SECURITIES AND EXCHANGE COMMISSION
                             Washington, D. C. 20549

                                    FORM 11-K

                 ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934


(Mark One)

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

              For the fiscal year ended December 31, 2000
                                       OR

      [   ]   TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES
              EXCHANGE ACT OF 1934

              For the transition period from _____ to _____

Commission file number 1-14157

      A.   Full title of the plan and the address of the plan, if different from
           that of the issuer named below:

                        Telephone and Data Systems, Inc.
                            Tax-Deferred Savings Plan
                             30 North LaSalle Street
                                   40th Floor
                                Chicago, IL 60602

      B.   Name of issuers of the securities held pursuant to the plan and the
           addresses of the principal executive office:

                        Telephone and Data Systems, Inc.
                             30 North LaSalle Street
                                   40th Floor
                                Chicago, IL 60602

                       United States Cellular Corporation
                            8410 West Bryn Mawr Ave.
                                    Suite 700
                                Chicago, IL 60631







                              Required Information


(a)  Financial Statements

     1.  Independent Auditors Report.

     2.  Audited Statements  of Net Assets Available for Benefits as of December
         31, 2000 and December 31, 1999.

     3.  Audited Statements of Changes in Net Assets  Available for Benefits for
         the year ended December 31, 2000 and  for  the  year ended December 31,
         1999.

     4.  Notes to Financial Statements.

     5.  Schedule of Assets (Held at End of Year).

     6.  Schedule of Reportable Transactions.




(b)  Exhibits

     No.                 Description
     --                  -----------

     1.   Consent of Independent Public Accountants




                                       2




                          INDEPENDENT AUDITOR'S REPORT


To the Investment Management Committee
Telephone and Data Systems, Inc.
  Tax-Deferred Savings Plan
Middleton, Wisconsin

We have audited the accompanying statements of net assets available for benefits
of Telephone and Data Systems, Inc. Tax-Deferred Savings Plan as of December 31,
2000 and 1999, and the related statements of changes in net assets available for
benefits  for  the  years  then  ended.  These  financial   statements  are  the
responsibility  of the Plan's  management.  Our  responsibility is to express an
opinion on these  financial  statements  based on our audits.

We conducted our audits in accordance with auditing standards generally accepted
in the  United  States of  America.  Those  standards  require  that we plan and
perform the audit to obtain  reasonable  assurance  about  whether the financial
statements are free of material misstatement.  An audit includes examining, on a
test basis,  evidence  supporting  the amounts and  disclosures in the financial
statements.  An audit also includes assessing the accounting principles used and
significant  estimates  made by  management,  as well as evaluating  the overall
financial  statement  presentation.   We  believe  that  our  audits  provide  a
reasonable basis for our opinion.

In our opinion,  the financial  statements  referred to above present fairly, in
all material  respects,  the net assets available for benefits of the Plan as of
December 31, 2000 and 1999, and the changes in net assets available for benefits
for the years then ended in  conformity  with  accounting  principles  generally
accepted in the United States of America.

Our audits  were  performed  for the  purpose of forming an opinion on the basic
financial  statements  taken as a whole.  The  supplemental  schedules of assets
(held at end of year) and reportable  transactions are presented for the purpose
of  additional  analysis  and are not a  required  part of the  basic  financial
statements  but are  supplementary  information  required by the  Department  of
Labor's Rules and  Regulations  for Reporting and Disclosure  under the Employee
Retirement  Income Security Act of 1974.  These  supplemental  schedules are the
responsibility of the Plan's  management.  The supplemental  schedules have been
subjected  to the  auditing  procedures  applied  in  the  audits  of the  basic
financial  statements  and, in our  opinion,  are fairly  stated in all material
respects in relation to the basic financial statements taken as a whole.


