AERIAL COMMUNICATIONS INC
10-Q, 1999-11-12
RADIOTELEPHONE COMMUNICATIONS
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                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                                ----------------
                                    FORM 10-Q

                QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934


 [X]    QUARTERLY REPORT  PURSUANT TO  SECTION 13 OR 15(d) OF THE
        SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended                     September 30, 1999
                               -------------------------------------------------
                                        OR
 [ ]    TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
        SECURITIES EXCHANGE ACT OF 1934

For the transition period from                     to
                              --------------------     ------------------------

                         Commission File Number 0-28262

- --------------------------------------------------------------------------------


                           AERIAL COMMUNICATIONS, INC.


- --------------------------------------------------------------------------------

             (Exact name of registrant as specified in its charter)

           Delaware                                       39-1706857
- -------------------------------              ----------------------------------
(State or other jurisdiction of             (I.R.S. Employer Identification No.)
 incorporation or organization)

            8410 West Bryn Mawr, Suite 1100, Chicago, Illinois 60631
          -----------------------------------------------------------
               (Address of principal executive offices) (Zip Code)

       Registrant's telephone number, including area code: (773) 399-4200

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the  preceding 12 months (or for such  shorter  period that the  registrant  was
required  to file  such  reports),  and  (2) has  been  subject  to such  filing
requirements for the past 90 days.
                                          Yes   X    No
                                             ------     --------
Indicate the number of shares  outstanding  of each of the  issuer's  classes of
common stock, as of the latest practicable date.

             Class                              Outstanding at November 1, 1999
- ------------------------------------            -------------------------------
   Common Shares, $1 par value                          41,804,135 Shares
Series A Common Shares, $1 par value                    52,924,151 Shares

- --------------------------------------------------------------------------------


<PAGE>



                           AERIAL COMMUNICATIONS, INC.
                          ----------------------------
                         3rd QUARTER REPORT ON FORM 10Q
                         ------------------------------
                                      INDEX
                                      -----
                                                                        Page No.
                                                                        --------
Part I.           Financial Information

                  Management's Discussion and Analysis of
                     Results of Operations and Financial Condition        2-12

                  Consolidated Statements of Operations -
                     Three Months and Nine Months Ended September 30,
                     1999 and 1998                                         13

                  Consolidated Statements of Cash Flows -
                     Nine Months Ended September 30, 1999 and 1998         14

                  Consolidated Balance Sheets -
                     September 30, 1999 and December 31, 1998              15

                  Notes to Consolidated Financial Statements             16-19


Part II.          Other Information                                        20

Signatures                                                                 21



<PAGE>



                          PART I. FINANCIAL INFORMATION
                          -----------------------------
                           AERIAL COMMUNICATIONS, INC.
                           ---------------------------
          MANAGEMENT'S DISCUSSION AND ANALYSIS OF RESULTS OF OPERATIONS
          -------------------------------------------------------------
                             AND FINANCIAL CONDITION
                             -----------------------
RESULTS OF OPERATIONS
- ---------------------

Aerial  Communications,  Inc. ("Aerial" or the "Company" - NASDAQ symbol: AERL),
an 82.1%-owned subsidiary of Telephone and Data Systems, Inc. ("TDS"),  provides
Personal   Communications   Services  ("PCS")  in  the  Minneapolis,   Tampa-St.
Petersburg-Orlando,  Houston, Pittsburgh,  Kansas City and Columbus (Ohio) Major
Trading Areas ("MTAs"). The Columbus MTA launched service on March 27, 1997. The
Company's  five  remaining  MTAs launched  service  during the second quarter of
1997.

On September 20, 1999,  VoiceStream  Wireless  Corporation  ("VoiceStream")  and
Aerial  announced  that their  respective  Boards of  Directors  had  approved a
definitive  agreement to merge the two companies.  See the "VoiceStream  Merger"
section of "Liquidity and Capital Resources" below for further discussion of the
transaction.

The  following  is a table  of  summarized  operating  data  for  the  Company's
consolidated operations.

<TABLE>
<CAPTION>
                                                   Sept. 30,   June 30,     March 31,  Dec. 31,     Sept. 30,
As of:                                               1999        1999         1999       1998         1998
- ------                                               ----        ----         ----       ----         ----
<S>                                               <C>         <C>          <C>        <C>          <C>

Total MTA population (in millions)                   27.5        27.5         27.7       27.7         27.6
Total customers                                   363,100     346,600      331,600    311,900      230,700
Net customer additions (quarter)                   16,500      15,000       19,700     81,200       26,700
Churn rate (year to date)                             4.7%        4.8%         4.7%       5.5%         5.5%
Churn rate (quarter)                                  4.6%        4.8%         4.7%       5.1%         5.5%
Average revenue per customer per
    month (year to date)                              $46         $46          $46        $51          $52
Average revenue per customer per
   month (quarter)                                    $46         $47          $46        $49          $50
MTA penetration                                      1.32%       1.26%        1.20%      1.13%        0.84%
Cell sites in service                               1,239       1,207        1,180      1,180        1,152
</TABLE>


Through the first nine months of 1999 the Company has  experienced  a decline in
its net customer  growth rate compared to the same period of the previous  year.
The Company plans to increase its net customer growth rate through the selective
use of  competitive  promotions  and  expansion of third party dealer and Aerial
owned outlets.



                                   2

<PAGE>



Nine Months Ended 9/30/99 Compared to Nine Months Ended 9/30/98

Operating Revenues
- ------------------
Operating  revenues totaled $162.1 million in 1999, an increase of $56.2 million
as compared to 1998. The increase in operating  revenues  reflects the growth of
the  Company's  customer  base in the past year as the Company has added 132,400
customers since September 30, 1998.

Service  revenue totaled $141.0 million in 1999, an increase of $55.4 million as
compared  to 1998.  Service  revenue  primarily  consists of charges for access,
airtime and value-added services provided to the Company's customers who use the
network  operated by the Company (local service  revenue).  Service revenue also
consists  of  charges  to  customers  of  other  wireless  carriers  who use the
Company's  network when  roaming  (outcollect  roaming  revenue) and charges for
long-distance calls made on the Company's systems  (long-distance  revenue). The
increase  in 1999  service  revenue  was  driven by the  growth in the number of
customers using the Company's network during 1999 as compared to 1998, partially
offset by a decline in average  revenue per  customer  per month  ("ARPU").  The
Company's ARPU was $46 for the nine months ended  September 30, 1999 as compared
to $52 for the same period in 1998. The decline in ARPU reflects the addition of
more moderate wireless users to the Company's customer base.

Equipment sales revenue represents the sale of handsets and related  accessories
to  retailers,  independent  agents,  and end user  customers.  Equipment  sales
totaled  $21.1 million in 1999, an increase of $0.8 million as compared to 1998.
The increase in equipment  sales revenue is due to increases in the sales prices
for handsets (primarily due to product mix changes) partially offset by a modest
decline in the number of handsets sold in 1999 as compared to 1998.

Operating Expenses
- ------------------
Operating  expenses  totaled $307.9 million in 1999, an increase of $4.7 million
as compared to 1998.  Operating  expenses increased across most functional areas
due to the  Company's  increased  level  of  business  activity  during  1999 as
compared to 1998.  However,  these increases were partially offset by a decrease
in customer  service  expense and a  significant  decrease in cost of  equipment
sold.

System  operations  expense  totaled  $58.9 million in 1999, an increase of $8.1
million as compared to 1998. System maintenance expenses increased $3.9 million,
primarily  for  maintenance  service  performed on the  Company's  network.  The
Company began incurring  charges for these services during the second quarter of
1998.  Salaries and  benefits for system  operations  employees  increased  $2.7
million,  reflecting increased  headcount,  and cell site expense increased $0.5
million due primarily to the addition of 87 cell sites since September 1998.

