AERIAL COMMUNICATIONS INC
10-Q, 1998-08-10
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         June 30, 1998
                               ---------------------------------
                                       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 July 31, 1998
   ---------------------------                  ----------------------------
   Common Shares, $1 par value                     31,733,362 Shares
Series A Common Shares, $1 par value               40,000,000 Shares

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




<PAGE>



                           AERIAL COMMUNICATIONS, INC.
                           ---------------------------

                         2nd QUARTER REPORT ON FORM 10Q
                         ------------------------------ 

                                      INDEX
                                      ----- 

                                                                       Page No.
                                                                       --------

Part I.           Financial Information

                  Management's Discussion and Analysis of
                     Results of Operations and Financial Condition        2-9

                  Consolidated Statements of Operations -
                     Three Months and Six Months Ended June 30,
                     1998 and 1997                                         10

                  Consolidated Statements of Cash Flows -
                     Six Months Ended June 30, 1998 and 1997               11

                  Consolidated Balance Sheets -
                     June 30, 1998 and December 31, 1997                   12

                  Notes to Consolidated Financial Statements            13-15


Part II.          Other Information                                     16-17

Signatures                                                                 18



<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 82.4%- owned  subsidiary  of Telephone and Data Systems,  Inc.  ("TDS"),  was
formed to acquire  Personal  Communications  Services  ("PCS") licenses from the
Federal Communications  Commission ("FCC"),  construct PCS networks in its Major
Trading Areas ("MTAs") and offer wireless PCS  communications  services in these
areas.

Since its  acquisition of PCS licenses in the FCC broadband  Block A and Block B
PCS auction,  which  concluded in March of 1995, the Company devoted its efforts
to  recruiting  an  experienced  management  team,  developing  and  executing a
business plan,  raising capital and designing and  constructing a PCS network in
each  of  its  MTAs   (Minneapolis,   Tampa-St.   Petersburg-Orlando,   Houston,
Pittsburgh,  Kansas City and  Columbus).  The Columbus  MTA launched  service on
March 27, 1997. The Company's  five  remaining MTAs launched  service during the
second quarter of 1997.

With the launch of service in its MTAs  during the second  quarter of 1997,  the
Company   transitioned   from  the  development  stage  to  being  an  operating
enterprise.  As a result of this  transition,  the  Company has  experienced  an
increase in revenues and operating expenses and incurred substantial losses. The
Company had substantially  less revenues and expenses in the first half of 1997.
In  addition,   significant   efforts  to  build-out   the   Company's   network
infrastructure continued throughout the second half of 1997.

The Company's  focus in 1998 has been the completion of its PCS networks and the
development  of its PCS business.  Following is a table of summarized  operating
data for the Company's consolidated operations.
<TABLE>
<CAPTION>
                                                 Six Months Ended or At June 30,
                                                 -------------------------------
                                                         1998          1997
                                                         ----          ----
<S>                                                   <C>            <C> 
Total MTA population (in millions)                       27.6          27.6
Customers                                             204,000        28,000
Average revenue per customer (year to date)               $53           N/M
Average revenue per customer (quarter to date)            $51           N/M
MTA penetration                                         0.74%         0.10%
MTAs in operation                                           6             6
Cell sites in service                                   1,133           600
Total number of employees                               1,451         1,090
<FN>
       N/M - not meaningful 
</FN>
</TABLE>



                                        2

<PAGE>



Six Months Ended 6/30/98 Compared to Six Months Ended 6/30/97

Operating Revenues
- ------------------

Operating  revenues  totaled $67.4 million in 1998, an increase of $60.3 million
as compared to 1997.  The increase in operating  revenues is  reflective  of the
Company's  launch of service  between March and June of 1997 and the  subsequent
significant efforts to build its customer base.

Service  revenue  primarily  consists  of i) charges  for  access,  air time and
value-added  services  provided to the  Company's  customers who use the network
operated by the Company  (local  service  revenue);  ii) charges to customers of
other  wireless  carriers  who  use  the  Company's  PCS  network  when  roaming
(outcollect  roaming revenue);  and iii) charges for long-distance calls made on
the Company's  systems (long distance  revenue).  Service  revenue totaled $52.9
million in 1998, an increase of $51.8 million as compared to 1997.  The increase
was driven by  increases in local and long  distance  revenue as a result of the
growth in the number of customers using the Company's PCS network during 1998 as
compared to 1997. As of June 30, 1998, the Company had 204,000 customers and had
been providing service in all of its markets throughout the entire first half of
1998. As of June 30, 1997,  the Company had 28,000  customers,  after  launching
service in all markets between late March and late June of 1997.

The Company's  average revenue per customer ("ARPU") was $53 and $51 for the six
months and three months ended June 30, 1998,  respectively.  It is expected that
ARPU will  continue  to  decline  somewhat  before  stabilizing  as the  Company
continues to add more moderate wireless users.

Equipment sales revenue represents the sale of handsets and related  accessories
to  retailers,  independent  agents,  and end user  customers.  Equipment  sales
totaled  $14.5 million in 1998, an increase of $8.5 million as compared to 1997.
The increase in Equipment sales revenue reflects the sale of 147,000 handsets in
1998 as compared to 47,000 in 1997.  The  increased  sales volume was  partially
offset by a decline in handset prices.

Operating Expenses
- ------------------

Operating expenses totaled $204.2 million in 1998, an increase of $123.8 million
as compared to 1997.  The increase in operating  expenses is  reflective  of the
Company's  launch of service  between March and June of 1997 and the  subsequent
significant efforts to build its customer base.

System  operations  expense  totaled $32.6 million in 1998, an increase of $27.7
million as compared to 1997. The increase in system operations expense is due to
the increasing size of the Company's  network and its fully  operational  status
during the first half of 1998 as compared to the first half of 1997.  As of June
30, 1998, the Company's PCS network had 1,133 cell sites in service and had been
operational in all of the Company's markets  throughout the entire first half of
1998. As of June 30, 1997, the network had  approximately 600 cell sites and had
become operational across all markets between late March and late June of 1997.


                                        3

<PAGE>



Customer  usage  expense  increased  $10.3  million  in 1998  due  primarily  to
increased landline  interconnection  and toll charges,  reflecting an increasing
customer  base and  increased  use of the  Company's  network by its  customers.
Significant system operations expenses include cell site rent expense and system
maintenance expense which increased $4.8 million and $3.2 million, respectively,
in 1998 as  compared  to 1997.  Salaries  and other  employee  related  expenses
increased  $6.2 million,  primarily  reflecting an increase in  engineering  and
maintenance  personnel  since June 30,  1997,  as well as a decrease in internal
labor costs  capitalized.  Other  systems  operations  expenses  increased  $3.2
million and include charges such as cell site utility expense, vehicle and other
maintenance expense and roamer fraud expense.

