Clearwire

April 26, 2011

Grand Rapids City and Suburbs Now Benefit from Blazing Fast Wireless Speeds Connecting Laptops, Netbooks, PDAs, Smartphones and Tablets

Regional Grand Rapids 4G Network Now Covers 306,220 people

KIRKLAND, Wash. and OVERLAND PARK, Kan. – April 26, 2011 – Clearwire (NASDAQ: CLWR) and Sprint (NYSE: S) today announced a significant expansion of the Clearwire 4G network footprint and key capacity upgrades for mobile broadband customers in the greater Grand Rapids metro area. The regional CLEAR® and Sprint 4G service area has added coverage for an additional 24,707 people. Now, more than 306,220 people in the Grand Rapids area have access to Clearwire’s 4G mobile broadband network. This expansion represents new coverage since Clearwire’s initial launch on August 3, 2010.

Enhanced capacity and expanded coverage can be experienced in the following communities:

• Grandville, MI
• Kentwood, MI
• Grand Rapids, MI
• Jenison, MI
• East Grand Rapids, MI