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    Clearwire Reports 2007 Fourth Quarter and Full-Year Results

    Consolidated Highlights

    Covered POPs Increase 70% During 2007

    Net Subscribers Grow 91% Over Prior Year

    Fourth Quarter Service Revenues Increase 91% Over Same Quarter Last Year

    Market-Level Progress

    Initial Markets Subscribers Grow 42% Over Same Quarter Last Year

    Fourth-Quarter Initial Markets Revenues Increase 52% Over Same Quarter Last Year

    24 Markets Achieve Market EBITDA Positive Results in the Fourth Quarter

    KIRKLAND, Wash.--(BUSINESS WIRE)--March 4, 2008--Clearwire Corporation ("Clearwire") (Nasdaq:CLWR), a leading provider of wireless high-speed Internet service, today reported financial and operating results for the fourth quarter and year ended December 31, 2007.

    Benjamin G. Wolff, chief executive officer of Clearwire, said, "2007 was a banner year for our company as we made significant progress in both our new market development and our existing market operations. On the new market development side of our company, progress was marked by nearly doubling the size of our network footprint, launching 14 new markets, successfully completing initial trials of the mobile WiMAX technology that we expect to deploy in the second half of this year and increasing our spectrum portfolio by more than 3 billion MHz/POPs.

    "With respect to the market operations side of our business, key milestones included a year-end subscriber base of nearly 400,000, which reflects an annual growth rate of approximately 91%, more than doubling our service revenues and, most importantly, increasing the number of our operating markets that were cash flow positive on a Market EBITDA basis from four in the fourth quarter of 2006 to 24 at the end of fourth quarter 2007.

    "During the year, we increased our product portfolio to include VoIP and PC cards, continuing to demonstrate that our fast, simple, portable and reliable wireless broadband service has mass market appeal. Penetration in some of our most successful markets now exceeds 20% of the homes covered by our network in these markets, despite vigorous competition," Wolff said.

    "As we move ahead in 2008, we look forward to building on the success of our residential broadband and voice services through the planned deployment of mobile WiMAX networks, which for the first time will enable customers to enjoy all that the Internet has to offer when they are both at home and away, with a simple and seamless 'True Broadband' experience from a single, unified wireless network," commented Wolff.

    2007 Fourth Quarter Consolidated Results

    Average Revenue Per User (or ARPU) for the 2007 fourth quarter was just over $36, which was slightly below the year-ago quarter, primarily due to an increase in holiday season sales promotions and slightly higher international bad debt expense. Consolidated churn was 2.4% in the 2007 fourth quarter, while domestic churn was 2.1% in the same period.

    Consolidated service revenues were $45.4 million in the quarter, versus $23.7 million for the same quarter of 2006, or a growth rate of 91%. The growth in service revenues was driven primarily by Clearwire's rapid subscriber growth. Clearwire added 47,000 subscribers and launched two new markets in Charlotte, N.C., and Rochester, N.Y., in the fourth quarter.

    Adjusted EBITDA reflected a loss of $83.1 million, versus an Adjusted EBITDA loss of $62.0 million for the same period in the prior year. The increased loss compared to the year-ago quarter was due primarily to increased sales, general and administrative (or SG&A) costs from targeted marketing efforts to create brand awareness around launches in the new markets, as well as additional Cost per Gross Addition (or CPGA) incurred to acquire new customers. Increased expenses were also attributable to an increase in headcount in support of Clearwire's growth initiatives and other corporate initiatives related to operations support systems, billing support systems, mobile WiMAX deployment and portal services.

    Capital Expenditures (or CAPEX) for the fourth quarter were $82.7 million, which exceeded the CAPEX level of $62.7 million in the same period last year. The increased CAPEX in the fourth quarter was due to the Rochester and Charlotte market launches and expenditures associated with future market deployments.

    2007 Full-Year Consolidated Results

    Clearwire ended 2007 with approximately 16.3 million people covered by its network in 50 domestic and international markets compared with approximately 9.6 million people in 36 markets at the end of 2006, representing an increase of approximately 70% in Clearwire's market opportunity for the year.