Marketing  and selling  expense  totaled  $35.4  million in 1998, an increase of
$19.5 million as compared to 1997.  Significant  Marketing and selling  expenses
include the salaries, benefits and other employee related expenses for sales and
marketing personnel,  which increased $8.1 million in 1998, primarily reflecting
an  increase  in sales  and  marketing  personnel  since  June 30,  1997.  Sales
commissions  increased $3.4 million in 1998,  reflecting  the Company's  growing
customer  base.  Retail  store  rental  costs  increased  $2.3  million  in 1998
primarily due to the Company's  increasing  number of store and kiosk  locations
across its markets.  Other  Marketing and selling  expense items  increased $5.7
million in aggregate,  primarily  driven by increases in  consulting,  temporary
service, advertising and other sales expenses.

Customer  service  expense  totaled  $23.6 million in 1998, an increase of $21.3
million as compared to 1997. The increase was driven by rapid  customer  growth,
and the  efforts to manage  that  growth  with  personnel  and new and  evolving
information systems.  The higher than anticipated level of customer service
expense reflects primarily the effects of higher than planned customer churn and
related bad debt costs as well as additional consulting and temporary service
expenses directed at reducing both customer churn and bad debts.  

Cost of  equipment  sold  totaled  $43.4  million in 1998,  an increase of $28.4
million as compared  to 1997.  The  increase  primarily  reflects  the growth in
handset unit sales to support the rise in customer activations.

General and administrative  expense totaled $28.2 million in 1998, a decrease of
$2.4 million as compared to 1997.  General and  administrative  expenses include
the costs of operating the Company's  local  business  offices and its corporate
expenses other than the corporate  engineering  and marketing  departments.  The
decrease is attributable to the Company being a development stage company in the
first quarter of 1997 and classifying  all operating  expenses as either General
and  administrative  or  Development  costs.  Effective in the second quarter of
1997,  the  Company  prospectively  began  classifying  expenses  to reflect its
operational status.

Depreciation  expense was $37.2 million in 1998, an increase of $32.0 million as
compared to 1997. The increase is due to rising fixed asset balances as a result
of the Company's network  buildout.  As of June 30, 1998, the Company had $667.6
million of property and equipment in service which had largely been  operational
throughout  the entire first half of 1998. As of June 30, 1997,  the Company had
$453.9 million of property and equipment in service,  the PCS network portion of
which had been in operation for less than half of the period.


                                        4

<PAGE>



Amortization  expense was $3.8  million in 1998,  an increase of $3.1 million as
compared to 1997. Upon the commencement of service in a particular  market,  the
Company began  amortizing  that market's  related PCS license.  Aerial  launched
service  across all its markets  between late March and late June of 1997.  As a
result,  year to date  consolidated  amortization  expense in 1997 reflects less
than a full quarter's expense.  In 1998, all markets were operational the entire
first half of the year resulting in greater amortization expense.

Development  costs  totaled  $5.8  million  in  1997  and  primarily   represent
pre-launch  marketing,  consulting  and legal  costs.  Effective  in the  second
quarter  of 1997,  the  Company  was no longer a  development  stage  entity and
prospectively began classifying expenses to reflect its operational status.

Operating (Loss)
- ----------------

Operating  (Loss) totaled $(136.8) million in 1998, an increase of $63.5 million
as compared to 1997.  Although service revenues are expected to continue to grow
during the  remainder  of 1998 as the  Company  builds its  customer  base,  the
Company  expects to continue to have operating  losses and to generate  negative
cash flow in 1998 and for the next few years as it incurs costs  associated with
that growth.

Interest and Income Taxes
- -------------------------

Interest  expense-affiliate  totaled $29.8 million in 1998, an increase of $26.9
million as compared to 1997. 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, less
capitalized  interest.  The average  balance of  borrowings  under the Revolving
Credit  Agreement was greater in 1998 as compared to 1997,  resulting in greater
interest  expense.  Additionally,  the Company  capitalized $2.6 million less in
interest in 1998 as compared to 1997.

Interest expense-other totaled $8.4 million in 1998, an increase of $7.3 million
as compared to 1997. Interest expense-other relates to interest expense accreted
on the Series A Zero Coupon Notes issued in November  1996 and the Series B Zero
Coupon Notes issued in February 1998 as well as interest expense associated with
interim  financing  under the Nokia  1996  Credit  Agreement,  less  capitalized
interest. The increase is primarily due to the average balance of Long-term debt
outstanding  during  1998 being  greater  than the average  balance  outstanding
during 1997. Additionally, the Company capitalized $2.9 million less in interest
in 1998 as compared to 1997.

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  under  which the
Company is able to carry  forward  any losses and credits and use them to offset
any future income tax liabilities to TDS.


                                        5

<PAGE>



Net (Loss) and (Loss) Per Common and Series A Common Share
- ----------------------------------------------------------

Net (Loss)  totaled  $(176.4)  million in 1998 and $(77.8)  million in 1997. Net
(Loss) per Common and Series A Common  Share was  $(2.46) in 1998 and $(1.09) in
1997.  The increase in the Company's Net Loss and Net Loss per Common and Series
A Common Share in 1998 reflects the Company's  fully  operational  status during
the entire  first half of 1998 as  compared  to the  Company's  start-up  status
through the first quarter of 1997.


Three Months Ended 6/30/98 Compared to Three Months Ended 6/30/97

Operating Revenues
- ------------------

Operating  revenues  totaled $36.7 million in 1998, an increase of $29.5 million
as compared to 1997.  Service revenues totaled $28.9 million and equipment sales
totaled  $7.8  million in 1998,  increases  of $27.6  million and $1.9  million,
respectively,  as  compared  to the second  quarter  of 1997.  The  increase  in
operating  revenues reflects the Company's fully  operational  status during the
entire  second  quarter of 1998 as  compared to the  Company  launching  service
across all its markets between late March and late June of 1997.

Operating Expenses
- ------------------

Operating  expenses were $104.2 million in 1998, an increase of $45.4 million as
compared to 1997.  With the  exception of  Marketing  and selling  expense,  the
increase is for reasons generally the same as the first half of 1998.

Marketing  and selling  expense was $18.0  million in 1998,  an increase of $2.0
million as compared to the second quarter of 1997. Salaries,  benefits and other
employee related expenses  increased $2.9 million,  rent expense  increased $1.2
million,  sales  commissions  increased  $1.1  million and other sales  expenses
increased  $2.0 million in 1998.  These  increases  were  partially  offset by a
decrease in advertising  expense of $5.2 million in 1998. The decrease is due to
the significant  amount of advertising  expense the Company  incurred as part of
its aggressive marketing campaign in the second quarter of 1997 that accompanied
the launch of service.

