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Clearwire Reports Third Quarter 2007 Results

Clearwire Adds 49,000 Net New Subscribers to End the Third Quarter 2007 with 348,000 Subscribers, up from 162,000 at the End of Third Quarter 2006. Service Revenue Increases over 117% Relative to Same Quarter in the Prior Year

20 Markets are Now Market EBITDA Positive, up from 14 in Second Quarter 2007, with Market EBITDA for the Initial Markets Increasing by More Than 100%

Pops Covered by Clearwire's Wireless Broadband Network Increase by 28% During Quarter with High-Speed Internet Service Launched in Five New Markets, Covering An Additional 3.2 Million People

KIRKLAND, Wash.--(BUSINESS WIRE)--Nov. 9, 2007--Clearwire Corporation (NASDAQ:CLWR), a leading provider of wireless high-speed Internet service, today reported financial and operating results for the third quarter 2007.

Clearwire reported approximately 49,000 net subscriber additions for the quarter ended September 30, 2007. The increase brings the total subscriber base to approximately 348,000, a 115 percent increase over the end of the third quarter of 2006, and a 16 percent increase over the second quarter 2007. Churn for the quarter was 2.3 percent, consistent with the seasonal trends historically experienced by the Company, but an improvement over the churn rate in the same quarter last year. Clearwire ended the third quarter with approximately 14.8 million people covered by its network in 48 domestic and international markets, compared with 34 markets and 6.6 million people covered by Clearwire's network at the end of the third quarter of 2006. During the quarter, Clearwire launched five new markets including Corpus Christi, Texas; Syracuse, N.Y.; Dayton, Ohio; Nashville, Tenn.; and Seville, Spain, increasing its network coverage by approximately 3.2 million people over the second quarter of 2007.

On a consolidated basis, Clearwire's third-quarter service revenue more than doubled to $41.3 million from $19.0 million in the same quarter of 2006. The robust growth in revenue was driven by the continued expansion of its subscriber base. Growth of its residential voice service, now available in 37 markets, drove an increase in Average Revenue per User, or ARPU, for the quarter over the same quarter in the prior year. Clearwire's gross margin related to service revenue for the quarter was $12.0 million compared to $5.6 million in the same quarter in 2006. Gross margin percent was flat year over year due to the substantial growth in covered POPs during the third quarter and anticipated launches in the fourth quarter.

Clearwire reported an Adjusted EBITDA loss of $84.1 million in the third quarter of 2007 compared with an Adjusted EBITDA loss of $23.3 million in the third quarter of 2006. The expanding losses were driven primarily by Clearwire's ongoing investment in the construction and deployment of wireless networks in new markets, associated market launch costs and increased total subscriber acquisition costs related to the additional markets.

The Net Loss for the quarter increased significantly primarily due to a one-time $159.2 million charge related to the refinancing of the Company's senior debt during the quarter. The original $620.7 million in senior notes was recorded initially at a discount to face value due to the significant value ascribed to the warrants attached to the notes. At the time the notes were refinanced with the $1.0 billion credit facility, the remaining discount was recognized as a loss on extinguishment of debt. The Net Loss was further widened by $14.2 million in realized investment losses due to other-than-temporary impairments in Clearwire's investment portfolio due primarily to exposure in auction rate securities.

Consolidated service revenue for the nine months ended September 30, 2007, was $106.1 million, an increase of 142 percent from $43.9 million in the same period last year. The robust market expansion and resulting growth of Clearwire's customer base year over year contributed to the increase in revenue. Consolidated service gross margin for the nine-month period was $36.7 million, or 35 percent, up from $9.9 million, or 23 percent, for the same period in 2006. The Adjusted EBITDA loss for the same period was $205.9 million compared to $102.2 million for the nine months ended September 30, 2006, driven primarily by the substantial increase in the market start-up costs and costs of acquiring new customers as the company entered 14 new markets year over year.

"Our business continues to deliver results that are both consistent with our plan and that are firsts in our industry. We delivered five new market launches and expanded our existing footprint to cover an additional 3.2 million people. We turned six more markets EBITDA positive, bringing 80 percent of our markets to cash flow positive status at the market level. And we hit our stride with the sale of our VoIP services, and the recent launch of our True Broadband (TM) pc card -- all while adding approximately 49,000 new subscribers, reducing churn from the prior year and increasing ARPU," said Ben Wolff, Clearwire's chief executive officer.

