    as a consequence of the acquisition of certain assets of ALO
                    pursuant to the ALO Agreement; and

               (iii) E19,823 equal to the VAT billed or to be billed to the
                    Company as a consequence of the acquisition of certain
                    assets of BHI.

          BHI shall be solely responsible for filing its own tax returns with
the tax authorities, which shall include the VAT arising in the VAT
Transactions.

          (b) The Company shall pay the Permitted Intercompany Debt to BHI in
one or more installments within a maximum term of ten (10) business days
following the date which the Company receives payment or credit from the
relevant Governmental Authority of any VAT borne by the Company in the VAT
Transactions.

          (c) The Company undertakes to claim the refund of the VAT credit (once
the output VAT has been offset to the input VAT borne) regarding the VAT
Transactions in the

                                       13

<PAGE>

2005 4th quarter VAT return to be filed by the Company with the tax authorities
in January 2006, at the latest.

          (d) The Company's obligation to pay the Permitted Intercompany Debt is
only dependent upon the refund, reimbursement or credit of the VAT resulting
from the VAT Transactions and not VAT received or credited from any other
transactions.

          (e) The Permitted Intercompany Debt will be reduced and the Company
will not be obliged to pay to BHI any amounts of VAT borne on the VAT
Transactions in which:

               (i) a firm administrative or court resolution is issued denying
the Company's right to deduct all or part of the VAT of the VAT Transactions; or

               (ii) BHI expressly accepts that all or part of the VAT of the VAT
Transactions is not deductible or decides not to continue with any proceedings
contesting any court or administrative decision dealing with all or part of the
VAT borne on VAT Transactions.

          (f) In the event that all or part of the VAT refund in connection with
the VAT Transactions has not been made as of August 31, 2006, the Company shall
give notice to BHI, and, upon the request and at the expense of BHI, the Company
shall take commercially reasonable efforts to obtain the refund by way of
submitting any writ before the tax authorities and enclosing any document that
BHI may reasonably require in order to accelerate the refund.

          (g) The Company shall give immediate notice to BHI of the refusal from
the tax authorities to refund all or part of the VAT borne corresponding to the
VAT Transactions in order to allow BHI to assume the defence of the proceeding
at BHI's sole cost and expenses. For such purposes, the Company, at the expense
of BHI, will provide BHI with any information that BHI may reasonably require,
as well as reasonable access to all files and records of the Company relating or
containing information concerning the VAT claim.

          (h) In case a procedure is initiated to contest the tax authorities
decision denying the refund of the VAT borne on VAT Transactions and a final
resolution is issued by other administrative or court instances in favor of such
refund, BHI shall be entitled to any interest paid by the tax authorities that
accrued on the refunded VAT borne on VAT Transactions.

          (i) In the event the Company does not comply with its obligations
under Sections 4.10(b), (c), (f) and (g), that portion of the Permitted
Intercompany Debt for which the Company has breached its obligations shall be
immediately due and payable, unless BHI has expressly consented to such actions
by the Company.

          (j) For as long as the Permitted Intercompany Debt has not been repaid
funds withdrawn by BHI under the Credit Facility Agreement up to an amount of
such Permitted Intercompany Debt will not accrue any interest under such Credit
Facility Agreement until the earlier of the following circumstances occurs:

               (i) The Company pays BHI the Permitted Intercompany Debt; or

                                       14

<PAGE>

               (ii) There is a final administrative or judicial decision
resolving to deny the refund of the VAT borne on VAT Transactions.

     SECTION 4.11 BOARD REPRESENTATION. Until the Adjustment Date, Clearwire
agrees that it shall cause Alejandro-Rivas Micoud (either directly or indirectly
through BHI) to be appointed to the Company's board of directors and that it
shall not remove such individual unless he is removed for cause pursuant to
applicable Law.

                               ARTICLE 5. REMEDIES

     SECTION 5.1 INDEMNIFICATION BY BHI. The indemnification obligations of BHI
are as set forth in the Indemnification Agreement.

     SECTION 5.2 INDEMNIFICATION BY CLEARWIRE AND PARENT.

          (a) Clearwire and Parent shall be liable towards BHI and shall be
bound to indemnify BHI in full against and hold it harmless (subject to the
subsections (b) and (c) below) from any Damages of or to BHI arising out of or
resulting from any misrepresentations, inaccuracy or omission contained in the
representations and warranties of Clearwire contained in Schedule B.

          (b) Each of Clearwire and Parent's liability for all claims pursuant
to this Section 5.2 shall be extinguished by the lapse of two (2) years from the
Closing, unless notice is sent by BHI to Clearwire and Parent informing
Clearwire and Parent of the existence, nature and full details of a liability
including estimated amount, arising from any breach of any of Clearwire's
representations and warranties set forth on Schedule B within the relevant
period.

          (c) Notwithstanding anything herein to the contrary, neither Clearwire
nor Parent shall be liable for any Damages pursuant to this Section 5.2 except
and to the extent the aggregate total amount to be claimed exceeds the sum of
E250,000 (the "Deductible"). No single item of Damages may be used in
calculation of the Deductible unless and until such item of Damages exceeds the
sum of E25,000; provided, however, if the Deductible is met, Clearwire and
Parent shall be liable for all Damages regardless if they exceed E25,000.

                            ARTICLE 6. MISCELLANEOUS

     SECTION 6.1 ENTIRE AGREEMENT. This Agreement and the documents and other
agreements referred to herein constitute the entire agreement among the parties
and no party shall be liable or bound to any other party in any manner by any
warranties, representations, or covenants except as specifically set forth
herein or therein.

     SECTION 6.2 SURVIVAL OF WARRANTIES. The warranties, representations, and
covenants of BHI, Clearwire and Parent contained in or made pursuant to this
Agreement shall survive the execution and delivery of this Agreement and the
closing of the transactions contemplated hereby or termination of this
Agreement.

     SECTION 6.3 SUCCESSORS AND ASSIGNS. Except as otherwise provided herein,
the terms and conditions of this Agreement shall inure to the benefit of and be
binding upon the respective

                                       15

<PAGE>

successors and assigns of the parties. Nothing in this Agreement, express or
implied, is intended to confer upon any party other than the parties hereto or
their respective successors and assigns any rights, remedies, obligations, or
liabilities under or by reason of this Agreement, except as expressly provided
in this Agreement.

     SECTION 6.4 GOVERNING LAW. This Agreement shall be governed by, and
construed in accordance with, the internal laws of the Kingdom of Spain, without
reference to the choice of law principles thereof.

     SECTION 6.5 ARBITRATION. All disputes arising out of or in connection with
the present contract shall be submitted to binding arbitration pursuant to the
provisions of this Section and under the Rules of Conciliation and Arbitration
of the International Chamber of Commerce (the "ICC"). The arbitration shall be
conducted in London, or another neutral location mutually agreeable to Clearwire
and BHI. The arbitration shall be conducted in English. The arbitration shall be
conducted before a panel of three arbitrators, comprised of one arbitrator
appointed by each party to the dispute and one neutral arbitrator appointed in
accordance with the Rules of Conciliation and Arbitration of the ICC.

     SECTION 6.6 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. All filing fees required to be paid to any governmental authority
will be borne by the respective Party making the filing. The Parties shall each
bear one-half of the fees of the Notary required for the closing of the
transactions contemplated by this Agreement; provided, however, Clearwire agrees
to pay all of such fees with respect to the notarization of the Indemnification
Agreement.

     SECTION 6.7 TITLES AND SUBTITLES. The titles and subtitles used in this
Agreement are used for convenience only and are not to be considered in
construing or interpreting this Agreement.

     SECTION 6.8 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), or (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):

                                       16

<PAGE>

          If to BHI:

          Basa Holding Iberica, S.L.U
          Doctor Zamenhof, 22
          28027 Madrid
          Attention: Managing Director
          Facsimile: 91 230 14 07

          With a copy to:

          Baker & McKenzie
          Paseo de la Castellana 92
          28046 Madrid
          Attention: Maite Diez
          Facsimile: 91 391 51 49

          If to Parent or Clearwire:
          Clearwire Corporation, or, as applicable,
          Clearwire Europe S.a.r.I.
          5808 Lake Washington Blvd. Suite 300
          Kirkland, WA 98033
          Attention: Vice President, Legal Affairs
          Facsimile: (425) 216-7900

          With a copy to:

          Davis Wright Tremaine LLP
          2600 Century Square
          1501 Fourth Avenue
          Seattle, WA 98101
          Attention: Julie Weston
          Facsimile: 206-628-7699

     SECTION 6.9 FINDER'S FEES. Each party represents that it neither is nor
will be obligated for any finder's fee or commission in connection with this
transaction and agrees that it shall indemnify and hold harmless the other party
from any liability for any commission or compensation in the nature of a
finder's fee (and the cost and expenses of defending against such liability or
asserted liability) for which such party or any of its officers, partners,
employees, or representatives is responsible.

     SECTION 6.10 ATTORNEYS' FEES. If any action at law or in equity is
necessary to enforce or ] interpret the terms of this Agreement or any Ancillary
Agreement (as defined in Schedule A), the prevailing party shall be entitled to
reasonable attorneys' fees, costs, and disbursements in addition to any other
relief to which such party may be entitled.

                                       17

<PAGE>

     SECTION 6.11 AMENDMENTS AND WAIVERS. Any term of this Agreement may be
amended and the observance of any term of this Agreement may be waived (either
generally or in a particular instance and either retroactively or
prospectively), only with the written consent of the Parties.

     SECTION 6.12 SEVERABILITY. If one or more provisions of this Agreement are
held to be unenforceable under applicable law, such provision shall be excluded
from this Agreement and the balance of the Agreement shall be interpreted as if
such provision was so excluded and shall be enforceable in accordance with its
terms.

     SECTION 6.13 COUNTERPARTS. This Agreement may be executed in two or more
counterparts, each of which shall be deemed an original, but all of which
together shall constitute one and the same instrument.

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

                                        CLEARWIRE:

                                        CLEARWIRE EUROPE S.A.R.L.

                                        By: /s/ Nicolas Kauser
                                            ------------------------------------
                                        Name/Title: Title: Nicolas Kauser,
                                                           Manager

                                        BHI:

                                        BASA HOLDINGS IBERIA, S.L.U.

                                        By: /s/ Alejandro Rivas-Micoud
                                            ------------------------------------
                                        Name: Alejandro Rivas-Micoud
                                        Title: Managing Director & Special POA

                                        PARENT:

                                        CLEARWIRE CORPORATION

                                        By: /s/ Perry Satterlee
                                            ------------------------------------
                                        Name/Title: Perry Satterlee,
                                                    Co-President

                                       18

<PAGE>

                                                                  EXECUTION COPY

                                   SCHEDULE A

                     REPRESENTATIONS AND WARRANTIES OF BHI

     Except as set forth on the corresponding sections in the Disclosure
Schedule, BHI represents and warrants as follows:

     SECTION 1. ORGANIZATION; GOOD STANDING; QUALIFICATION. BHI and the Company
are companies duly organized, validly existing, and in good standing under the
laws of the Spain, have all requisite corporate power and authority to own and
operate their respective properties and assets and to carry on their respective
businesses, as now conducted and as presently proposed to be conducted. BHI has
all requisite corporate power and authority to execute and deliver this
Agreement, the Investment Agreement, the Indemnification Agreement, the Credit
Agreement, the Share Pledge Agreements, and any other agreement to which BHI or
the Company is a party the execution and delivery of which is contemplated
hereby (the "Ancillary Agreements"), and to carry out the provisions of this
Agreement and any Ancillary Agreement. The existing Corporate By-laws of the
Company are those registered at the Mercantile Registry at the date hereof and
no modifications or amendments have been passed by the General Shareholders
Meeting with regard to said Corporate By-laws which are pending execution or
registration at the Mercantile Registry.

     SECTION 2. AUTHORIZATION. All corporate action on the part of BHI, its
respective officers, directors and stockholders necessary for the authorization,
execution and delivery of this Agreement and any Ancillary Agreement, the
performance of all obligations of BHI hereunder and thereunder at the Closing
and the sale of the Shares as set forth in this Agreement when executed and
delivered, will constitute valid and legally binding obligations of BHI,
enforceable in accordance with their respective terms except (i) as limited by
applicable bankruptcy, insolvency, reorganization, moratorium, and other laws of
general application affecting enforcement of creditors' rights generally
vis-a-vis the Company and not BHI, RSL or any of its Affiliates, and (ii) as
limited by laws relating to the availability of specific performance, injunctive
relief, or other equitable remedies.

     SECTION 3. TITLE TO SHARES. The Shares that are being purchased by
Clearwire hereunder were duly and validly issued, fully paid, and are
nonassessable and together with the shares owned by Clearwire as a consequence
of the Investment Agreement represent 100% of the Company's capital. BHI is the
record and beneficial owner of the Shares, free and clear of any and all Liens.
BHI has the authority and capacity to sell, transfer, assign and deliver such
Shares as provided in this Agreement, and such delivery will convey to Clearwire
good and marketable title to such Shares, free and clear of any and all Liens,
charges, demands or adverse claims or other restrictions on the exercise of any
of the attributes of ownership other than the restrictions under applicable
securities laws.

     SECTION 4. GOVERNMENTAL CONSENTS. No consent, approval, qualification,
order or authorization of, or filing with, any Governmental Authority is
required on the part of the any of BHI in connection with its valid execution,
delivery, or performance of this Agreement.

<PAGE>

     SECTION 5. CAPITALIZATION AND VOTING RIGHTS.