Net (Loss) and (Loss) Per Common and Series A Common Share
- ----------------------------------------------------------

Net (Loss)  totaled  $(89.5)  million in 1998 and $(55.5)  million in 1997.  Net
(Loss) per Common and Series A Common  Share was  $(1.25) in 1998 and $(0.78) in
1997.  The  increase  in the  Company's  Net Loss and Net Loss per share in 1998
reflects the  Company's  fully  operational  status in during the entire  second
quarter of 1998.  In 1997,  the  Company  launched  service  in all its  markets
between late March and late June.



                                        6

<PAGE>



LIQUIDITY AND CAPITAL RESOURCES
- -------------------------------

The costs of development,  construction,  start-up and post-launch activities of
the Company require substantial  capital.  From inception through June 30, 1998,
the Company had expended $304.4 million for its licenses,  including capitalized
interest,  $691.4  million  for all  other  capital  expenditures  and  incurred
cumulative  net losses of $469.3  million.  The  Company  expects to continue to
incur operating losses and generate negative cash flow from operating activities
during the next few years as it continues to build its customer base.

Cash flows used by  operating  activities  were  $118.8  million  during 1998 as
compared to $86.1 million in 1997. Operating cash outflow (operating loss before
depreciation and amortization expense) totaled $95.8 million in 1998 as compared
to $67.4  million  in  1997.  Cash  flows  used by  other  operating  activities
(investment and other income,  interest expense,  changes in working capital and
changes in other assets and  liabilities)  required  cash  investments  of $23.0
million in 1998 as compared to $18.7 million in 1997.

Cash flows from financing  activities totaled $162.6 million in 1998 as compared
to $213.0  million in 1997.  Cash  provided in 1998 was due  primarily to $161.8
million in borrowings under the Revolving Credit Agreement.  In 1997, borrowings
under the Revolving Credit Agreement provided $210.2 million.

Cash  flows  used in  investing  activities  totaled  $46.9  million  in 1998 as
compared to $158.4 million in 1997. Cash used in 1998 and 1997 was due primarily
to additions to property and  equipment for PCS network and  information  system
assets.  Fixed asset additions were financed  primarily by borrowings  under the
Revolving  Credit  Agreement  with TDS and the Series A and Series B Zero Coupon
Notes.

The Company anticipates that the continuing development of its PCS services will
require substantial capital over the next few years. For all of 1998 the Company
estimates  that the funds  required  for  construction  expenditures  will total
approximately $80 to $100 million.  The Company estimates requiring $255 million
for working capital requirements to fund operations for all of 1998.

Nokia Telecommunications Inc. ("Nokia") agreed to provide the Company with up to
$200 million in financing for digital radio channel and switching infrastructure
equipment through a Credit Agreement with the Company dated June 19, 1996 ("1996
Credit  Agreement").  In  accordance  with the  provisions  of the  1996  Credit
Agreement,  the Company  issued,  in  tranches,  10-year  unsecured  zero coupon
promissory  notes,  the proceeds of which were paid to Nokia in  satisfaction of
borrowings by the Company under the 1996 Credit Agreement.  On November 4, 1996,
the Company issued $226.2 million in aggregate  principal  amount at maturity of
Series A Zero Coupon Notes  ("Series A Notes") due in 2006. On February 5, 1998,
the Company issued $222.0 million in aggregate  principal  amount at maturity of
Series B Zero  Coupon  Notes  ("Series B Notes") due in 2008  (representing  the
final  issuance of zero  coupon  notes  under the 1996  Credit  Agreement).  The
aggregate  issue price of the Series A and Series B Zero  Coupon  Notes was $200
million. The proceeds were paid to Nokia in satisfaction of all then outstanding
and future  obligations  of the Company up to $200 million under the 1996 Credit
Agreement.


                                       7

<PAGE>



On June 30, 1998, the Company and 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 $75 million  tranches.  With respect to Tranche A, the Company
may borrow up to $75 million until June 30, 1999. Tranche A loans mature on June
30, 1999, however,  the maturity date of Tranche A loans may be extended to June
30, 2000,  upon written notice and payment of an extension fee by the Company to
Nokia. A second $75 million ("Tranche B") becomes  available  commencing on June
30, 1999, and ending on June 30, 2000, the maturity date of Tranche B loans. The
obligations  of the  Company  under  the 1998  Credit  Agreement  are  fully and
unconditionally  guaranteed  by TDS at an  annual  fee rate of 3% (See  Note 6 -
Vendor Financing for further  discussion).  As of June 30, 1998, the Company had
$57.8 million  available  for borrowing  under the Tranche A portion of the 1998
Credit Agreement with Nokia.

On June 1, 1998, the Company and Sonera Corporation ("Sonera"), formerly Telecom
Finland Ltd.,  signed a definitive  purchase  agreement  under which Sonera will
make a $200  million  investment  in  Aerial  Operating  Co.,  Inc.  ("AOC"),  a
wholly-owned  subsidiary  of the Company.  Upon  closing,  Sonera will  purchase
approximately  2.4 million  shares of common stock of AOC at a purchase price of
approximately  $83 per share  representing a 19.423% equity interest in AOC (See
Note 7- Minority Investor for further discussion).

At June 30, 1998,  the Company had borrowed  $610.1  million under its Revolving
Credit  Agreement  with TDS.  During the second  quarter  of 1998,  the  Company
secured from TDS a $200 million total increase in the amount it may borrow under
the Revolving Credit  Agreement to $750 million.  The Revolving Credit Agreement
authorizes  increases  on a scheduled  basis to $640  million at June 30,  1998,
rising to $750  million on and after  October 31,  1998.  The  Revolving  Credit
Agreement also provides that the amount of any proceeds raised by the Company in
connection  with the sale of equity to any third  party  (See Note 7 -  Minority
Investor),  and the amount of any  proceeds  from the issuance by the Company of
any debt to any third  party,  will be used to reduce the  borrowings  under the
Revolving  Credit  Agreement  as well as reduce the total amount the Company may
borrow under the Revolving Credit Agreement.  Additionally, any borrowings under
vendor  financing  arrangements  (See  Note 6 - Vendor  Financing)  concurrently
reduces by the same amount the authorized  total line of credit available to the
Company under the Revolving Credit  Agreement.  As of June 30, 1998, the Company
had $12.7 million  available for borrowing under the Revolving  Credit Agreement
with TDS,  net of $17.2  million  in  vendor  financing  under  the 1998  Credit
Agreement with Nokia.