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

                             Three Months Ended    Nine Months Ended
                               September 30th       September 30th
REVENUE                        2007      2006       2007       2006
                            ---------- --------- ---------- ----------
  Service                   $   41,297 $  18,962 $  106,056 $   43,855
  Equipment                          -     7,937          -     32,583
                            ------------------------------------------
Total Revenue                   41,297    26,899    106,056     76,438

  Cost of Service               29,268    13,387     69,316     33,999
  Cost of Equipment                  -     5,316          -     19,674
                            ------------------------------------------
Gross Margin                    12,029     8,196     36,740     22,765
Gross Margin %                     29%       30%        35%        30%

Selling, General and
 Administrative                103,424    52,166    259,456    142,532
Research and Development           194     2,603      1,217      8,470
Spectrum Lease Expense          28,278     6,661     56,543     14,649
Gain on sale of NextNet              -  (19,793)          -   (19,793)
                            ------------------------------------------
EBITDA Loss                  (119,867)  (33,441)  (280,476)  (123,093)

Adjustment for Non-Cash
 Items                          35,733    10,182     74,601     20,886
                            ------------------------------------------
Adjusted EBITDA Loss        $ (84,134) $(23,259) $(205,875) $(102,207)

KEY OPERATING METRICS (k
 for '000's, MM for
 '000,000's)
  Net Subscriber Additions         49k       33k       141k       100k
  Total Subscribers               348k      162k       348k       162k
  ARPU                      $    37.41 $   35.46 $    37.13 $    34.35
  Churn                           2.3%      2.4%       2.0%       1.9%
  CPGA                      $      462 $     426 $      426 $      408
  Capital Expenditures      $  114.6MM $  45.7MM $  279.2MM $  129.0MM
  Covered POPS                  14.8MM     6.6MM     14.8MM      6.6MM
  Cash & Short Term
   Investments              $  1,017MM $ 1,251MM $  1,017MM $  1,251MM

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.

Eighty Percent of Clearwire's Initial 25 U.S. Operating Markets are Market EBITDA Positive. Market EBITDA Margin Doubles over Second Quarter 2007

Clearwire's initial 25 U.S. markets, or Initial Markets, all of which commenced operations prior to 2006, increased revenue by 75 percent to $22.7 million in the quarter, compared to $13.0 million in the same period in 2006. Gross margin for the period was 74 percent of revenue up from 65 percent in the third quarter 2006. In the third quarter, 20 of the Initial Markets were Market EBITDA positive, up from one market in the third quarter of 2006 and 14 markets in the second quarter 2007. The Initial Markets generated a Market EBITDA margin for the quarter of 10 percent compared with a negative 42 percent in the same quarter last year.

For the nine-month period ended September 30, 2007, service revenue in the Initial Markets increased 106 percent to $62.0 million from $30.1 million in the same period in 2006. In addition, gross margin in the Initial Markets for the nine months was 74 percent, up from a gross margin of 62 percent for the same nine-month period in 2006. Clearwire believes its consistent focus on driving economies of scale and cost containment helped to drive positive Market EBITDA of $2.7 million for the nine month period in 2007 compared to a loss of $22.4 million in the first nine months of 2006.

"The Initial Markets continue to deliver excellent operating and financial results that underscore the long-term potential of our business. We believe that our Initial Markets clearly demonstrate the scaling opportunities in our business as almost $0.75 of each dollar of incremental revenue over the second quarter 2007 dropped to the Market EBITDA line of the income statement," Wolff added.

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

                              Three Months Ended   Nine Months Ended
                                September 30th       September 30th
                                 2007      2006      2007      2006
                              ---------- -------- ---------- ---------
  Total Revenue               $   22,728 $ 12,978 $   62,039 $  30,136

  Gross Margin                $   16,855 $  8,486 $   45,998 $  18,541
  Gross Margin %                     74%      65%        74%       62%

  Market EBITDA               $    2,217 $(5,439) $    2,723 $(22,429)
  EBITDA %                           10%     -42%         4%      -74%

KEY OPERATING METRICS (k for
 '000's, MM for '000,000's)
  Total Subscribers                 206k     130k       206k      130k
  ARPU                        $    37.64 $  35.86 $    37.33 $   34.67
  Churn                             2.2%     2.1%       1.9%      1.8%
  CPGA                        $      391 $    417 $      367 $     404
  Covered POPS                     4.3MM    4.0MM      4.3MM     4.0MM
  Number of EBITDA positive
   markets                            20        1         20         1

