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Clearwire Reports Second Quarter 2007 Results

Service Revenue More Than Doubles in Second Quarter 2007 as
Compared to Second Quarter 2006, with Total Subscriber Count Reaching
299,000 Subscribers, up from 130,000 at Same Time Last Year

Initial 25 Markets Turn Cash Flow Positive as a Group with 14
Markets Now Cash Flow Positive

Expansion Continues with High-Speed Internet Service Launched in
Five New Markets and Coverage Increased by an Additional 1.5 Million
People; Residential Voice Services Now Offered in 28 Markets, up from
17 in Prior Quarter

KIRKLAND, Wash.--(BUSINESS WIRE)--Aug. 6, 2007--Clearwire Corporation (NASDAQ: CLWR), a leading provider of wireless high-speed Internet service, today reported financial and operating results for the second quarter 2007.

Clearwire reported approximately 41,000 net subscriber additions for the quarter ended June 30, 2007. The increase brings the total subscriber base to 299,000, a 130 percent increase over the subscriber base at the end of the second quarter of 2006, and a 16 percent sequential quarter increase. Clearwire ended the quarter with approximately 11.6 million people covered by its network in 43 domestic and international markets compared with 29 markets and 5.8 million people covered by Clearwire's network in the second quarter of 2006. During the quarter, Clearwire launched 5 new markets including Richmond, Va., Wenatchee, Wash., Lubbock and Longview, Texas and Ghent, Belgium and increased its network coverage by approximately 1.5 million people.

On a consolidated basis, Clearwire's second-quarter service revenue more than doubled to $35.5 million from $15.4 million in the same quarter of 2006. The robust growth in revenue was driven by the strong increase of the company's subscriber base when compared to the same period in 2006. Clearwire revenues were further buoyed by strong Average Revenue per User, or ARPU, resulting from maturation of existing markets, expanded availability of its residential voice service, and several one-time items. Clearwire's gross margins related to service revenue improved for the quarter to $12.2 million or 34 percent, up from $3.5 million or 23 percent in the same quarter in 2006. On a sequential quarter basis, gross margins were lower as expected due to the impact of new market launches that occurred in the second quarter and that are expected to occur in the second half of the year.

Clearwire reported an Adjusted EBITDA loss of $70.2 million in the second quarter of 2007 compared with an Adjusted EBITDA loss of $45.9 million in the second quarter of 2006, driven primarily by its continued investment in the construction and deployment of wireless networks in new markets and subscriber acquisition costs. Cost per Gross Addition, or CPGA, climbed during the quarter due to the effects of new market launches and the seasonal nature of the business.

Consolidated service revenue for the six months ended June 30, 2007, was $64.8 million, an increase of over 160 percent from $24.9 million in the same period last year. The rapid revenue growth was fueled by continued strong subscriber growth. Consolidated service gross margin for the six-month period was $24.7 million or 38 percent, up from $4.3 million or 17 percent for the same period in 2006. Adjusted EBITDA loss for the same period was $121.7 million compared to $78.9 million for the six months ended June 30, 2006, reflecting the substantial increase in the company's investment in new market development and customer acquisition costs, year over year.

"We are pleased that both aspects of Clearwire's business -- new market development and construction on the one hand, and high-speed Internet and voice services on the other -- met our expectations for the first half of the year. Our wireless network covered approximately 11.6 million people at the end of the first half, and we had markets covering an additional 20 million people under various stages of development. On the operations side, we increased our subscriber base to just under 300,000 and turned our initial 25 markets Market EBITDA positive, demonstrating continuing robust demand for our services and the financial health of our business," said Ben Wolff, Clearwire's chief executive officer.

