Exhibit 10.1

SECOND AMENDMENT TO NOTE PURCHASE AGREEMENT

This Second Amendment (this “Amendment”) to the Note Purchase Agreement (defined
below) is made as of February 26, 2013 by and among: Clearwire Corporation, a
Delaware corporation (the “Parent”); Clearwire Communications LLC, a Delaware
limited liability company (the “Company”); Clearwire Finance, Inc., a Delaware
corporation (“Finance Co” and, together with the Company, the “Issuers”); and
Sprint Nextel Corporation, a Kansas corporation (the “Purchaser”, and together
with the Parent and the Issuers are collectively referred to as the “Parties”).

RECITALS

WHEREAS, the Parties entered into that certain Note Purchase Agreement, dated as
of December 17, 2012, as amended by that certain First Amendment to Note
Purchase Agreement, dated as of January 31, 2013 (as amended through the date
hereof, the “Note Purchase Agreement”).

NOW, THEREFORE, in consideration of the foregoing and for other valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, the
Parties hereby agree as follows:

1.    AMENDMENTS / ACKNOWLEDGMENT

1.1    Amendments to the Note Purchase Agreement. The Note Purchase Agreement is
hereby amended as follows:

(a)
the definitions of "Agreement Condition" and "Build-Out Agreement" are hereby
deleted from Section 1.01 of the Note Purchase Agreement;

(b)
Section 2.01 of the Note Purchase Agreement is hereby amended and restated in
its entirety to read as follows:

"Agreement to Purchase. Purchaser hereby agrees, subject to the conditions
hereinafter stated, to purchase from the Issuers on the applicable Draw Date set
forth in Annex A hereto, at a purchase price equal to 100% of the aggregate
principal amount thereof, an aggregate principal amount of Notes equal to:

(a)
the Available Funding Amount; plus

(b)    to the extent the Available Funding Amount in respect of a previous Draw
Date shall have been decreased as a result of an Exchange Security Cut-Back, an
aggregate principal amount of Notes equal to the amount of such Exchange
Security Cut-Back (but only if the Exchange Securities issuable upon exchange of
such Notes shall have been duly authorized and reserved as of such DrawDate).";
(c)    Section 5.02(e) of the Note Purchase Agreement is hereby deleted in its
entirety, and the reference to such Section in Section 5.02(f) of the Note
Purchase Agreement is hereby deleted in its entirety;
(d)    the last sentence of Section 7.04 of the Note Purchase Agreement is
hereby deleted in its entirety; and
(e)    Section 8.01(c) of the Note Purchase Agreement is hereby amended and
restated in its entirety to read as follows:

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Exhibit 10.1

"automatically, without any further action by the Parent, the Issuers or the
Purchaser, if the Merger Agreement is terminated pursuant to its terms;
provided, that, if the Merger Agreement is terminated pursuant to Section
6.1(c)(iii) or Section 6.1(d) thereof, this Agreement shall not be automatically
terminated, but instead shall terminate pursuant to this Section 8.01(c) upon
the election by the Issuers to exchange any Notes for Exchange Securities
pursuant to the terms of the Indenture;".

1.2    Acknowledgment. The Parties hereby acknowledge and agree that the Issuers
failed to satisfy the conditions set forth in Section 5.02 of the Note Purchase
Agreement in respect of the January 2, 2013 and February 1, 2013 Draw Dates, and
the Parties hereby acknowledge and agree that the Purchaser is under no
obligation to purchase any Notes that would otherwise have been available for
purchase and sale as of such Draw Dates.

2.    GENERAL

2.1    Defined Terms. Capitalized terms used herein which are not otherwise
defined herein shall have the meaning given to such terms in the Note Purchase
Agreement.

2.1    Full Force and Effect. Except to the extent specifically amended herein
or supplemented hereby, the Note Purchase Agreement remains in full force and
effect.

2.2    Counterparts. This Amendment may be executed in one or more counterparts,
each of which shall be deemed an original, but all of which together shall
constitute one and the same instrument.

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Exhibit 10.1

2

IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be duly
executed as of the date first written above.

CLEARWIRE CORPORATION

By:    /s/ Hope Cochran     
Name: Hope Cochran     
Title:    Chief Financial Officer     

CLEARWIRE COMMUNICATIONS LLC

By:    /s/ Hope Cochran     
Name: Hope Cochran     
Title:    Chief Financial Officer     

CLEARWIRE FINANCE, INC.

By:    /s/ Hope Cochran     
Name: Hope Cochran     
Title:    Chief Financial Officer     

SPRINT NEXTEL CORPORATION

By:    /s/ Charles Wunsch     
Name: Charles Wunsch     
Title:    Sr. VP, General Counsel, Corp. Secretary

[Signature page to the Second Amendment to the Note Purchase Agreement]