Strategic Initiatives

Clearwire and Sprint Nextel continue their discussions regarding how best to collaborate for the deployment of a nationwide mobile WiMAX network. Over the course of the parties' discussions, Clearwire and Sprint concluded that the joint build transaction originally contemplated by the previously announced letter of intent was likely to introduce a level of additional complexity to each party's business that would be inconsistent with each company's focus on simplicity and the customer experience. Consequently, the parties have agreed to terminate their obligations under the letter of intent, although discussions continue regarding the best means to accomplish the benefits that were expected under the letter of intent. Notwithstanding the ongoing discussions, there can be no assurance that a transaction or agreement between Clearwire and Sprint Nextel will be concluded.

Financing

Clearwire continues to tap the capital markets opportunistically. As previously announced, the company successfully completed a $250.0 million addition to its $1.0 billion senior secured credit facility on identical financial terms despite the choppy financial markets. The company expects to use the additional funds to construct its networks, launch new markets, and to opportunistically acquire additional spectrum.

Management Webcast

Clearwire's senior leadership team will discuss the company's third-quarter performance during a conference call on Friday, November 9, 2007, at 11 a.m. Eastern Time (8 a.m. Pacific Time). Interested parties can access the conference call by dialing 866-770-7125 or, outside the United States, 617-213-8066, five minutes prior to the start time. The passcode for the call is 74739728. A replay of the call will be available beginning at approximately 1 p.m. ET on Friday, November 9, until midnight ET on Friday, November 23, 2007, by calling 888-286-8010, or outside the United States, 617-801-6888. The passcode for the replay is 67992723. 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 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 and Mexico. 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 August 9, 2007. Clearwire assumes no obligation to update or supplement such forward-looking statements.

                CLEARWIRE CORPORATION AND SUBSIDIARIES
                CONDENSED CONSOLIDATED BALANCE SHEETS
           (in thousands, except share and per share data)
                             (Unaudited)

                                            September 30, December 31,
                                                2007          2006
                                            ------------- ------------
ASSETS
CURRENT ASSETS:
  Cash and cash equivalents                 $    714,283  $   438,030
  Short-term investments                         303,033      663,644
  Restricted cash                                 13,985       10,727
  Restricted investments                               -       69,401
  Accounts receivable, net of allowance of
   $1,947 and $753                                 3,498        2,774
  Notes receivable, related party                  6,557        4,409
  Inventory                                        3,749        1,398
  Prepaids and other assets                       34,727       19,219
                                            ------------- ------------
    Total current assets                       1,079,832    1,209,602
  Property, plant and equipment, net             519,366      302,798
  Restricted cash                                    182          117
  Restricted investments                               -       16,269
  Prepaid spectrum license fees                  426,960      241,151
  Spectrum licenses and other intangible
   assets, net                                   465,579      222,980
  Goodwill                                        33,424       30,908
  Investments in equity investees                 15,350       14,983
  Other assets                                    30,777       29,565
                                            ------------- ------------
TOTAL ASSETS                                $  2,571,470  $ 2,068,373
                                            ============= ============

LIABILITIES AND STOCKHOLDERS' EQUITY
CURRENT LIABILITIES:
  Accounts payable and accrued expenses     $    111,044  $   108,216
  Deferred rent                                   16,245        6,986
  Deferred revenue                                 8,801        5,599
  Due to affiliate                                    13          532
  Current portion of long-term debt               20,000        1,250
                                            ------------- ------------
    Total current liabilities                    156,103      122,583
  Long-term debt, net of discount of $0 and
   $110,007                                      990,000      644,438
  Other long-term liabilities                     87,066       42,385
                                            ------------- ------------
    Total liabilities                          1,233,169      809,406
MINORITY INTEREST                                 13,234        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, 135,514,463 and 109,325,236 shares
     issued and outstanding                    2,084,173    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           4,441        6,990
  Accumulated deficit                           (997,923)    (458,566)
                                            ------------- ------------
    Total stockholders' equity                 1,325,067    1,257,609
                                            ------------- ------------
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY  $  2,571,470  $ 2,068,373
                                            ============= ============
                CLEARWIRE CORPORATION AND SUBSIDIARIES
           CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
                (In thousands, except per share data)
                             (Unaudited)