                                               McGLADREY & PULLEN, LLP


Madison, Wisconsin
May 25, 2001



                                       3




TELEPHONE AND DATA SYSTEMS, INC.
TAX-DEFERRED SAVINGS PLAN

STATEMENTS OF NET ASSETS AVAILABLE FOR BENEFITS
December 31, 2000 and 1999




ASSETS                                                                                2000                 1999
--------------------------------------------------------------------------------------------------------------------

                                                                                                 
Investments, at fair value                                                        $ 110,357,893       $ 144,686,096
                                                                                  -------------       -------------

Receivables:
  Employers' contributions                                                            4,152,574           4,626,108
  Accrued interest and dividends                                                          7,551              10,403
  Due from broker                                                                        18,072              27,790
  Other                                                                                       -              34,718
                                                                                  -------------       -------------
      Total receivables                                                               4,178,197           4,699,019
                                                                                  -------------       -------------

      Total assets                                                                  114,536,090         149,385,115

LIABILITIES

Due to Broker for Securities Purchased                                                  434,914             544,930
                                                                                  -------------       -------------

NET ASSETS AVAILABLE  FOR BENEFITS                                                $ 114,101,176       $ 148,840,185
                                                                                  =============       =============

See Notes to Financial Statements.




                                       4



TELEPHONE AND DATA SYSTEMS, INC.
TAX-DEFERRED SAVINGS PLAN



STATEMENTS OF CHANGES IN NET ASSETS AVAILABLE FOR BENEFITS
December 31, 2000 and 1999


                                                                                       2000                1999
--------------------------------------------------------------------------------------------------------------------
                                                                                                  
ADDITIONS
Investment income:
  Net appreciation (depreciation) in fair value of:
    Registered investment companies                                               $  (6,938,897)      $   4,737,796
    Common stock                                                                    (21,375,858)         55,875,131
  Interest                                                                            1,633,353             722,406
  Dividends                                                                           1,334,227           1,448,144
                                                                                  -------------       -------------
                                                                                    (25,347,175)         62,783,477
    Less investment expenses                                                            (30,284)            (26,405)
                                                                                  -------------       -------------
                                                                                    (25,377,459)         62,757,072
                                                                                  -------------       -------------
Contributions:
  Employers'                                                                          4,192,569           4,717,571
  Participants'                                                                      14,973,755          15,450,117
  Participant rollovers                                                                 768,370           1,028,264
  Forfeitures                                                                          (499,452)            (91,463)
  Transfer of assets from merged plans                                                1,843,248                   -
                                                                                  -------------       -------------
                                                                                     21,278,490          21,104,489
                                                                                  -------------       -------------

      Total additions                                                                (4,098,969)         83,861,561
                                                                                  -------------       -------------

DEDUCTIONS
Benefits paid to participants                                                        11,878,249          10,696,744
Transfer of assets to other plan (Note 5)                                            18,761,791                   -
                                                                                  -------------       -------------

      Total deductions                                                               30,640,040          10,696,744
                                                                                  -------------       -------------

      Net increase (decrease)                                                       (34,739,009)         73,164,817

Net assets available for benefits:
  Beginning of year                                                                 148,840,185          75,675,368
                                                                                  -------------       -------------

  End of year                                                                     $ 114,101,176       $ 148,840,185
                                                                                  =============       =============

See Notes to Financial Statements.


                                       5



TELEPHONE AND DATA SYSTEMS, INC.
TAX-DEFERRED SAVINGS PLAN

NOTES TO FINANCIAL STATEMENTS
--------------------------------------------------------------------------------


Note 1.   Plan Description

The  following  description  of the  Telephone  and  Data  Systems,  Inc.  (TDS)
Tax-Deferred   Savings  Plan  (the  Plan)  provides  only  general  information.
Participants should refer to the Plan agreement for a more complete  description
of the Plan's provisions.

General:  The Plan, a contributory  tax-exempt  profit-sharing  plan,  qualifies
under Section 401 and 501 of the Internal  Revenue  Code,  and is subject to and
files reports under the provisions of the Employee  Retirement  Income  Security
Act of 1974 (ERISA).  The Plan  (together  with Social  Security,  any other tax
qualified  retirement  plan or plans  maintained  by TDS and  personal  savings)
provides  for the  livelihood  of the  employees  of TDS  and its  participating
subsidiaries upon their retirement or other separation from service.

The  Plan's  assets  are  administered  by an  investment  management  committee
appointed by TDS. The  investment  management  committee is authorized to invest
Plan assets as directed by the participants,  except in the case of the employer
match which is invested  in the common  stock of TDS or the common  stock of its
subsidiaries:   United   States   Cellular   Corporation   (USCC),   and  Aerial
Communications,  Inc. (Aerial).  All administrative,  recordkeeping and auditing
fees are borne by TDS.