    Clearwire ended the year with approximately 394,000 subscribers, reflecting an increase of approximately 188,000 subscribers during the year, or a growth rate of 91%. This solid subscriber growth resulted from increased penetration in Clearwire's established markets, as well as an expansion in the number of markets covered by its network.

    Service revenues for the year ended December 31, 2007, were $151.4 million, which reflected a 124% increase over 2006 service revenues of $67.6 million. The revenue growth was driven by the 91% increase in subscribers during 2007, as well as higher year-over-year ARPU results. ARPU for 2007 was $36.81, an increase of 5% versus the 2006 full-year ARPU of $35.06 for 2006. Churn increased slightly in 2007 to 2.1% from 1.9% in 2006.

    Clearwire reported an Adjusted EBITDA loss of $289.0 million for the year, compared with an Adjusted EBITDA loss of $164.2 million in 2006. The expanded loss was driven by an increase in direct operating costs related to the 14 new markets Clearwire launched in 2007 and an increase in SG&A related to the new markets and other corporate initiatives in support of Clearwire's growth, including customer acquisition costs. CPGA was essentially flat at approximately $440 due to the number and size of market launches throughout the year.

    CAPEX was $361.9 million in 2007, versus $191.7 million in 2006, reflecting the increased investment in network deployments and customer premise equipment and, to a lesser extent, operations support systems, billing support systems, and mobile WiMAX development efforts.

    In addition, at the beginning of 2008, Clearwire had more than 36.0 million POPs in various stages of design, development and construction, which Clearwire believes provides it with flexibility to modulate the pace of its market deployment in 2008 up or down based on the availability of required capital.

    The table below summarizes Clearwire's 2007 fourth quarter and full-year reported consolidated results, versus the 2006 fourth quarter and full-year consolidated results.

                            Clearwire Corporation
                 Summary of Income Statement Data (unaudited)
                     In thousands, unless otherwise noted
    
    
                                            Three Months Ended December
                                                         31st
    REVENUE                                    2007     2006   % Change
                                            ------------------------------
     Service                                $  45,384 $ 23,743       91%
     Equipment                                      -        -        -
                                            ------------------------------
    Total Revenue                              45,384   23,743       91%
    
     Cost of Service                           37,965   16,439      131%
     Cost of Equipment                              -        -        -
                                            ------------------------------
    Gross Margin                                7,419    7,304        2%
    Gross Margin %                                 16%      31%
    
    Selling, General and Administrative       101,210   72,137       40%
    Research and Development                      180      420      (57%)
    Spectrum Lease Expense                     39,874    8,867      350%
    Gain on Sale of NextNet                         -        -        -
                                            ------------------------------
    EBITDA Loss                              (133,845) (74,120)      81%
    
    Adjustment for Non-Cash Items              50,713   12,105      319%
                                            ------------------------------
    Adjusted EBITDA Loss                    $ (83,132)$(62,015)      34%
    
    KEY OPERATING METRICS (k for '000's, MM for '000,000's)
     Net Subscriber Additions                      47k      44k
     Total Subscribers                            394k     206k
     ARPU                                   $   36.09 $  36.39
     Churn                                        2.4%     1.9%
     CPGA                                   $     477 $    515
     Capital Expenditures                   $  82.7MM $ 62.7MM
     Covered POPS                              16.3MM    9.6MM
     Cash, Cash Equivalents and
      Investments                           $ 1,032MM $1,102MM
    
    
                                            Twelve Months Ended December
                                                         31st
    REVENUE                                    2007      2006   % Change
                                            ------------------------------
     Service                                $ 151,440 $  67,598      124%
     Equipment                                      -    32,583        -
                                            ------------------------------
    Total Revenue                             151,440   100,181       51%
    
