Clear wireless Mobile WiMax Broadband Internet Service - www.portlandclearwireless.com

1. Perfectly CLEAR

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3. About Clearwire Headquartered in Kirkland, WA Telecom 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!

5. ClearwireMarkets

7. Atlanta launched 6/15

8. Las Vegas launched 7/21

11. Bringing All of the Pieces Together 9

12. (1) Clearwire WiMAX Portfolio (1) Clearwire Mobile Modems Future Embedded Services in Consumer Electronics Mobile Broadband Services Embedded Services in Laptops, Netbooks & Mobile Internet Devices Residential Broadband & Voice Services Future Unified Voice Services 3G Voice and Data MVNO Future Consumer And Business 4G Phones Mobile Voice Services Mobile Entertainment, Digital Media Future Mobile Video and in Vehicle Services ISP Service Portal, Mobile Video, And Advertising Development Partners (1) Represents Clearwire’s portfolio post closing 10

13. Mobile Internet Devices New Application Areas Handset/CE Vendors Design and Manufacturers Silicon Vendors Elektrobit LG Electronics WiMAX Device Ecosystem Readiness PC Vendors GE Gridnet, smart power meters >9 Silicon Vendors Building the first real open network business modelfor devices and applications Source: Industry Press Releases of Committed Product Intentions or Announcements 11

14. People Are Talking About WiMAX and Clearwire Big investors join Clearwire's WiMAX plan USA Today, 5/7/2008 Wireless Industry Buzzing About WiMAX USA TODAY, 3/26/07 WiMAX Gets Real Forbes 5/7/08 U.N. Agency Gives Boost to WiMAX New York Times, 10/20/07 The Top 10 Wireless Trends For 2008 [WiMAX #5] Fortune, 12/31/07 WiMAX Puts Citywide Wireless Broadband In Sight USA Today, 8/10/04 WiMAX Deal Could Lead To Universal Connectivity Seattle 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,” 3/5/07 Technology Giants Form WiMAX Patent Alliance. Cisco Systems, Intel, Alcatel-Lucent, Samsung Electronics, Sprint Nextel and Clearwire… International Herald Tribune, 6/10/08 12

15. 3G/Cellular WiFi WiMAX Consumers Choose WiMAX! Usage Limits Where You Can Use It Coverage Speed Description Price Speed Can’t run peer-to-peer, sling box, video camera, etc. Monthly download cap – 5GB w possible service overage Down 600 kbps – 1.4 Mbps/up 350 -800 kbps Download 30 min itunes/TV show in 14 min At home or in public Everywhere Nationwide $60 - $70 per month Only in public Down 500 kbps – 2 Mbps/up 300 kbps – 1 Mbps Download 30 min itunes/TV show in 10 min Unlimited Very selected areas in most cities $20 - $30 per month Down 2 – 6 Mbps/up 1 Mbps Download 30 min itunes/TV show in 5 min At home or in public Everywhere in home city and 1/3 of major US cites $40 - $50 per month Unlimited The offers consumers most prefer when factoring in the assumptions above: WiMAX WiFi 3G/Cellular Source: In-Stat, In-Depth Analysis, June 2008 13

16. 3G/Cellular WiFi WiMAX Consumers Choose WiMAX! Usage Limits Where You Can Use It Coverage Speed Description Price Speed Can’t run peer-to-peer, sling box, video camera, etc. Monthly download cap – 5GB w possible service overage Down 600 kbps – 1.4 Mbps/up 350 -800 kbps Download 30 min itunes/TV show in 14 min At home or in public Everywhere Nationwide $60 - $70 per month Only in public Down 500 kbps – 2 Mbps/up 300 kbps – 1 Mbps Download 30 min itunes/TV show in 10 min Unlimited Very selected areas in most cities $20 - $30 per month Down 2 – 6 Mbps/up 1 Mbps Download 30 min itunes/TV show in 5 min At home or in public Everywhere in home city and 1/3 of major US cites $40 - $50 per month Unlimited The offers consumers most prefer when factoring in the assumptions above: WiMAX WiFi 3G/Cellular Source: In-Stat, In-Depth Analysis, June 2008 14