Eligibility and Vesting:  All employees age 21 and older are generally  eligible
to  participate  after  completing  three  months  of service. Participation  is
completely voluntary.

Participants are immediately vested in their  contributions plus actual earnings
thereon. Vesting in TDS's matching contributions plus actual earnings thereon is
based on years of  continuous  service  and is  subject to a  three-year  graded
vesting   schedule.   Participants  vest  one-third  in  all  employer  matching
contributions for each year of service they complete.  A participant becomes 100
percent vested in employer  contributions  after three years of service, or upon
retirement, death or disability.

Participant   Accounts:   Each  participant's   account  is  credited  with  the
participant's   contributions   and   allocations   of  (a)   their   employer's
contributions  and (b) Plan  earnings.  Allocations  are  based  on  participant
earnings or account balances,  as defined. The benefit to which a participant is
entitled  is the  benefit  that can be provided  from the  participant's  vested
account.

Contributions:  Participants  may defer from 1 percent  to 15 percent  (in whole
increments)  of their  pre-tax  annual  compensation,  as  defined  in the plan.
Participants may also contribute amounts  representing  distributions from other
qualified defined benefit or contribution plans.

The  Plan  provides  for  an  annual  employer  matching  contribution  to  each
participant  employed by TDS and its  participating  subsidiaries as of December
31. The employer  matching  contribution for each USCC,  Aerial and Suttle Press
participant  is $1.00  per $1.00  for the  first 2  percent  of salary  deferral
contributions  and $.25 per  $1.00 for the next 4  percent  of  salary  deferral
contributions.  The employer matching contribution for all other participants is
$.30 per $1.00 for the first 6 percent of salary deferral contributions.


                                       6

TELEPHONE AND DATA SYSTEMS, INC.
TAX-DEFERRED SAVINGS PLAN

NOTES TO FINANCIAL STATEMENTS
--------------------------------------------------------------------------------


Note 1.   Plan Description (Continued)

Employer   contributions  of  United  States  Cellular  Corporation  and  Aerial
Communications, Inc. are made in USCC and Aerial common stock, respectively. All
other employer contributions are made in TDS common stock.

Contributions are subject to certain limitations.

Investment Options: Participants may invest their personal contributions and any
rollover  account  balances into a variety of  investment  options as more fully
described in the Plan's  literature.  Participants  may change their  investment
options via telephone at any time.

Payment of Benefits:  If a  participant  retires or  terminates  service for any
reason,   the  Plan  Administrator  will  provide  for  the  distribution  of  a
participant's account balance in one lump sum or periodic payments.

Participant Notes Receivable:  The Plan loan provision allows  participants with
account  balances to borrow from their  account  and repay  their  account  with
interest  through  payroll  deductions.  Loans  may be  taken  for any  purpose.
Participants  may borrow  from  their fund  accounts a minimum of $1,000 up to a
maximum  equal to the lesser of $50,000 or 50 percent of their  account  balance
(excluding matching  contributions).  The repayment period on the loan can range
from one to five  years.  The loan  interest  rate will be the prime rate plus 1
percent as published in the Wall Street Journal on the first business day of the
month in which the loan is  approved.  Loans are  secured by the  balance of the
participant's account. Loans will be considered in default if no loan payment is
received during any 45-day period.

Forfeited  Accounts:  During the years ended  December  31,  2000 and 1999,  all
forfeited  nonvested accounts were used to reduce the employer  contributions by
$449,452 and $91,463, respectively.


Note 2.   Summary of Accounting Policies

Use of Estimates:  The  preparation of financial  statements in conformity  with
generally accepted  accounting  principles requires management to make estimates
and  assumptions  that affect the reported  amounts of net assets  available for
benefits and changes therein. Actual results could differ from those estimates.

Investment  Valuation and Income Recognition:  The Plan's investments are stated
at fair value. Shares of registered investment companies, TDS common stock, USCC
common  stock,  Aerial common stock and  VoiceStream  common stock are valued at
quoted  market  price.  Shares held in bank common  trust funds and money market
funds are  reported at fair value  based on the unit prices  quoted by the fund,
representing  the fair value of the underlying  investments.  Participant  notes
receivable are valued at cost, which approximates fair value.