The  Company  believes  its capital  resources  will be  sufficient  to fund its
capital  expenditures and cover operating losses through the end of the year. If
sufficient future funding is not available on terms and prices acceptable to the
Company, the Company would have to reduce its operating activities,  which could
have a material adverse impact on the Company's  financial condition and results
of future operations.



                                        8

<PAGE>



TRACKING STOCK PROPOSAL
- -----------------------

As disclosed in the  Company's  1997 Annual Report on Form 10-K, on December 17,
1997, the Company  received a proposal from TDS to acquire all of the issued and
outstanding  Common  Shares of Aerial not  already  owned by TDS,  pursuant to a
merger  between the Company  and a TDS  subsidiary  (the  "Aerial  Merger"),  in
exchange  for shares of TDS  tracking  stock  which are  intended to reflect the
performance of the Company.

In January 1998, the Company's Board of Directors created a special committee of
the Board (the "Special Committee") to review the proposal from TDS. The Special
Committee,  consisting  of  two  independent  directors  of  Aerial,  engaged  a
financial  advisor and legal  advisor to assist in reviewing  the  proposal.  On
April 15, 1998, the Company  announced that the Special Committee had decided to
recommend that Aerial's Board of Directors reject the initial proposal from TDS.
The  Special  Committee  advised  TDS that it would be  prepared  to  consider a
revised  proposal.  TDS has indicated that it intends to make a revised proposal
to the Special  Committee  and to continue to seek an  agreement  to acquire the
Aerial Common Shares that it does not own on mutually acceptable terms. However,
there can be no assurance  that an agreement will be reached with respect to the
Aerial Merger.











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;  and  unanticipated  changes in growth in PCS
customers,  penetration  rates, churn rates and the mix of products and services
offered in the Company's  markets.  Readers  should  evaluate any  statements in
light of these important factors.

                                        9

<PAGE>



<TABLE>
                  AERIAL COMMUNICATIONS, INC. AND SUBSIDIARIES
                      CONSOLIDATED STATEMENTS OF OPERATIONS
                                    Unaudited
                                    ---------

<CAPTION>
                                                    Three Months Ended        Six Months Ended
                                                         June 30,                 June 30,
                                                  ----------------------    ----------------------
                                                     1998         1997        1998         1997
                                                  ---------    ---------    ---------    ---------
                                                    (Dollars in thousands, except per share amounts)
<S>                                               <C>          <C>          <C>          <C>
OPERATING REVENUES
    Service                                       $  28,852    $   1,182    $  52,935    $   1,182
    Equipment sales                                   7,836        5,961       14,499        5,961
                                                  ---------    ---------    ---------    ---------
        Total Operating Revenues                     36,688        7,143       67,434        7,143

OPERATING EXPENSES
    System operations                                17,593        4,876       32,609        4,876
    Marketing and selling                            17,974       15,958       35,406       15,958
    Customer service                                 12,752        2,364       23,651        2,364
    Cost of equipment sold                           20,573       14,972       43,393       14,972
    General and administrative                       14,014       14,037       28,210       30,564
    Depreciation                                     19,356        5,161       37,163        5,161
    Amortization of intangibles                       1,888          722        3,777          722
    Development costs                                    --          686           --        5,773
                                                  ---------    ---------    ---------    ---------
        Total Operating Expenses                    104,150       58,776      204,209       80,390
                                                  ---------    ---------    ---------    ---------

OPERATING (LOSS)                                    (67,462)     (51,633)    (136,775)     (73,247)

INVESTMENT AND OTHER INCOME (EXPENSE)
    Investment (losses)                                  --         (583)          --       (1,052)
    Interest income-affiliate                            --           --           --           95
    Interest income-other                               303          810          663        1,932
    Other (expense)                                  (1,009)          --         (337)          --
                                                  ---------    ---------    ---------    ---------
    Total Investment and Other Income (Expense)        (706)         227          326          975
                                                  ---------    ---------    ---------    ---------

(LOSS) BEFORE INTEREST AND INCOME  TAXES            (68,168)     (51,406)    (136,449)     (72,272)

INTEREST EXPENSE
    Interest expense-affiliate                       16,169        2,286       29,842        2,920
    Interest expense-other                            4,251          696        8,358        1,098
                                                  ---------    ---------    ---------    ---------
        Total Interest Expense                       20,420        2,982       38,200        4,018
                                                  ---------    ---------    ---------    ---------

(LOSS) BEFORE INCOME TAXES                          (88,588)     (54,388)    (174,649)     (76,290)
    Income tax expense                                  886        1,087        1,746        1,525
                                                  ---------    ---------    ---------    ---------
NET (LOSS)                                         ($89,474)    ($55,475)   ($176,395)    ($77,815)
                                                  =========    =========    =========    =========

WEIGHTED AVERAGE COMMON AND
    SERIES A COMMON SHARES (000s)                    71,730       71,499       71,683       71,442
(LOSS) PER COMMON AND
    SERIES A COMMON SHARE                            ($1.25)      ($0.78)      ($2.46)      ($1.09)
                                                  =========    =========    =========    =========


<FN>
The accompanying notes to consolidated financial statements are an integral part of these statements.
</FN>
</TABLE>

                                       10

<PAGE>



<TABLE>
                  AERIAL COMMUNICATIONS, INC. AND SUBSIDIARIES
                      CONSOLIDATED STATEMENTS OF CASH FLOWS
                                    Unaudited
                                    ---------

<CAPTION>
                                                           Six Months ended
                                                               June 30,
                                                           -----------------
                                                           1998         1997
                                                           ----         ----
                                                        (Dollars in Thousands)
<S>                                                    <C>          <C>
CASH FLOWS FROM OPERATING ACTIVITIES
    Net (Loss)                                         ($176,395)    ($77,815)
    Add (Deduct) adjustments to reconcile net (loss)
        to net cash (used) by operating activities
    Depreciation and amortization                         40,940        5,883
    Noncash interest expense - Series A & B Notes          7,565        4,061
    Deferred taxes                                         1,746        1,526
    Loss on sale of property and equipment                   420        1,052
    Change in accounts receivable-customer                (2,498)      (5,138)
    Change in inventory                                   13,188       (9,743)
    Change in accounts payable-affiliates                     18        1,472
    Change in accounts payable-trade                      (7,754)      (8,880)
    Change in accrued interest-affiliate                   1,320        1,485
    Change in other assets and liabilities                 2,665          (49)
                                                       ---------    ---------
                                                        (118,785)     (86,146)
                                                       ---------    ---------
CASH FLOWS FROM FINANCING ACTIVITIES
    Change in Revolving Credit Agreement-TDS             161,831      210,201
    Change in note receivable-other                           --        1,925
    Issuance of common stock                                 816          914
                                                       ---------    ---------
                                                         162,647      213,040
                                                       ---------    ---------