          (a) SHARE CAPITAL. Immediately prior to the capital increase agreed
upon in the Investment Agreement, the issued capital of the Company consists of
4.563.862 shares of the same class and series, par value 1 Euro, all of which
are issued and outstanding and owned by BHI. The outstanding shares have been
duly authorized and validly issued, are fully paid and nonassessable, were
issued in accordance with the provisions of the Joint Stock Companies Act and
the share capital has been registered at the Mercantile Registry.

          (b) OTHER RIGHTS. Except for any rights under the Joint Stock
Companies Act or the Company's Articles of Association, there are no other
outstanding options, warrants, rights (including conversion or preemptive rights
and rights of first refusal), proxy or stockholder agreements or agreements of
any kind for the purchase or acquisition from the Company of any of its
securities. The Company is not a party or subject to any agreement or
understanding, and, to BHI's knowledge, there is no agreement or understanding
between any persons that affects or relates to the voting or giving of written
consents with respect to any security or the voting by a director of the
Company.

     SECTION 6. SUBSIDIARIES. The Company does not own or control, directly or
indirectly, any interest in any other corporation, partnership, limited
liability company, association, or other business entity. The Company is not a
participant in any joint venture, partnership, or similar arrangement.

     SECTION 7. CONTRACTS AND OTHER COMMITMENTS. Except as set forth on Section
7 of the Disclosure Schedule, the Company does not have and is not bound by any
contract, agreement, lease, commitment, or proposed transaction, judgment,
order, writ or decree, written or oral, (each a "Material Contract"), other than
(i) contracts for the purchase of supplies and services that were entered into
in the ordinary course of business and that do not involve more than E50,000,
and do not extend for more than one (1) year beyond the date hereof, (ii) sales
contracts entered into in the ordinary course of business, and (iii) contracts
terminable at will by the Company on no more than thirty (30) days' notice
without cost or liability to the Company and that do not involve any employment
or consulting arrangement and are not material to the conduct of the Company's
business. For the purpose of this paragraph, employment and consulting contracts
and contracts with labor unions, and license agreements and any other agreements
relating to the Company's acquisition or disposition of patent, copyright, trade
secret or other proprietary rights or technology (other than standard end-user
license agreements), agreements granting exclusivity rights to third parties, or
agreements that restrict the Company's ability to business in any business
sector or territory shall be considered a Material Contract. Each of the
Material Contracts is valid, binding on the Company and, to the knowledge of BHI
each other party thereto and in full force and effect, enforceable by the
Company in accordance with its terms. The Company has not assigned, pledged,
transferred, or otherwise disposed of or granted any Liens, mortgages on its
rights, titles and interests under any of the Material Contracts to any other
person, nor, to the knowledge of BHI, has any other party to the Material
Contracts so assigned, pledged, transferred, granted any Lien or mortgage on, or
otherwise disposed of any of its rights, title and interests thereunder. Except
as set forth on Section 7 of the Disclosure Schedule, neither the Company nor,
to the knowledge of BHI, any other party to any of the Material Contracts is in
material breach or material default thereunder. Except as set forth

                                       2

<PAGE>

on Section 7 of the Disclosure Schedule, to the knowledge of BHI, no condition
exists or event has occurred and is continuing as of the date hereof and the
Closing which, with or without the lapse of time or the giving of notice, or
both, would constitute a material default by any party under any Material
Contract or give rise to any Lien, mortgage or right of termination,
modification, cancellation, prepayment, suspension, limitation, revocation or
acceleration against the Company under any such Material Contract. The Company
has not received any notice of termination, or intent to terminate, with respect
to any Material Contract, and to the knowledge of BHI, no party to any Material
Contract has threatened to terminate any Material Contract.

     SECTION 8. RELATED-PARTY TRANSACTIONS. Section 8 of the Disclosure Schedule
sets forth all obligations, loans, debts, agreements and transactions (i)
between the Company and the Company's Affiliates, including, without limitation,
BHI and RSL and ALO and (ii) between the Company and any of the officers,
directors, equity holders or employees, or any of the Affiliates or associates
of the Company. Except as set forth on Section 8 of the Disclosure Schedule, no
officer or director of the Company or any parent, child or spouse of any of such
persons, or any trust, partnership or corporation in which any of such persons
has or has had an interest has or has had, directly or indirectly, (x) any
interest or involvement in any entity which furnished or sold, or furnishes or
sells, services or products which the Company furnishes or sells, or proposes to
furnish or sell, or (y) any interest or involvement in any entity which
purchases from or sells or furnishes to, the Company, any goods or services;
provided, that ownership of no more than one percent of the outstanding voting
stock of a publicly traded corporation in and of itself shall not be deemed an
interest in any entity for purposes of this Section 8. Except as set forth on
Section 8 of the Disclosure Schedule, no Affiliate of the Company (a) owns any
property or right, tangible or intangible, which is used in the business of the
Company or (b) has any claim or cause of action against the Company. Except as
described on Section 8 of the Disclosure Schedule, each transaction set forth
thereon is on terms that are (i) consistent with past practice of the Company
and (ii) at least as favorable to the Company as would be available with
independent third parties dealing at arms' length.

     SECTION 9. REGISTRATION RIGHTS. The Company is presently not under any
obligation and has not granted any rights to register under the Joint Stock
Companies Act any of its presently outstanding securities or any of its
securities that may subsequently be issued.

     SECTION 10. PERMITS. The Company has all franchises, permits, licenses, and
any similar authority necessary for the conduct of its business as now being
conducted by it, the lack of which would not reasonably be expected to have,
individually or in the aggregate, a material adverse effect on its business,
properties, prospects, or financial condition of the Company (a "Material
Adverse Effect"), and believes it can obtain, without undue burden or expense,
any similar authority for the conduct of its business as presently planned to be
conducted. The Company is not in default in any respect under any of such
franchises, permits, licenses or other similar authority, which default could
have a Material Adverse Effect.

     SECTION 11. TYPE C2 INDIVIDUAL LICENSE.

          (a) The Company does not hold any licenses, pending applications for
licenses and any other authorizations issued by the Ministry of Development
(Ministerio de Fomento), now the Ministry of Industry, Tourism and Trade
(Ministerio de Industria, Turismo y

                                       3

<PAGE>

Comercio) (the "Ministry"), except for the Type C2 Individual License granted by
Order of the Ministry of Development dated March 8, 2000 (the "Type C2
Individual License"). There is no condition outside of the ordinary course
imposed on Type C2 Individual License by the Ministry except those that are
either set forth on the face of the Type C2 Individual License, as issued by the
Ministry. The Type C2 Individual License constitutes all authorizations from the
Ministry necessary or required for and/or used in the operation of the channels
in the market areas listed on Section 11 of the Disclosure Schedule as of the
date of the Agreement. No Person other than the Company has any right, title,
interest or claim in or to the Type C2 Individual License. The Type C2
Individual License has been granted to the Company by final order and is in full
force and effect.

          (b) Except for those described in Section 11 of the Disclosure
Schedule, there is not pending or, to the knowledge of BHI, threatened against
the Company or the Type C2 Individual License any application, action, petition,
objection or other pleading, or any proceeding with the Ministry or any other
Governmental Authority, which (i) questions or contests the validity of, or
seeks the revocation, forfeiture, non-renewal or suspension of the Type C2
Individual License, (ii) seeks the imposition of any modification or amendment
with respect to the Type C2 Individual License, (iii) which would adversely
affect the ability of the Company and/or BHI to consummate the transactions
contemplated by this Agreement or (iv) seeks the payment of a fine, sanction,
penalty, damages or contribution in connection with the use of the Type C2
Individual License. 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 Ministry or any other Governmental Authority and the Company
has not received any warning or other correspondence regarding the usage (or
lack thereof) of the Type C2 Individual License. There is no unsatisfied adverse
regulatory order or ruling outstanding against the Company or the Type C2
Individual License. The Company is not a party to any complaint or proceeding at
the Ministry or at the Telecommunications Market Commission regarding the Type
C2 Individual License.

          (c) The Company has not agreed to accept or allow any electromagnetic
interference from any other electronic communications licensees, permittees or
applicants with respect to the Type C2 Individual License and/or channels, and
no such licensees, permittees or applicants have agreed to accept
electromagnetic interference from the Company with respect to their respective
facilities.

          (d) The Company 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. Since the issuance of the Type C2 Individual License,
the Company has complied in all material respects with all of the terms and
conditions of the Type C2 Individual License. The Type C2 Individual License is
free and clear of all Liens, mortgages, and is unimpaired by any acts or
omissions of the Company, its agents, assignees and licensees. All material
documents required to be filed at any time by the Company with the Ministry or
the Telecommunications Market Commission with respect to the Type C2 Individual
License have been timely filed or the time period for such filing has not
lapsed. All such documents filed since the date that the Type C2 Individual
License were issued to the Company are correct in all material respects. All
amounts owed to the Spanish Administration (in particular, to the Ministry, the
Telecommunications

                                       4

<PAGE>

Market Commission or the Ministry of Treasure -Ministerio de Hacienda) in
connection with the Type C2 Individual License have been timely paid.

          (e) The facilities subject to the Type C2 Individual License for which
certification of completion of construction has been filed with the Ministry are
operating and have been operating, in material compliance with the Type C2
Individual License therefore and the applicable rules. The Company is not
transmitting from or otherwise operating any facility that is not the subject of
a license of the relevant local authority. None of the facilities subject to the
Type C2 Individual License is (a) authorized pursuant to an authorization which
is subject to challenge before the relevant local authority or any court of
competent jurisdiction or (b) subject to any lease, sublease or any agreement to
make it available to a third party. None of the facilities subject to the Type
C2 Individual License are operating pursuant to special temporary or
developmental authority.

     SECTION 12. COMPLIANCE WITH OTHER INSTRUMENTS. The Company is not in
violation or default in any respect of any provision of its Bylaws or of any Law
applicable to the Company, which default could have a Material Adverse Effect.
The execution, delivery, and performance by the Company of this Agreement and
any Ancillary Agreement, and the consummation of the transactions contemplated
hereby and thereby, will not result in any such violation or be in conflict with
or constitute, with or without the passage of time or giving of notice, either a
default under any such provision or an event that results in the creation of any
Lien, mortgage, or the suspension, revocation, impairment, forfeiture, or
nonrenewal of any permit, license, authorization, or approval applicable to the
Company, its business or operations, or any of its assets or properties. The
execution, delivery, and performance by the Company of this Agreement and any
Ancillary Agreement, and the consummation of the Transactions, will not result
in the Company losing the benefit of any right or privilege it presently enjoys
nor to the knowledge of the Company, in any person who normally does business
with or gives credit to the Company not continuing doing so on the same basis
nor in any officer or senior employee of the Company leaving his/her employment.

     SECTION 13. LITIGATION. Except as set forth on Section 13 of the Disclosure
Schedule, there is no action, suit, proceeding, or investigation pending or, to
the knowledge of BHI, currently threatened against the Company or BHI that
questions the validity of this Agreement or any Ancillary Agreement or the right
of BHI to enter into such agreements, or to consummate the Transactions, or that
might result, either individually or in the aggregate, in a Material Adverse
Effect, or in any material change in the current equity ownership of the
Company. The foregoing includes, without limitation, any action, suit,
proceeding, or investigation pending or, to the knowledge of BHI, currently
threatened involving the share capital reduction and subsequent capital increase
resolved by the Company on August 5, 2005, the prior employment of any of the
Company's employees, their use in connection with the Company's business of any
information or techniques allegedly proprietary to any of their former
employers, their obligations under any agreements with prior employers, or
negotiations by the Company with potential backers of, or investors in, the
Company or its proposed business. Except as set forth on Section 13 of the
Disclosure Schedule, the Company is not at present engaged whether as plaintiff
or defendant or otherwise in any legal action, proceedings or arbitration
(whether civil, criminal, administrative, labor or insolvency) or is being
prosecuted for any criminal offence and, to the knowledge of BHI, there are no
investigations, disciplinary proceedings or other

                                       5

<PAGE>

circumstances likely to lead to any such claim or legal action, proceedings or
arbitration (other than as aforesaid).

     SECTION 14. INSOLVENCY. The Company is not is a financial situation which
requires a share capital increase or decrease or the dissolution of the Company
and the Company has neither resolved on its dissolution, merger, spin-off
(demerger), share swap or contributions of assets or branch of activity, or the
acquisition of its own shares. No petition before the court has been presented
by the Company, or to the knowledge of BHI, by its creditors for suspension of
payments, bankruptcy or insolvency (concurso) and the Company is not a party to
any such proceedings. No administrative receiver has been appointed for any
property or assets of the Company. No arrangement between the Company and its
creditors has been proposed, sanctioned or approved. Neither the suspension of
payments proceedings or RSL, nor the possible rescission or breach of the
agreement between RSL and its creditors is likely to have any adverse effect on
the assets or activities of the Company, or the transactions contemplated by
this Agreement or any Ancillary Agreement.

     SECTION 15. POWERS OF ATTORNEY. Except as set forth on Section 15 of the
Disclosure Schedule, the Company has not given a power of attorney or any other
authority (express, implied or ostensible) which is still outstanding or
effective to any person to enter into any contract or commitment or do anything
on its behalf, other than any authority to employees to enter into ordinary
trading contacts in the normal course of their duties.

     SECTION 16. DISCLOSURE. BHI and the Company have provided Clearwire with
all the information reasonably available to it without undue expense that such
Clearwire has requested for deciding whether to purchase the Shares in the terms
set forth in this Agreement and all information that BHI and the Company believe
is reasonably necessary to enable such Clearwire to make such decision. Neither
this Agreement nor any other agreements or certificates executed in connection
herewith contains any untrue statement of a material fact or omits to state a
material fact necessary to make the statements herein or therein not misleading.