                        Clearwire Corporation
             Summary of Income Statement Data (unaudited)
                 In thousands, unless otherwise noted

                         Three Months Ended      Six Months Ended
                              June 30th               June 30th
REVENUE                    2007       2006         2007       2006
                         ---------- ----------  ----------- ----------
   Service               $ 35,484   $ 15,352    $  64,759   $ 24,893
   Equipment                    -     11,439            -     24,646
                         ---------- ----------  ----------- ----------
Total Revenue              35,484     26,791       64,759     49,539

   Cost of Service         23,313     11,890       40,048     20,612
   Cost of Equipment            -      9,218            -     14,358
                         ---------- ----------  ----------- ----------
Gross Margin               12,171      5,683       24,711     14,569
Gross Margin %                 34%        21%          38%        29%

Selling, General and
 Administrative            87,375     49,762      156,032     90,366
Research and Development      578      3,212        1,023      5,867
Spectrum Lease Expense     14,823      4,644       28,265      7,988
                         ---------- ----------  ----------- ----------
EBITDA Loss               (90,605)   (51,935)    (160,609)   (89,652)

Adjustment for Non-Cash
 Items                     20,398      6,021       38,868     10,704
                         ---------- ----------  ----------- ----------
Adjusted EBITDA Loss     $(70,207)  $(45,914)   $(121,741)  $(78,948)

KEY OPERATING METRICS (k for '000's, MM for
 '000,000's)
   Net Subscriber
    Additions                  41k        30k          93k        67k
   Total Subscribers          299k       130k         299k       130k
   ARPU                  $  37.93   $  34.35    $   36.96   $  33.53
   Churn                      2.0%       1.6%         1.8%       1.6%
   CPGA                  $    471   $    441    $     404   $    398
   Capital Expenditures  $   90.2MM $   53.8MM  $   164.6MM $   83.3MM
   Covered POPS              11.6MM      5.8MM       11.6MM      5.8MM
   Cash & Short Term
    Investments          $  1,056MM $    182MM  $   1,056MM $    182MM

For a definition and reconciliation of non-GAAP financial measures, including Adjusted EBITDA, ARPU, Churn, CPGA 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.

Clearwire's Initial 25 U.S. Operating Markets Continue to Demonstrate Solid Financial Results and as a Group Turn Market EBITDA Positive

During the second quarter Clearwire's initial 25 U.S. markets, all of which commenced operations prior to 2006, more than doubled their revenue base to $21.2 million compared to $10.2 million in the same period in 2006. Gross margin continued to expand to 76 percent of revenue in the quarter as the Initial Markets continued to scale. Perhaps more importantly, as a group, the Initial Markets turned cash flow positive, defined as Market EBITDA, in the second quarter, with 14 of the Initial Markets now Market EBITDA positive, up from 10 markets in the first quarter of 2007 and zero markets as of the second quarter 2006. The Initial Markets generated a Market EBITDA margin for the quarter of 5 percent compared with a negative 73 percent in the same quarter last year.

For the six-month period ended June 30, 2007, service revenue in the Initial Markets increased over 128 percent to $39.3 million from $17.2 million in the same period in 2006. In addition gross margin in the Initial Markets for the six months was 74 percent, up from a gross margin of 59 percent for the same six-month period in 2006. The additional market maturity and focus on cost containment helped to drive positive Market EBITDA for the Initial Markets compared to a loss of $17.0 million in the first six months of 2006.

"We believe that the Initial Markets represent a key indicator of the replicable, scaleable and profitable nature of our business. We continue to focus every day on the blocking and tackling associated with our business, as evidenced by our solid results in subscriber growth, revenue growth, gross margin expansion and cash flow growth in these markets. With 14 of these markets cash flow positive and a number of additional markets poised to become cash flow positive over the next two quarters, we are proving that we can succeed in a variety of different types of markets across the country," Wolff added.