Marketing and selling expense totaled $60.4 million in 1999, an increase of $8.4
million as  compared  to 1998.  Efforts to increase  gross  customer  additions,
including  increases in advertising,  promotion and points of distribution (with
associated  increase in store rent expense),  contributed  significantly  to the
overall increase in marketing and selling expense.

                                   3

<PAGE>



Customer  service  expense  totaled  $29.5  million in 1999,  a decrease of $9.2
million as  compared  to 1998.  The  decrease  in  customer  service  expense is
primarily  due to a decrease in bad debt expense as a result of improved  credit
management processes.

Cost of  equipment  sold  totaled  $39.7  million in 1999,  a decrease  of $19.9
million as compared to 1998.  The  decrease  reflects a  significant  decline in
handset cost per unit combined with a modest decrease in handsets sold.

General and administrative expense totaled $52.8 million in 1999, an increase of
$11.8 million as compared to 1998. Consulting expense increased $6.9 million due
primarily  to costs  associated  with the Year  2000  Issue.  Salaries  and wage
expense  increased  $6.0  million  reflecting  an  increase in  personnel  since
September 30, 1998.

Depreciation  expense was $61.0  million in 1999, an increase of $5.6 million as
compared to 1998.  The  increase is due to an  increase in the  Company's  fixed
asset  balances.  As of September  30, 1999,  the Company had $763.4  million of
property and  equipment in service as compared to September  30, 1998,  when the
Company had $668.3 million of property and equipment in service.

Operating (Loss)
- ----------------
Operating  (Loss) totaled  $(145.8) million in 1999, a decrease of $51.6 million
as compared to 1998,  largely as a result of the increase in operating  revenues
in 1999.  Although  service revenues are expected to continue to grow during the
remainder of 1999 as the Company builds its customer  base, the Company  expects
to continue to have operating losses and to generate  negative cash flow in 2000
as it incurs costs associated with that growth.

Investment and Other Income (Expense)
- -------------------------------------
Investment and Other Income  (Expense)  totaled $2.7 million in 1999, a decrease
of  $1.9  million  as  compared  to  1998.  The  decrease  is  primarily  due to
professional  fees the Company paid during 1999 related to the proposed spin-off
of the Company as well as the merger with  VoiceStream (See Note 9 - VoiceStream
Merger).

Interest and Income Taxes
- -------------------------
Interest  expense-affiliate  totaled  $52.3 million in 1999, an increase of $5.3
million as  compared to 1998.  In 1999,  interest  expense-affiliate  represents
interest on amounts  borrowed under the Revolving  Credit Agreement with TDS and
the 3%  guarantee  fees  associated  with the Series A and Series B Zero  Coupon
Notes and the Nokia  1998  Credit  Agreement.  The 1999  increase  is  primarily
attributable to an increase in Company debt guaranteed by TDS and an increase in
the interest  rate charged  under the  Revolving  Credit  Agreement.  During the
fourth  quarter of 1998 the  interest  rate charged on the  outstanding  balance
under the Revolving  Credit Agreement was increased from prime rate plus 1.5% to
prime rate plus 3.0%. See also the  "VoiceStream  Merger"  section of "Liquidity
and Capital  Resources" below for further  discussion of the interest rate under
the Revolving Credit Agreement.


                                   4

<PAGE>



Interest  expense-other  totaled  $16.0  million in 1999,  an  increase  of $2.9
million as compared to 1998. In 1999, interest expense-other relates to interest
expense  accreted  on the Series A and Series B Zero  Coupon  Notes,  as well as
interest  expense  related  to the Nokia  1998  Credit  Agreement.  The  average
outstanding  balance of long-term debt (including  current portions) was greater
in 1999 as compared to 1998, resulting in greater interest expense.

Income taxes. The Company is included in a consolidated  federal tax return with
other members of the TDS consolidated  group. For financial  reporting purposes,
the Company  computes  its federal  income taxes as if it were filing a separate
return as its own  affiliated  group and was not included in the TDS group.  TDS
and the Company are parties to a tax  allocation  agreement,  as well as a March
12, 1999 tax settlement  agreement which resulted in a payment of $114.5 million
from TDS to Aerial.  The $114.5 million received by Aerial covered the estimated
tax losses  incurred by the  Company  and used by TDS for the period  commencing
from  January 1, 1996  through  August 31, 1999.  The tax  settlement  agreement
requires the final settlement  amount to cover tax losses incurred by Aerial and
used by TDS for the period  commencing  January 1, 1996 and ending  December 31,
1999.

The  payment of the $114.5  million by TDS,  partially  offset by an increase in
deferred  income  tax  expense  of $1.8  million,  resulted  in a net income tax
benefit of $112.7 million for 1999.

Net (Loss) and (Loss) Per Common and Series A Common Share
- ----------------------------------------------------------
Net (loss)  totaled  $(98.8)  million in 1999 and $(255.5)  million in 1998. Net
(loss) per Common and Series A Common  Share was  $(1.37) in 1999 and $(3.56) in
1998.  The  decrease in the  Company's  Net (loss) and Net (loss) per Common and
Series A Common Share in 1999 as compared to 1998 is due to increased  operating
revenues and the income tax benefit  generated by the $114.5 million received by
the Company from TDS related to the tax settlement  agreement,  partially offset
by an increase in both operating and non-operating expenses.

Three Months Ended 9/30/99 Compared to Three Months Ended 9/30/98

Operating Revenues
- ------------------
Operating  revenues  totaled $56.8 million in 1999, an increase of $18.3 million
as compared to 1998.  Service revenue totaled $49.1 million in 1999, an increase
of $16.5 million as compared to 1998.  The increase in 1999 service  revenue was
driven by the  growth in the number of  customers  using the  Company's  network
during  1999 as  compared  to 1998  partially  offset by a decline in ARPU.  The
Company's ARPU was $46 for the three months ended September 30, 1999 as compared
to $50 for the same period in 1998. The decline in ARPU reflects the addition of
more moderate  wireless users to the Company's  customer base.  Equipment  sales
totaled $7.7  million in 1999,  an increase of $1.9 million as compared to 1998.
The increase in equipment sales revenue  reflects an increase in the sales price
for  handsets  sold in 1999 as  compared to 1998  (primarily  due to product mix
changes) as well as an increase in total handsets sold.



                                   5

<PAGE>



Operating Expenses
- ------------------
Operating  expenses were $105.4  million in 1999, an increase of $6.4 million as
compared to 1998.  The increase in operating  expenses is for reasons  generally
the same as the first nine months of 1999.

Operating (Loss)
- ---------------
Operating (Loss) totaled $(48.6) million in 1999, a decrease of $12.0 million as
compared to 1998,  largely as a result of the increase in operating  revenues in
1999 partially offset by an increase in operating expenses.

Investment and Other Income (Expense)
- -------------------------------------
Investment and Other Income (Expense) totaled $(2.7) million in 1999, a decrease
of $6.9  million as compared  to 1998.  The  decrease  is due to a $3.3  million
decrease in the  minority  share of Aerial  Operating  Company,  Inc.'s  ("AOC")
consolidated net loss (due to cumulative  allocable  losses  exceeding  original
investments),  and for  reasons  generally  the same as the first nine months of
1999.

Interest Expense
- ----------------
Interest  expense  totaled $24.3 million in 1999, an increase of $2.4 million as
compared to 1998. The increase in interest expense is for reasons  generally the
same as the first nine months of 1999.

Net (Loss) and (Loss) Per Common and Series A Common Share
- ----------------------------------------------------------
Net (loss)  totaled  $(76.2)  million in 1999 and $(79.1)  million in 1998.  Net
(loss) per Common and Series A Common  Share was  $(1.06) in 1999 and $(1.10) in
1998.  The  decrease in the  Company's  Net (loss) and Net (loss) per Common and
Series A Common Share in 1999 as compared to 1998 is due  primarily to increased
operating revenues in 1999 partially offset by an increase in both operating and
non-operating expenses.