                             Three Months Ended    Nine Months Ended
                               September 30,         September 30,
                               2007      2006       2007       2006
                            ---------- --------- ---------- ----------
REVENUES:
  Service                   $  41,297  $ 18,962  $ 106,056  $  43,855
  Equipment and other               -     7,937          -     32,583
                            ---------- --------- ---------- ----------
    Total revenues             41,297    26,899    106,056     76,438
OPERATING EXPENSES:
  Cost of goods and
   services (exclusive of
   items shown separately
   below):
    Cost of service            29,268    13,387     69,316     33,999
    Cost of equipment               -     5,316          -     19,674
  Selling, general and
   administrative expense     103,424    52,166    259,456    142,532
  Research and development        194     2,603      1,217      8,470
  Depreciation and
   amortization                22,659     9,538     58,558     26,372
  Spectrum lease expense       28,278     6,661     56,543     14,649
  Gain on sale of NextNet           -   (19,793)         -    (19,793)
                            ---------- --------- ---------- ----------
    Total operating
     expenses                 183,823    69,878    445,090    225,903
                            ---------- --------- ---------- ----------
OPERATING LOSS               (142,526)  (42,979)  (339,034)  (149,465)
OTHER INCOME (EXPENSE):
  Interest income              16,596     6,249     52,006     13,135
  Interest expense            (28,813)  (19,312)   (76,542)   (49,741)
  Foreign currency
   translation gains
   (losses), net                  292       (20)       224        (20)
  Loss on extinguishment of
   debt                      (159,193)        -   (159,193)         -
  Other-than-temporary
   impairment loss on
   investments                (14,208)        -    (14,208)         -
  Other income (expense),
   net                            453      (821)     2,197      1,426
                            ---------- --------- ---------- ----------
    Total other expense,
     net                     (184,873)  (13,904)  (195,516)   (35,200)
                            ---------- --------- ---------- ----------
LOSS BEFORE INCOME TAXES,
 MINORITY INTEREST AND
 LOSSES FROM EQUITY
 INVESTEES                   (327,399)  (56,883)  (534,550)  (184,665)
  Income tax provision         (1,198)     (648)    (3,927)    (1,875)
                            ---------- --------- ---------- ----------
LOSS BEFORE MINORITY
 INTEREST AND LOSSES FROM
 EQUITY INVESTEES            (328,597)  (57,531)  (538,477)  (186,540)
  Losses from equity
   investees, net              (1,034)   (2,042)    (3,841)    (5,757)
  Minority interest in net
   loss (income) of
   consolidated
   subsidiaries                   994      (190)     2,961        446
                            ---------- --------- ---------- ----------
NET LOSS                    $(328,637) $(59,763) $(539,357) $(191,851)
                            ========== ========= ========== ==========

Net loss per common share,
 basic and diluted          $   (2.01) $  (0.61) $   (3.44) $   (2.30)
                            ========== ========= ========== ==========
Weighted average common
 shares outstanding,
basic and diluted             163,586    97,854    156,940     83,595
                            ========== ========= ========== ==========
                CLEARWIRE CORPORATION AND SUBSIDIARIES
            CONDENSED CONSOLIDATED STATEMENT OF CASHFLOWS
                            (In thousands)
                             (Unaudited)

