Level 3 to Support Clearwire’s National 4G WiMAX Network

Level 3 Communications, Inc. (NASDAQ: LVLT) today announced an expanded relationship with Clearwire Communications, LLC, an operating subsidiary of Clearwire Corporation, to support their CLEAR^TM 4G WiMax services. Level 3 will provide Clearwire with network transport services as part of their deployment of CLEAR^TM WiMax services in major metropolitan markets across the United States.

"With a nationwide network footprint, Level 3 offers the network reach and scale to meet our business needs as we rollout next generation broadband services,” said John Saw, chief technology officer for Clearwire. "As demand for the mobile Internet increases, we believe Level 3 offers the right combination of network infrastructure and service quality.”

Under the terms of the agreement, Level 3 will deliver high-speed Internet connectivity to major U.S. cities, including Chicago, Dallas, Philadelphia, Seattle, Washington, D.C., Houston and the Bay Area. Each 10 Gigabit Ethernet connection will carry data and Internet traffic for CLEAR^TM customers.

"Level 3 delivers nationwide network connectivity to support Clearwire in delivering advanced network technology for mobile broadband,” said Andrew Crouch, president of Wholesale Markets for Level 3. "As greater wireless market penetration and usage places more mobile voice, data, video and Internet traffic on networks, Level 3 is well positioned to meet the capacity demands of our wireless customers and support their ongoing business growth.”

About Clearwire

Clearwire Communications, LLC, an operating subsidiary of Clearwire Corporation (NASDAQ: CLWR), offers a robust suite of advanced high-speed Internet services to consumers and businesses. As part of a multi-year network build-out plan, Clearwire’s 4G service, called CLEAR™, will be available in major metropolitan areas across the U.S., and bring together an unprecedented combination of speed and mobility. Clearwire’s open all-IP network, combined with significant spectrum holdings, provides unmatched network capacity to deliver next generation broadband access. Strategic investors include Intel Capital, Comcast, Sprint, Google, Time Warner Cable, and Bright House Networks. Clearwire currently provides 4G service, utilizing WiMAX technology, in 24 markets and provides pre-WiMAX communications services in 37 markets across the U.S. and Europe. Headquartered in Kirkland, Wash., additional information about Clearwire is available at www.clearwire.com.

About Level 3 Communications

Level 3 Communications, Inc. (NASDAQ: LVLT) is a leading international provider of fiber-based communications services. Enterprise, content, wholesale and government customers rely on Level 3 to deliver services with an industry-leading combination of scalability and value over an end-to-end fiber network. Level 3 offers a portfolio of metro and long-haul services, including transport, data, Internet, content delivery and voice. For more information, visit www.Level3.com.

© Level 3 Communications, LLC. All Rights Reserved. Level 3, Level 3 Communications and the Level 3 Communications Logo are either registered service marks or service marks of Level 3 Communications, LLC and/or one of its Affiliates in the United States and/or other countries. Level 3 services are provided by wholly owned subsidiaries of Level 3 Communications, Inc. Any other service names, product names, company names or logos included herein are the trademarks or service marks of their respective owners.

Forward-Looking Statements

Some of the statements made in this press release are forward looking in nature. These statements are based on management’s current expectations or beliefs. These forward looking statements are not a guarantee of performance and are subject to a number of uncertainties and other factors, many of which are outside Level 3’s control, which could cause actual events to differ materially from those expressed or implied by the statements. The most important factors that could prevent Level 3 from achieving its stated goals include, but are not limited to, the current uncertainty in the global financial markets and the global economy; disruptions in the financial markets that could affect Level 3’s ability to obtain additional financing; as well as the company’s ability to: successfully integrate acquisitions; increase the volume of traffic on the network; defend intellectual property and proprietary rights; develop effective business support systems; manage system and network failures or disruptions; develop new services that meet customer demands and generate acceptable margins; attract and retain qualified management and other personnel; and meet all of the terms and conditions of debt obligations. Additional information concerning these and other important factors can be found within Level 3’s filings with the Securities and Exchange Commission. Statements in this press release should be evaluated in light of these important factors. Level 3 is under no obligation to, and expressly disclaims any such obligation to, update or alter its forward-looking statements, whether as a result of new information, future events, or otherwise.

This release, and other written and oral statements made by Clearwire from time to time, contains forward-looking statements which are based on management’s current expectations and beliefs, as well as on a number of assumptions concerning future events made with information that is currently available. Forward-looking statements may include, without limitation, management’s expectations regarding: future financial and operating performance and financial condition; proposed transactions; network development and market launch plans; strategic plans and objectives; industry conditions; the strength of the balance sheet; and liquidity and financing needs. The words "will,” "would,” "may,” "should,” "estimate,” "project,” "forecast,” "intend,” "expect,” "believe,” "target,” "designed,” "plan” and similar expressions are intended to identify forward-looking statements. Readers are cautioned not to put undue reliance on such forward-looking statements, which are not a guarantee of performance and are subject to a number of uncertainties and other factors, many of which are outside of Clearwire's control, which could cause actual results to differ materially and adversely from such statements. Some factors that could cause actual results to differ are:

• We are an early-stage company with a history of operating losses and we expect to continue to realize significant net losses for the foreseeable future.
• Our business plan will require us to raise substantial additional financing both in the near term and long term, and if we are unable to raise such financing on acceptable terms we will need to modify our business plan accordingly, such as making material adjustments to our current network expansion plans, including potential delays in the timing, or decreases in the scope, of expansion.
• Our pending financing transactions are subject to closing conditions that, if not satisfied, could result in the transactions not being completed.
• We may fail to realize all of the anticipated benefits of the transactions with Sprint and the strategic investors.
• We are committed to using commercially reasonable efforts to deploy wireless broadband networks based solely on mobile WiMAX technology, even if there are alternative technologies available in the future that are technologically superior or more cost effective.
• We currently depend on our commercial partners to develop and deliver the equipment for our pre-WiMAX and mobile WiMAX networks.
• Many of our competitors are better established and have significantly greater resources, and may subsidize their competitive offerings with other products and services.
• Our substantial indebtedness and restrictive debt covenants could limit our financing options and liquidity position and may limit our ability to grow our business.
• Sprint Nextel Corporation owns a majority of our shares, resulting in Sprint holding a majority voting interest in the Company, and Sprint may have, or may develop in the future, interests that may diverge from other stockholders.
• Future sales of large blocks of our common stock may adversely impact our stock price.

For a more detailed description of the factors that could cause such a difference, please refer to Clearwire’s filings with the Securities and Exchange Commission, including the information under the heading "Risk Factors” in our Annual Report on Form 10-K filed on March 26, 2009 and our Quarterly Report on Form 10-Q filed on August 13, 2009. Clearwire assumes no obligation to update or supplement such forward-looking statements.