LIQUIDITY AND CAPITAL RESOURCES
- -------------------------------
The costs of development,  construction,  start-up and post-launch activities of
the Company require  substantial  capital.  From inception through September 30,
1999, the Company had expended  $304.4  million for its six licenses,  including
capitalized  interest,  $794.5  million for all other capital  expenditures  and
incurred  cumulative  net  losses of $729.6  million.  The  Company  expects  to
continue to incur  significant  operating losses and generate negative cash flow
from operating activities in 2000 as it continues to build its customer base.

Cash  flows from  operating  activities  used  $33.4  million in 1999 and $173.3
million in 1998.  Operating cash outflow (operating loss before depreciation and
amortization  expense)  totaled  $79.1  million  in 1999 as  compared  to $136.3
million in 1998. The March 12, 1999 tax  settlement  agreement with TDS provided
$114.5 million in 1999 and cash flows from other operating

                                   6

<PAGE>



activities  (investment and other income,  interest expense,  changes in working
capital and changes in other assets and  liabilities)  required $68.8 million in
1999 and required $37.0 million in 1998.

Cash flows from financing  activities  provided $63.8 million in 1999 and $236.6
million  in  1998.  Cash  provided  in 1999  was  primarily  due to the  Company
borrowing  $175.8  million under the Revolving  Credit  Agreement  with TDS. The
Company paid $114.5 million to TDS to repay a portion of the outstanding balance
under the Revolving  Credit  Agreement with the proceeds from the tax settlement
agreement.  In 1998,  borrowings under the Revolving  Credit Agreement  provided
$235.8  million.  The Company also received $200 million from the sale to Sonera
Corporation,  formerly  known  as  Sonera  Ltd.  ("Sonera"),  of a 19.4%  equity
interest in AOC.  The  proceeds  from the sale were  remitted to TDS to pay down
part of the outstanding balance under the Revolving Credit Agreement.

Cash  flows  used in  investing  activities  totaled  $27.8  million  in 1999 as
compared to $63.9 million in 1998.  Cash used in 1999 and 1998 was primarily for
additions  to property  and  equipment  for PCS network and  information  system
assets.  Fixed asset additions were financed through a combination of borrowings
under the Revolving  Credit  Agreement  with TDS, and proceeds from the Series B
Zero Coupon Notes and the Nokia 1996 and 1998 Credit Agreements.

For all of 1999,  the Company  estimates  that the aggregate  funds required for
capital  expenditures  for the  continuing  development  of its PCS networks and
services  will total  approximately  $90  million.  The Company will be building
additional cell sites to augment its existing coverage area,  primarily corridor
coverage on  interstates  to suburbs.  The Company will  continue to upgrade its
switching and other fixed network  equipment to support future customer  growth.
Also in 1999,  capital  expenditures  related to information  systems included a
significant upgrade of the Company's billing and customer care system, including
new hardware and software to support  employee and customer  growth,  to address
the Year 2000 Issue and for other project initiatives.

The Company estimates requiring $215 million for working capital requirements to
fund operations for all of 1999,  including an estimated $65 million in interest
expense.

On June 30,  1998,  the  Company  and Nokia  Telecommunications  Inc.  ("Nokia")
entered into an agreement ("1998 Credit  Agreement") in which Nokia will provide
up to an aggregate  $150 million in financing to the Company for the purchase of
network  infrastructure  equipment and services from Nokia. Loans under the 1998
Credit  Agreement  are to be made  available  in two  tranches.  With respect to
Tranche A, the Company  borrowed  $68.5 million and, upon its written notice and
payment of an extension  fee to Nokia,  extended the maturity  date of Tranche A
loans to June 30, 2000.  A second  tranche of $75 million  ("Tranche  B") became
available  commencing on June 30, 1999.  The maturity date of both the Tranche A
and Tranche B loans is June 30, 2000.  The  obligations of the Company under the
1998 Credit  Agreement  are fully and  unconditionally  guaranteed  by TDS at an
annual fee rate of 3%. As of September  30, 1999,  the Company had $61.1 million
available for borrowing  under the 1998 Credit  Agreement with Nokia. As part of
the  "VoiceStream  Merger"  discussed  below,  at the merger  close  VoiceStream
Wireless Holding  Corporation  ("Holding")  will repay all obligations  under or
amend the Nokia

                                   7

<PAGE>



1998 Credit Agreement.  In connection  therewith,  TDS will be released from its
guaranties and all liabilities thereunder.

Under the TDS Revolving  Credit  Agreement,  as amended,  AOC may borrow up to a
maximum  amount (the  "Maximum  Amount"),  less the amount of certain  financing
obtained  by AOC or Aerial,  including  the amount of any  borrowings  under the
Nokia 1998 Credit Agreement. However, debt financing related to the Series A and
Series B Zero Coupon Notes does not change the Maximum  Amount.  As of September
30, 1999, the Maximum Amount  available under the TDS Revolving Credit Agreement
was $775 million and the amount available for borrowing by AOC was approximately
$81 million. See also "TDS Debt Replacement" below for further discussion of the
TDS Revolving Credit Agreement.

VoiceStream Merger

On September 20, 1999,  VoiceStream and Aerial  announced that their  respective
Boards  of  Directors  had  approved  a  definitive  agreement  to merge the two
companies.  VoiceStream,  the Company and TDS entered into a September 17, 1999,
Agreement and Plan of Reorganization pursuant to which VoiceStream will exchange
0.455 shares of  VoiceStream  common stock for each of the Company's  Common and
Series A Common Shares.  The conversion number is subject to adjustment (but not
below 0.455 or above 0.5 of a share of  VoiceStream  common  stock) in the event
Aerial's  merger with  VoiceStream  closes  prior to the closing of the proposed
merger  of  Omnipoint  Corporation  and  VoiceStream  and the  average  price of
VoiceStream  common stock for the 15-day  trading period prior to the closing is
less than $39.56 per share.

Aerial public  shareholders  will have the right to elect to receive $18 in cash
in lieu of shares of  VoiceStream.  Sonera  will  convert its shares in AOC into
shares of Aerial (at a  conversion  ratio of 6.72919)  immediately  prior to the
merger becoming  effective.  The parties  anticipate that the merger will be tax
free to Aerial  shareholders  who elect to receive  VoiceStream  stock.  TDS and
major  shareholders  of VoiceStream  have agreed to vote in favor of the merger.
This  merger is subject to  shareholder  approval by both  companies  as well as
federal,  state, and other regulatory approvals,  including those of the Federal
Communications  Commission  and the  Federal  Trade  Commission.  The  merger is
expected to close in the first quarter of 2000. The following is a discussion of
significant transactions executed in anticipation of but not contingent upon the
merger with VoiceStream, except as indicated below.

TDS Debt Replacement
- --------------------
On September 17, 1999,  TDS, the Company,  AOC,  VoiceStream and Holding entered
into a Debt/Equity Replacement Agreement (the "TDS Debt Replacement Agreement").
In accordance with the TDS Debt Replacement Agreement,  on November 1, 1999, TDS
assigned to Aerial as a contribution to capital $420 million of debt owed by AOC
to TDS under the TDS  Revolving  Credit  Agreement  in exchange for an aggregate
19,090,909  shares of Aerial  common  stock,  at a purchase  price of $22.00 per
share.  On September 17, 1999, the date of the TDS Debt  Replacement  Agreement,
the closing price of Aerial  Common  Shares was $20.00 per share.  The shares of
Aerial common stock  consisted of 6,166,758  Aerial Common Shares and 12,924,151
Aerial Series A Common Shares.  Thereafter,  on November 1,1999, Aerial assigned
to AOC as a contribution  to capital the $420 million of debt received from TDS,
as well as $75

                                   8

<PAGE>



million received by Aerial from Sonera (see "Sonera-Aerial Investment" below) in
exchange for an aggregate of 3,343,642 common shares of AOC. As a result of such
transaction, $420 million of debt previously owed by AOC to TDS was extinguished
and the Maximum  Amount under the  Revolving  Credit  Agreement was reduced from
$775 million to $355 million. In addition, the interest rate under the Revolving
Credit  Agreement  was  decreased to prime rate plus 2.35% and the  guarantee by
Aerial of AOC's obligations  thereunder was terminated.  Effective at the merger
closing,  TDS and AOC will amend the TDS Revolving  Credit Agreement by entering
into an Amended and Restated Credit  Agreement.  The Amended and Restated Credit
Agreement  will evidence any loans  outstanding  under the TDS Revolving  Credit
Agreement  at that time and the  maturity  date of such  loans  will be one year
after the effective date of the Amended and Restated Credit Agreement.