CASH FLOWS FROM INVESTING ACTIVITIES
    Additions to property and equipment                  (48,061)    (157,702)
    Proceeds from sale of property and equipment             298           --
    Change in temporary cash and other investments           868         (654)
                                                       ---------    ---------
                                                         (46,895)    (158,356)
                                                       ---------    ---------
NET (DECREASE) IN CASH AND CASH
    EQUIVALENTS                                           (3,033)     (31,462)
CASH AND CASH EQUIVALENTS-
    Beginning of period                                    5,012       35,284
                                                       ---------    ---------
    End of period                                      $   1,979    $   3,822
                                                       =========    =========




<FN>
The accompanying notes to consolidated financial statements are an integral part of these statements.
</FN>
</TABLE>




                                       11

<PAGE>



<TABLE>
                  AERIAL COMMUNICATIONS, INC. AND SUBSIDIARIES
                           CONSOLIDATED BALANCE SHEETS
<CAPTION>
                                   
                                                                      (Unaudited)
                                                                     June 30, 1998  December 31, 1997
                                                                     -------------  -----------------
                                                                         (Dollars in Thousands)
<S>                                                                  <C>            <C>
ASSETS                                                                   
CURRENT ASSETS
    Cash and cash equivalents                                        $     1,979    $    5,012
    Temporary cash investments                                               117           197
    Accounts receivable
        Customer, less allowance of $17,709 and $7,252, respectively      26,528        24,030
        Roaming                                                              703            --
        Affiliates                                                             8            22
        Other                                                                367           185
    Inventory                                                             12,761        25,949
    Prepaid rent                                                           2,908         1,630
    Other                                                                  1,609           984
                                                                     -----------    ----------
                                                                          46,980        58,009
                                                                     -----------    ----------
PROPERTY and EQUIPMENT
    Property and equipment-net of accumulated
        depreciation of $75,102 and $38,018, respectively                592,503       584,723
    Work in process                                                       22,942        19,381
                                                                     -----------    ----------
                                                                         615,445       604,104
                                                                     -----------    ----------
INVESTMENTS
    Investment in PCS licenses-net of
        accumulated amortization of $8,266 and $4,489, respectively      293,266       297,043
    Other                                                                    510         1,298
                                                                     -----------    ----------  
                                                                         293,776       298,341
                                                                     -----------    ----------
DEFERRED COSTS                                                             1,197           194
                                                                     -----------    ----------
TOTAL ASSETS                                                         $   957,398    $  960,648
                                                                     ===========    ==========                             
LIABILITIES AND SHAREHOLDERS' EQUITY
CURRENT LIABILITIES
    Accounts payable
        Affiliates                                                   $       791    $      773
        Trade                                                             47,453        92,020
    Accrued interest-affiliate                                             4,985         3,665
    Accrued compensation                                                   5,353         3,414
    Accrued taxes                                                          4,248         1,957
    Microwave relocation costs payable                                     8,221         7,354
    Other                                                                  2,762           586
                                                                     -----------    ----------
                                                                          73,813       109,769
                                                                     -----------    ----------
REVOLVING CREDIT AGREEMENT-TDS                                           610,065       448,234
                                                                     -----------    ----------
LONG TERM DEBT                                                           241,147       196,439
                                                                     -----------    ----------
DEFERRED TAX LIABILITY-NET                                                15,525        13,779
                                                                     -----------    ----------
COMMON SHAREHOLDERS' EQUITY
    Common Shares, par value $1.00 per share                              31,733        31,611
    Series A Common Shares, par value $1.00 per share                     40,000        40,000
    Additional paid-in capital                                           414,440       413,746
    Retained deficit                                                    (469,325)     (292,930)
                                                                     -----------    ----------
                                                                          16,848       192,427
                                                                     -----------    ----------
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY                           $   957,398    $  960,648
                                                                     ===========    ==========

<FN>
The accompanying notes to consolidated financial statements are an integral part of these statements.
</FN>
</TABLE>


                                       12

<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 June 30, 1998, and December 31,
     1997, the results of operations for the six and three months ended June 30,
     1998 and 1997,  and the cash flows for the six months  ended June 30,  1998
     and 1997. The results of operations for the six and three months ended June
     30,  1998 and 1997,  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 six and three
     months  ended June 30, 1998 and 1997,  was  computed  based on the weighted
     average number of Common and Series A Common Shares  outstanding during the
     period.

3.   The Company adopted in 1998 Statement of Financial Accounting Standards No.
     130, "Reporting  Comprehensive  Income." Comprehensive Income (Loss) equals
     Net (Loss) for the six and three months ended June 30, 1998 and 1997.

4.   Supplemental Cash Flow Information.  Additions to Property and equipment of
     $38.0  million were financed  through a $0.9 million  increase in Microwave
     relocation costs payable and a $37.1 million increase in Long-term debt.

     In the first half of 1998, the Company  incurred  interest charges totaling
     $38.3 million. The interest charges were comprised of $26.8 million related
     to the Revolving  Credit Agreement with TDS, $3.1 million for TDS guarantee
     fees on the Series A and Series B Zero Coupon Notes and  obligations  under
     the Nokia 1996 Credit  Agreement,  $0.4  million paid to Nokia for interest
     charges  relating to the 1996 Credit  Agreement,  $7.5  million in accreted
     interest on the Series A and Series B Zero Coupon Notes and $0.5 million in
     other interest  charges.  Of these amounts,  the Company  capitalized  $0.1
     million relating to its work in process  expenditures.  The remaining $38.2
     million was charged to expense.

     During the first half of 1997,  the Company  incurred  interest  charges of
     $9.6 million.  The interest charges were comprised of $4.0 million relating
     to the Revolving  Credit Agreement with TDS, $1.5 million for TDS guarantee
     fees on the  Series A Zero  Coupon  Notes  and  $4.1  million  in  accreted
     interest on the Series A Zero Coupon Notes.  Of these amounts,  the Company
     capitalized $5.6 million relating to its work in process expenditures.  The
     remaining $4.0 million was charged to expense.  The Company  converted $1.5
     million in accrued TDS guarantee  fees to debt under the  Revolving  Credit
     Agreement in the first half of 1997.


                                       13

<PAGE>



5.   Development  Stage  Company.  Effective in the second  quarter of 1997, the
     Company  ceased to be a development  stage company and presents  subsequent
     results  of  operations,  cash  flows and  financial  position  in a manner
     similar to other operating enterprises within the industry.