     SECTION 17. FINANCIAL STATEMENTS. The Company has delivered to Clearwire
its audited financial statements (balance sheet, profit and loss account, and
annual report together with all the notes, reports, statements or documents
included in or annexed or attached to them) at December 31, 2004 and for the
fiscal year then ended and its unaudited financial statements (balance sheet and
profit and loss statement) as at, and for the nine-month period ended September
30, 2005 (the "Balance Sheet Date", and collectively the "Financial
Statements"). The Financial Statements have been prepared in accordance with the
Joint Stock Companies Act and with generally accepted accounting principles in
Spain applied on a consistent basis throughout the periods indicated and with
each other, except that unaudited Financial Statements may not contain all
footnotes required by generally accepted accounting principles. The Financial
Statements fairly present the financial condition and operating results of the
Company as of the dates, and for the periods, indicated therein, subject in the
case of the unaudited Financial Statements to normal year-end audit adjustments
and contain (i) full provisions or reserves for taxation liable to be assessed
on the Company as well as for all actual liabilities; (ii) proper provisions or
reserves for deferred taxation as well as for all contingent liabilities; and;
(iii) adequate provisions for all bad and doubtful debts. Except as set forth in
the Financial Statements, the Company has no material liabilities, contingent or
otherwise, other than

                                       6

<PAGE>

liabilities incurred in the ordinary course of business subsequent to the
Balance Sheet Date, which, individually or in the aggregate, are not material to
the financial condition or operating results of the Company. Except as disclosed
in the Financial Statements, the Company is not a guarantor or indemnitor of any
indebtedness of any other person, firm, or corporation. The Company maintains
and will continue to maintain a standard system of accounting established and
administered in accordance with generally accepted accounting principles.

     SECTION 18. TITLE TO PROPERTY AND ASSETS; LEASES. Except as reflected in
the Financial Statements and on Section 18 of the Disclosure Schedule, the
Company has good and marketable title to its property and assets free and clear
of all Liens, mortgages, prohibitions from disposal, leases, assignments or
restriction of any kind on their use. Except as set forth on Section 18 of the
Disclosure Schedule, with respect to the property and assets it leases, the
Company is in compliance with such leases and holds a valid leasehold interest
free of any Liens and mortgages, there being no restrictions in the relevant
lease agreements which prevent the property being used now or in the future for
the present use. No buildings, installations or works have been placed or
undertaken at the Company's properties, either owned or leased, which are in
breach of the Town and Country Planning legislation or any other Acts of
Parliament or any regulations, by-laws, orders, consents or permissions made or
given thereunder. The assets are owned by, or leased to, the Company and are
sufficient for the conduct of the business and operation of the Company as
presently conducted and as proposed to be conducted. The tangible assets of the
Company are in good operating condition, ordinary wear and tear excepted, and
are suitable for the purposes for which they are intended.

     SECTION 19. ABSENCE OF CHANGES. Except as set forth on Section 19 of the
Disclosure Schedule, since the Balance Sheet Date, the Company has conducted its
business in the ordinary course and there has not been (i) any material adverse
change having, or any event or condition which has had, or could reasonably be
expected to have, a Material Adverse Effect; (ii) any waiver of any valuable
right of the Company, the cancellation of any valuable right of the Company, or
the cancellation of any material debt or claim held by the Company; (iii) any
payment or declaration of dividends on, or other distribution with respect to,
or any direct or indirect redemption or acquisition of, any securities of the
Company; (iv) any issuance of any stock, bonds or other securities of the
Company or any split, combination or reclassification of the Company's capital
stock; (v) any sale, assignment or transfer of any tangible or intangible assets
of the Company, except in the ordinary course of business, and assets which are
not, individually or in the aggregate, material; (vi) any loan by the Company to
any officer, director, employee, consultant or shareholder of the Company (other
than advances to such persons in the ordinary course of business in connection
with travel and travel related expenses); (vii) any damage, destruction or loss
(whether or not covered by insurance) materially and adversely affecting the
assets; (viii) any change in the accounting or tax methods, practices or
policies or in any tax election of the Company; (ix) any indebtedness incurred
for borrowed money other than in the ordinary course of business; (x) any
amendment to or termination of any Material Contracts (other than amendments to
or terminations of agreements pursuant to or contemplated by this Agreement);
(xi) any satisfaction or discharge of any Lien, mortgage or payment of any
obligation by the Company, except in the ordinary course of business; (xii) any
material change in any compensation arrangement or agreement with any employee,
officer, director or stockholder or the Company; (xiii) any mortgage, pledge,
transfer of a security interest in, or Lien or mortgage, created by the Company,
with respect to any of its material properties or

                                       7

<PAGE>

assets, except Liens or mortgages for taxes not yet due or payable; or (ix) any
agreement or commitment (contingent or otherwise) to do any of the foregoing.

     SECTION 20. INTELLECTUAL PROPERTY RIGHTS. To the knowledge of BHI, the
Company owns or possesses sufficient legal rights to all patents, trademarks,
service marks, trade names, copyrights, trade secrets, information and other
proprietary rights and processes (collectively "Intellectual Property Rights")
necessary for its business as presently conducted and as proposed to be
conducted, without any known infringement of the right or others. Section 20 of
the Disclosure Schedule lists all of the Company's Intellectual Property Rights.
To the knowledge of BHI (a) the Company is not infringing upon, violating or
otherwise acting adversely to, or that by conducting its business as proposed
that it would infringe upon, violate or otherwise act adversely to, the right or
claimed right of any person under or with respect to any Intellectual Property
Rights or licenses of third parties, or (b) there is not pending or threatened
any opposition, claim or litigation against or affecting the Company contesting
its right to register, sell or use any of its Intellectual Property Rights, or
(c) no third party is infringing upon, violating or otherwise acting adversely
to, or that by conducting its business as proposed that it would infringe upon,
violate or otherwise act adversely to the Company's Intellectual Property. To
the knowledge of BHI, none of the Intellectual Property Rights presently
contemplated to be employed by the Company is infringing upon any copyright
owned by any other person. To the knowledge of BHI, the Company has the right to
require the applicant, inventor, or author of any Intellectual Property Rights
of the Company to transfer to the Company ownership of, including all right,
title and interest in and to (including any moral rights) any corresponding
application or registration once it issues. Except as set forth in Section 19 of
the Disclosure Schedule, the Company has not granted any licenses, options or
other rights in Intellectual Property Rights to any Person, and the Company is
not obligated or under any liability to make payments by way of royalties, fees
or otherwise to any owner, licensor of, other claimant to, or party to any
option, license or agreement of any kind with respect to, any Intellectual
Property Rights, or other intangible asset, except for commercially available
software licensed on standard terms. Each employee and officer of the Company
has executed a proprietary information and inventions agreement substantially in
the form or forms, which have been delivered to Clearwire.

     SECTION 21. EMPLOYEES; EMPLOYEE COMPENSATION. To BHI's knowledge, there is
no strike, labor dispute or union organization activities pending or threatened
between it and its employees. The Company has complied in all material respects
with the applicable Collective Bargaining Agreement and with all applicable
equal opportunity and other Laws related to employment, Social Security and
Health and Safety at Work and is up to date in the performance of the
obligations arising for the Company under its employment agreements. To BHI's
knowledge, no employee of the Company is in violation of any judgment, decree,
or order, or any term of any employment contract, patent disclosure agreement,
or other contract or agreement relating to the relationship of any such employee
with the Company, or any other party because of the nature of the business
conducted or presently proposed to be conducted by the Company. Except as set
forth on Section 21 of the Disclosure Schedule, the Company is not a party to or
bound by any currently effective deferred compensation agreement, bonus plan,
incentive plan, profit sharing plan, retirement agreement, or other employee
compensation agreement and it has not undertaken any commitment for remuneration
in cash or in kind or for the case of dismissal, resignation or retirement in
connection with their employees, executives or personnel engaged under service
agreements. Section 21 of the Disclosure Schedule contains full

                                        8

<PAGE>

particulars of all labor agreements with employees of the Company including:
age, position, duration, salary, remuneration, seniority, anticipated retirement
compensations, acquired rights, social benefits, or any other compensations,
gratifications or severance payments or other rights. All the employment
contracts, including their terms and conditions, have been drafted in accordance
with the requirements established by Spanish Law. There are no persons not
mentioned in Section 21 of the Disclosure Schedule who are entitled to claim the
Company to be considered as an employee thereof. Except as set forth on Section
21 of the Disclosure Schedule, there are no amounts owing to any present or
former directors or employees of the Company and the Company is not aware that
any officer or key employee, or that any group of key employees, intends to
terminate their employment with the Company, nor does the Company have a present
intention to terminate the employment of any of the foregoing. Subject to
general principles related to termination of employees under Spanish law, the
employment of each officer and employee of the Company is terminable at the will
of the Company. The Company is duly registered as an employer at the Social
Security. In addition, all its employees are duly registered as employees.
Except as set forth on Section 21 of the Disclosure Schedule, the Company is up
to date in the payment of its Social Security obligations and all payments and
contributions to the Social Security that must be paid by the Company have been
paid according to the law. Except as set forth on Section 21 of the Disclosure
Schedule, there are no agreements in force subscribed with the Spanish Social
Security Authorities regarding the payment of the Social Security contributions.

     SECTION 22. TAX RETURNS, PAYMENTS, AND ELECTIONS. Except as set forth on
Section 22 of the Disclosure Schedule, the Company has complied with any
obligation to register for the purposes of VAT, goods and services tax, sale
tax, business transfer tax, customs duties and similar taxes. Except as set
forth on Section 22 of the Disclosure Schedule, the Company has timely filed all
tax returns and reports (autonomic, state and local) as required by Law. Except
as set forth on Section 22 of the Disclosure Schedule, these returns and reports
are true and correct in all material respects and the Company has not
incorrectly enjoyed any tax allowance nor has it incorrectly used any tax losses
nor incorrectly applied any special tax regime. The transfer pricing of
intra-company agreements has been agreed at such a level that, to the knowledge
of BHI, and taking into account both the Spanish legislation on transfer-pricing
and the precedents of the Spanish Tax Authorities, should not be subject to any
particular review by the Tax Authorities which could result in additional taxes
to be paid by the Company on those agreements. The Company has paid all taxes
and other assessments due, except those contested by it in good faith. The
provision for taxes of the Company as shown in the Financial Statements is
adequate for taxes due or accrued as of the date thereof, with the corresponding
interest, surcharges and sanctions which may be applicable. Except as set forth
on Section 22 of the Disclosure Schedule, the Company has never had any tax
deficiency proposed or assessed against it and has not executed any waiver of
any statute of limitations on the assessment or collection of any tax or
governmental charge and there is no tax inspection of the Company in progress or
known to either the Company or to BHI. Except as set forth on Section 22 of the
Disclosure Schedule, none of the Company's tax returns has ever been audited by
governmental authorities. Since the date of the Financial Statements, the
Company has made adequate provisions on its books of account for all taxes,
assessments, and governmental charges with respect to its business, properties,
and operations for such period. The Company has deducted or withheld from the
recipients of payments, including employees, independent professionals,
directors, agents, etc., the correct and precise amounts for all the relevant
Tax periods in

                                        9

<PAGE>

compliance with the applicable tax provisions, and has paid the same to the
proper tax receiving officers or authorized depositaries.

     SECTION 23. INSURANCE. Except as set forth in Section 23 of the Disclosure
Schedule, the Company has in full force and effect fire and casualty insurance
policies, with extended coverage, sufficient in amount (subject to reasonable
deductibles) to allow it to replace any of its properties that might be damaged
or destroyed. The Company has in full force and effect adequate insurance
coverage against accident, third party injury, commercial general liability,
errors and omissions, damage and other risks normally covered by insurance by
such companies. In respect of all such insurances: (i) all premiums have been
duly paid to date; (ii) all the policies are in force and are not avoidable on
account of any act, omission or non-disclosure on the part of the insured party;
(iii) there are no special or unusual terms or restrictions, the premiums
payable are not in excess of the normal rates and no circumstances exist which
are likely to give rise to any increase in premiums; (iv) no claim is
outstanding, unpaid or in dispute and no circumstances exist which are likely to
give rise to any claim; (v) full particulars are contained in the Disclosure
Schedule.

     SECTION 24. ENVIRONMENTAL AND SAFETY LAWS. The Company is not in violation
of any applicable Law relating to the environment or occupational health and
safety, which violation may cause a Material Adverse Effect. To BHFs knowledge,
no material expenditures are or will be required in order to comply with any
such existing statute, law, or regulation.

     SECTION 25. CORPORATE BOOKS. The copy of the minute books of the Company
provided to Clearwire's counsel contains minutes of all meetings of directors
and stockholders and all actions by written consent without a meeting by the
directors and stockholders since the date of incorporation and accurately
reflects all actions by the directors (and any committee of directors) and
stockholders with respect to all transactions referred to in such minutes in all
material respects. The statutory books, books of account and other records of
whatsoever kind of the Company are up-to-date and maintained in accordance with
all applicable legal requirements on a proper and consistent basis and contain
complete and accurate records of all matters required to be dealt with in such
books and all such books and records and all other documents (including
documents of title and copies of all subsisting agreements to which the Company
is a party) which are the property of the Company or ought to be in its
possession are in its possession or under its control and no notice or
allegation that any is incorrect or should be rectified has been received. All
accounts, documents and returns required by law to be delivered or made to the
Registrar of Companies or any other authority have been duly and correctly
delivered or made.

     SECTION 26. SECURITIES REPRESENTATIONS.