Sonera-Aerial Investment
- ------------------------
On September 17, 1999, TDS, Aerial, AOC, VoiceStream, Holding, Sonera and Sonera
Corporation U.S. ("Sonera U.S.") entered into a Settlement Agreement and Release
providing for the Sonera-Aerial Investment. In accordance with the Sonera-Aerial
Investment, on November 1, 1999, Sonera invested an aggregate of $230 million in
Aerial  and AOC at an  equivalent  price of $22.00  per  share of Aerial  common
stock.  Aerial issued  3,409,091 Aerial common shares to Sonera in consideration
for  $75  million,  and  AOC  issued  1,046,999  shares  of  AOC  to  Sonera  in
consideration for $155 million.  The funds invested by Sonera were used to repay
outstanding  debt under the TDS Revolving  Credit Agreement and are available to
be drawn down by AOC under the TDS Revolving Credit  Agreement  between November
1, 1999, and the closing of the merger.  As a result,  the amount  available for
borrowing by AOC under the TDS Revolving  Credit Agreement was $265.6 million as
of November 1, 1999.  Additionally,  Sonera  surrendered  317,108  shares of AOC
stock on November 1, 1999,  without  releasing its claims with respect  thereto,
and will surrender an additional 317,108 shares at the closing of the merger. At
the merger closing,  TDS, Aerial, AOC, VoiceStream and Holding, on the one hand,
and Sonera and Sonera U.S., on the other hand,  will release each other from all
claims relating to actions occurring  through September 17, 1999,  including all
claims by  Sonera to the  634,216  disputed  shares,  and,  subject  to  certain
exceptions, will extend such release through the date of the merger closing.

Market Risk

The  Company is subject to market  rate risks due to  fluctuations  in  interest
rates and equity  markets.  The majority of the Company's debt is in the form of
variable rate notes with  original  maturities  ranging from 1 to 10 years.  The
Series A and  Series B Zero  Coupon  Notes are fixed  rate debt and,  therefore,
fluctuations  in interest  rates can lead to  fluctuations  in the fair value of
these instruments. The Company has not entered into any financial derivatives to
reduce its exposure to interest rate risks. There has been no material change in
the fair value  relative to the Company's  outstanding  debt since  December 31,
1998.

Year 2000 Issue

The Year 2000 Issue  exists  because  many  computer  systems  and  applications
abbreviate  dates using only two digits,  rather than four  digits,  e.g.,  "98"
rather than "1998". Unless corrected, this

                                   9

<PAGE>



shortcut may cause problems when the century date "2000"  occurs.  On that date,
some  computer  operating  systems,  applications  and embedded  technology  may
recognize  the date as  January 1,  1900,  instead  of  January 1, 2000.  If the
Company fails to correct any critical  Year 2000  processing  problems  prior to
January 1, 2000,  the  affected  systems may either cease to function or produce
erroneous  data,  which could have material  adverse  operational  and financial
consequences.

The Company's management established a project team to address Year 2000 issues.
The  Company's  plan to address  the Year 2000 Issue  consists  of five  general
phases: (i) Awareness,  (ii) Assessment,  (iii) Renovation,  (iv) Validation and
(v) Implementation.

The Awareness phase consisted of developing an overall  compliance  strategy and
establishing a Year 2000 project team that reports periodically to the Company's
Audit  Committee.  TDS Management  established a Year 2000 Program Office at the
TDS corporate level to coordinate  activities of the Year 2000 project teams, to
monitor the current status of individual projects, to report periodically to the
TDS Audit  Committee,  and to promote the  exchange of  information  between all
business units to share knowledge and solution techniques.  On an ongoing basis,
the project  teams  continue  to provide  Year 2000  information  and updates to
customers,  employees and business partners. Aerial management has made the Year
2000  Issue a top  priority.  The  Year  2000  effort  covers  the  network  and
supporting infrastructure for the provision of PCS services; the operational and
financial  information  technology  ("IT")  systems  and  applications,  such as
computer systems that support key business  functions such as billing,  finance,
customer  service,  procurement  and  supply;  and a  review  of the  Year  2000
readiness efforts of the Company's critical vendors.

The  Assessment  phase  included the  identification  of core business areas and
processes,  analysis of systems and hardware  supporting the core business areas
and the prioritization of renovation or replacement of systems and hardware that
were determined not to be Year 2000 ready.  Included in the Assessment phase was
an analysis  of risk  management  factors  such as  contingency  plans and legal
matters.  Except for the contingency  plans as discussed  below,  the Assessment
phase was completed in the first quarter of 1999.

The Year 2000 project team identified those mission critical  hardware,  systems
and applications that were not Year 2000 ready. These critical hardware, systems
and applications  that were not Year 2000 ready have undergone  renovation.  The
Renovation phase consisted of the remediation or replacement of mission critical
systems,  applications and hardware. The renovation of mission critical systems,
applications and hardware has been completed.

The renovated mission critical hardware, systems and applications have undergone
Year 2000 validation testing.  The Validation phase included testing,  verifying
and validating the renovated or replaced platforms, applications,  databases and
utilities. The Validation phase consisted of independent verification testing of
mission  critical  systems,  applications  and hardware,  as well as network and
system component  upgrades received from suppliers.  In addition,  selected Year
2000  upgrades  were tested in a  controlled  environment  that  replicated  the
current  environment  and was  equipped to simulate  the turn of the century and
leap  year  dates.  The  Company  will rely on the  Cellular  Telecommunications
Industry  Association  ("CTIA"),   Alliance  for   Telecommunications   Industry
Solutions ("ATIS") and TELCO Forum, which formed working

                                   10

<PAGE>



groups to coordinate efforts of various carriers and manufacturers to facilitate
inter-network Year 2000 testing.  These programs have concluded and,  generally,
the findings indicate that there are no known network  inter-operability defects
related to Year 2000  associated with the available Year 2000 ready upgrades for
the networks.  The Company has analyzed the findings and has installed  upgrades
appropriate to its network. Validation of mission critical hardware, systems and
applications was completed as of October 31, 1999.

The  Implementation  phase  involves  migrating  the  converted,  renovated  and
validated mission critical  systems,  applications and hardware into production.
This phase is expected to be completed during the fourth quarter of 1999.

As with other telecommunications  services providers,  there exists a worst case
scenario  possibility  that a failure to  correct a Year 2000  problem in one or
more of the mission critical  network elements or IT applications  could cause a
significant   disruption  of,  or  interruption   in,  certain  normal  business
functions.  Management  believes it has assembled the proper staffing and tools,
and put in place procedures to identify and prepare all mission critical systems
for the Year 2000 and believes the necessary  programs are in place for a smooth
Year 2000 transition. Based on the assessments and work performed to date by the
project  team,  management  believes  that any such  material  disruption to the
operations due to failure of an internal system is unlikely. However, management
cannot  provide  assurance  that its plan to address Year 2000 readiness will be
successful  as the Company is subject to various risks and  uncertainties.  Like
most other telecommunications  operators, the Company is highly dependent on the
telecommunications  network  vendors  to  develop  and  provide  Year 2000 ready
hardware,  systems  and  applications  and on  other  third  parties,  including
vendors,  other  telecommunications  service providers,  government agencies and
financial  institutions,  to deliver reliable services and timely upgrades.  The
Company has contacted critical vendors  requesting  information about their Year
2000  readiness.  The  responses  have  been  used by the  Company  to make  its
renovations and are being used in developing the Company's  overall  contingency
plans.