     Cost of Service                          107,281    50,438      113%
     Cost of Equipment                              -    19,674        -
                                            ------------------------------
    Gross Margin                               44,159    30,069       47%
    Gross Margin %                                 29%       30%
    
    Selling, General and Administrative       360,666   214,669       68%
    Research and Development                    1,397     8,890      (84%)
    Spectrum Lease Expense                     96,417    23,516      310%
    Gain on Sale of NextNet                         -   (19,793)       -
                                            ------------------------------
    EBITDA Loss                              (414,321) (197,213)     110%
    
    Adjustment for Non-Cash Items             125,314    32,991      280%
                                            ------------------------------
    Adjusted EBITDA Loss                    $(289,007)$(164,222)      76%
    
    KEY OPERATING METRICS (k for '000's, MM for '000,000's)
     Net Subscriber Additions                     188k      144k
     Total Subscribers                            394k      206k
     ARPU                                   $   36.81 $   35.06
     Churn                                        2.1%      1.9%
     CPGA                                   $     440 $     441
     Capital Expenditures                   $ 361.9MM $ 191.7MM
     Covered POPS                              16.3MM     9.6MM
     Cash, Cash Equivalents and
      Investments                           $ 1,032MM $ 1,102MM
    

    Note: For a definition and reconciliation of non-GAAP financial measures, including Adjusted EBITDA, ARPU, Churn, CPGA, EBITDA and Market EBITDA, please refer to the section titled "Definition of Terms and Reconciliation of Non-GAAP Financial Measures" at the end of this release.

        Market-Level Progress
    
        Fourth Quarter Results
    

    Clearwire believes that its market-level progress in 2007 reflects its continued focus on driving markets rapidly toward profitability.

    Clearwire's initial 25 U.S. markets, or Initial Markets, all of which commenced operations prior to 2006, achieved 42% net subscriber growth in the fourth quarter of 2007 versus the same quarter in the prior year.

    The Initial Markets service revenue was $23.7 million in the fourth quarter of 2007, versus $15.5 million in the 2006 fourth quarter, reflecting a growth rate of 52%. In addition, the gross margin in the Initial Markets increased to 76% for the fourth quarter, versus a gross margin of 72% for fourth quarter of 2006. Market EBITDA for the Initial Markets was $2.6 million in the quarter, or 11% of revenue, compared to a Market EBITDA loss of $3.2 million in the year-ago quarter. The Market EBITDA improvement resulted from a consistent focus on driving economies of scale and emphasis on containing SG&A expense.

    Full-Year 2007 Results

    Clearwire ended the year with approximately 215,000 subscribers in its Initial Markets, reflecting an increase of approximately 64,000 subscribers for the year, or a growth rate of 42%. The Initial Markets service revenue for 2007 was $85.7 million, versus $45.7 million in 2006, yielding an 88% growth rate, which was driven primarily by the large subscriber increases. Gross margin as a percent of revenues in these markets expanded to 75%, versus 65% in 2006. This solid improvement in gross margin was driven by increased network efficiencies, as Clearwire continued to penetrate the Initial Markets and leverage its network assets. The Initial Markets generated a Market EBITDA margin of 6% for 2007, compared with a negative 56% Market EBITDA margin in 2006.

    By the end of the year, 20 additional markets turned Market EBITDA positive, bringing the total number of Market EBITDA positive markets to 24 out of our 46 domestic markets in the fourth quarter.

    "We are highly focused on consistently improving execution in each of our markets," added Wolff. "Over half of our domestic markets were Market EBITDA positive, in the fourth quarter of 2007, even before any of the additional revenue streams that will be made possible by mobile WiMAX are implemented. We now have markets exceeding 30% Market EBITDA margins, which we believe demonstrates a scalable, replicable business model."

