Bellevue, Wash., Dec. 12, 2011- Clearwire Corporation (NASDAQ: CLWR) ("Clearwire") today announced that the underwriters exercised their option to purchase an additional $52.5 million, or 26,250,000 shares, of Clearwire's Class A Common Stock (the "optional shares") in the previously announced $350.0 million public offering of Clearwire's Class A Common Stock (the "initial shares"), resulting in a total sale to the public of 201,250,000 shares of Class A Common Stock. Both the initial shares and the optional shares are expected to be issued and delivered on December 13, 2011.

Clearwire plans to use the net proceeds for general corporate and working capital purposes, including the deployment of mobile 4G LTE technology alongside the mobile 4G WiMAX technology currently on its network and for the operation and maintenance of its networks and to pay fees and expenses associated with this offering.

J.P. Morgan, BofA Merrill Lynch and Jefferies are acting as joint book-running managers for this offering.

The offering was made pursuant to an effective shelf registration statement filed with the Securities and Exchange Commission. The offering was made only by means of the written prospectus and prospectus supplement that form a part of the registration statement. A copy of the prospectus and prospectus supplement related to the offering may be obtained by contacting: J.P. Morgan, c/o Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, New York 11717, or by calling toll-free at 1-866-803-9204, or BofA Merrill Lynch, 4 World Financial Center, New York, New York, 10080, Attn: Prospectus Department or by email at dg.prospectus_requests@baml.com, or Jefferies, Equity Syndicate Prospectus Department, at 520 Madison Avenue, 12th Floor, New York, NY 10022, at 877-547-6340 and at Prospectus_Department@Jefferies.com.