                                                 Nine months ended
                                                   September 30,
                                                  2007        2006
                                              ------------ -----------
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss                                      $  (539,357) $ (191,851)
  Adjustments to reconcile net loss to net
   cash used in operating activities:
    Provision for uncollectible accounts            3,631         614
    Depreciation and amortization                  58,558      26,372
    Amortization of prepaid license fees           16,962       4,301
    Amortization of deferred financing costs
     and accretion of debt discount                19,234      13,044
    Deferred income taxes                           3,901       1,875
    Share-based compensation                       28,600       8,366
    Minority interest                              (2,961)       (446)
    Losses from equity investees, net               3,841       5,757
    Loss on extinguishment of debt                159,193           -
        Other-than-temporary impairment loss
         on investments                            14,208           -
    Loss (gain) on other asset disposals              531      (1,885)
    Gain on sale of equity investment              (2,213)
    Gain on sale of business                            -     (19,793)
  Changes in assets and liabilities, net of
   effects from acquisitions:
    Prepaid spectrum license fees                (183,776)    (50,510)
    Inventory                                      (2,331)     (1,823)
    Accounts receivable                            (3,954)        648
    Prepaids and other assets                     (15,716)     (2,710)
    Accounts payable                               26,544      (2,584)
    Accrued expenses and other liabilities         17,136      31,057
    Due to affiliate                                 (519)         13
                                              ------------ -----------
      Net cash used in operating activities      (398,488)   (179,555)
CASH FLOWS FROM INVESTING ACTIVITIES:
  Purchase of property, plant and equipment      (279,198)   (129,032)
  Payments for acquisitions of spectrum
   licenses and other                            (212,353)    (34,701)
  Purchases of short-term investments          (1,144,293)   (655,903)
  Sales or maturities of short-term
   investments                                  1,478,252     385,389
  Purchase of minority interest                    (1,173)          -
  Investments in equity investees                  (5,293)     (2,161)
  Issuance of notes receivable, related party      (2,000)     (4,105)
  Restricted cash                                  (3,323)       (735)
  Restricted investments                           85,670     (33,328)
  Business acquisitions, net of cash acquired      (7,067)    (44,806)
  Proceeds from sale of equity investment           2,250      47,085
  Proceeds from sale of other assets                1,000           -
                                              ------------ -----------
    Net cash used in investing activities         (87,528)   (472,297)
CASH FLOWS FROM FINANCING ACTIVITIES:
  Proceeds from issuance of common stock for
   IPO and other, net                             556,005   1,031,167
  Proceeds from issuance of common stock for
   option and warrant exercises                     4,610           -
  Proceeds from issuance of debt                1,000,000     495,350
  Deferred financing fees                         (66,954)    (21,820)
  Principal payments on long-term debt           (745,696)          -
  Contributions from minority interests            15,000           -
                                              ------------ -----------
    Net cash provided by financing activities     762,965   1,504,697
Effect of foreign currency exchange rates on
 cash and cash equivalents                           (696)      2,231
                                              ------------ -----------
Net increase in cash and cash equivalents         276,253     855,076
CASH AND CASH EQUIVALENTS:
  Beginning of period                             438,030      29,188
                                              ------------ -----------
  End of period                               $   714,283  $  884,264
                                              ============ ===========

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.

                             Three Months Ended    Nine Months Ended
(in thousands)                 September 30th       September 30th
                               2007      2006       2007       2006
                            ---------- --------- ---------- ----------

Operating Loss              $(142,526) $(42,979) $(339,034) $(149,465)
 Depreciation and
  Amortization                 22,659     9,538     58,558     26,372
                            -------------------- ---------------------
EBITDA Loss                  (119,867)  (33,441)  (280,476)  (123,093)
 Non-Cash Items
  Share-Based Compensation     10,398     4,388     28,600      8,367
  Non-Cash Tower/Office
   Rent Expense                 5,559     1,346     11,245      3,809
  Non-Cash Spectrum Lease
   Expense                     19,776     4,448     34,756      8,710
                            -------------------- ---------------------
 Non-Cash                      35,733    10,182     74,601     20,886

Adjusted EBITDA             $ (84,134) $(23,259) $(205,875) $(102,207)
                            ==================== =====================

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.

                                 Three Months Ended Nine Months Ended
(in thousands)                     September 30th     September 30th
                                   2007      2006     2007      2006
                                 --------- -------- --------- --------
ARPU
Service Revenue                  $ 41,297  $18,962  $106,056  $43,855
 Legacy Business Revenue           (4,433)  (3,273)  (11,370)  (8,301)
 CPE Revenue                         (687)    (193)   (1,757)    (366)
                                 ------------------ ------------------
                                   36,177   15,496    92,929   35,188

Average Customers                     322      146       278      114
 Months in Period                       3        3         9        9
ARPU                             $  37.41  $ 35.46  $  37.13  $ 34.35
                                 ================== ==================

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.

                              Three Months Ended   Nine Months Ended
(in thousands)                  September 30th       September 30th
                                2007      2006       2007      2006
                              --------- --------- ---------- ---------
CPGA
 Selling, General and
  Administrative              $103,424  $ 52,166  $259,456   $142,532
 G&A and Other                 (70,830)  (33,686)  (178,182)  (93,598)
                              ------------------- --------------------
 Total Selling Expense          32,594    18,480    81,274     48,934

 Total Gross Adds                   70        43     191          120
 Total CPGA                   $    462  $    426  $  426     $    408
                              =================== ====================

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

SOURCE: Clearwire Corporation