          (a) BHI is an "accredited investor" as that term is defined in Rule
501 of Regulation D promulgated under the Securities Act of 1933, as amended
(the "Securities Act"). BHI is not a "U.S. person" as that term is defined under
Rule 902 of Regulation S promulgated under the Securities Act. This Agreement
has been executed by BHI outside the "United States" (as defined in Rule 902(1)
of Regulation S). BHI is acquiring the Shares in an "offshore transaction" (as
defined in Rule 902(h) of Regulation S). The Shares were not offered to BHI in

                                       10

<PAGE>

the United States and at the time of execution of this Agreement and the time of
any offer to BHI to purchase the Shares hereunder, BHI was physically outside of
the United States

          (b) BHI is not acquiring the Shares for the account or benefit of any
U.S. person. The Shares are being acquired by BHI for investment purposes only,
for BHI's own account and not with the view to any resale or distribution
thereof, and BHI is not participating, directly or indirectly, in an
underwriting of such Shares, and will not take, or cause to be taken, any action
that would cause BHI to be deemed an "underwriter" of such Shares as defined in
Section 2(11) of the Securities Act. BHI acknowledges that BHI has been offered
an opportunity to ask questions of, and received answers from, Parent concerning
Parent and its proposed investments, and that, to BHI's knowledge, Parent has
fully complied with any request for such information. BHI has such knowledge and
experience in financial and business matters as to be capable of evaluating the
merits and risks of an investment in the Shares, is able to bear such risks, and
has obtained, in BHI's judgment, sufficient information from Parent to evaluate
the merits and risks of an investment in the Shares. BHI has evaluated the risks
of investing in Parent and has determined that the Shares are a suitable
investment for BHI.

          (c) BHI is not relying on Parent with respect to tax and other
economic considerations involved in this transaction. BHI acknowledges that BHI
has been advised by Parent to consult with its tax or financial consultants
prior to entering into this Agreement.

                                       11

<PAGE>

                                   SCHEDULE B
                  REPRESENTATIONS AND WARRANTIES OF CLEARWIRE

     SECTION 1. ORGANIZATION; GOOD STANDING; QUALIFICATION. Clearwire is a
company duly organized, validly existing, and in good standing under the laws of
the Luxembourg. Parent is a company duly organized, validly existing, and in
good standing under the laws of the State of Delaware. Each of Clearwire and
Parent has all requisite corporate power and authority to execute and deliver,
and carry out the provisions of, this Agreement and any Ancillary Agreement to
which it is a party.

     SECTION 2. AUTHORIZATION. All corporate action on the part of each of
Clearwire and Parent, its officers, directors and stockholders necessary for the
authorization, execution and delivery of this Agreement and any Ancillary
Agreement to which it is a party, the performance of all obligations of
Clearwire and Parent hereunder and thereunder at the Closing, and this Agreement
and any Ancillary Agreement to which it is a party, when executed and delivered,
will constitute valid and legally binding obligations of Clearwire and Parent,
enforceable in accordance with their respective terms except (i) as limited by
applicable bankruptcy, insolvency, reorganization, moratorium, and other laws of
general application affecting enforcement of creditors' rights generally, and
(ii) as limited by laws relating to the availability of specific performance,
injunctive relief, or other equitable remedies.

     SECTION 3. VALID ISSUANCE OF CLEARWIRE STOCK. The Clearwire Stock that is
being delivered to BHI hereunder, when issued, and delivered in accordance with
the terms of this Agreement for the consideration expressed herein, will be duly
and validly issued, fully paid, and nonassessable, and will be free of Liens,
mortgages and restrictions on transfer other than restrictions on transfer under
this Agreement and the Parent's shareholders agreement to which BHI will become
a party and under applicable securities laws.

     SECTION 4. GOVERNMENTAL CONSENTS. No consent, approval, qualification,
order or authorization of, or filing with, any Governmental Authority is
required on the part of Clearwire in connection with Clearwire's or Parent's
valid execution, delivery, or performance of this Agreement.

                                       1

<PAGE>

                                   SCHEDULE C
             INTERCOMPANY INVOICING GIVING RISE TO VAT TRANSACTIONS

(1)  E416,726.19 of VAT as a consequence of:

     -    Invoice no. ALO-I63 issued by RSL and dated July 1, 2005; and

     -    Invoice no. ALO-I57 issued by RSL and dated July 1, 2005.

                                       2

<PAGE>

                                   EXHIBIT A

<PAGE>

Clearwire Europe S.a.r.l.
5808 Lake Washington Blvd. Suite 300
Kirkland, WA 98033
Attention: Vice President, Legal Affairs
Facsimile: (425) 216-7900

                                                                December 7, 2005

Ladies and Gentlemen:

We have acted as legal counsel in Spain to Banda Ancha, S.A., a company
organized under the laws of Spain (the "Company") and BASA Holdings Iberia,
S.L.U., a sociedad limitada organized under the laws of Spain ("BHI") in
connection with the transactions contemplated by a certain Investment Agreement
entered into on [______] (the "Investment Agreement") among the Company, BHI,
Clearwire Europe S.a.r.l., a private limited liability company formed under the
laws of Luxembourg ("Clearwire"), and Clearwire Corporation, a Delaware
corporation ("Parent"), and a certain Securities Purchase Agreement entered into
on [_____] (the "Purchase Agreement" and collectively with the Investment
Agreement the "Agreements") among BHI, Clearwire and Parent.

This opinion letter is provided to you at the request of the Company pursuant to
Section 2.1(h)(iii) of the Purchase Agreement.

Capitalized terms used and not otherwise defined in this opinion letter have the
meanings defined in the Agreements.

A.   Documents and Matters Examined

In connection with this opinion letter, we have examined originals, or copies
certified or otherwise identified to our satisfaction, of such documents,
records, certificates and statements of government officials, officers and other
representatives of the persons referred to therein, and such other documents, as
we have deemed relevant or necessary as the basis for the opinions herein
expressed, including the following (each dated [____], unless otherwise noted):

     (i)  The Investment Agreement

     (ii) The Securities Purchase Agreement.

     (iii) The Shareholders Agreement by and among the Company, BHI, Clearwire
          and Parent (the "Shareholders Agreement"),

     (iv) Bylaws of the Company,

     (v)  The Indemnification Agreement by and among the Company, BHI, Clearwire
          and Parent (the "Indemnification Agreement"),

     (vi) The Credit Facility Agreement by and between BHI and Clearwire (the
          "Credit Facility Agreement"),

     (vii) The Share Pledge Agreement by and between BHI and Clearwire (the "BHI
          Share Pledge Agreement"), for the pledge over 1,200,000 shares of the
          Company, in favor of Clearwire (the "Pledge Agreement").

<PAGE>

     (viii) The Share Pledge Agreements between BHI and Clearwire (the
          "Clearwire Share Pledge Agreements"), for the pledge of shares of
          Parent, in favor of Clearwire.

     (ix) A side letter agreement regarding the Parent Stockholders Agreement
          between BHI and Parent (the "Shareholder Side Letter");

     (x)  a joinder to an Amended and Restated Stockholders Agreement, dated
          March 16, 2004 by and among Parent and Parent's stockholders;

     (xi) a joinder to the Registration Rights Agreement by and among Parent and
          certain of Parent's stockholders.

The documents listed in (i) through (ix) are sometimes referred to herein
collectively as the "Transaction Documents".

In our examination, we have assumed the genuineness of all signatures, the
authenticity of all documents submitted to us as originals, the accuracy and
completeness of all documents submitted to us as copies and the authenticity of
the originals of such latter documents. As to any facts material to such
opinions which were not independently established, we have relied upon
statements or representations of officers and other representatives of the
Company and BHI. We have assumed the valid authorization, execution and delivery
of each of the agreements and documents referred to herein by each party thereto
other than the Company and BHI.

We have not made any independent review or investigation of agreements,
instruments, orders, judgments, rules or other regulations or decrees by which
the Company and BHI, or any of its properties may be bound, nor we have made an
independent investigation as to the existence of actions, suits, investigations
or proceedings, pending or threatened, against the Company or BHI.

The law covered by the opinions expressed herein is limited to the laws of the
Kingdom of Spain. We have made such examination of Spanish law as we have deemed
relevant for the purposes of this opinion, but we do not represent ourselves to
be familiar with the laws of any jurisdiction other than Spain and accordingly
we express no opinion as to the laws of any state or jurisdiction other than
Spain.

B.   OPINIONS

Based on the foregoing examinations and assumptions and subject to the
qualifications and exclusions stated below, we are of the opinion that:

     1.- The Company is a company duly incorporated, validly existing and in
good standing under the laws of the Kingdom of Spain, and, to the best of our
knowledge, it is not affected by any grounds which under Article 163,1, second
paragraph or Article 260, 4, of the Corporations Acts ("Ley de Sociedades
Anonimas" or "LSA") oblige to adjust the share capital figure or to dissolve it
nor has it initiated or received any request from third parties to initiate
bankruptcy proceedings.

     2.- BHI is a sociedad limitada duly incorporated, validly existing and in
good standing under the laws of the Kingdom of Spain, and, to the best of our
knowledge, it is not affected by any grounds which under Article 163,1, second
paragraph or Article 260, 4, of the

                                       -2-

<PAGE>

LSA oblige to adjust the share capital figure or to dissolve it nor has it
initiated or received any request from third parties to initiate bankruptcy
proceedings.

     3.- Each of BHI and the Company has the requisite corporate power and
authority to execute and deliver its obligations under the Transaction
Documents.

     4.- Immediately prior to execution of the Investment Agreement and
completion of the capital increase referred to therein, the share capital of the
Company was 4,563,862 Euros, divided into 4,563,862 shares, par value of
E1.00 each, and BHI was the owner of record of all such shares, free and
clear of any security interest, lien or encumbrance.

     5.- The 4,750,143 shares that have been subscribed by Clearwire as a
consequence of the capital increase agreed upon pursuant to the Investment
Agreement at a total subscription price of E4,750,143, par value E1.00
per share, were duly and validly issued, and represented at the time of
subscription 51% of the share capital of the Company.

     6.- To our knowledge, as of the date of the Investment Agreement, except as
described in the Transaction Documents, there were no other presently
outstanding preemptive rights, options, warrants, conversion privileges or
rights to purchase from the Company any of the issued stock of the Company, nor
any other pending resolutions or arrangements that could imply a dilution of
capital percentage of 51% that corresponds to Clearwire following the
subscription capital described in paragraph 5 above.

     7.- All corporate and prior regulatory action necessary for the
authorization, execution, delivery of the Transaction Documents by each of the
Company and BHI as well as by the companies of their group (as defined in
article 4 of the Ley del Mercado de Valores) and the performance by each of the
Company and BHI of the obligations to be performed by each as of the date hereof
under the Transaction Documents has been taken on the part of their respective
directors and stockholders.

     8.- The Transaction Documents constitute valid and binding obligations of
the Company and BHI (to the extent each is a party to such Transaction Document)
enforceable against the Company and BHI (to the extent each is a party to such
Transaction Document) in accordance with their respective terms. Each of the
Transaction Documents to which it is a party has been duly executed and
delivered by the Company and BHI.

     9.- Neither the Company's nor BHI's execution, delivery and performance of
its obligations under the Transaction Documents will, as of the Closing, result
in (i) a violation of such party's Articles of Association or Bylaws; (ii) a
material violation of the LSA, or any statute, rule or regulation or law of the
Kingdom of Spain applicable to the Company or BHI, as applicable; or, (iii) a
violation of any judgment or order issued in a proceeding where we have assumed
the legal defense of the case.

                                       -3-

<PAGE>

     10.- Except as set forth in the Transactions Documents, no consent,
approval or authorization of or designation, declaration or filing with, any
governmental authority or pursuant to the LSA is required on the part of the
Company or BHI as a condition to the Company's or BHI's valid execution,
delivery and performance of its obligations under the Transaction Documents.

     11.- The BHI Share Pledge Agreement creates in the Clearwire's favor, a
security for the obligations of BHI stated therein to be so secured, and a
security interest in the Pledged Shares (as defined in the Share Pledge
Agreement).

     12.- To our knowledge and without any independent investigation but in the
ordinary advice that we provide to the Company and BHI, and except as set forth
on the Company Disclosure Schedule to the Investment Agreement, there is no
action, suit, proceeding or investigation pending against either the Company or
BHI that questions the validity of the Transaction Documents or the right of the
Company or BHI to enter into the Transaction Documents; and there is no action,
suit, proceeding or investigation where we have assumed the legal defense,
which, if determined adversely, would be likely to result in a material adverse
change in the Company's business, assets, results of operations or financial
condition.

Very truly yours,

Baker & McKenzie

                                       -4-

<PAGE>

                                    EXHIBIT B

<PAGE>

                                PLEDGE AGREEMENT

     THIS PLEDGE AGREEMENT is entered into as of the ___ day of __________,
2005, by BASA Holding Iberia, S.L.U., a private limited liability company
organized under the laws of Spain ("Pledgor"), in favor of Clearwire Europe,
S.a.r.l., a private limited liability company organized under the laws of
Luxembourg ("Pledgee").

                                    RECITALS

     Pledgor and Pledgee are parties to that certain Credit Facility Agreement
dated of even date herewith (together with any related documents, as amended,
the "Credit Agreement"), pursuant to which Pledgee agreed to make available a
credit facility in the aggregate amount of E3,000,000 to Pledgor. On the
date hereof, Pledgee's parent company, Clearwire Corporation, a Delaware
corporation ("Parent"), has issued shares of its Class A Common Stock to Pledgor
pursuant to a securities purchase agreement by and among Parent, Pledgor and
Pledgee. To induce Pledgee to make such credit facility available to Pledgor,
Pledgor has agreed to pledge 750,000 shares of Class A Common Stock of Parent
(the "Shares") owned by Pledgor as security for the payment of the obligations
under the Credit Agreement.