                     Initial Markets Performance
             Summary of Income Statement Data (unaudited)
                 In thousands, unless otherwise noted

                                Three Months      Six Months Ended
                               Ended June 30th         June 30th
                                2007      2006      2007      2006
                              --------- --------- --------- ----------
  Total Revenue               $21,235   $10,225   $39,311   $ 17,158

  Gross Margin                $16,048   $ 6,709   $29,143   $ 10,055
  Gross Margin %                   76%       66%       74%        59%

  Market EBITDA               $ 1,105   $(7,447)  $   506   $(16,991)
  EBITDA %                          5%      -73%        1%       -99%

KEY OPERATING METRICS (k for
 '000's, MM for '000,000's)
  Total Subscribers               192k      108k      192k       108k
  ARPU                        $ 37.99   $ 34.77   $ 37.15   $  33.81
  Churn                           1.8%      1.7%      1.7%       1.5%
  CPGA                        $   400   $   436   $   355   $    398
  Covered POPS                    4.2MM     3.9MM     4.2MM      3.9MM
  Number of EBITDA positive
   markets                         14         0        14          0

Strategic Initiatives and New Financing a Key Focus in the Second Quarter

As previously announced, Clearwire recently entered into a non-binding letter of intent with Sprint Nextel Corporation to form a partnership for the construction and operation of a nationwide mobile WiMAX network. Today, Clearwire distributed a map that identifies the areas of the country that it expects to focus on for purposes of building and operating its portion of the nationwide WiMAX network, assuming that the transaction with Sprint Nextel is completed. While the company continues to evaluate the specific geographic areas it will develop and on what timeline, Clearwire's operating regions are expected to include approximately 75 percent of the land mass of the United States and approximately 40 percent of the population, including central and northern California, the Pacific Northwest, the Rocky Mountain Region, portions of the Midwest, most of the South, Alaska, Hawaii and portions of New York, Pennsylvania, and Texas. Sprint Nextel will assume responsibility for the remaining portions of the country. As part of the Sprint transaction, Clearwire anticipates transferring the subscribers and assets in three of its operating markets in the eastern U.S. to Sprint, as well as the assets in several markets near completion or under development. Similarly, Sprint is expected to transfer to Clearwire, at the close of the transaction, several markets in various stages of development. As a result, Clearwire management expects its network to cover between 13-15 million people by the end of 2007, a slight decrease from the 16-18 million people that management had previously expected to cover prior to the Sprint Nextel transaction. Management continues to expect to end the year with between 375,000 to 400,000 subscribers in its U.S. and international markets, subject to further changes that might result from the Sprint Nextel transaction if it is consummated. Further details regarding changes in the Clearwire business plan and market roll out schedule will be disclosed as definitive agreements with Sprint Nextel are finalized.

The company also announced during the quarter strategic distribution agreements with EchoStar and DirecTV aimed at delivering enhanced services to Clearwire's customers as well as broadening Clearwire's distribution channels. The agreements with EchoStar and DirecTV enable both companies to offer Clearwire's high-speed Internet service to their subscribers in all of Clearwire's existing and new markets across the country. The agreements also provide Clearwire with the opportunity to offer the video services of one or both satellite companies to its customers.

In July, Clearwire entered into a new $1 billion Term Loan financing, which simplifies the company's debt structure, extends maturities significantly and adds incremental capital for market expansion and operations. Clearwire ended the quarter with approximately $1.1 billion in cash and short term investments, not including the additional proceeds from the Term Loan which will be reflected in the company's third quarter financials.

Management Webcast

Clearwire's senior leadership team will discuss the company's second-quarter performance during a conference call on Monday, August 6, 2007, at 5 p.m. EDT (2 p.m. Pacific Time). Interested parties can access the conference call by dialing 800-299-7928 or, outside the United States, 617-614-3926, five minutes prior to the start time. The passcode for the call is 73840545. A replay of the call will be available beginning at approximately 7 p.m. EDT on Monday, August 6, until midnight EDT Monday, August 20, 2007, by calling 888-286-8010, or outside the United States, 617-801-6888. The passcode for the replay is 99094763. The conference call will be simultaneously web-cast in the Investor Relations section of the company's Website: www.clearwire.com.