Purchases and sales of securities are recorded on a trade-date basis. Interest
income is recorded on the accrual basis. Dividends are on the ex-dividend date.

Payment of Benefits:  Benefits are recorded when paid.



                                       7


TELEPHONE AND DATA SYSTEMS, INC.
TAX-DEFERRED SAVINGS PLAN

NOTES TO FINANCIAL STATEMENTS
--------------------------------------------------------------------------------

Note 3.   Investments

The  following  presents  investments  that  represent  5 percent or more of the
Plan's net assets at December 31, 2000 and 1999:




                                                                            2000                    1999
                                                                       --------------------------------------
                                                                                         
Investments at fair value as determined by quoted market price:
    Common stock:
      Telephone and Data Systems, Inc.                                 $ 23,634,540 *          $ 30,019,248 *
      United States Cellular Corporation                                 17,191,374 *            22,533,288 *
      VoiceStream Wireless Corporation                                    5,855,570 *                     -
      Aerial Communications, Inc.                                                 - *            24,634,347 *
    Mutual funds:
      Vanguard Institutional Index Fund                                  29,410,632                       -
      BT Institutional Equity 500 Index                                           -              30,474,032
      Credit Suisse Institutional Fund International Equity
        (FKA Warburg Pincus International Fund)                           5,666,193 **            8,086,956
      Yacktman Fund Inc.                                                          -               8,483,218
    Bank Common Trust Funds:
       LaSalle National Pooled Income                                    10,631,707 *            10,863,394 *

*Includes non-participant directed funds as discussed in Note 4.
**Less than 5 percent of net assets


The  2001  market   volatility  of  equity-based   investments  is  expected  to
substantially  impact the value of such  investments  at any given  time.  It is
likely that the value of the Plan's investments, both in total and in individual
participant accounts, has declined since December 31, 2000.


                                        8

TELEPHONE AND DATA SYSTEMS, INC.
TAX-DEFERRED SAVINGS PLAN

NOTES TO FINANCIAL STATEMENTS
--------------------------------------------------------------------------------


Note 4.   Nonparticipant-Directed Investments

Information  about the net assets and the significant  components of the changes
in net assets relating to the nonparticipant-directed investments is as follows:



                                                                                          December 31,
                                                                               --------------------------------
                                                                                   2000               1999
                                                                               -----------         ------------
                                                                                             
Net assets:
  Investments:
    Common stock:
      Telephone and Data Systems, Inc.                                         $  8,160,074       $  10,359,726
      United States Cellular Corporation, Inc.                                    6,732,654           9,177,365
      VoiceStream Wireless Corporation                                               52,100                   -
      Aerial Communications, Inc.                                                         -           7,459,416
    Bank common trust funds:
      Bank of New York                                                              566,548             969,914
                                                                               ------------        ------------
        Total investments                                                        15,511,376          27,966,421
  Receivables:
    Employers' contributions                                                      4,152,574           4,626,108
    Other                                                                             2,435               3,663
                                                                               ------------        ------------
        Total assets                                                             19,666,385          32,596,192
Liabilities                                                                         123,539             148,375
                                                                               ------------        ------------
        Total nonparticipant-directed net assets                               $ 19,542,846        $ 32,447,817
                                                                               ============        ============





                                                                                    Years Ended December 31,
                                                                               ---------------------------------
                                                                                   2000                1999
                                                                               ------------        -------------
                                                                                             
Changes in nonparticipant-directed net assets:
  Net appreciation (depreciation) in fair value of investments                 $ (8,338,578)       $ 19,594,391
  Dividends and interest                                                            878,327              59,844
  Contributions                                                                   3,693,117           4,626,108
  Benefits paid to participants                                                  (2,030,340)         (1,755,199)
  Transfer of assets to other plan  (Note 5)                                     (7,107,497)                  -
                                                                               ------------        ------------
    Net increase (decrease)                                                    $(12,904,971)       $ 22,525,144
                                                                               ============        ============


Note 5.   Sales of Subsidiaries and Transfer of Participant Accounts

Effective  January  1,  2000,  TDS sold  the  stock  of its  subsidiary,  Aerial
Communications,  Inc., to VoiceStream Wireless Corporation.  Plan assets related
to the accounts of Aerial participants totaling  approximately  $18,800,000 were
transferred to a new plan on March 20, 2000.