                                    AGREEMENT

     NOW, THEREFORE, the parties agree as follows:

     Section 1. Pledge of Shares. In consideration of the foregoing, Pledgor
hereby grants a security interest to Pledgee in all of its right, title and
interest in and to the following personal property, whether now owned or
hereafter acquired (the "Collateral"): (a) the Shares, which are represented by
Certificate Nos.______ (the "Certificates"), (b) all securities and stock powers
delivered by Pledgor in substitution for any of the foregoing, all certificates
and instruments representing such securities and all cash and non-cash dividends
from time to time distributed in exchange for any or all thereof (all of which
Pledgor will immediately deliver to Pledgee to be held hereunder), and (c) all
cash and non-cash proceeds and products thereof. The pledge made pursuant to
this Agreement is given to secure the payment in full when due, whether at
stated maturity, by acceleration or otherwise, and the prompt performance of all
obligations of Pledgor set forth in the Credit Agreement. The Certificates, and
all stock certificates pertaining to Collateral hereafter acquired, shall be
delivered to Pledgee, accompanied by stock powers executed in blank. Pledgor
shall not encumber or dispose of the Collateral except in accordance with the
provisions of Section 5 below. Upon satisfaction of all obligations set forth in
the Credit Agreement and termination of any commitment of Pledgee to extend
credit thereunder, Pledgee shall immediately return to Pledgor the Collateral
and in any event within a maximum period of seven (7) days. Pledgee shall also
release all or part of the Collateral at such time as Pledgor places into an
escrow account for the benefit of Pledgee and on terms reasonably satisfactory
to Pledgee, and amount equal to the value of the Collateral which is being
released, determined as of the date of this Agreement (i.e. $5.00 per Share).

<PAGE>

     Section 2. Dividends. If at any time during the term of this pledge, (a)
there is a declaration of dividends by the Parent and (b) Pledgor is in breach
of the Credit Agreement, Pledgee shall be and is hereby authorized, if it should
desire, to apply said dividends to the account of Pledgor in payment of any sums
then owing by Pledgor to Pledgee. Except in the foregoing circumstance, Pledgee
shall have no right to withhold or receive any dividends paid with respect to
the Shares.

     Section 3. Voting Rights. During the term of this pledge and so long as
Pledgor is not in default under the Credit Agreement, Pledgor shall have the
right to vote the Shares on all corporate questions.

     Section 4. Liens. Pledgor represents and warrants that there are no liens,
charges, pledges or encumbrances on the Collateral, other than those of Pledgor,
and that delivery of the Collateral pursuant to this Agreement will create a
valid first priority security interest in the Collateral and the proceeds
thereof.

     Section 5. No Sale or Encumbrance. Pledgor agrees that unless and until all
obligations of Pledgor under the Credit Agreement have been paid or satisfied in
full, Pledgor shall not sell, assign, transfer, pledge or otherwise encumber any
of its rights in or to the Collateral unless Pledgor places in escrow, on terms
reasonably satisfactory to Pledgee, the portion of the proceeds from such sale
of Collateral equal to the amount of principal and interest outstanding under
the Credit Agreement at the time of such sale.

     Section 6. Further Assurances. Pledgor will, at its expense, promptly
execute, acknowledge, and deliver all such instruments and take all such action
as Pledgee may from time to time request in order to ensure the continued
existence and perfection of the security interest granted hereby. Pledgor will
defend title to the Shares against the claim of any person.

     Section 7. Stock Adjustments. In the event that, during the term of the
pledge, any stock split, reclassification, readjustment, or other change is
declared or made in the capital structure of Parent, all new, substituted and
additional shares, or other securities, issued by reason of any such change (and
not as a result of a purchase by Pledgor of additional shares), shall be held by
Pledgee under the terms of this Agreement in the same manner as the Shares
originally pledged hereunder.

     Section 8. Default and Power of Sale. In the event Pledgor defaults in the
performance of any of the terms of this Agreement or the Credit Agreement, or in
the payment of principal or interest under the Credit Agreement in accordance
with its terms, then at the option of Pledgee, the whole sum or sums remaining
unpaid under the Credit Agreement may, after any applicable periods for notice
and cure, be declared immediately due and payable. In addition to the other
rights and remedies at law or in equity available to it upon Pledgor's default,
Pledgee may transfer and register in its name or in the name of its nominee the
whole or any part of the Shares, may exchange certificates or instruments
representing or evidencing the Shares for certificates or instruments of smaller
or larger denominations, may exercise the voting rights with respect thereto
(and such right

<PAGE>

to vote shall constitute and grant to Lender an irrevocable proxy coupled with
an interest), may collect and receive all dividends and other distributions made
thereon, and may sell part or all of the Shares in one or more sales after
fourteen (14) days notice of the time and place of any public sale or of the
time after which a private sale is to take place (which notice Pledgee agrees is
commercially reasonable), and may otherwise act as though Pledgee was the
outright owner of the Shares. Pledgee shall exercise reasonable care in
preserving the Certificates representing the Shares, but shall have no
obligation to preserve the value of the Shares. At any private or public sale of
the Collateral, Pledgee shall be free to purchase all or any part of the
Collateral or to sell all or any part of the Collateral to Parent or any other
affiliate. The sale or transfer of all or any part of the Collateral to Pledgee,
Parent or any other affiliate of Pledgee shall be at Fair Market Value for such
Collateral and that the Fair Market Value shall constitute a reasonable
valuation for the Collateral. As used herein, "Fair Market Value" means (i) if
Parent has sold shares of its Common Stock for cash to an unrelated third party
within sixty days prior to the date of Pledgee's sale of the Collateral, the
price at which the shares of Common Stock were sold in the last such transaction
occurring prior to the date of Pledgee's sale of the Collateral, and (ii) if no
such transaction has occurred, the per share price of such Common Stock on the
date of Pledgee's sale of the Collateral, as determined by the Parent's board of
directors in good faith.

     Section 9. Proceeds. Out of the proceeds of any public or private sale of
any or all of the Shares, Pledgee may retain an amount equal to the obligations
secured hereby, including without limitation, unpaid principal and interest
under the Credit Agreement and expenses of the sale.

     Section 10. Miscellaneous.

               10.1 Transfer; Successors and Assigns. The terms and conditions
of this Agreement shall inure to the benefit of and be binding upon the
respective successors and assigns of the parties. Nothing in this Agreement,
express or implied, is intended to confer upon any party other than the parties
hereto or their respective successors and assigns any rights, remedies,
obligations, or liabilities under or by reason of this Agreement, except as
expressly provided in this Agreement.

               10.2 Governing Law. This Agreement and all acts and transactions
pursuant hereto and the rights and obligations of the parties hereto shall be
governed, construed and interpreted in accordance with the laws of the State of
Washington, without giving effect to principles of conflicts of law.

               10.3 Titles and Subtitles. The titles and subtitles used in this
Agreement are used for convenience only and are not to be considered in
construing or interpreting this Agreement.

               10.4 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

<PAGE>

made such delivery), or (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):

          If to Pledgor:

          Basa Holding Iberia, S.L.U.
          Doctor Zamenhof, 22
          28027 MADRID
          Attention: Managing Director
          Facsimile: 91 230 14 07

          With a copy to:

          Baker & McKenzie
          Paseo de la Castellana, 92
          28046 MADRID
          Attention: Maite Diez
          Facsimile: 91 391 51 49

          If to Pledgee:

          Clearwire Europe S.a.r.l.
          5808 Lake Washington Blvd. Suite 300
          Kirkland, WA 98033
          Attention: Vice President, Legal Affairs
          Facsimile: (425) 216-7900

          With a copy to:

          Davis Wright Tremaine LLP
          2600 Century Square
          1501 Fourth Avenue
          Seattle, WA 98101
          Attention: Julie Weston
          Facsimile: 206-628-7699

               10.5 Fees and Expenses. Each party shall pay its own expenses in
the negotiation and documentation of this Agreement.

               10.6 Attorneys' Fees. If any action at law or in equity
(including arbitration) is necessary to enforce or interpret the terms of any of
the Agreement, the prevailing

<PAGE>

party shall be entitled to reasonable attorney's fees, costs and necessary
disbursements in addition to any other relief to which such party may be
entitled.

               10.7 Amendments and Waivers. Any term of this Agreement may be
amended or waived only with the written consent of the Pledgor and Pledgee. Any
amendment or waiver effected in accordance with this Section 10.7 shall be
binding upon the Pledgor, Pledgee and each assignee of the Credit Agreement.

               10.8 Entire Agreement. This Agreement, and the documents referred
to herein constitute the entire agreement between the parties hereto pertaining
to the subject matter hereof, and any and all other written or oral agreements
relating to the subject matter hereof existing between the parties hereto are
expressly canceled.

     IN WITNESS WHEREOF, Pledgor has executed this Agreement the date and year
first herein written.

PLEDGOR:                                PLEDGEE:

BASA HOLDINGS IBERIA, S.L.U.            CLEARWIRE EUROPE S.A.R.L.

By:                                     By:
    ---------------------------------       ------------------------------------
Its:                                    Its:
     --------------------------------        -----------------------------------

<PAGE>

                                    EXHIBIT C

<PAGE>

                                PLEDGE AGREEMENT

     THIS PLEDGE AGREEMENT is entered into as of the_____________day
of__________, 2005, by BASA Holding Iberia, S.L.U., a private limited liability
company organized under the laws of Spain ("Pledgor"), in favor of Clearwire
Europe, S.a.r.l., a private limited liability company organized under the laws
of Luxembourg ("Pledgee").

                                    RECITALS

     Pledgor and Pledgee are parties to that certain Indemnification Agreement
dated of even date herewith (together with any related documents, as amended,
the "Indemnification Agreement"), pursuant to which Pledgor has undertaken
certain indemnities in favor of Pledgee. On the date hereof, Pledgee's parent
company, Clearwire Corporation, a Delaware corporation ("Parent"), has issued
shares of its Class A Common Stock to Pledgor pursuant to a securities purchase
agreement by and among Parent, Pledgor and Pledgee. As security for the
obligations of Pledgor under the Indemnification Agreement, Pledgor has agreed
to pledge 2,000,000 shares of Class A Common Stock of Parent (the "Shares")
owned by Pledgor as security for the payment of the obligations under the
Indemnification Agreement.

                                    AGREEMENT

     NOW, THEREFORE, the parties agree as follows:

     Section I. Pledge of Shares.

               1.1 Pledge. In consideration of the foregoing, Pledgor hereby
grants a security interest to Pledgee in all of its right, title and interest in
and to the following personal property, whether now owned or hereafter acquired
(the "Collateral"): (a) the Shares, which are represented by Certificate
Nos.______(the "Certificates"), (b) all securities and stock powers delivered by
Pledgor in substitution for any of the foregoing, all certificates and
instruments representing such securities and all cash and non-cash dividends
from time to time distributed in exchange for any or all thereof (all of which
Pledgor will immediately deliver to Pledgee to be held hereunder), and (c) all
cash and non-cash proceeds and products thereof. The Pledge made pursuant to
this Agreement is given to secure the payment in full when due, whether at
stated maturity, by acceleration or otherwise, and the prompt performance of all
obligations of Pledgor set forth in the Indemnification Agreement. The
Certificates, and all stock certificates pertaining to Collateral hereafter
acquired, shall be delivered to Pledgee, accompanied by stock powers executed in
blank. Pledgor shall not encumber or dispose of the Collateral except in
accordance with the provisions of Section 5 below.

               1.2 Release of Pledge. Pledgee shall release the Collateral
according to the following schedule:

                    (a) At such time as the Identified Liabilities (as defined
          in the Indemnification Agreement) that remain outstanding and not
          fully discharged have

<PAGE>

          been reduced to 2 million euros or less, in the aggregate, then
          Pledgee shall release to Pledgor an amount of the Collateral equal to
          (i) 1,000,000 Shares, minus (ii) any amount of Shares of the
          Collateral previously used to satisfy any indemnification obligations
          pursuant to Section l.l(b) of the Indemnification Agreement.

                    (b) Upon the second anniversary of the date of this
          Agreement, Pledgee shall release to Pledgor 500,000 Shares less such
          number of Shares (valued at the Fair Market Value (as defined in the
          Indemnification Agreement)) equal to the amount of any then
          outstanding indemnification claims under the Indemnification Agreement
          pursuant to Section 1.1 (other than pursuant to Section 1.1 (b)). Upon
          the later of the satisfaction of all outstanding claims under the
          Indemnification Agreement and the fourth anniversary of this
          Agreement, Pledgee shall return to Pledgor any remaining Collateral.

                    (c) At such time as Pledgor places into an escrow account
          for the benefit of Pledgee and on terms reasonably satisfactory to
          Pledgee, an amount of cash equal to the Fair Market Value (as defined
          in the Indemnification Agreement) of the Collateral Pledgor wishes to
          be released, Pledgee shall release such part of the Collateral. For
          purposes of this Section 1.2(c), the Fair Market Value (as defined in
          the Indemnification Agreement) of the Collateral shall be determined
          as of the date of this Agreement (i.e. $5.00 per Share).

     Section 2. Dividends. If at any time during the term of this Pledge, (a)
there is a declaration of dividends by the Parent and (b) Pledgor is in breach
of the Indemnification Agreement, Pledgee shall be and is hereby authorized, if
it should desire, to apply said dividends to the account of Pledgor in payment
of any sums then owing by Pledgor to Pledgee. Except in the foregoing
circumstance, Pledgee shall have no right to withhold or receive any dividends
paid with respect to the Shares.