The Company  cannot assess with  certainty  the magnitude of any such  potential
adverse  impact.  However,  based upon risk  assessment work conducted thus far,
management  believes that the most reasonably  likely worst case scenario of the
failure by the Company, its suppliers or other telecommunications  carriers with
which  the  Company  interconnects  to  resolve  Year  2000  issues  would be an
inability  by the  Company to (i)  provide  telecommunications  services  to the
Company's customers,  (ii) route and deliver telephone calls originating from or
terminating with other telecommunications  carriers, (iii) timely and accurately
process service  requests and (iv) timely and accurately bill its customers.  In
addition to lost earnings, these failures could also result in loss of customers
due to service interruptions and billing errors, substantial claims by customers
and increased  expenses  associated  with  stabilizing  operations and executing
contingency plans.

The Company's  contingency plan initiatives  include business  recovery planning
and establishing  command centers and critical support teams.  Project teams are
developing  alternate  processes to support critical  customer  functions in the
event  information  systems  or  mechanized   processes   experience  Year  2000
disruptions;  as well as for repair or  replacement  of any affected  systems or
processes.  The teams are also developing alternate plans for critical suppliers
of  products/services  that fail to meet established  service levels due to Year
2000 disruptions. Retention

                                   11

<PAGE>



and  backup  procedures  for  customer  and  critical  business  data are  being
developed to provide the Company with pre-rollover  recovery  capabilities.  The
Company  anticipates  completing the balance of its contingency  planning in the
fourth quarter of 1999.

The Company estimates that the total costs related to the Year 2000 project will
be  approximately  $19 million.  Through  September  30,  1999,  the total costs
directly  associated with the Year 2000 Issue were approximately  $13.6 million.
The  timing  of  expenditures  may vary  and is not  necessarily  indicative  of
readiness  efforts or progress  to date.  Though  Year 2000  project  costs will
directly impact the reported level of net (loss),  the Company intends to manage
its total cost structure,  including  deferral of non-critical  projects,  in an
effort to mitigate the impact of Year 2000 project costs.




PRIVATE SECURITIES LITIGATION REFORM ACT OF 1995 SAFE HARBOR CAUTIONARY
STATEMENT

This Form 10-Q contains "forward-looking"  statements, as defined in the Private
Securities   Litigation   Reform  Act  of  1995,   that  are  based  on  current
expectations,  estimates and  projections.  Statements  that are not  historical
facts,  including  statements  about the Company's  beliefs and expectations are
forward-looking  statements.   These  statements  contain  potential  risks  and
uncertainties and, therefore,  actual results may differ materially. The Company
undertakes  no  obligation  to update  publicly any  forward-looking  statements
whether as a result of new information, future events or otherwise.

Important factors that may affect these projections or expectations include, but
are not limited to:  changes in the overall  economy;  changes in competition in
the Company's markets; advances in telecommunications technology; changes in the
telecommunications  regulatory  environment;   pending  and  future  litigation;
availability  of  future  financing;  timing  of the  merger  with  VoiceStream;
unanticipated changes in growth in PCS customers, penetration rates, churn rates
and the mix of products  and  services  offered in the  Company's  markets;  and
unanticipated  problems with the Year 2000 Issue.  Readers  should  evaluate any
statements in light of these important factors.


                                   12

<PAGE>


                                AERIAL COMMUNICATIONS, INC. AND SUBSIDIARIES
                                    CONSOLIDATED STATEMENTS OF OPERATIONS
                                                  Unaudited
                                                  ---------
<TABLE>
<CAPTION>
                                                                    Three Months Ended                   Nine Months Ended
                                                                       September 30,                        September 30,
                                                             -------------------------------       -----------------------------
                                                                 1999               1998               1999             1998
                                                             ------------       ------------       ------------     ------------
                                                                    (Dollars in thousands, except per share amounts)
OPERATING REVENUES
<S>                                                          <C>                <C>                <C>              <C>

    Service                                                  $     49,076       $     32,600       $    140,969     $     85,535
    Equipment sales                                                 7,701              5,838             21,134           20,337
                                                             ------------       ------------       ------------     ------------
        Total Operating Revenues                                   56,777             38,438            162,103          105,872

OPERATING EXPENSES
    System operations                                              18,393             16,704             58,915           50,843
    Marketing and selling                                          22,489             16,603             60,365           52,009
    Customer service                                                9,365             15,107             29,527           38,758
    Cost of equipment sold                                         14,114             16,223             39,671           59,616
    General and administrative                                     18,578             14,266             52,759           40,946
    Depreciation                                                   20,583             18,253             61,015           55,416
    Amortization of intangibles                                     1,889              1,889              5,666            5,666
                                                             ------------       ------------       ------------     ------------
        Total Operating Expenses                                  105,411             99,045            307,918          303,254

OPERATING (LOSS)                                                  (48,634)           (60,607)          (145,815)        (197,382)

INVESTMENT AND OTHER INCOME (EXPENSE)
    Minority share of loss                                            479              3,766              5,381            3,766
    Investment (losses)                                                --               (128)              (100)            (128)
    Interest income                                                   115                115                373              778
    Other income (expense)                                         (3,229)               481             (2,998)             144
                                                             -------------      ------------       ------------     ------------
        Total Investment and Other Income (Expense)                (2,635)             4,234              2,656            4,560



(LOSS) BEFORE INTEREST AND INCOME  TAXES                          (51,269)           (56,373)          (143,159)        (192,822)

INTEREST EXPENSE
    Interest expense-affiliate                                     18,693             17,115             52,261           46,957
    Interest expense-other                                          5,643              4,828             16,040           13,186
                                                             ------------       ------------       ------------     ------------
        Total Interest Expense                                     24,336             21,943             68,301           60,143

(LOSS) BEFORE INCOME TAXES                                        (75,605)           (78,316)          (211,460)        (252,965)
    Income tax expense (benefit)                                      576                821           (112,654)           2,567
                                                             ------------       ------------       ------------     ------------

NET (LOSS)                                                   $    (76,181)      $    (79,137)      $    (98,806)    $   (255,532)
                                                             ============       ============       ============     ============

WEIGHTED AVERAGE COMMON AND
    SERIES A COMMON SHARES (000s)                                  71,928             71,735             71,883           71,701
(LOSS) PER COMMON AND
    SERIES A COMMON SHARE                                    $      (1.06)      $      (1.10)      $      (1.37)    $      (3.56)
                                                             ============       ============       ============     ============

</TABLE>

Accompanying notes to consolidated  financial statements are an integral part of
these statements.