                         Initial Markets Performance
                 Summary of Income Statement Data (unaudited)
                     In thousands, unless otherwise noted
    
                       Three Months Ended         Twelve Months Ended
                           December 31st              December 31st
                       2007    2006  % Change     2007     2006  % Change
                    -------------------------- ---------------------------
     Total
      Revenue       $23,662 $15,549        52% $85,701 $ 45,685        88%
    
     Gross Margin   $18,084 $11,221        61% $64,082 $ 29,762       115%
     Gross Margin
      %                  76%     72%                75%      65%
    
     Market
      EBITDA        $ 2,584 $(3,248)      180% $ 5,308 $(25,678)      121%
     EBITDA %            11%    (21%)                6%     (56%)
    
    KEY OPERATING METRICS (k for '000's, MM for '000,000's)
     Total              215k     151k              215k      151k
      Subscribers
     ARPU           $ 37.04 $ 36.79            $ 37.25 $  35.36
     Churn              2.3%    1.9%               2.0%     1.8%
     CPGA           $   428 $   431            $   380 $    411
     Covered POPS     4.4MM   4.1MM              4.4MM    4.1MM
     Number of
      EBITDA
      positive
      markets            21       4                 21        4
    

    2008 Guidance Outlined

    The table below sets forth Clearwire's consolidated 2008 full-year guidance.

    Consolidated Clearwire 2008 Guidance
            Item             12/31/08     Percentage Increase
    Covered POPs Growth      20 - 22M          23% - 35%
    Subscribers             510 - 530K         29% - 35%
    Revenue                $205 - $215M        36% - 42%
    CAPEX                 $275M - $290M       (20% - 24%)
    

    Management Webcast

    Clearwire's senior leadership team will discuss the company's 2007 and fourth quarter performance during a conference call and simultaneous webcast at 11 a.m. Eastern Time (8 a.m. Pacific Time) today. The call is expected to last approximately 60 minutes. To access today's conference call, please call 888-680-0892, or outside the United States please call 617-213-4858. The conference call passcode is 78850119. The simultaneous webcast can be accessed via the Internet at http://investors.clearwire.com. The conference call will be archived and available for replay until midnight Eastern Time (9 p.m. Pacific Time), on March 18, 2008. To access the replay, please call 888-286-8010, or outside the United States please call 617-801-6888. The replay passcode is 38903556.

    About Clearwire

    Clearwire, founded in October 2003 by telecom pioneer Craig O. McCaw, is a provider of simple, fast, portable and reliable wireless high-speed Internet service. Clearwire customers connect to the Internet using licensed spectrum, thus eliminating the confines of traditional cable or phone lines. Headquartered in Kirkland, Wash., the company launched its first market in August 2004 and now offers service in 16 states across the U.S. as well as in Europe. For more information, visit www.clearwire.com.

    Forward-Looking Statements

    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; development, network launch, and strategic plans and objectives; industry conditions; the strength of its balance sheet; and liquidity and financing needs. 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 over the next five years or more.

    -- We are committed to using commercially reasonable efforts to deploy wireless broadband networks based solely on mobile WiMAX technology once that technology meets certain specified performance criteria, even if there are alternative technologies available in the future that are technologically superior or more cost effective.

    -- Our business plan contemplates migration of our current network to a mobile WiMAX network, which is not yet commercially available, and may never be developed to our satisfaction or at all.

    -- We currently depend on our commercial partners to develop and deliver the equipment for our existing and planned 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.

    -- Craig McCaw and Intel Capital collectively control a majority of our combined voting power, and 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 headings "Risk Factors" and "Forward-Looking Statements" in Quarterly Report on Form 10-Q filed on November 14, 2007. Clearwire assumes no obligation to update or supplement such forward-looking statements.