     Section 3. Voting Rights. During the term of this pledge and so long as
Pledgor is not in default under the Indemnification Agreement, Pledgor shall
have the right to vote the Shares on all corporate questions.

     Section 4. Liens. Pledgor represents and warrants that there are no liens,
charges, pledges or encumbrances on the Collateral, other than those of Pledgor,
and that delivery of the Collateral pursuant to this Agreement will create a
valid first priority security interest in the Collateral and the proceeds
thereof.

     Section 5. No Sale or Encumbrance. Pledgor agrees that unless and until the
earlier of (i) the later of the satisfaction of all obligations set forth in the
indemnification Agreement and the expiration of the applicable time periods for
indemnification set forth in the Indemnification Agreement, or (ii) the release
of the Collateral hereunder, Pledgor shall not sell, assign, transfer, pledge or
otherwise encumber any of its rights in or to the Collateral unless Pledgor
places in escrow, on terms reasonably satisfactory to Pledgee, the portion of
the proceeds from such sale of Collateral equal to the Fair Market Value of the
Collateral remaining subject to this pledge at the

<PAGE>

time of the transfer. For purposes of this Section 5, the Fair Market Value of
the Collateral shall be determined as of the date of this Agreement (i.e. $5.00
per Share).

     Section 6. Further Assurances. Pledgor will, at its expense, promptly
execute, acknowledge, and deliver all such instruments and take all such action
as Pledgee may from time to time request in order to ensure the continued
existence and perfection of the security interest granted hereby. Pledgor will
defend title to the Shares against the claim of any person.

     Section 7. Stock Adjustments. In the event that, during the term of the
pledge, any stock split, reclassification, readjustment, or other change
declared or made in the capital structure of Parent, all new, substituted and
additional shares, or other securities, issued by reason of any such change (and
not as a result of a purchase by Pledgor of additional shares), shall be held by
Pledgee under the terms of this Agreement in the same manner as the Shares
originally pledged hereunder.

     Section 8. Default and Power of Sale. In the event Pledgor defaults in the
performance of any of the terms of this Agreement or the Indemnification
Agreement, or in the payment of principal or interest under the Indemnification
Agreement in accordance with its terms, then at the option of Pledgee, the whole
sum or sums remaining unpaid under the Indemnification Agreement may, after any
applicable periods for notice and cure, be declared immediately due and payable.
In addition to other rights and remedies at law or in equity available to it
upon Pledgor's default, Pledgee may transfer and register in its name or in the
name of its nominee the whole or any part of the Shares, may exchange
certificates or instruments representing or evidencing the Shares for
certificates or instruments of smaller or larger denominations, may exercise the
voting rights with respect thereto (and such right to vote shall constitute and
grant to Lender an irrevocable proxy coupled with an interest), may collect and
receive all dividends and other distributions made thereon, and may sell part or
all of the Shares in one or more sales after fourteen (14) days notice of the
time and place of any public sale or of the time after which a private sale is
to take place (which notice Pledgee agrees is commercially reasonable), and may
otherwise act as though Pledgee was the outright owner of the Shares. Pledgee
shall exercise reasonable care in preserving the Certificates representing the
Shares, but shall have no obligation to preserve the value of the Shares. At any
private or public sale of the Collateral, Pledgee shall be free to purchase all
or any part of the Collateral or to sell all or any part of the Collateral to
Parent or any other affiliate. The sale or transfer of all or any part of the
Collateral to Pledgee, Parent or any other affiliate of Pledgee shall be at Fair
Market Value for such Collateral and that the Fair Market Value shall constitute
a reasonable valuation for the Collateral.

     Section 9. Proceeds. Out of the proceeds of any public or private sale of
any or all of the Shares, Pledgee may retain an amount equal to the obligations
secured hereby, including without limitation, unpaid obligations under the
Indemnification Agreement and expenses of the sale.

     Section 10. Miscellaneous.

<PAGE>

               10.1 Transfer; Successors and Assigns. The terms and conditions
of this Agreement shall inure to the benefit of and be binding upon the
respective successors and assigns of the parties. Nothing in this Agreement,
express or implied, is intended to confer upon any party other than the parties
hereto or their respective successors and assigns any rights, remedies,
obligations, or liabilities under or by reason of this Agreement, except as
expressly provided in this Agreement.

               10.2 Governing Law. This Agreement and all acts and transactions
pursuant hereto and the rights and obligations of the parties hereto shall be
governed, construed and interpreted in accordance with the laws of the State of
Washington, without giving effect to principles of conflicts of law.

               10.3 Titles and Subtitles. The titles and subtitles used in this
Agreement are used for convenience only and are not to be considered in
construing or interpreting this Agreement.

               10.4 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), or
(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):

          If to Pledgor:

          Basa Holding Iberia, S.L.U.
          Doctor Zamenhof, 22
          28027 MADRID
          Attention: Managing Director
          Facsimile: 91 230 14 07

          With a copy to:

          Baker & McKenzie
          Paseo de la Castellana, 92
          28046 MADRID
          Attention: Maite Diez
          Facsimile: 91 391 51 49

          If to Pledgee:

          Clearwire Europe S.a.r.l.
          5808 Lake Washington Blvd. Suite 300

<PAGE>

          Kirkland, WA 98033
          Attention: Vice President, Legal Affairs
          Facsimile: (425) 216-7900

          With a copy to:

          Davis Wright Tremaine LLP
          2600 Century Square
          1501 Fourth Avenue
          Seattle, WA 98101
          Attention: Julie Weston
          Facsimile: 206-628-7699

               10.5 Fees and Expenses. Each party shall pay its own expenses in
the negotiation and documentation of this Agreement.

               10.6 Attorneys' Fees. If any action at law or in equity
(including arbitration) is necessary to enforce or interpret the terms of any of
the Agreement, the prevailing party shall be entitled to reasonable attorney's
fees, costs and necessary disbursements in addition to any other relief to which
such party may be entitled.

               10.7 Amendments and Waivers. Any term of this Agreement may be
amended or waived only with the written consent of the Pledgor and Pledgee. Any
amendment or waiver effected in accordance with this Section 10.7 shall be
binding upon the Pledgor, Pledgee and each assignee of the Indemnification
Agreement.

               10.8 Entire Agreement. This Agreement, and the documents referred
to herein constitute the entire agreement between the parties hereto pertaining
to the subject matter hereof, and any and all other written or oral agreements
relating to the subject matter hereof existing between the parties hereto are
expressly canceled.

     IN WITNESS WHEREOF, Pledgor has executed this Agreement the date and year
first herein written.

PLEDGOR:                                PLEDGEE:

BASA HOLDINGS IBERIA, S.L.U.            CLEARWIRE EUROPE S.A.R.L.

By:                                     By:
    ---------------------------------       ------------------------------------
Its:                                    Its:
     --------------------------------        -----------------------------------

<PAGE>

                                   EXHIBIT D

<PAGE>

                                (CLEARWIRE LOGO)

[____________], 2005

Mr. Alejandro Rivas Micoud
BASA Holding Iberia, S.L.U.
Doctor Zamenhof, 22
28027 MADRID
Spain

Dear Mr. Rivas-Micoud,

BASA Holding Iberia, S.L.U. ("BHI"). Clearwire Corporation ("Parent") and
Clearwire Europe, S.A.R.L. ("Clearwire") entered into a Securities Purchase
Agreement on [___________________, 2005] (the "Purchase Agreement") pursuant to
which Parent has issued shares of its capital stock to BHI. Simultaneously with
the execution of this letter agreement and pursuant to the terms of the Purchase
Agreement, Parent and BHI have executed a joinder to that certain Amended and
Restated Stockholders Agreement by and among Parent and its stockholders dated
March 16, 2004 (the "Stockholders Agreement"). Capitalized terms not otherwise
defined herein shall have the meaning set forth in the Stockholders Agreement.

This letter confirms our understanding and agreement that:

     1. Parent will provide BHI with the same rights as Parent provides to an
Eligible Stockholder under the Stockholders Agreement at such times as BHI owns
at least 0.5% of the outstanding capital stock of the Company; provided,
however, the rights granted to BHI under this paragraph 1 shall terminate upon
the termination of the Stockholders Agreement.

     2. Parent will consent to the assignment by BHI of its rights under Section
1 of the Stockholders Agreement and paragraph 1 and paragraph 2 of this letter
agreement (the "BHI Preemptive Rights") to one Designee (as defined in the
Stockholders Agreement) (the "BHI Designee"). Once BHI has assigned its BHI
Preemptive Rights to a BHI Designee, only the BHI Designee shall be entitled to
exercise the BHI Preemptive Rights, and the BHI Preemptive Rights may not be
further assigned by the BHI Designee to any Person. Further, until BHI
designates a BHI Designee in writing, Parent shall only be obligated to deliver
Issue Notices to BHI. Upon the first Transfer by BHI of any of its Shares to any
Person, the transferee of such Shares shall automatically be designated as the
BHI Designee; provided, that such Transfer is permitted under the Stockholders
Agreement.

     3. With respect to BHI only, Parent agrees to consent to any of the
following Transfers, and, thus, cause such Transfers to be treated as Permitted
Transfers under the Stockholders Agreement:

          (a) Any Transfer by BHI of all, but not less than all, of its Shares
     to an Affiliate of BHI; provided, that such Affiliate qualifies as a
     Qualified Transferee;

          (b) Any Transfer by BHI of all, but not less than all, of its Shares
     to one

                                       1

<PAGE>

     Person in anticipation of or as a consequence of the dissolution or
     liquidation of BHI; provided, that such transferee qualifies as a Qualified
     Transferee; and

          (c) The Change of Control of BHI; provided, that the Person gaining
     Control over BHI qualifies as a Qualified Transferee; provided, further,
     that such Change of Control transaction was entered into for legitimate
     business purposes and not to avoid the transfer restrictions contained in
     the Stockholders Agreement or this letter agreement.

     4. Any filing of a petition in "concurso de acreedores" or any general
assignment for the benefit or creditors, or the dissolution or commencement of
liquidation of BHI ("Event"), shall not be treated by Parent as a Repurchase
Event under Section 7.01(a) or Section 7.0l(b) of the Stockholders Agreement;
provided, that such Event does not result in a Transfer of BHI's Shares that is
not permitted under the Stockholders Agreement or this letter agreement.

     5. Except as otherwise expressly provided herein, BHI's rights and
obligations under this Agreement may not be assigned without the prior written
consent of Parent, which may be withheld in Parent's sole discretion.

     6. This letter agreement shall be governed under the laws of the State of
Delaware, without reference to any rules governing conflicts of laws. Any
disputes arising under this letter agreement shall be resolved in the manner set
forth in Section 13.05 of the Stockholders Agreement.

     Please indicate your agreement with this side letter by signing in the
space provided below and return an original of this letter to Clearwire at the
address set forth above.

                                        CLEARWIRE CORPORATION

                                        By:
                                            ------------------------------------
                                            Benjamin G. Wolff, Executive Vice
                                            President

Agreed.

BASA HOLDING IBERIA, S.L.U.

By:
    ---------------------------------
    Alejandro Rivas-Micoud, its
    Managing Director

                                       2

<PAGE>

                                   EXHIBIT E

<PAGE>

                        JOINDER IN STOCKHOLDERS AGREEMENT

     This Joinder in Stockholders Agreement ("Joinder") is made and entered into
this ____ day of ____________, 2005, by and between Clearwire Corporation, a
Delaware corporation (the "Company"), and the party whose signature appears
below (the "Joining Party").

                                    RECITALS:

WHEREAS, the Joining Party has acquired or intends to acquire shares of capital
stock of the Company; and

WHEREAS, pursuant to Section 13.09 of that certain Amended and Restated
Stockholders Agreement, between the Company and its stockholders, dated as of
March 16, 2004 (the "Stockholders Agreement"), the Joining Party may become a
party to the Stockholders Agreement by execution of an instrument such as this
Joinder.

NOW, THEREFORE, the Joining Party agrees as follows:

1.   JOINDER

     By execution of this Joinder by the Joining Party and acceptance hereof by
the Company, the Joining Party is and agrees to become a party to, subject to
all the conditions, restrictions, obligations and duties of a Stockholder of the
Company under the Stockholders Agreement, including the restrictions on transfer
of the shares acquired from the Company and the requirement that the Joining
Party vote its shares in accordance with the terms thereof.

2.   AGREEMENT TO BE BOUND BY AGREEMENT

     This Joinder shall in all respects, including all matters of construction,
validity and performance, be governed by, and construed and enforced in
accordance with, the laws of the State of Delaware, without reference to any
rules governing conflicts of laws.

3.   COUNTERPARTS

     This Joinder may be executed in any number of counterparts, each of which
shall be an original, but all of which together shall constitute one instrument.

COMPANY:                                JOINING PARTY:

By:                                     By:
    ---------------------------------       ------------------------------------
Name:                                   Name:
      -------------------------------         ----------------------------------
Title:                                  Title:
       ------------------------------          ---------------------------------
Date:                                   Date:
      -------------------------------         ----------------------------------

                                       1

<PAGE>

                                    EXHIBIT F

<PAGE>

                                     JOINDER

     In consideration of the permitted issuance, sale, pledge, or other transfer
to the undersigned of Registrable Securities in the Company, the undersigned
hereby consents and agrees to become a party to and be bound by the Registration
Rights Agreement dated as of the 16th day of March, 2004, as amended, receipt of
a copy of which is hereby acknowledged, as fully as if the undersigned were one
of its original parties, and all of the Registrable Securities owned by the
undersigned will be held in accordance with and restricted by the terms of such
Registration Rights Agreement.