About Clearwire

Clearwire, founded in October 2003 by Craig O. McCaw, is a provider of simple, portable and reliable wireless high-speed Internet service. Headquartered in Kirkland, Wash., the company launched its first market in August 2004 and now offers service in 43 markets in more than 425 municipalities in 15 states across the U.S. Clearwire's international markets include Ireland and Belgium, and the company also offers wireless high-speed Internet services in Mexico and Denmark through its partners, MVS Net and Danske Telecom. 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 may be unable to finalize and enter into a definitive
        agreement with Sprint Nextel, or to satisfy the conditions
        thereunder, including obtaining approvals from the FCC and
        Department of Justice.

    --  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 May 15, 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)

                                               June 30,   December 31,
                                                 2007         2006
                                              ----------- ------------
ASSETS
CURRENT ASSETS:
  Cash and cash equivalents                   $  380,038  $   438,030
  Short-term investments                         676,265      663,644
  Restricted cash                                 11,657       10,727
  Restricted investments                          51,941       69,401
  Accounts receivable, net of allowance of
   $2,047 and $753                                 3,498        2,774
  Notes receivable, related party                  4,205        4,409
  Inventory                                        1,671        1,398
  Prepaids and other assets                       30,627       19,219
                                              ----------- ------------
     Total current assets                      1,159,902    1,209,602
  Property, plant and equipment, net             427,618      302,798
  Restricted cash                                    162          117
  Restricted investments                               -       16,269
  Prepaid spectrum license fees                  423,764      241,151
  Spectrum licenses and other intangible
   assets, net                                   432,208      222,980
  Goodwill                                        31,576       30,908
  Investments in equity investees                 16,274       14,983
  Other assets                                    27,224       29,565
                                              ----------- ------------
TOTAL ASSETS                                  $2,518,728  $ 2,068,373
                                              =========== ============

LIABILITIES AND STOCKHOLDERS' EQUITY
CURRENT LIABILITIES:
  Accounts payable and accrued expenses
   (includes related party
   balances of $7,936 and $6,799)             $  126,638  $   108,216
  Deferred rent                                   10,317        6,986
  Deferred revenue                                 8,016        5,599
  Due to affiliate                                   128          532
  Current portion of long-term debt                1,250        1,250
                                              ----------- ------------
      Total current liabilities                  146,349      122,583
  Long-term debt, net of discount of $98,855
   and $110,007                                  654,653      644,438
  Other long-term liabilities                     56,606       42,385
                                              ----------- ------------
      Total liabilities                          857,608      809,406
MINORITY INTEREST                                 14,109        1,358
COMMITMENTS AND CONTINGENCIES
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, 134,837,250
       and 109,325,236 shares issued and
       outstanding                             2,072,163    1,474,759
      Class B, 28,596,685 shares issued and
       outstanding                               234,376      234,376
  Common stock and warrants payable                   12          166
  Deferred compensation                             (697)        (116)
  Accumulated other comprehensive income          10,443        6,990
  Accumulated deficit                           (669,286)    (458,566)
                                              ----------- ------------
      Total stockholders' equity               1,647,011    1,257,609
                                              ----------- ------------
Total Liabilities and Stockholders' Equity    $2,518,728  $ 2,068,373
                                              ===========-============
                CLEARWIRE CORPORATION AND SUBSIDIARIES
                CONSOLIDATED STATEMENTS OF OPERATIONS
                (In thousands, except per share data)
                             (unaudited)