    
                    CLEARWIRE CORPORATION AND SUBSIDIARIES
                         CONSOLIDATED BALANCE SHEETS
               (in thousands, except share and per share data)
                                 (Unaudited)
    
    
                                                   December    December
                                                      31,          31,
                                                     2007         2006
                                                  ------------ -----------
    ASSETS
    CURRENT ASSETS:
     Cash and cash equivalents                    $   876,752  $  438,030
     Short-term investments                            67,012     663,644
     Restricted cash                                    1,077      10,727
     Restricted investments                                 -      69,401
     Accounts receivable, net of allowance of $787
      and $753                                          3,677       2,774
     Notes receivable short-term, related party         2,134       4,409
     Inventory                                          2,312       1,398
     Prepaids and other assets                         36,748      19,219
                                                  ------------ -----------
         Total current assets                         989,712   1,209,602
     Property, plant and equipment, net               572,329     302,798
     Restricted cash                                   11,603         117
     Restricted investments                                 -      16,269
     Long-term investments                             88,632           -
     Notes receivable long-term, related party          4,700           -
     Prepaid spectrum license fees                    457,741     241,151
     Spectrum licenses and other intangible
      assets, net                                     480,003     222,980
     Goodwill                                          35,666      30,908
     Investments in equity investees                   14,602      14,983
     Other assets                                      30,981      29,565
                                                  ------------ -----------
    TOTAL ASSETS                                  $ 2,685,969  $2,068,373
                                                  ============ ===========
    
    LIABILITIES AND STOCKHOLDERS' EQUITY
    CURRENT LIABILITIES:
     Accounts payable and accrued expenses        $   102,447  $  108,216
     Deferred rent                                     24,805       6,986
     Deferred revenue                                  10,010       5,599
     Due to affiliate                                       2         532
     Current portion of long-term debt                 22,500       1,250
                                                  ------------ -----------
          Total current liabilities                   159,764     122,583
     Long-term debt, net of discount of $0 and
      $110,007                                      1,234,375     644,438
     Other long-term liabilities                      114,492      42,385
                                                  ------------ -----------
          Total liabilities                         1,508,631     809,406
    MINORITY INTEREST                                  13,506       1,358
    STOCKHOLDERS' EQUITY
          Preferred stock, par value $0.0001,
           5,000,000 shares authorized; no shares
           issued or outstanding
          Common stock, par value $0.0001, and
           additional paid-in capital, 350,000,000
           shares authorized; Class A, 135,567,269
           and 109,325,236 shares issued and
           outstanding                              2,098,155   1,474,759
     Class B, 28,596,685 shares issued and
      outstanding                                     234,376     234,376
     Common stock and warrants payable                      -         166
     Deferred compensation                                  -        (116)
     Accumulated other comprehensive income            17,333       6,990
     Accumulated deficit                           (1,186,032)   (458,566)
                                                  ------------ -----------
          Total stockholders' equity                1,163,832   1,257,609
                                                  ------------ -----------
    TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY    $ 2,685,969  $2,068,373
                                                  ============ ===========
    
                    CLEARWIRE CORPORATION AND SUBSIDIARIES
                    CONSOLIDATED STATEMENTS OF OPERATIONS
                    (In thousands, except per share data)
                                 (Unaudited)
    