6.   Vendor   Financing.   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 $75  million  tranches.  With  respect to
     Tranche A, the Company may borrow up to $75  million  until June 30,  1999.
     Tranche A loans mature on June 30,  1999,  however,  the  maturity  date of
     Tranche A loans may be extended to June 30, 2000,  upon written  notice and
     payment of an extension  fee by the Company to Nokia.  A second $75 million
     ("Tranche B") becomes available  commencing on June 30, 1999, and ending on
     June 30, 2000,  the maturity  date of Tranche B loans.  Interest  under the
     1998 Credit  Agreement is payable  monthly at a per annum rate equal to the
     30 day London Interbank  Offered Rate ("LIBOR") plus 0.25% (the "Eurodollar
     margin").  The  Eurodollar  margin on any  Tranche A loans with an extended
     maturity date is subject to  adjustment  based on ratings for TDS long-term
     senior unsecured debt.

     The  obligations  of the Company under the 1998 Credit  Agreement are fully
     and  unconditionally  guaranteed  by  TDS  at an  annual  fee  rate  of 3%.
     Guarantee fees owed TDS are payable semiannually.  Of the $241.1 million in
     Long-term debt at June 30, 1998, $17.2 million represents  borrowings under
     the 1998 Credit Agreement,  with the balance  representing the Series A and
     Series B Zero Coupon Notes, including accreted interest.

7.   Minority  Investor.  On June 1, 1998,  the Company  and Sonera  Corporation
     ("Sonera"),  formerly  Telecom Finland Ltd.,  signed a definitive  purchase
     agreement under which Sonera will make a $200 million  investment in Aerial
     Operating Co., Inc. ("AOC"), a wholly-owned subsidiary of the Company. Upon
     closing,  Sonera will purchase  approximately  2.4 million shares of common
     stock  of  AOC  at  a  purchase  price  of  approximately   $83  per  share
     representing a 19.423% equity interest in AOC. The Aerial  equivalent price
     per share and Aerial equivalent equity ownership  percentage for Sonera are
     subject to adjustment  based on Aerial's  20-day average stock price during
     the three  years  commencing  the day of  closing.  Depending  on the stock
     price,  Sonera's  equivalent  equity ownership amount in Aerial could range
     from 18.452% based on a low price of $12.33 per equivalent  Aerial share to
     14.329% based on a high price of $16.68 per  equivalent  Aerial  share.  In
     addition,  after five years  Sonera's  equity in Aerial  Operating  Company
     becomes  incrementally  exchangeable  for equity in Aerial  Communications,
     Inc. or, in certain circumstances, incrementally exchangeable for equity in
     Telephone and Data Systems, Inc. or cash. The purchase agreement is subject
     to regulatory approval.

8.   Revolving  Credit  Agreement.  The Company entered into a Revolving  Credit
     Agreement  with TDS on August 1, 1995,  under which all of the  outstanding
     obligations  of the  Company  to TDS are  incorporated.  During  the second
     quarter of 1998, the Company secured from TDS a $200 million total increase
     in the amount it may borrow under the  Revolving  Credit  Agreement to $750
     million. The Revolving Credit Agreement authorizes increases on a scheduled
     basis to $640 million on June 30, 1998, rising to $750 million on and after
     October 31, 1998.  The Revolving  Credit  Agreement  also provides that the
     amount of any proceeds raised by the Company in connection with the sale of
     equity to any third party (See Note 7- Minority  Investor),  and the amount
     of any  proceeds  from the issuance by the Company of any debt to any third
     party,  will be used to reduce the  borrowings  under the Revolving  Credit
     Agreement  as well as reduce the total  amount the Company may borrow under
     the Revolving Credit Agreement.  Additionally,  any borrowings under vendor
     financing arrangements (See Note 6 - Vendor Financing) concurrently reduces
     by the same amount the  authorized  total line of credit  available  to the
     Company under the Revolving Credit Agreement.  The total amount advanced to
     the Company  under the Revolving  Credit  Agreement as of June 30, 1998 was
     $610.1 million.


                                       14

<PAGE>



9.   Commitments.   At  June  30,   1998,   the  Company  had  orders   totaling
     approximately $5.6 million with Nokia  Telecommunications  Inc. for network
     infrastructure  equipment.  Also, at June 30, 1998,  the Company had orders
     totaling  approximately  $13.6  million  with various  handset  vendors for
     handsets and accessories.

10.  Tracking Stock  Proposal.  As disclosed in the Company's 1997 Annual Report
     on Form 10-K,  on December 17, 1997,  the Company  received a proposal from
     TDS to acquire all of the issued and  outstanding  Common  Shares of Aerial
     not already  owned by TDS,  pursuant to a merger  between the Company and a
     TDS  subsidiary  (the  "Aerial  Merger"),  in  exchange  for  shares of TDS
     tracking  stock  which are  intended  to  reflect  the  performance  of the
     Company.

     In  January  1998,  the  Company's  Board of  Directors  created  a special
     committee  of the Board (the  "Special  Committee")  to review the proposal
     from TDS. The Special Committee, consisting of two independent directors of
     Aerial,  engaged  a  financial  advisor  and  legal  advisor  to  assist in
     reviewing the proposal.  On April 15, 1998, the Company  announced that the
     Special Committee had decided to recommend that Aerial's Board of Directors
     reject the initial  proposal  from TDS. The Special  Committee  advised TDS
     that it would be prepared to consider a revised proposal. TDS has indicated
     that it intends to make a revised proposal to the Special  Committee and to
     continue to seek an agreement to acquire the Aerial  Common  Shares that it
     does  not  own on  mutually  acceptable  terms.  However,  there  can be no
     assurance  that an  agreement  will be reached  with  respect to the Aerial
     Merger.


                                       15

<PAGE>



                           PART II. OTHER INFORMATION
                           --------------------------

Item 4.  Submission of Matters to a Vote of Security-Holders.