     Dated:
            -------------------------

                   Name of Stockholder:
                                        ----------------------------------------

                   Sign Name:
                                        ----------------------------------------
                   Print Name:
                                        ----------------------------------------
                   Address:
                                        ----------------------------------------

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

                                        ----------------------------------------
                   SSN/EIN:
                                        ----------------------------------------

     Approved by the Company:

                     COMPANY:           CLEAR WIRE CORPORATION

                                        By:
                                            ------------------------------------
                                        Name:
                                              ----------------------------------
                                        Title:
                                               ---------------------------------
                                        Dated:
                                               ---------------------------------

                                       1<PAGE>
                                                                   EXHIBIT 10.66

                                                                  EXECUTION COPY

                                BANDA ANCHA S.A.
                              INVESTMENT AGREEMENT

     This Investment Agreement (this "Agreement") is made as of the 7th day of
December, 2005.

     BY AND BETWEEN

     Banda Ancha S.A., a company incorporated under the laws of Spain (the
"Company");

     BASA Holding Iberia, S.L.U., a company incorporated under the laws of Spain
("BHI");

     Clearwire Europe S.a.r.l., a limited liability company organized under the
laws of Luxembourg (the "Clearwire").

     The Company, BHI, and Clearwire shall be jointly referred to as the
"Parties" and each of them, individually, as a "Party".

                                    RECITALS

     WHEREAS, as of the date of this Agreement, the Company has a share capital
of 4,563,862 Euros, divided in 4,563,862 shares, with a par value of E1.00 each,
all of the same class and series, totally subscribed and paid up and free from
any lien, pledge, usufruct, charge, security interest, right of first refusal,
option or right of others therein, or encumbrance of any nature whatsoever
("Liens") except as provided for in the corporate By-laws.

     WHEREAS, as of the date hereof, BHI is the legal owner of 100% of the
outstanding shares of BASA.

     WHEREAS, the Company requires additional capital contributions to enable it
to continue its development from the date of this Agreement onwards.

     WHEREAS, concurrently with the execution of this Agreement, BHI, Clearwire
Corporation and Clearwire are entering into a Securities Purchase Agreement (the
"Securities Purchase Agreement"), pursuant to which Clearwire will purchase all
of BHI's shares of the Company upon fulfillment of certain conditions.

     WHEREAS, Clearwire is willing to supply such financial support through the
subscription of shares of the Company, in exchange of 51% of the voting interest
in the Company.

     WHEREAS, concurrently with the subscription of the shares, Clearwire is
willing to make a credit facility available to BHI secured by a pledge of a
portion of BHI's shares in the Company.

<PAGE>

     NOW, THEREFORE, in consideration of the premises and the mutual
representations, warranties, covenants, conditions and agreements hereinafter
set forth, the Parties agree to enter into this Agreement pursuant to the
following:

                              ARTICLE 1. INVESTMENT

     SECTION 1.1 INVESTMENT. Subject to the terms and conditions of this
Agreement, Clearwire agrees to contribute, and BHI and the Company agree to
accept the contribution by Clearwire of E4,750,143 to the Company in exchange
for 4,750,143 shares of the common stock of the Company, par value E1.00 per
share, representing 51% of the share capital of the common stock of the Company
("Purchased Shares"), at a price per share of E1.00 (the "Investment"). The
Investment shall be made in the manner set forth in this Article 1.

     SECTION 1.2 CLOSING. The closing of the Investment shall take place at the
offices of Gomez Acebo & Pombo, Madrid, at 10:00a.m. (Spanish time)
concurrently with the execution of this Agreement, or at such other time and
place as the Parties shall agree, either orally or in writing (which time and
place are designated as the "Closing").

     SECTION 1.3 ACTIONS TO BE CARRIED OUT AT THE CLOSING.

          (a) At the Closing, a Universal General Shareholders Meeting of the
Company will be held with the attendance of BHI, as owner of 100% of the issued
share capital, whereby BHI, as sole shareholder of the Company, will approve a
capital increase for the amount of the Investment by way of the issuance of
4,750,143 Purchased Shares, for an amount of E1.00 per share, pursuant to
resolutions reasonably acceptable to Purchaser's counsel.

          (b) In the General Shareholders Meeting to be held at the Closing, BHI
will waive its pre-emptive rights and the Purchased Shares will totally be
subscribed by Clearwire, who will fully pay them in by paying the Purchase
Price.

          (c) BHI and Clearwire will enter in a credit facility agreement (the
"Credit Agreement") recorded in a public deed granted before a Notary Public.
Pursuant to the Credit Agreement, BHI and Clearwire will enter into an
agreement, recorded in a public deed granted before a Notary Public pursuant to
which BHI will grant a pledge over 1,200,000 shares of the Company, in favor of
Clearwire (the "Pledge Agreement").

          (d) BHI, the Company and Clearwire will enter into a shareholders
agreement (the "Shareholders Agreement").

          (e) BHI, Clearwire and Clearwire Corporation will enter into an
indemnification agreement (the "Indemnification Agreement") before the Notary
and which will be granted in a Public Deed.

          (f) Once all the former actions have been carried, a General
Shareholders Meeting of the Company will be held with the attendance of BHI and
Clearwire, as owners of

                                        2

<PAGE>

100% of the issued share capital, whereby BHI and Clearwire will unanimously
resolve to (i) amend and restate the Company's By-laws; and (ii) accept the
resignation or either dismiss all of the current members of the Board of
Directors of the Company (the "Board") and appoint new members, pursuant to the
Shareholders Agreement.

          (g) The new members of the Board of Directors will hold a meeting of
the Board of Directors whereby the positions within said Board will be
distributed pursuant to the Shareholders Agreement. The Board will appoint the
Managing Director, revoke any current powers of attorney and grant new powers of
attorney, all in its discretion.

          (h) The new secretary of the Board of Directors will certify all the
above resolutions with the approval of the new President and the signature of
the former Secretary of the Board of Directors and a public deed will be granted
before a Spanish Notary Public pursuant to which said amendments of the
corporate By-laws, the execution of the share capital increase, totally
subscribed and paid in, and the appointment of the new members of the Board of
Directors and the distributions of posts amongst them, are publicly recorded.

          (i) The Company will deliver to BHI Certificates representing the
shares of common stock of the Company held by BHI. All such certificates shall
bear the legends set forth in the Shareholders Agreement.

          (j) From the proceeds of the Purchase Price, the Company shall pay all
intercompany obligations owed by the Company, on one hand, to BHI, RSL or any of
their respective Affiliates, on the other hand, arising after June 1, 2005 and
any costs and expenses incurred as a consequence of the Madrid launching,
whether incurred before or after June 1, 2005, all such in an aggregate amount
not to exceed E2,251,299.03, but specifically excluding the Permitted
Intercompany Debt (as defined in the Securities Purchase Agreement) (the
"Repayable Intercompany Debt").

          (k) BHI will deliver to Clearwire the public deeds and statutory books
(libros sociales) and other corporate documents of the Company, including,
without limitation, the Deed of incorporation, the By-laws, all the Deeds
modifying the By-laws, any other public deed granted during the corporate life,
the Books of Minutes of the General Shareholders Meetings and of the Board of
Directors, Registry Book of Shareholders, each legalized and up to date.

                   ARTICLE 2. REPRESENTATIONS AND WARRANTIES.

     SECTION 2.1 REPRESENTATIONS AND WARRANTIES OF BHI AND THE COMPANY. BHI and
the Company specifically declare to Clearwire that the representations and
warranties in this Section 2.1 are true, complete and accurate. Each of such
representations and warranties is separate and independent and, except as
expressly provided to the contrary in the Securities Purchase Agreement or this
Agreement, is not limited by reference to any other paragraph of this Section
2.1 or by anything in the Securities Purchase Agreement or this Agreement. BHI
and the Company acknowledge that such representations and warranties are
essential elements for Clearwire to enter into this Agreement and for Clearwire
to bind itself to make the Investment.

                                       3

<PAGE>

          (a) INCORPORATED REPRESENTATIONS AND WARRANTIES. The representations
and warranties contained in the Securities Purchase Agreement, including but not
limited to Schedule A attached thereto, and the Disclosure Schedule, are
incorporated herein by reference and are true, complete and accurate.

          (b) AMENDMENT OF INTERCOMPANY DEBT. BHI declares to Clearwire that,
except for the Repayable Intercompany Debt and the Permitted Intercompany Debt,
all existing intercompany obligations between the Company, on one hand, and BHI,
RSL or any of their respective Affiliates, on the other hand, have been
transferred to BHI. BHI hereby agrees that all such intercompany obligations
shall not be subject to repayment and instead shall be converted into shares of
the Company's common stock immediately prior to the closing of the transactions
contemplated by the Securities Purchase Agreement. BHI further agrees that, if
the Securities Purchase Agreement is terminated by its terms or if the
transactions contemplated thereby have not been consummated within one (1) year
from the date hereof, all such intercompany obligations shall remain outstanding
until there is a capital increase of common stock by the Company which triggers
preemptive rights in favor of BHI, at which time such intercompany obligations
shall be used by BHI to exercise such rights, and any remaining amount of such
intercompany obligations shall be used in the same manner in successive sales of
common stock by the Company until such time as all of such intercompany
obligations shall have been converted into common stock of the Company.

          (c) EXISTING INTERCOMPANY AGREEMENTS. Except for the Continuing
Intercompany Agreements (as amended in accordance with Section 3.3) and except
as otherwise provided with respect to Third Party Services Contracts in Section
3.4, all existing agreements or arrangements, whether written or oral, between
the Company on one hand, and BHI, RSL or any of their respective Affiliates, on
the other hand, have been terminated and are no longer in effect. The Company
has no further obligations or liabilities with respect to such agreement.

          (d) AUTHORIZATION. All corporate action on the part of BHI and the
Company, their respective officers, directors and stockholders necessary for the
authorization, execution and delivery of this Agreement and the agreements
contemplated to be delivered at Closing as set forth in Section 1.3, the
performance of all obligations of BHI and the Company hereunder and thereunder
at the Closing and the authorization, issuance and delivery of the Purchased
Shares as set forth in this Agreement when executed and delivered, will
constitute valid and legally binding obligations of BHI and the Company,
enforceable in accordance with their respective terms except (i) as limited by
applicable bankruptcy, insolvency, reorganization, moratorium, and other laws of
general application affecting enforcement of creditors' rights generally
vis-a-vis the Company and not BHI, RSL or any of its Affiliates, and (ii) as
limited by laws relating to the availability of specific performance, injunctive
relief, or other equitable remedies.

          (e) VALID ISSUANCE OF SHARES. The Purchased Shares that are being
subscribed by Clearwire hereunder, when issued, and delivered in accordance with
the terms of this Agreement for the consideration expressed herein, will be duly
and validly issued, fully paid, and nonassessable, and will be free of Liens,
mortgages and restrictions on transfer other than restrictions on transfer under
this Agreement and the Shareholders Agreement and under applicable securities
laws.

                                       4

<PAGE>

     SECTION 2.2 REPRESENTATIONS AND WARRANTIES OF CLEARWIRE. Clearwire declares
to the Company and BHI that the representations and warranties by Clearwire
contained in the Securities Purchase Agreement are incorporated herein by
reference and are true, accurate and complete. Each of such representations and
warranties is separate and independent and, except as expressly provided to the
contrary in the Securities Purchase Agreement, is not limited by reference to
anything in the Securities Purchase Agreement or this Agreement. Clearwire
acknowledges that these representations and warranties are essential elements
for the Company and BHI to enter into this Agreement.

                              ARTICLE 3. COVENANTS

     SECTION 3.1 CONFIDENTIALITY. Pursuant to this Agreement and the performance
thereof, each Party may receive Confidential Information. No Party shall use for
itself, except in performance of the Agreement, or disclose to any Person this
Agreement or any Confidential Information, except (a) information that was
gained independent of such Party's relationship with the other Party and became
publicly available through no breach of any obligation of confidentiality by
such Party; (b) information that is communicated to a third party with the prior
written consent of such Party; or (c) information that is required to be
disclosed pursuant to the lawful order of a government agency or disclosure that
is required by operation of law, but in such event, only to the extent such
disclosure is required and, to the extent reasonably practicable, prior written
notice must be given to allow the disclosing Party to seek a protective order or
other appropriate remedy. In the event of a beach or threatened breach of the
terms of this section, the disclosing Party shall be entitled to seek an
injunction prohibiting any such breach. Any such injunctive relief shall be in
addition to, and not in lieu of, any appropriate relief in the way of money
damages or any other remedies available at law or in equity. BHI acknowledges
and agrees that the terms of this Agreement may be required to be separately
stated in the consolidated financial statements of Clearwire and/or its
Affiliates and that the disclosure by Clearwire or its Affiliates of such
financial statements shall not be a breach of this Agreement. Notwithstanding
the foregoing, either party may disclose this Agreement to its affiliates,
strategic partners, actual or potential investors, lenders, acquirers, merger
partners; and others whom such party deems in good faith to have a need to know
such information for purposes of pursuing a transaction or business relationship
with such party; provided that such party has an enforceable non-disclosure or
confidentiality agreement in place with such Person that will provide at least
the same amount of protection as this Section 3.1.

     SECTION 3.2 NONCOMPETITION; NONSOLICITATION.