    
                                              Year Ended December 31,
                                             2007       2006       2005
                                          ---------- ---------- ----------
    REVENUES:
     Service                              $ 151,440  $  67,598  $   8,451
     Equipment and other                          -     32,583     25,003
                                          ---------- ---------- ----------
         Total revenues                     151,440    100,181     33,454
    OPERATING EXPENSES:
     Cost of goods and services (exclusive
      of a portion of depreciation and
      amortization shown below):
      Cost of service                       107,281     50,438     13,086
      Cost of equipment                           -     19,674     10,483
     Selling, general and administrative
      expense                               360,666    214,669    106,211
     Research and development                 1,397      8,890      9,639
     Depreciation and amortization           84,694     40,902     11,913
     Spectrum lease expense                  96,417     23,516      9,356
     Gain on sale of NextNet                      -    (19,793)         -
                                          ---------- ---------- ----------
         Total operating expenses           650,455    338,296    160,688
                                          ---------- ---------- ----------
    OPERATING LOSS                         (499,015)  (238,115)  (127,234)
    OTHER INCOME (EXPENSE):
     Interest income                         65,736     30,429      6,605
     Interest expense                       (96,279)   (72,280)   (14,623)
     Foreign currency gains, net                363        235         20
     Loss on extinguishment of debt        (159,193)         -          -
     Other-than-temporary impairment loss
      on investments                        (35,020)         -          -
     Other income, net                        1,801      2,150        300
                                          ---------- ---------- ----------
      Total other expense, net             (222,592)   (39,466)    (7,698)
                                          ---------- ---------- ----------
    LOSS BEFORE INCOME TAXES, MINORITY
     INTEREST AND LOSSES FROM EQUITY
     INVESTEES                             (721,607)  (277,581)  (134,932)
     Income tax provision                    (5,427)    (2,981)    (1,459)
                                          ---------- ---------- ----------
    LOSS BEFORE MINORITY INTEREST AND
     LOSSES FROM EQUITY INVESTEES          (727,034)  (280,562)  (136,391)
     Minority interest in net loss of
      consolidated subsidiaries               4,244      1,503        387
     Losses from equity investees            (4,676)    (5,144)    (3,946)
                                          ---------- ---------- ----------
    NET LOSS                              $(727,466) $(284,203) $(139,950)
                                          ========== ========== ==========
    
    Net loss per common share, basic and
     diluted                              $   (4.58) $   (2.93) $   (1.97)
                                          ========== ========== ==========
    Weighted average common shares
     outstanding, basic and diluted         158,737     97,085     71,075
                                          ========== ========== ==========
    
                    CLEARWIRE CORPORATION AND SUBSIDIARIES
                     CONSOLIDATED STATEMENT OF CASHFLOWS
                                (In thousands)
                                 (Unaudited)
    
    
                                            Year Ended December 31,
                                          2007         2006        2005
                                      ------------ ------------ ----------
    CASH FLOWS FROM OPERATING
     ACTIVITIES:
    Net loss                          $  (727,466) $  (284,203) $(139,950)
        Adjustments to reconcile net
         loss to net cash used in
         operating activities:
        Provision for uncollectible
         accounts                           4,915          885        368
        Depreciation and amortization      84,694       40,902     11,913
        Amortization of prepaid
         license fees                      37,884        6,273      2,914
        Amortization of deferred
         financing costs and accretion
         of debt discount                  20,707       19,754      5,279
        Deferred income taxes               5,412        2,960      1,459
        Share-based compensation           42,771       14,246      2,542
        Minority interest                  (4,244)      (1,503)      (387)
        Losses from equity investees,
         net                                4,676        5,144      3,946
        Loss on extinguishment of debt    159,193           --         --
        Other-than-temporary
         impairment loss on
         investments                       35,020           --         --
        Loss (gain) on other asset
         disposals                            850       (1,915)       841
        Gain on sale of equity
         investment                        (2,213)          --         --
        Gain on sale of business, net
         of cash                               --      (19,793)        --
    Changes in assets and liabilities,
     net of effects from acquisitions:
        Prepaid spectrum license fees    (235,479)     (64,638)   (25,040)
        Inventory                            (914)      (1,913)     6,005
        Accounts receivable                (5,387)        (686)    (4,306)
        Prepaids and other assets         (17,841)     (10,687)    (4,445)
        Accounts payable                   11,198          389     14,027
        Accrued expenses and other
         liabilities                       64,619       61,447     35,309
        Due to affiliate                     (530)         184     (7,130)
                                      ------------ ------------ ----------
         Net cash used in operating
          activities                     (522,135)    (233,154)   (96,655)
                                      ------------ ------------ ----------
    CASH FLOWS FROM INVESTING
     ACTIVITIES:
     Purchase of property, plant and
      equipment                          (361,861)    (191,747)  (132,724)
     Payments for acquisitions of
      spectrum licenses and other        (222,920)     (67,665)   (24,279)
     Purchases of short-term
      investments                      (1,294,484)  (1,143,079)  (368,160)
     Sales or maturities of short-term
      investments                       1,760,246      575,845    350,429
     Investments in equity investees       (5,293)      (2,161)   (13,737)
     Issuance of notes receivable,
      related party                        (2,000)      (4,105)        --
     Restricted cash                       (1,836)      (1,830)    (3,704)
     Restricted investments                85,670      (30,324)   (55,346)
     Business acquisitions, net of
      cash acquired                        (7,066)     (49,576)   (27,779)
     Proceeds from sale of business,
      net of cash                               -       47,085         --
     Proceeds from sale of equity
      investment and other assets           3,250           --         --
                                      ------------ ------------ ----------
        Net cash used in investing
         activities                       (46,294)    (867,557)  (275,300)
                                      ------------ ------------ ----------
    CASH FLOWS FROM FINANCING
     ACTIVITIES:
     Proceeds from issuance of common
      stock for IPO and other, net        556,005    1,030,683    139,609
     Proceeds from issuance of common
      stock for option and warrant
      exercises                             4,849           --         --
     Proceeds from issuance of debt     1,250,000      495,350    260,346
     Financing fees                       (69,462)     (21,820)   (10,774)
     Principal payments on long-term
      debt                               (748,821)          --         --
     Contributions from minority
      interests                            15,000           --         --
                                      ------------ ------------ ----------
        Net cash provided by financing
         activities                     1,007,571    1,504,213    389,181
                                      ------------ ------------ ----------
    Effect of foreign currency
     exchange rates on cash and cash
     equivalents                             (420)       5,340       (636)
                                      ------------ ------------ ----------
    Net increase in cash and cash
     equivalents                          438,722      408,842     16,590
    CASH AND CASH EQUIVALENTS:
     Beginning of period                  438,030       29,188     12,598
                                      ------------ ------------ ----------
     End of period                    $   876,752  $   438,030  $  29,188
                                      ============ ============ ==========
    