     At the Annual Meeting of Shareholders of Aerial Communications,  Inc., held
on May 11,  1998,  the  following  number  of votes  were  cast for the  matters
indicated:

1.  Election  of one Class I Director  of the  Company by the  holders of Common
Shares:


<TABLE>
<CAPTION>
                                                        Broker
          Nominee            For          Withhold     Non-vote
          -------            ---          --------     --------
      <S>                 <C>             <C>            <C>
      John D. Foster      27,379,427      274,194        -0-
</TABLE>

2.  Election of three Class I Directors of the Company by the holder of Series A
Common Shares:


<TABLE>
<CAPTION>
                                                            Broker
    Nominee                 For           Withhold         Non-vote
    -------                 ---           --------         --------
<S>                      <C>                 <C>              <C>
LeRoy T. Carlson, Jr.    600,000,000         -0-              -0-
Rudolph E. Hornacek      600,000,000         -0-              -0-
Donald W. Warkentin      600,000,000         -0-              -0-
</TABLE>


3. The  proposal  to  approve  the  Company's  amendment  to the 1996  Long-term
Incentive Plan:


<TABLE>
<CAPTION>
                                                                         Broker
                     For            Against          Abstain            Non-vote
                     ---            -------          -------            --------
<S>              <C>                <C>               <C>                 <C>
Series A       
Common Shares    600,000,000          -0-              -0-                -0-
Common Shares     27,051,425        571,517           30,679              -0-
Total            627,051,425        571,517           30,679              -0-
</TABLE>

4. The proposal to ratify the selection of Arthur  Andersen LLP as the Company's
Independent Public Accountants for the year ended December 31, 1998:


<TABLE>
<CAPTION>
                                                                       Broker
                      For            Against         Abstain          Non-vote
                      ---            -------         -------          --------
<S>               <C>                <C>              <C>               <C>
Series A              
Common Shares     600,000,000          -0-             -0-              -0-
Common Shares      27,522,433        100,235          30,953            -0-
Total             627,522,433        100,235          30,953            -0-
</TABLE>

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

     (a) Exhibits

         Exhibit 10.18 - Fourth  Amendment to the Revolving  Credit Agreement by
         and between Telephone and Data Systems, Inc. and Aerial Communications,
         Inc.

         Exhibit 11 - Computation of earnings per common share.

         Exhibit 27 - Financial Data Schedule.

                                       16

<PAGE>



     (b) Reports on Form 8-K filed during the quarter ended June 30, 1998.

         The Company filed on April 29, 1998, a Current Report on Form 8-K dated
         February 5, 1998, for purpose of filing the Trust  Indenture  Agreement
         dated February 5, 1998, between the Company,  as issuer,  Telephone and
         Data  Systems,  Inc.,  as  guarantor  and The  First  National  Bank of
         Chicago,  as trustee related to the  $219,975,000  Series B Zero Coupon
         Notes Due 2008.

         The Company filed on June 16, 1998, a Current  Report on Form 8-K dated
         June 1, 1998, for purpose of filing a Purchase  Agreement  entered into
         on June 1, 1998,  between  Aerial  Communications,  Inc., APT Operating
         Company Inc.  (renamed  Aerial  Operating  Co.,  Inc.),  a wholly owned
         subsidiary of the Company, Telephone and Data Systems, Inc., the parent
         corporation of the Company and Sonera Corporation,  a limited liability
         company  organized  under the laws of  Finland  and  formerly  known as
         Telecom Finland Ltd.
























                                       17

<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 August 10, 1998                   /s/ Donald W. Warkentin
     -------------------               -----------------------------------------
                                       Donald W. Warkentin
                                       President
                                       (Chief Executive Officer)


Date August 10, 1998                   /s/ J. Clarke Smith
     -------------------               -----------------------------------------
                                       J. Clarke Smith
                                       Vice President-Finance and Administration
                                       (Chief Financial Officer)


Date August 10, 1998                   /s/ B. Scott Dailey
     -------------------               -----------------------------------------
                                       B. Scott Dailey
                                       Controller
                                       (Principal Accounting Officer)











                                       18

<PAGE>



                                                                   Exhibit 10.18

                                Fourth Amendment
                                     to the
                           Revolving Credit Agreement
                                 by and between
        Telephone and Data Systems, Inc. and Aerial Communications, Inc.

This Fourth Amendment (the "Fourth Amendment") to the Revolving Credit Agreement
dated as of August  1,  1995,  as  previously  amended  (the  "Revolving  Credit
Agreement") by and between  Telephone and Data Systems,  Inc.  ("TDS"),  an Iowa
corporation,  and  Aerial  Communications,  Inc.,  formerly  known  as  American
Portable Telecommunications ("Company"), a Delaware corporation, is effective as
of this 11th day of May, 1998.

WHEREAS  TDS  and  the  Company  entered  into  that  certain  Revolving  Credit
Agreement, dated and made effective as of August 1, 1995, which Revolving Credit
Agreement was subsequently amended pursuant to amendment agreements respectively
dated as of December 31, 1995, August 7, 1997 and August 29, 1997; and

WHEREAS TDS continues to own certain of the issued and outstanding shares of the
capital stock of the Company; and

WHEREAS,  the Company has  identified  a need for  additional  funds and TDS has
agreed to provide the Company certain  additional  funds for specified  purposes
under terms more  particularly  set forth in the Revolving  Credit  Agreement as
heretofore amended and as proposed to be amended hereby; and

NOW,  THEREFORE,  in consideration of the premises set forth above, and for good
and  valuable  consideration,  the receipt and  sufficiency  of which are hereby
acknowledged,  and intending to be legally  bound,  TDS and the Company agree to
further amend the Revolving Credit Agreement as follows:

         1.       All  references  to  "$425,000,000.00"  shall  be  changed  to
                  references to the "Applicable Maximum Amount".

         2.       The  following  definition  shall be added to Section 10(b) in
                  the appropriate alphabetical location:

                           "Applicable  Maximum  Amount"  shall mean,  as of any
                  date of determination  the dollar amount set forth in Schedule
                  I hereto and  pertaining  to the period during which such date
                  occurs,   minus  the   aggregate   principal   amount  of  all
                  prepayments  required to be paid pursuant to the last sentence
                  of Section 2.

         3.       Schedule  I to this  Fourth  Amendment  shall  be added to the
                  Revolving Credit Agreement as Schedule I thereto.

         4.       Section 2 is amended to add the  following  provision to the 
                  end of such section:

                  Notwithstanding  the  foregoing,   the  aggregate  outstanding
                  principal balance of the loans shall be prepaid by the Company
                  concurrently  with the  Company's  receipt of all  proceeds of
                  debt or equity  securities  issued by the Company to, or loans
                  or advances  made to or for the benefit of the Company by, any
                  person or entity other than TDS or any affiliate of TDS, which
                  prepayments  shall be made by the Company in amounts  equal to
                  the gross proceeds of such  securities,  loans or advances net
                  of all  reasonable  expenses  and fees paid by the  Company in
                  connection with the closing of such transaction.



<PAGE>



         5.       All references to the  termination  date of December 31, 1998,
                  and the phrase "the second  anniversary of the date hereof" as
                  such phrase appears in Section 1, shall be changed to December
                  31, 1999.