                                   13

<PAGE>



                  AERIAL COMMUNICATIONS, INC. AND SUBSIDIARIES
                      CONSOLIDATED STATEMENTS OF CASH FLOWS
                                    Unaudited
                                    ---------
<TABLE>
<CAPTION>
                                                             Nine Months ended
                                                                September 30,
                                                          ----------------------
                                                             1999        1998
                                                          ----------  ----------
                                                          (Dollars in Thousands)
CASH FLOWS FROM OPERATING ACTIVITIES
<S>                                                       <C>         <C>

    Net (Loss)                                            $ (98,806)  $(255,532)
    Add (Deduct) adjustments to reconcile net (loss)
        to net cash (used) by operating activities
    Depreciation and amortization                            66,681      61,082
    Noncash interest expense                                 13,606      11,818
    Deferred taxes                                            1,670       2,567
    Investment losses                                           100         128
    Minority share of (loss)                                 (5,381)     (3,766)
    Loss on sale of property and equipment                      235         559
    Change in accounts receivable-customer                   (3,689)     (2,477)
    Change in inventory                                       2,366       9,875
    Change in accounts payable-affiliates                       (22)       (126)
    Change in accounts payable-trade                        (18,508)     (3,105)
    Change in accrued interest-affiliate                      3,030       2,431
    Change in other assets and liabilities                    5,339       3,233
                                                          ----------  ----------
                                                            (33,379)   (173,313)
                                                          ----------  ----------

CASH FLOWS FROM FINANCING ACTIVITIES
    Borrowings under Revolving Credit Agreement-TDS         175,796     235,766
    Repayments of borrowings under the Revolving Credit
        Agreement-TDS                                      (114,500)   (200,000)
    Proceeds from minority investor                            --       200,000
    Issuance of common stock                                  2,464         812
                                                          ----------  ----------
                                                             63,760     236,578
                                                          ----------  ----------

CASH FLOWS FROM INVESTING ACTIVITIES
    Additions to property and equipment                     (26,764)    (64,541)
    Proceeds from sale of property and equipment                 75         505
    Change in temporary and other investments                (1,076)        178
                                                          ----------  ----------
                                                            (27,765)    (63,858)
                                                          ----------  ----------

NET INCREASE (DECREASE) IN CASH AND CASH
    EQUIVALENTS                                               2,616        (593)
CASH AND CASH EQUIVALENTS -
    Beginning of period                                       4,943       5,012
                                                          ----------  ----------

    End of period                                         $   7,559   $   4,419
                                                          ==========  ==========
</TABLE>



The accompanying notes to consolidated financial statements are an integral part
of these statements.



                                   14

<PAGE>



                  AERIAL COMMUNICATIONS, INC. AND SUBSIDIARIES
                           CONSOLIDATED BALANCE SHEETS
<TABLE>
<CAPTION>
                                                       (Unaudited)
                                                     September 30,  December 31,
                                                         1999          1998
                                                     -------------  ------------
ASSETS                                                 (Dollars in Thousands)
CURRENT ASSETS
<S>                                                     <C>           <C>
    Cash and cash equivalents                           $   7,559     $   4,943
    Temporary investments                                    --              35
    Accounts receivable
        Customer, less allowance of
          $3,479 and $5,875, respectively                  27,893        24,204
        Roaming                                             2,347         2,252
        Other                                                 899         1,348
    Inventory                                               9,012        11,378
    Prepaid rent                                            2,932         3,666
    Other                                                   1,173           898
                                                      ------------  ------------
                                                           51,815        48,724
PROPERTY and EQUIPMENT
    In service and under construction                     788,927       733,958
    Less accumulated depreciation                        (173,561)     (112,677)
                                                      ------------  ------------
                                                          615,366       621,281
INVESTMENTS
    Investment in PCS licenses-net
     of accumulated amortization of
     $17,709 and $12,044, respectively                    283,823       289,488
    Other                                                   2,455         1,444
                                                      ------------  ------------
                                                          286,278       290,932
DEFERRED COSTS                                                277           410
                                                      ------------  ------------
TOTAL ASSETS                                            $ 953,736     $ 961,347
                                                      ============  ============

LIABILITIES AND SHAREHOLDERS' (DEFICIT) EQUITY
CURRENT LIABILITIES
    Accounts payable
        Affiliates                                      $   2,784     $   6,727
        Trade                                              34,255        56,097
    Current portion of long-term debt                      82,372          --
    Accrued interest-affiliate                              7,969         4,939
    Accrued compensation                                    7,666         5,169
    Accrued taxes                                           7,981         7,015
    Microwave relocation costs payable                        828         1,828
    Other                                                   5,302         4,349
                                                      ------------  ------------
                                                          149,157        86,124
                                                      ------------  ------------

REVOLVING CREDIT AGREEMENT-TDS                            611,239       549,943
                                                      ------------  ------------
LONG-TERM DEBT                                            246,123       278,010
                                                      ------------  ------------
DEFERRED TAX LIABILITY-NET                                 18,027        16,357
                                                      ------------  ------------
MINORITY INTEREST                                            --           5,835
                                                      ------------  ------------
COMMON SHAREHOLDERS' (DEFICIT) EQUITY
    Common Shares, par value $1.00 per share               31,969        31,789
    Series A Common Shares, par value $1.00 per share      40,000        40,000
    Additional paid-in capital                            586,852       584,114
    Retained deficit                                     (729,631)     (630,825)
                                                      ------------  ------------
                                                          (70,810)       25,078
                                                      ------------  ------------
TOTAL LIABILITIES AND SHAREHOLDERS' (DEFICIT) EQUITY    $ 953,736     $ 961,347
                                                      ============  ============
</TABLE>

The accompanying notes to consolidated financial statements are an integral part
of these statements.



                                   15

<PAGE>



                  AERIAL COMMUNICATIONS, INC. AND SUBSIDIARIES

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1.   The consolidated financial statements included herein have been prepared by
     the Company,  without audit,  pursuant to the rules and  regulations of the
     Securities  and  Exchange  Commission.  Certain  information  and  footnote
     disclosures  normally  included  in the  financial  statements  prepared in
     accordance  with  generally  accepted   accounting   principles  have  been
     condensed or omitted pursuant to such rules and  regulations,  although the
     Company  believes that the disclosures are adequate to make the information
     presented not misleading. It is suggested that these consolidated financial
     statements  be  read  in  conjunction  with  the   consolidated   financial
     statements and the notes thereto included in the Company's Annual Report on
     Form 10-K.

     The accompanying  unaudited  consolidated  financial statements contain all
     adjustments  (consisting  of only  normal  recurring  items)  necessary  to
     present  fairly the  financial  position  as of  September  30,  1999,  and
     December 31, 1998,  the results of operations for the nine and three months
     ended  September 30, 1999 and 1998,  and the cash flows for the nine months
     ended  September 30, 1999 and 1998.  The results of operations for the nine
     and three months ended  September  30, 1999 and 1998,  are not  necessarily
     indicative of the results to be expected for the full year.

     Certain amounts reported in prior periods have been reclassified to conform
     to the current period presentation.

2.   Net (Loss)  per  Common  and  Series A Common  Share for the nine and three
     months  ended  September  30,  1999 and  1998,  was  computed  based on the
     weighted  average  number of Common and Series A Common Shares  outstanding
     during the period.

3.   Comprehensive income (loss) equals Net (loss) for the nine and three months
     ended September 30, 1999 and 1998.

4.   Supplemental Cash Flow Information.  Additions to property and equipment of
     $36.9 million were financed through an increase in long-term debt.

     In the first nine months of 1999,  the Company  incurred  interest  charges
     totaling  $68.3  million.  The  interest  charges  were  comprised of $45.8
     million  related to the Revolving  Credit  Agreement with TDS, $6.4 million
     for TDS  guarantee  fees on the Series A and Series B Zero Coupon Notes and
     obligations  under the Nokia 1998 Credit  Agreement,  $2.2  million paid to
     Nokia for interest  charges  relating to the 1998 Credit  Agreement,  $13.6
     million in accreted interest on the Series A and Series B Zero Coupon Notes
     and $0.3 million in other interest charges.

     During the first nine months of 1998, the Company incurred interest charges
     totaling  $60.2  million.  The  interest  charges  were  comprised of $42.2
     million  related to the Revolving  Credit  Agreement with TDS, $4.8 million
     for TDS  guarantee  fees on the Series A and Series B Zero Coupon Notes and
     obligations under the Nokia 1996 and 1998 Credit  Agreements,  $0.4 million
     paid to Nokia for interest charges  relating to the 1996 Credit  Agreement,
     $0.5 million paid to Nokia for interest charges relating to the 1998 Credit
     Agreement, $11.8 million in accreted  interest on the Series A and Series B
     Zero Coupon Notes and $0.5 million in other

                                   16

<PAGE>



     interest charges.  Of these amounts,  the Company  capitalized $0.1 million
     relating to its work in process  expenditures.  The remaining $60.1 million
     was charged to expense.