    Definition of Terms and Reconciliation of Non-GAAP Financial Measures

    The company utilizes certain financial measures which are widely used in the telecommunications industry and are not calculated based on accounting principles generally accepted in the United States of America (GAAP). Certain of these financial measures are considered non-GAAP financial measures within the meaning of Item 10 of Regulation S-K promulgated by the SEC.

    (1) EBITDA and Adjusted EBITDA are non-GAAP financial measures. EBITDA is defined as consolidated operating loss less depreciation and amortization. Adjusted EBITDA is defined as consolidated operating loss less depreciation and amortization less non-cash expenses including share-based compensation expense, non-cash tower rent expense and non-cash spectrum lease expense.

    
     (in thousands)               Three Months Ended  Twelve Months Ended
                                     December 31st        December 31st
                                     2007     2006       2007      2006
                                  ------------------- --------------------
    
     Operating Loss               $(159,981)$(88,650) $(499,015)$(238,115)
      Depreciation and
       Amortization                   26,136   14,530     84,694    40,902
                                  ------------------- --------------------
     EBITDA Loss                   (133,845) (74,120)  (414,321) (197,213)
      Non-Cash Items
       Share-Based Compensation       14,171    5,880     42,771    14,246
       Non-Cash Tower/Office
        Rent Expense                   6,941    1,598     18,186     5,407
       Non-Cash Spectrum Lease
        Expense                       29,601    4,627     64,357    13,338
                                  ------------------- --------------------
      Non-Cash                        50,713   12,105    125,314    32,991
    
     Adjusted EBITDA               $(83,132)$(62,015) $(289,007)$(164,222)
                                  =================== ====================
    

    In a capital-intensive industry, management believes Adjusted EBITDA, as well as the associated percentage margin calculation, to be meaningful measures of the company's operating performance. We use Adjusted EBITDA as a supplemental performance measure because management believes it facilitates comparisons of the company's operating performance from period to period and comparisons of the company's operating performance to that of other companies by backing out potential differences caused by non-cash items such as share-based compensation and non-cash expenses related to long-term leases. Because Adjusted EBITDA facilitates internal comparisons of our historical operating performance, management also uses Adjusted EBITDA for business planning purposes and in measuring our performance relative to that of our competitors. In addition, we believe that Adjusted EBITDA and similar measures are widely used by investors, financial analysts and credit rating agencies as a measure of our financial performance over time and to compare our financial performance with that of other companies in our industry.

