Exhibit 32.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

REQUIRED BY RULE 13a-14(b) or RULE 15d-14(b)

AND SECTION 906 OF THE SARBANES-OXLEY ACT

OF 2002, 18 U.S.C. SECTION 1350

In connection with the Quarterly Report of Clearwire Corporation (the “Company”) on Form 10-Q for the quarter ended June 30, 2012 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Erik Prusch, Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the Company.

/s/ ERIK PRUSCH

Erik Prusch

Chief Executive Officer

Clearwire Corporation

July 27, 2012