PerfectlyCLEAR

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About ClearwireHeadquartered in Kirkland, WATelecom pioneer, Craig McCaw, founded Clearwire in October 2003 and launched the first market in 2004. Now offering service in over 200 cities in 54 markets nationwide.Clearwire is a provider of reliable, wireless high-speed Internet and Clearwire Internet Phone Service that is Portable, Simple, High Speed, Secure, and Affordable; a provider of next-generation wireless broadband services that enable reliable communications anytime and anywhere within its coverage area.CLEAR in Portland, Atlanta, Las Vegas and coming soon to Philadelphia!

About ClearwireOn May 7, 2008, Clearwire Corporation and Sprint Nextel Corporation entered into a definitive agreement to combine their next-generation wireless broadband businesses to form a new company to expedite the deployment of the first nationwide mobile WiMAX network. In conjunction with this agreement, Intel Corporation (through Intel Capital); Google Inc.; Comcast Corporation; Cisco Systems Inc, Time Warner Cable Inc; and Bright House Networks have collectively agreed to invest $3.2 billion into the new company.

In conjunction with this agreement, Intel Corporation (through Intel Capital); Google Inc.; Comcast Corporation; Cisco Systems Inc, Time Warner Cable Inc; and Bright House Networks have collectively agreed to invest $3.2 billion into the new company.

About ClearwireThe new company is named Clearwire, and is headquartered in Kirkland. The existing Clearwire management team will continue to lead and operate the new company. The company will remain focused on building a national network that provides a true mobile broadband experience at home, in the office and on the road.

ClearwireMarkets

CLEAR Markets• Current CLEAR markets Portland launched 1/6 Atlanta launched 6/15 Las Vegas launched 7/21 Philadelphia coming soon! • Mobile WiMAX network expansion under way enabling coverage of up to 120 million Americans across 80 markets in 2010. 2009: Chicago, Charlotte, Dallas/Fort Worth, Honolulu, Philadelphia, and Seattle among cities going “CLEAR” in 2009. 2010: New York, Boston, Washington, D.C., Houston and the San Francisco Bay Area lead list of planned 2010 launches.

Portland launched 1/6

Atlanta launched 6/15

Las Vegas launched 7/21

Philadelphia coming soon!

2009: Chicago, Charlotte, Dallas/Fort Worth, Honolulu, Philadelphia, and Seattle among cities going “CLEAR” in 2009.

2010: New York, Boston, Washington, D.C., Houston and the San Francisco Bay Area lead list of planned 2010 launches.

Portland Mobile WiMAX Coverage8

Bringing All of the Pieces Together9

(1)Clearwire WiMAX Portfolio (1)Clearwire Mobile ModemsFuture Embedded Services inConsumer ElectronicsMobile Broadband ServicesEmbedded Services in Laptops, Netbooks& Mobile Internet DevicesResidentialBroadband &Voice ServicesFuture Unified Voice Services3G Voice and Data MVNOFuture ConsumerAnd Business 4G PhonesMobile VoiceServicesMobile Entertainment,Digital MediaFuture Mobile Video and in Vehicle ServicesISP Service Portal,Mobile Video,And AdvertisingDevelopment Partners(1) Represents Clearwire’s portfolio post closing10

Mobile Internet DevicesNew Application AreasHandset/CE VendorsDesign and ManufacturersSilicon VendorsElektrobitLG ElectronicsWiMAX Device Ecosystem ReadinessPC VendorsGE Gridnet, smartpower meters>9 SiliconVendorsBuilding the first real open network business modelfor devices and applicationsSource: Industry Press Releases of Committed Product Intentions or Announcements11

People Are Talking About WiMAX and ClearwireBig investors join Clearwire's WiMAX planUSA Today, 5/7/2008 Wireless Industry Buzzing About WiMAXUSA TODAY, 3/26/07WiMAX Gets RealForbes 5/7/08U.N. Agency Gives Boost to WiMAXNew York Times, 10/20/07The Top 10 Wireless Trends For 2008[WiMAX #5]Fortune, 12/31/07 WiMAX Puts Citywide Wireless Broadband In Sight USA Today, 8/10/04WiMAX Deal Could Lead To Universal ConnectivitySeattle Times, 5/12/08“Imagine having Net access almost anywhere. Clearwire has a new service that comes close to providing just that…”Businessweek, August 23, 2007 “…a WiMAX network would leapfrog other carriers in terms of connection speeds… WiMAX deployment is cheaper and covers more people…Forbes, 8/17/07“…Part of the optimism [about Clearwire] is based on the track record of McCaw, who more than a decade ago stitched together the first nationwide cellular empire…”Businessweek, “Clearwire: Taking WiMAX to the Street,” 3/5/07Technology Giants Form WiMAX Patent Alliance. Cisco Systems, Intel, Alcatel-Lucent, Samsung Electronics, Sprint Nextel and Clearwire…International Herald Tribune, 6/10/0812

3G/CellularWiFiWiMAXConsumers Choose WiMAX!Usage LimitsWhere You Can Use ItCoverageSpeed DescriptionPriceSpeedCan’t run peer-to-peer, sling box, video camera, etc. Monthly download cap – 5GB w possible service overageDown 600 kbps – 1.4 Mbps/up 350 -800 kbpsDownload 30 min itunes/TV show in 14 minAt home or in publicEverywhere Nationwide$60 - $70 per monthOnly in publicDown 500 kbps – 2 Mbps/up 300 kbps – 1 MbpsDownload 30 min itunes/TV show in 10 minUnlimited Very selected areas in most cities$20 - $30 per monthDown 2 – 6 Mbps/up 1 MbpsDownload 30 min itunes/TV show in 5 minAt home or in publicEverywhere in home city and 1/3 of major US cites$40 - $50 per monthUnlimitedThe offers consumers most prefer when factoring in the assumptions above:WiMAXWiFi3G/CellularSource: In-Stat, In-Depth Analysis, June 200813

3G/CellularWiFiWiMAXConsumers Choose WiMAX!Usage LimitsWhere You Can Use ItCoverageSpeed DescriptionPriceSpeedCan’t run peer-to-peer, sling box, video camera, etc. Monthly download cap – 5GB w possible service overageDown 600 kbps – 1.4 Mbps/up 350 -800 kbpsDownload 30 min itunes/TV show in 14 minAt home or in publicEverywhere Nationwide$60 - $70 per monthOnly in publicDown 500 kbps – 2 Mbps/up 300 kbps – 1 MbpsDownload 30 min itunes/TV show in 10 minUnlimited Very selected areas in most cities$20 - $30 per monthDown 2 – 6 Mbps/up 1 MbpsDownload 30 min itunes/TV show in 5 minAt home or in publicEverywhere in home city and 1/3 of major US cites$40 - $50 per monthUnlimitedThe offers consumers most prefer when factoring in the assumptions above:WiMAXWiFi3G/CellularSource: In-Stat, In-Depth Analysis, June 200814