    (2) ARPU (Average Revenue per User) is service revenue, less legacy businesses revenue (businesses that were acquired through the acquisition of spectrum entities) and CPE (Customer Premise Equipment) revenue divided by the average number of subscribers in the period divided by the number of months in the period.

    (in thousands)                      Three Months      Twelve Months
                                        Ended December    Ended December
                                             31st              31st
                                         2007    2006     2007     2006
                                       ---------------- ------------------
    ARPU
    Service Revenue                    $45,384 $23,743  $151,440 $ 67,598
     Legacy Business Revenue            (4,397) (3,472)  (15,769) (11,773)
     CPE Revenue                          (751)   (356)   (2,507)    (723)
                                       ---------------- ------------------
    ARPU Revenue                        40,236  19,915   133,164   55,102
    
    Average Customers                      372     182       301      131
     Months in Period                        3       3        12       12
    ARPU                               $ 36.09 $ 36.39  $  36.81 $  35.06
                                       ================ ==================
    

    Management uses ARPU to identify average revenue per customer, to track changes in average customer revenues over time, to help evaluate how changes in our business, including changes in our service offerings and fees affect average revenue per customer, and to assist in forecasting future service revenue. In addition, ARPU provides management with a useful measure to compare our customer revenue to that of other wireless communications providers. We believe investors use ARPU primarily as a tool to track changes in our average revenue per customer and to compare our per customer service revenues to those of other wireless communications providers. Other companies may calculate this measure differently.

    (3) Churn, which measures customer turnover, is calculated as the number of subscribers that terminate service in a given month divided by the average number of subscribers in that month. Subscribers that discontinue service in the first 30 days of service for any reason, or in the first 90 days of service under certain circumstances, are deducted from our gross customer additions and therefore not included in the churn calculation.

    Management uses churn to measure retention of our subscribers, to measure changes in customer retention over time, and to help evaluate how changes in our business affect customer retention. We believe investors use churn primarily as a tool to track changes in our customer retention. Other companies may calculate this measure differently.

    (4) CPGA (Cost per Gross Addition) is selling, general and administrative costs less general and administrative costs divided by gross customer additions in the period.

    (in thousands)                 Three Months Ended Twelve Months Ended
                                      December 31st       December 31st
                                     2007     2006       2007      2006
                                   ------------------ --------------------
    CPGA
     Selling, General and
      Administrative               $101,210 $ 72,137  $ 360,666 $ 214,669
     G&A and Other                  (66,061) (44,181)  (244,243) (137,779)
                                   ------------------ --------------------
     Total Selling Expense           35,149   27,956    116,423    76,890
    
     Total Gross Adds                    74       54        265       174
     Total CPGA                    $    477 $    515  $     440 $     441
                                   ================== ====================
    

    Management uses CPGA to measure the efficiency of our customer acquisition efforts, to track changes in our average cost of acquiring new subscribers over time, and to help evaluate how changes in our sales and distribution strategies affect the cost-efficiency of our customer acquisition efforts. We believe investors use CPGA primarily as a tool to track changes in our average cost of acquiring new subscribers. Other companies may calculate this measure differently.

    (5) Market EBITDA is defined as the EBITDA (see definition (1) EBITDA and Adjusted EBITDA) in the Initial Markets. This calculation does not include an allocation of corporate general and administrative expenses or spectrum lease expense.

    CONTACT: Clearwire
    Investor Relations
    Hope Cochran, 425-216-7974
    hope.cochran@clearwire.com
    or
    Media Relations
    Susan Johnston, 425-216-7913
    susan.johnston@clearwire.com

    SOURCE: Clearwire Corporation