         6.       The following provision shall be added to the end of 
                  Section 5: 

                  Notwithstanding anything in this Revolving Credit Agreement to
                  the contrary,  in the event that TDS's direct ownership of the
                  outstanding  voting equity  securities of the Company shall be
                  less  than 70%  (computed  on a  fully-diluted  basis),  TDS's
                  commitment to make additional  loans hereunder shall expire on
                  the 180th day immediately following the date of such event.

         7.       The  requirements  of  Section  7(b) (2) are  waived  for the 
                  period ending December 31, 1999.

         8.       Section  7(b)(3) is amended to delete  clause (ii)  thereof in
                  its  entirety  and to replace  such clause with the  following
                  clause:

                  (ii) indebtedness of the Company or which is guaranteed by the
                  Company if, as to the Company's obligations  thereunder,  such
                  indebtedness  is  subordinate  to  all  borrowings  and  other
                  obligations  of  the  Company  under  this  Revolving   Credit
                  Agreement  pursuant  to terms,  conditions  and  subordination
                  agreements  acceptable  to TDS,  unless  otherwise  waived  in
                  writing by TDS;

All other terms and conditions of the Revolving  Credit  Agreement  shall remain
unchanged  and in full force and effect.  All  defined  terms  contained  in the
Revolving Credit  Agreement  hereby are incorporated  into this Fourth Amendment
and shall have the same  meaning  herein as in the  Revolving  Credit  Agreement
unless otherwise defined herein.

IN  WITNESS   WHEREOF,   the   parties   hereto,   by  their   duly   authorized
representatives,  have  executed this Fourth  Amendment to the Revolving  Credit
Agreement, effective as of the date first written above.

Telephone and Data Systems, Inc.                     Aerial Communications, Inc


By: /s/ Murray L. Swanson                            By: /s/ J. Clarke Smith
   -----------------------------                        ------------------------
Name:  Murray L. Swanson                             Name:  J. Clarke Smith
Title: Executive Vice President-Finance              Title:  Vice President-
                                                       Finance & Administration

Date: May 21, 1998                                   Date: May 27, 1998
      --------------------------                           ---------------------


<PAGE>



<TABLE>
                                    SCHEDULE 1
                                       TO
                                FOURTH AMENDMENT


<CAPTION>
                                                      Applicable
                                                       Maximum
                      As of                             Amount
                  ------------------------------------------------
                  <S>                               <C>         
                  May 11, 1998                      $605,000,000
                  June 30, 1998                     $640,000,000
                  July 31, 1998                     $670,000,000
                  August 31, 1998                   $700,000,000
                  September 30, 1998                $725,000,000
                  October 31, 1998 and thereafter   $750,000,000
</TABLE>





















<PAGE>


                                                                      Exhibit 11

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

<CAPTION>
Three Months Ended June 30,                             1998          1997
- ---------------------------                             ----          ----
<S>                                                  <C>          <C>
Basic Earnings Per Common Share:
    Net (Loss)                                       $ (89,474)   $ (55,475)
                                                     =========    =========

    Weighted average number of Common and Series A
        Common Shares Outstanding (1)                   71,730       71,499
                                                     =========    =========

Basic Earnings Per Common Share
    Net (Loss)                                       $   (1.25)   $   (0.78)
                                                     =========    =========


Diluted Earnings Per Common Share (2):
    Net (Loss)                                       $ (89,474)   $ (55,475)
                                                     =========    =========

    Weighted average number of Common and Series A
        Common Shares Outstanding (1)                   71,730       71,499
                                                     =========    =========

Diluted Earnings Per Common Share
    Net (Loss)                                       $   (1.25)   $   (0.78)
                                                     =========    =========


Six Months Ended June 30,                               1998         1997
- -------------------------                               ----         ----
Basic Earnings Per Common Share:
    Net (Loss)                                       $(176,395)   $ (77,815)
                                                     =========    =========

    Weighted average number of Common and Series A
        Common Shares Outstanding (1)                   71,683       71,442
                                                     =========    =========

Basic Earnings Per Common Share
    Net (Loss)                                       $   (2.46)   $   (1.09)
                                                     =========    =========


Diluted Earnings Per Common Share (2):
    Net (Loss)                                       $(176,395)   $ (77,815)
                                                     =========    =========

    Weighted average number of Common and Series A
    Common Shares Outstanding (1)                       71,683       71,442
                                                     =========    =========

Diluted Earnings Per Common Share
    Net (Loss)                                       $   (2.46)   $   (1.09)
                                                     =========    =========



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

(2)     The Company adopted in 1997 Statement of Financial  Accounting Standards
        ("SFAS") No. 128,  "Earnings Per Common Share".  The  implementation  of
        SFAS No.  128 had no effect on  reported  (Loss) per Common and Series A
        Common Share due to the current Net (Loss).
</FN>
</TABLE>


<PAGE>


<TABLE> <S> <C>


<ARTICLE>                     5
<LEGEND>
This schedule contains summary financial information extracted from the 
consolidated financial statements of Aerial Communications, Inc. as of June 30,
1998, and for the six months then ended, and is qualified in its entirety by
reference to such financial statements.
</LEGEND>
<MULTIPLIER>                                   1,000
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                              DEC-31-1998
<PERIOD-END>                                   JUN-30-1998
<CASH>                                            1,979
<SECURITIES>                                          0
<RECEIVABLES>                                    44,237 
<ALLOWANCES>                                     17,709
<INVENTORY>                                      12,761
<CURRENT-ASSETS>                                 46,980
<PP&E>                                          690,547
<DEPRECIATION>                                   75,102
<TOTAL-ASSETS>                                  957,398
<CURRENT-LIABILITIES>                            73,813 
<BONDS>                                         241,147
                                 0
                                           0
<COMMON>                                         71,733
<OTHER-SE>                                      (54,885)
<TOTAL-LIABILITY-AND-EQUITY>                    957,398
<SALES>                                          14,499
<TOTAL-REVENUES>                                 67,434
<CGS>                                            43,393
<TOTAL-COSTS>                                   204,209
<OTHER-EXPENSES>                                   (326)
<LOSS-PROVISION>                                      0
<INTEREST-EXPENSE>                               38,200
<INCOME-PRETAX>                                (174,649)
<INCOME-TAX>                                      1,746
<INCOME-CONTINUING>                            (176,395)
<DISCONTINUED>                                        0
<EXTRAORDINARY>                                       0
<CHANGES>                                             0
<NET-INCOME>                                   (176,395)
<EPS-PRIMARY>                                     (2.46)
<EPS-DILUTED>                                     (2.46)

        


</TABLE>


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