5.   Minority  Interest.  On  September  8,  1998,  pursuant  to the  terms of a
     Purchase Agreement (the "Purchase Agreement") between TDS, the Company, AOC
     and Sonera  Corporation,  a company organized under the laws of Finland and
     formerly known as Sonera Ltd.  ("Sonera"),  Sonera purchased  approximately
     2.4  million  shares of common  stock of AOC  representing  a 19.4%  equity
     interest in AOC (subject to adjustment under certain  circumstances) for an
     aggregate purchase price of $200 million.

     See Note 9 -  VoiceStream  Merger for  discussion  of  Sonera's  additional
     investment in the Company.

     Minority share of loss of $5.4 million and $3.8 million represents Sonera's
     share of AOC's  consolidated net loss for the first nine months of 1999 and
     1998, respectively.

6.   Revolving Credit Agreement.  Under the TDS Revolving Credit  Agreement,  as
     amended, AOC may borrow up to a maximum amount (the "Maximum Amount"), less
     the amount of certain  financing  obtained by AOC or Aerial,  including the
     amount of any borrowings  under the Nokia 1998 Credit  Agreement.  However,
     debt financing  related to the Series A and Series B Zero Coupon Notes does
     not change the Maximum Amount. As of September 30, 1999, the Maximum Amount
     available under the TDS Revolving Credit Agreement was $775 million and the
     amount available for borrowing by AOC was approximately $81 million.  As of
     November 1, 1999, as a result of the TDS Debt Replacement and Sonera-Aerial
     Investment  described in Note 9, the Maximum  Amount was $355 million,  the
     amount  outstanding  was zero and the amount  available  for  borrowing was
     $265.6 million.

     See Note 9 -  VoiceStream  Merger for further  discussion  of the Revolving
     Credit Agreement.

7.   Tax Settlement  Agreement.  On March 12, 1999, the TDS and Aerial boards of
     directors approved a tax settlement agreement calling for payment of $114.5
     million from TDS to Aerial under the tax allocation  agreement.  The $114.5
     million received by Aerial covered the estimated tax losses incurred by the
     Company  and used by TDS for the  period  commencing  from  January 1, 1996
     through August 31, 1999. The tax  settlement  agreement  requires the final
     settlement  amount to cover tax losses  incurred  by Aerial and used by TDS
     for the period commencing January 1, 1996 and ending December 31, 1999. The
     settlement  amount  was  used  to  repay  a  portion  of the  existing  AOC
     indebtedness to TDS under the Revolving Credit Agreement.

     The payment of the $114.5 million by TDS,  partially  offset by an increase
     in deferred  income tax expense of $1.8  million,  resulted in a net income
     tax benefit of $112.7 million for 1999.

8.   Commitments.  At  September  30,  1999,  the  Company  had orders  totaling
     approximately $4.8 million with Nokia  Telecommunications  Inc. for network
     infrastructure  equipment.  Also,  at September  30, 1999,  the Company had
     orders for handsets with various  handset  vendors  totaling  approximately
     $17.8 million.

9.   VoiceStream Merger. On September 20, 1999, VoiceStream Wireless Corporation
     ("VoiceStream")  and  Aerial  announced  that  their  respective  Boards of
     Directors had approved a definitive  agreement to merge the two  companies.
     VoiceStream, the Company and TDS

                                   17

<PAGE>



     entered into a September  17, 1999,  Agreement  and Plan of  Reorganization
     pursuant to which  VoiceStream  will exchange  0.455 shares of  VoiceStream
     common stock for each of the Company's  Common and Series A Common  Shares.
     The  conversion  number is subject to  adjustment  (but not below  0.455 or
     above 0.5 of a share of  VoiceStream  common  stock) in the event  Aerial's
     merger with VoiceStream  closes prior to the closing of the proposed merger
     of  Omnipoint   Corporation  and  VoiceStream  and  the  average  price  of
     VoiceStream common stock for the 15-day trading period prior to the closing
     is less than $39.56 per share.

     Aerial public  shareholders  will have the right to elect to receive $18 in
     cash in lieu of shares of VoiceStream.  Sonera Corporation,  formerly known
     as Sonera Ltd.  ("Sonera"),  will  convert its shares in AOC into shares of
     Aerial (at a conversion ratio of 6.72919)  immediately  prior to the merger
     becoming effective. The parties anticipate that the merger will be tax free
     to Aerial  shareholders  who elect to receive  VoiceStream  stock.  TDS and
     major  shareholders  of  VoiceStream  have  agreed  to vote in favor of the
     merger. This merger is subject to shareholder approval by both companies as
     well as federal, state, and other regulatory approvals,  including those of
     the Federal Communications Commission and the Federal Trade Commission. The
     merger is expected to close in the first quarter of 2000.  The following is
     a discussion of significant  transactions  executed in  anticipation of but
     not contingent upon the merger with VoiceStream, except as indicated below.

     TDS Debt Replacement
     --------------------
     On September 17, 1999, TDS, the Company,  AOC,  VoiceStream and VoiceStream
     Wireless  Holding  Corporation   ("Holding")  entered  into  a  Debt/Equity
     Replacement Agreement (the "TDS Debt Replacement Agreement"). In accordance
     with the TDS Debt Replacement Agreement,  on November 1, 1999, TDS assigned
     to Aerial as a contribution  to capital $420 million of debt owed by AOC to
     TDS under the TDS Revolving  Credit  Agreement in exchange for an aggregate
     19,090,909 shares of Aerial common stock, at a purchase price of $22.00 per
     share.  On  September  17,  1999,  the  date  of the TDS  Debt  Replacement
     Agreement,  the closing price of Aerial Common Shares was $20.00 per share.
     The shares of Aerial  common stock  consisted of  6,166,758  Aerial  Common
     Shares  and  12,924,151  Aerial  Series A  Common  Shares.  Thereafter,  on
     November  1,1999,  Aerial  assigned to AOC as a contribution to capital the
     $420 million of debt received from TDS, as well as $75 million  received by
     Aerial from Sonera (see  "Sonera-Aerial  Investment" below) in exchange for
     an  aggregate  of  3,343,642  common  shares  of AOC.  As a result  of such
     transaction,  $420  million  of  debt  previously  owed  by AOC to TDS  was
     extinguished  and the Maximum Amount under the Revolving  Credit  Agreement
     was reduced from $775 million to $355  million.  In addition,  the interest
     rate under the Revolving  Credit Agreement was decreased to prime rate plus
     2.35%  and the  guarantee  by Aerial of AOC's  obligations  thereunder  was
     terminated. Effective at the merger closing, TDS and AOC will amend the TDS
     Revolving  Credit Agreement by entering into an Amended and Restated Credit
     Agreement.  The Amended and Restated  Credit  Agreement  will  evidence any
     loans outstanding under the TDS Revolving Credit Agreement at that time and
     the maturity date of such loans will be one year after the  effective  date
     of the Amended and Restated Credit Agreement.