          (a) From the Closing Date and until the earlier of (i) the entry into
force of the non-competition and non-solicitation provisions of Section 4.8 of
the Securities Purchase Agreement, or (ii) for so long as BHI has a
representative on the Board of the Company or holds at least 15% of the share
capital of the Company, BHI, on behalf of itself and its Affiliates, covenants
that neither BHI nor any of its Affiliates shall engage in, or retain,
participate in or have any interest, directly or indirectly, in any Person
(whether as an investor, agent, employee, creditor or in any other capacity
which calls for the rendering of services, advice, acts of management, operation
or control) that engages in any broadband wireless access activities in Spain,
excluding (i) the resale of the Company's products and services pursuant to
agreements between BHI, or its Affiliates, and the Company approved by Clearwire
in its sole discretion, or

                                       5

<PAGE>

(ii) the continuation by BHI, RSL and ALO of their respective non-wireless/fixed
telecommunication services business activities existing as of the date of this
Agreement.

          (b) From the Closing Date and until the earlier of (i) the entry into
force of the non-competition and non-solicitation provisions of Section 4.8 of
the Securities Purchase Agreement, or (ii) for so long as BHI has a
representative on the Board of the Company or holds at least 15% of the share
capital of the Company, BHI, on behalf of itself and its Affiliates, covenants
that neither BHI nor any of its Affdiates shall, directly or indirectly, (i)
employ or engage, recruit or solicit for employment any person who is or becomes
employed by the Company, or otherwise seek to influence or alter any such
person's relationship with the Company, or (ii) solicit or encourage any present
or future subscriber or customer of the Company to terminate or otherwise alter
his, her or its relationship with the Company (other than general solicitation
by BHI, RSL and ALO of its activities permitted pursuant to Section 3.2(a)(ii)).

          (c) The Parties agree that the covenants contained in this Section
3.2, both as to time and area covered, are necessary to protect the Company and
Clearwire's investment in the Company and are deemed by the parties to be an
integral and important part of this Agreement. The Parties acknowledge and agree
that in the event of a breach of such covenants, Clearwire would not have an
adequate remedy at law, and Clearwire shall be entitled to injunctive relief in
addition to any other remedies which may be available to it under this
Agreement, at law or in equity. If any court of competent jurisdiction shall at
any time deem any of the covenants in this Section 3.2 too lengthy or the area
covered too extensive, the other provisions of this Section 3.2 shall
nevertheless stand, the term shall be deemed to be the longest period
permissible by law under the circumstances and the area covered shall be deemed
to comprise the largest territory permissible by law under the circumstances.
The court in each case shall reduce the time period and/or area covered to
permissible duration or size.

     SECTION 3.3 TRANSITION SERVICES. The Continuing Intercompany Agreements
shall be amended as follows:

          (a) For purposes of this Agreement, "Continuing Intercompany
Agreements" shall mean the following agreements: (i) Administrative Services
Agreement between the Company and RSL dated December 18, 2002; (ii) Agreement
for the Provision of Circuits between the Company and RSL dated December 31,
2002; and (iii) Agreement for the Provision of Data Services dated December 18,
2002 between the Company and ALO.

          (b) Any services delivered pursuant to the Continuing Intercompany
Agreements shall be invoiced to the Company at the RSL Group's actual cost, or
to the RSL Group at the Company's actual cost, as applicable, including salary
or wages of individuals providing such services, and shall be paid within
fifteen (15) days as of the date of the invoice.

          (c) Except as provided in Section 3.4 with respect to third party
services, the RSL Group shall continue providing the services to the Company,
and the Company shall continue providing services to the RSL Group, as
applicable, pursuant to each Continuing Intercompany Agreement until the earlier
of (i) such time as the applicable parties enter into new agreements with
Clearwire's prior written approval; (ii) such time as the parties thereto
mutually

                                       6

<PAGE>

agree to terminate such Continuing Intercompany Agreement; (iii) Clearwire or
the Company providing fifteen (15) days written notice of termination of such
Continuing Intercompany Agreement to the applicable member of the RSL Group; or
(iv) the applicable member of the RSL Group providing fifteen (15) days written
notice of termination of such Continuing Intercompany Agreement to the Company;
provided, however, that such notice to the Company cannot be given before a term
of two (2) months after the Closing has elapsed.

     SECTION 3.4 THIRD PARTY CONTRACTS.

          (a) The Parties shall make reasonable efforts to have the following
third party services contracted by the RSL Group and provided to the Company
assigned by the RSL Group to the Company following the Closing only if such
contracts are currently being used by the Company and are not in default by any
party thereto (the "Third Party Service Contracts"):

     (i)  Sites leased by RSL:

          -    Agreement with Josel, S.A. for site in Paseo Zona Franca 131-139,
               Barcelona;

          -    Agreement with Comunidad Propietarios Plaza Castilla for site in
               Plaza Castilla 3, Madrid (will be assigned notwithstanding the
               payment default, which shall be covered under the Indemnification
               Agreement);

          -    Agreement with Inmobiliaria Mola for site in Principe Vergara,
               112, Madrid.

     (ii) Circuits contracted by RSL:

          -    Ufinet       1 * E1

          -    Euskaltel    1 * E1

          -    Uni2         7*E1 + 3*E3

          -    Retevision   16 * El

          -    Telefonica   2 * E1 + 4 Ads1

          -    Cogent       5 * E1

          -    T-System     IP connectivity 25 Mb/s

     (iii) Company Office Space contracted by RSL:

          -    Modules A and B of the fifth floor of Doctor Zamenhof 22, Madrid,
               as well as 33 parking spaces in the same building pursuant to a
               lease agreement entered into between RSL and 22 Zamenhof, S.L."
               dated February 2, 2000;

          -    Technical space at ground floor at Principe de Vergara 112,
               Madrid pursuant to a lease agreement between RSL and Inmobiliaria
               Mola; and

          -    Technical space at second floor at Principe de Vergara 112,
               Madrid pursuant to a lease agreement between RSL and Inmobiliaria
               Mola, which agreement will expire on December 31, 2005 and will
               not be renewed.

                                       7

<PAGE>

          If the Company determines not to accept assignment of any of the Third
Party Service Contracts that are not in default by any party thereto, then the
Company shall provide notice of such decision to the relevant RSL Group company
in sufficient time to allow such relevant RSL Group company to terminate the
applicable Third Party Service Contract without any early termination costs or
penalties. In the event that the Company does not provide sufficient notice, it
shall compensate and hold the relevant RSL Group company harmless from the
lesser of (i) any costs, expenses and penalties imposed on the relevant RSL
Group company by the third party as a result of the early termination of such
Third Party Service Contract, or (ii) any payments due or to become due for the
period until termination.

          (b) In the event that the assignment of any Third Party Service
Contract by the RSL Group is not possible and the Company is interested in the
continuance of such services, the Company and the relevant RSL Group company
shall negotiate in good faith a term in which the RSL Group will continue
providing such services, which term shall be a reasonable term to allow the
Company to find an alternative supplier of such services.

          (c) With respect to the agreement for the repayment of debt entered
into between the Company and 22 Zamenhof, S.L. dated June 9, 2003 as amended on
July 7, 2004, where repayment of the Company's debt is made through the
provision of services by the RSL Group, the Company will either (i) negotiate
with 22 Zamenhof, S.L. the repayment of the debt in a way other than the
provision of services by the RSL Group or (ii) reimburse the relevant RSL Group
companies for the provision of the services rendered under the mentioned
agreement at cost.

     SECTION 3.5 BHI'S LIABILITY AND INDEMNIFICATION OBLIGATIONS. The liability
and indemnification obligations of BHI pursuant to this Agreement are as set
forth in the Indemnification Agreement.

                            ARTICLE 4. MISCELLANEOUS

     SECTION 4.1 CERTAIN DEFINITIONS.

     "Affiliate" means for any Person, a Person controlling, controlled by or
under common control with, such Person.

     "Confidential Information" means any and all information regarding the
business, finances, operations, products, services and customers of the
disclosing Party and its Affiliates, in written or oral form or in any other
medium.

     "Person" means an individual, a partnership, a corporation, a limited
liability company, an association, a joint shares company, a trust, a joint
venture, an unincorporated organization, or a government agency or authority.

     SECTION 4.2 ENTIRE AGREEMENT. This Agreement and the documents and other
agreements referred to herein constitute the entire agreement among the parties
and no party shall be liable or bound to any other party in any manner by any
warranties, representations, or covenants except as specifically set forth
herein or therein.

                                       8

<PAGE>

     SECTION 4.3 SURVIVAL. The warranties, representations, and covenants of the
Parties contained in or made pursuant to this Agreement shall survive the
execution and delivery of this Agreement and the closing of the transactions
contemplated hereby.

     SECTION 4.4 SUCCESSORS AND ASSIGNS. Except as otherwise provided herein,
the terms and conditions of this Agreement shall inure to the benefit of and be
binding upon the respective successors and assigns of the parties. Nothing in
this Agreement, express or implied, is intended to confer upon any party other
than the parties hereto or their respective successors and assigns any rights,
remedies, obligations, or liabilities under or by reason of this Agreement,
except as expressly provided in this Agreement.

     SECTION 4.5 GOVERNING LAW. This Agreement shall be governed by, and
construed in accordance with, the internal laws of the Kingdom of Spain, without
reference to the choice of law principles thereof.

     SECTION 4.6 ARBITRATION. All disputes arising out of or in connection with
the present contract shall be submitted to binding arbitration pursuant to the
provisions of this Section and under the Rules of Conciliation and Arbitration
of the International Chamber of Commerce (the "ICC"). The arbitration shall be
conducted in London, England or another mutually agreeable neutral location. The
arbitration shall be conducted in English. The arbitration shall be conducted
before a panel of three arbitrators, comprised of one arbitrator appointed by
each party to the dispute and one neutral arbitrator appointed in accordance
with the Rules of Conciliation and Arbitration of the ICC.

     SECTION 4.7 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. All filing fees required to be paid to any governmental authority
in connection with satisfying the conditions set forth in this Agreement will be
borne by the Company.

     SECTION 4.8 TITLES AND SUBTITLES. The titles and subtitles used in this
Agreement are used for convenience only and are not to be considered in
construing or interpreting this Agreement.

     SECTION 4.9 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), or (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):

                                       9

<PAGE>

          If to BHI:

          Basa Holding Iberica, S.L.U
          Doctor Zamenhof, 22
          28027 Madrid
          Attention: Managing Director
          Facsimile: 91 230 14 07

          With a copy to:

          Baker & McKenzie
          Paseo de la Castellana 92
          28046 Madrid
          Attention: Maite Diez
          Facsimile: 91 391 51 49

          If to the Company:

          Banda Ancha, S.A.
          Doctor Zamenhof, 22
          28027 Madrid
          Attention: Managing Director
          Facsimile: 91 230 14 00

          If to Clearwire:

          Clearwire Europe S.a.r.l.
          5808 Lake Washington Blvd. Suite 300
          Kirkland, WA 98033
          Attention: Vice President, Legal Affairs
          Facsimile: (425) 216-7900

          With a copy to:

          Davis Wright Tremaine LLP
          2600 Century Square
          1501 Fourth Avenue
          Seattle, WA 98101
          Attention: Julie Weston
          Facsimile: 206-628-7699

     SECTION 4.10 FINDER'S FEES. Each party represents that it neither is nor
will be obligated for any finder's fee or commission in connection with this
transaction and agrees that it shall indemnify and hold harmless the other party
from any liability for any commission or compensation in the nature of a
finder's fee (and the cost and expenses of defending against such

                                       10

<PAGE>

liability or asserted liability) for which such party or any of its officers,
partners, employees, or representatives is responsible.

     SECTION 4.11 ATTORNEYS' FEES. If any action at law or in equity is
necessary to enforce or interpret the terms of this Agreement or the Articles of
the Company, the prevailing party shall be entitled to reasonable attorneys'
fees, costs, and disbursements in addition to any other relief to which such
party may be entitled.

     SECTION 4.12 AMENDMENTS AND WAIVERS. Any term of this Agreement may be
amended and the observance of any term of this Agreement may be waived (either
generally or in a particular instance and either retroactively or
prospectively), only with the written consent of the Parties.

     SECTION 4.13 SEVERABILITY. If one or more provisions of this Agreement are
held to be unenforceable under applicable law, such provision shall be excluded
from this Agreement and the balance of the Agreement shall be interpreted as if
such provision was so excluded and shall be enforceable in accordance with its
terms.

     SECTION 4.14 COUNTERPARTS. This Agreement may be executed in two or more
counterparts, each of which shall be deemed an original, but all of which
together shall constitute one and the same instrument.

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

BHI:                                    COMPANY:

BASA HOLDINGS IBERIA, S.L.U.            BANDA ANCHA, S.A.

/s/ Alejandro Rivas-Micoud              /s/ Alejandro Rivas-Micoud
-------------------------------------   ----------------------------------------
By: Alejandro Rivas-Micoud              By: Alejandro Rivas-Micoud
Title: Managing Director and Special    Title: Managing Director and Special
       PoA                                     PoA

                                        CLEARWIRE:

                                        CLEARWIRE EUROPE S.A.R.L.

                                        By: /s/ Nicolas Kauser
                                            ------------------------------------
                                        Title: Nicolas Kauser, Manager

                                       11

<PAGE>

     ALO COMUNICACIONES ESPANA, S.L. gives its consent for the purposes of that
covered by Article 3 in as far as they regard rights and obligations of such
company and agrees to be bound thereby. Likewise, ALO COMUNICACIONES ESPANA
S.L. appoints BHI as their representative for all notification purposes with the
details quoted in Section 4.9

ALO COMUNICACIONES ESPANA, S.L.

By: /s/ Alejandro Rivas-Micoud
    ---------------------------------
Name: Alejandro Rivas-Micoud
Title: Managing Director and Special
       PoA

                                       12

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