                            Three Months Ended   Six Months Ended June
                                  June 30,                30,
                               2007      2006       2007       2006
                            ---------- --------- ---------- ----------
REVENUES:
  Service                   $  35,484  $ 15,352  $  64,759  $  24,893
  Equipment and other
   (includes related party
   sales of $0, $4,650, $0
   and $12,268)                     -    11,439          -     24,646
                            ---------- --------- ---------- ----------
      Total revenues           35,484    26,791     64,759     49,539
OPERATING EXPENSES:
  Cost of goods and services
   (exclusive of items shown
   separately below):
    Cost of service
     (includes related party
     costs of $662, $0,
     $1,390 and $0)            23,313    11,890     40,048     20,612
    Cost of equipment
     (includes related party
     costs of $0, $4,302, $0
     and $6,692 )                   -     9,218          -     14,358
  Selling, general and
   administrative expense      87,375    49,762    156,032     90,366
  Research and development        578     3,212      1,023      5,867
  Depreciation and
   amortization                19,714     9,401     35,899     16,834
  Spectrum lease expense       14,823     4,644     28,265      7,988
                            ---------- --------- ---------- ----------
      Total operating
       expenses               145,803    88,127    261,267    156,025
                            ---------- --------- ---------- ----------
OPERATING LOSS               (110,319)  (61,336)  (196,508)  (106,486)
OTHER INCOME (EXPENSE):
  Interest income              18,820     3,824     35,410      6,886
  Interest expense            (23,511)  (19,340)   (47,729)   (30,429)
  Foreign currency
   transaction gains
   (losses), net                 (101)        6        (68)         -
  Other income (expense),
   net                           (734)    2,296      1,744      2,247
                            ---------- --------- ---------- ----------
      Total other expense,
       net                     (5,526)  (13,214)   (10,643)   (21,296)
LOSS BEFORE INCOME TAXES,
 MINORITY INTEREST AND
 LOSSES FROM EQUITY
 INVESTEES                   (115,845)  (74,550)  (207,151)  (127,782)
  Income tax provision         (2,126)     (763)    (2,729)    (1,227)
                            ---------- --------- ---------- ----------
LOSS BEFORE MINORITY
 INTEREST AND LOSSES FROM
 EQUITY INVESTEES            (117,971)  (75,313)  (209,880)  (129,009)
  Losses from equity
   investees, net              (1,189)   (1,742)    (2,807)    (3,715)
  Minority interest in net
   loss of consolidated
   subsidiaries                 1,075       246      1,967        636
                            ---------- --------- ---------- ----------
NET LOSS                    $(118,085) $(76,809) $(210,720) $(132,088)
                            ========== ========= ========== ==========

Net loss per common share,
 basic and diluted          $   (0.72) $  (1.01) $   (1.37) $   (1.74)
                            ========== ========= ========== ==========
Weighted average common
 shares outstanding, basic
 and diluted                  163,276    76,372    153,561     76,061
                            ========== ========= ========== ==========
                CLEARWIRE CORPORATION AND SUBSIDIARIES
                CONSOLIDATED STATEMENTS OF CASH FLOWS
                            (In thousands)
                             (unaudited)

                                                  Six months ended
                                                      June 30,
                                                   2007        2006
                                               ------------ ----------
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss                                       $  (210,720) $(132,088)
  Adjustments to reconcile net loss to net cash
   used in operating activities:
    Allowance for doubtful accounts                  2,120        333
    Depreciation and amortization                   35,899     16,833
    Amortization of prepaid license fees             5,347      2,625
    Amortization of deferred financing costs
     and accretion of debt discount                 14,409      6,807
    Deferred income taxes                            2,702      1,227
    Share-based compensation                        18,202      3,979
    Minority interest                               (1,967)      (636)
    Losses from equity investees, net                2,807      3,715
    Gain on other asset disposals                       (5)    (1,891)
    Gain on sale of equity investment               (2,213)         -
  Changes in assets and liabilities, net of
   effects from acquisitions:
    Prepaid spectrum license fees                 (172,272)   (12,232)
    Inventory                                         (273)     7,365
    Accounts receivable                             (2,609)     7,168
    Prepaids and other assets                      (12,262)    (1,427)
    Accounts payable                                20,864     (9,009)
    Accrued expenses and other liabilities          19,736     35,380
    Due to affiliate                                  (404)      (108)
    Net assets held for sale                             -     (7,278)
                                               ------------ ----------
      Net cash used in operating activities       (280,639)   (79,237)
CASH FLOWS FROM INVESTING ACTIVITIES:
  Purchase of property, plant and equipment       (164,604)   (83,230)
  Payments for acquisitions of spectrum
   licenses and other                             (194,830)   (27,671)
  Purchases of short-term investments           (1,064,121)  (243,550)
  Sales or maturities of short-term investments  1,051,358    173,431
  Investments in equity investees                   (5,293)    (2,161)
  Issuance of notes receivable, related party            -     (2,038)
  Restricted cash                                     (975)      (561)
  Restricted investments                            33,729    (60,918)
  Business acquisitions, net of cash acquired       (7,067)   (44,806)
  Proceeds from sale of equity investment            2,250          -
                                               ------------ ----------