     Sonera-Aerial Investment
     ------------------------
     On September 17, 1999, TDS, Aerial, AOC, VoiceStream,  Holding,  Sonera and
     Sonera Corporation U.S. ("Sonera U.S.") entered into a Settlement Agreement
     and Release providing for the Sonera-Aerial  Investment. In accordance with
     the Sonera-Aerial Investment, on

                                   18

<PAGE>



     November 1, 1999,  Sonera  invested an  aggregate of $230 million in Aerial
     and AOC at an equivalent  price of $22.00 per share of Aerial common stock.
     Aerial issued 3,409,091 Aerial common shares to Sonera in consideration for
     $75  million,  and  AOC  issued  1,046,999  shares  of  AOC  to  Sonera  in
     consideration  for $155 million.  The funds invested by Sonera were used to
     repay  outstanding  debt under the TDS Revolving  Credit  Agreement and are
     available to be drawn down by AOC under the TDS Revolving  Credit Agreement
     between November 1, 1999, and the closing of the merger.  As a result,  the
     amount  available  for  borrowing  by AOC  under the TDS  Revolving  Credit
     Agreement was $265.6 million as of November 1, 1999.  Additionally,  Sonera
     surrendered  317,108  shares  of AOC stock on  November  1,  1999,  without
     releasing its claims with respect thereto, and will surrender an additional
     317,108 shares at the closing of the merger.  At the merger  closing,  TDS,
     Aerial,  AOC,  VoiceStream  and  Holding,  on the one hand,  and Sonera and
     Sonera  U.S.,  on the other hand,  will  release each other from all claims
     relating to actions  occurring  through  September 17, 1999,  including all
     claims by Sonera to the 634,216  disputed  shares,  and, subject to certain
     exceptions,  will  extend  such  release  through  the  date of the  merger
     closing.













                                   19

<PAGE>






                           PART II. OTHER INFORMATION
                           --------------------------
Item 1. Legal Proceedings

     On September 21, 1999, Herbert Behrens, who purports to be a stockholder of
     the  Company,  filed  a  putative  class  action  complaint  on  behalf  of
     stockholders  of the  Company  in the  Court of  Chancery  of the  State of
     Delaware  in New Castle  County.  The  complaint  names as  defendants  the
     Company,  TDS, certain directors of the Company and TDS, and VoiceStream in
     connection with the transactions  contemplated by the Agreement and Plan of
     Reorganization  and the related  agreements,  particularly  the Debt/Equity
     Replacement Agreement,  which are described in Part I of the Form 10-Q. The
     complaint alleges a breach of fiduciary duties by the defendants, including
     in  connection  with the proposed  exchange of $420 million of debt owed by
     the Company to TDS for the Company  common  stock at $22.00 per share.  The
     complaint  alleges  that this  action  benefits  TDS at the  expense of the
     Company's   public   stockholders   and  seeks  to  have  the  transactions
     contemplated  by the Agreement and Plan of  Reorganization  enjoined or, if
     they are  consummated,  to have them  rescinded and to recover  unspecified
     damages,  fees and  expenses.  The Company  believes  that this  lawsuit is
     without merit and intends to vigorously defend against this lawsuit.

Item 6. Exhibits and Reports on Form 8-K.

     (a) Exhibits

         Exhibit 11 - Computation of earnings per common share.

         Exhibit 27 - Financial Data Schedule.

     (b) Reports on Form 8-K filed during the quarter ended September 30, 1999.

     The Company  filed a Current  Report on Form 8-K dated  September 28, 1999,
     for  the  purpose  of  filing  a news  release  dated  September  20,  1999
     announcing  a  merger   between  the  Company  and   VoiceStream   Wireless
     Corporation.  The Current Report also included various documents related to
     the merger as exhibits.

                                   20

<PAGE>



                                   SIGNATURES
                                   ----------
     Pursuant to the  requirements  of the Securities  Exchange Act of 1934, the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned thereunto duly authorized.


                                    AERIAL COMMUNICATIONS, INC.
                                    ---------------------------
                                          (Registrant)



Date  November 12, 1999                /s/ Donald W. Warkentin
     --------------------------        -----------------------------------------
                                       Donald W. Warkentin
                                       President
                                       (Chief Executive Officer)


Date  November 12, 1999                /s/ J. Clarke Smith
     --------------------------        -----------------------------------------
                                       J. Clarke Smith
                                       Vice President-Finance and Administration
                                       (Chief Financial Officer)


Date  November 12, 1999                /s/ B. Scott Dailey
     -------------------------         -----------------------------------------
                                       B. Scott Dailey
                                       Vice President-Controller
                                       (Principal Accounting Officer)


                                   21






                                                                      Exhibit 11

                  Aerial Communications, Inc. and Subsidiaries
                    Computation of Earnings Per Common Share
                    (in thousands, except per share amounts)
<TABLE>
<CAPTION>

Three Months Ended September 30,                                       1999                1998
- --------------------------------                                       ----                ----
Basic Earnings Per Common Share:
<S>                                                            <C>                  <C>
    Net (Loss)                                                 $       (76,181)     $      (79,137)
                                                               ================     ===============
    Weighted average number of Common and Series A
        Common Shares Outstanding (1)                                   71,928              71,735
                                                               ================     ===============
Basic Earnings Per Common Share
    Net (Loss)                                                 $         (1.06)     $        (1.10)
                                                               ================     ===============

Diluted Earnings Per Common Share:
    Net (Loss)                                                 $       (76,181)     $      (79,137)
                                                               ================     ===============
    Weighted average number of Common and Series A
        Common Shares Outstanding (1)                                   71,928              71,735
                                                               ================     ===============
Diluted Earnings Per Common Share
    Net (Loss)                                                 $         (1.06)     $        (1.10)
                                                               ================     ===============

Nine Months Ended September 30,                                        1999                1998
- -------------------------------                                        ----                ----
Basic Earnings Per Common Share:
    Net (Loss)                                                 $       (98,806)     $     (255,532)
                                                               ================     ===============
    Weighted average number of Common and Series A
        Common Shares Outstanding (1)                                   71,883              71,701
                                                               ================     ===============
Basic Earnings Per Common Share
    Net (Loss)                                                 $         (1.37)     $        (3.56)
                                                               ================     ===============

Diluted Earnings Per Common Share:
    Net (Loss)                                                 $       (98,806)     $     (255,532)
                                                               ================     ===============
    Weighted average number of Common and Series A
        Common Shares Outstanding (1)                                   71,883              71,701
                                                               ================     ===============
Diluted Earnings Per Common Share
    Net (Loss)                             ,                    $         (1.37)     $        (3.56)
                                                               ================     ===============
</TABLE>

(1)     Weighted average number of Common and Series A Common Shares outstanding
        was  calculated  based on the  number of shares  outstanding  during the
        period.



                                   22

<TABLE> <S> <C>


<ARTICLE>                     5
<LEGEND>
     This schedule  contains summary  financial  information  extracted from the
consolidated financial statements of Aerial Communications, Inc. as of September
30, 1999,  and is  qualified  in its  entirety by  reference  to such  financial
statements.
</LEGEND>

<MULTIPLIER>                                 1,000

<S>                                      <C>
<PERIOD-TYPE>                            9-mos
<FISCAL-YEAR-END>                        DEC-31-1999
<PERIOD-START>                           JAN-01-1999
<PERIOD-END>                             SEP-30-1999
<CASH>                                       7,559
<SECURITIES>                                     0
<RECEIVABLES>                               34,618
<ALLOWANCES>                                 3,479
<INVENTORY>                                  9,012
<CURRENT-ASSETS>                            51,815
<PP&E>                                     788,927
<DEPRECIATION>                            (173,561)
<TOTAL-ASSETS>                             953,736
<CURRENT-LIABILITIES>                      149,157
<BONDS>                                    246,123
                            0
                                      0
<COMMON>                                    71,969
<OTHER-SE>                                (142,779)
<TOTAL-LIABILITY-AND-EQUITY>               953,736
<SALES>                                     21,134
<TOTAL-REVENUES>                           162,103
<CGS>                                       39,671
<TOTAL-COSTS>                              307,918
<OTHER-EXPENSES>                            (2,656)
<LOSS-PROVISION>                                 0
<INTEREST-EXPENSE>                          68,301
<INCOME-PRETAX>                           (211,460)
<INCOME-TAX>                              (112,654)
<INCOME-CONTINUING>                        (98,806)
<DISCONTINUED>                                   0
<EXTRAORDINARY>                                  0
<CHANGES>                                        0
<NET-INCOME>                               (98,806)
<EPS-BASIC>                                (1.37)
<EPS-DILUTED>                                (1.37)



</TABLE>


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