      Net cash used in investing activities       (349,553)  (291,504)
CASH FLOWS FROM FINANCING ACTIVITIES:
  Proceeds from issuance of common stock for
   IPO, net                                        556,005          -
  Proceeds from issuance of common stock for
   option and warrant exercises                      2,182          -
  Proceeds from issuance of senior debt and
   warrants                                              -    370,350
  Deferred financing fees                                -    (16,100)
  Principal payments on long-term debt                (937)         -
  Contributions from minority interests             15,000          -
                                               ------------ ----------
      Net cash provided by financing activities    572,250    354,250
Effect of foreign currency exchange rates on
 cash and cash equivalents                             (50)     2,309
                                               ------------ ----------
Net decrease in cash and cash equivalents          (57,992)   (14,182)
CASH AND CASH EQUIVALENTS:
  Beginning of period                              438,030     29,188
                                               ------------ ----------
  End of period                                $   380,038  $  15,006
                                               ============ ==========

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    Six Months Ended June
                                 June 30th                30th
                              2007      2006        2007       2006
                           ---------- ---------  ---------- ----------

Operating Loss             $(110,319) $(61,336)  $(196,508) $(106,486)
    Depreciation and
     Amortization             19,714     9,401      35,899     16,834
                           ---------- ---------  ---------- ----------
EBITDA Loss                  (90,605)  (51,935)   (160,609)   (89,652)
    Non-Cash Items
      Share-Based
       Compensation           10,333     2,296      18,202      3,979
      Non-Cash Tower Rent
       Expense                 2,885     1,503       5,686      2,463
      Non-Cash Spectrum
       Lease Expense           7,180     2,222      14,980      4,262
                           ---------- ---------  ---------- ----------
  Non-Cash                    20,398     6,021      38,868     10,704

Adjusted EBITDA            $ (70,207) $(45,914)  $(121,741) $ (78,948)
                           ========== =========  ========== ==========

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     Six Months Ended
                                   Ended June 30th       June 30th
                                    2007     2006      2007     2006
                                  -------- --------  -------- --------
ARPU
Service Revenue                   $35,484  $15,352   $64,759  $24,893
   Legacy Business Revenue        $(3,276)  (3,392)   (6,938)  (5,028)
   CPE Revenue                    $  (517)    (146)   (1,070)    (174)
                                  -------- --------  -------- --------
                                  $31,691   11,814    56,751   19,691

Average Customers                     279      115       256       98
   Months in Period                     3        3         6        6
ARPU                              $ 37.93  $ 34.35   $ 36.96  $ 33.53
                                  ======== ========  ======== ========

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 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   Six Months Ended
                                    June 30th           June 30th
                                 2007     2006        2007     2006
                               ------------------  -------------------
CPGA
  Selling, General and
   Administrative              $ 87,375 $ 49,762   $ 156,032 $ 90,366
  General and Administrative    (60,302) (34,144)   (107,352) (59,912)
                               ------------------  -------------------
  Total Selling Expense          27,073   15,618      48,680   30,454

  Total Gross Adds                   57       35         120       76
  Total CPGA                   $    471 $    441   $     404 $    398
                               ==================  ===================

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 Contact:
Dan Evans, 425-216-4879
dan.evans@clearwire.com
or
Media Contact:
Helen Chung, 425-216-4551
helen.chung@clearwire.com

SOURCE: Clearwire Corporation