                                       9


TELEPHONE AND DATA SYSTEMS, INC.
TAX-DEFERRED SAVINGS PLAN

NOTES TO FINANCIAL STATEMENTS
--------------------------------------------------------------------------------

Note 6.   Related-Party Transactions

Certain Plan investments are shares of a common trust fund sponsored by the Bank
of New York. Chicago Trust Company, a subsidiary of the Bank of New York, is the
trustee of the Plan and, therefore, these transactions qualify as
party-in-interest transactions.

All employer contributions for 2000 have been or will be made in common stock of
TDS and USCC. All employer contributions for 1999 have been made in common stock
of TDS, USCC and Aerial.


Note 7.   Plan Termination

Although it has not  expressed  any intent to do so, TDS has the right under the
Plan to  discontinue  its  contributions  at any time and to terminate  the Plan
subject  to  the  provisions  of  ERISA.  In  the  event  of  plan  termination,
participants will become 100 percent vested in their accounts.


Note 8.   Income Tax Status

The Internal  Revenue  Service has  determined  and informed TDS by letter dated
January 27, 1999 that the Plan and related trust are designed in accordance with
applicable  sections of the Internal  Revenue  Code.  Although the Plan has been
amended  since  receiving  the  determination  letter,  the  Plan  administrator
believes that the Plan is designed and is currently being operated in compliance
with the applicable requirements of the Internal Revenue Code.







                                       10




TELEPHONE AND DATA SYSTEMS, INC.
TAX-DEFERRED SAVINGS PLAN



SCHEDULE OF ASSETS (HELD AT END OF YEAR)
December 31, 2000

                                                                                                             Current
                                                                        Shares             Cost               Value
-----------------------------------------------------------------------------------------------------------------------

                                                                                                
Common stocks:
  Telephone and Data Systems, Inc.*                                     262,606      $  18,344,255       $  23,634,540
  United States Cellular Corporation*                                   285,334         15,253,963          17,191,374
  VoiceStream Wireless Corporation                                       58,192          1,943,985           5,855,570

Shares of registered investment companies:
  Vanguard Institutional Index Fund                                     243,627         29,410,632          29,410,632
  Loomis Sayles Bond Fund                                               405,402          4,879,709           4,483,743
  Credit Suisse Institutional Fund International Equity                 519,834          8,096,665           5,666,193
  Selected American Shares                                               73,795          2,772,383           2,607,181
  Turner Midcap Growth Fund                                             183,444          6,881,702           5,611,563
  Mercury Select Growth Fund                                             68,586          1,332,030             970,487

Bank common trust funds:
  LaSalle National Pooled Income                                     10,631,707         10,631,707          10,631,707
  Bank of New York*                                                   1,695,579          1,695,579           1,695,579

Participant notes                                              Loan term
                                                               1-5 years
                                                               Interest rates
                                                               prime + 1%                2,599,324           2,599,324
                                                                                     -------------       -------------

                                                                                     $ 103,841,934       $ 110,357,893
                                                                                     =============       =============

* A party-in-interest as defined by ERISA.



                                        11



TELEPHONE AND DATA SYSTEMS, INC.
TAX-DEFERRED SAVINGS PLAN


SCHEDULE OF REPORTABLE TRANSACTIONS
Year Ended December 31, 2000


                                                             Purchase       Selling        Cost of        Net Gain
Description of the Security                                   Price          Price          Asset         or (Loss)
--------------------------------------------------------------------------------------------------------------------

                                                                                           
Aerial Communications, Inc.
  Common stock*                                          $    538,363    $ 17,078,488    $  6,022,996    $ 11,055,492

Telephone and Data Systems, Inc.
  Common stock*                                            10,408,541       7,953,033       4,689,899       3,263,134

United States Cellular Corporation, Inc.
  Common stock*                                            12,755,540       8,843,399       6,821,673       2,021,726

Credit Suisse Institutional Fund International Equity
  (FKA Warburg Pincus International Fund)                   4,841,931       4,803,368       2,970,655       1,832,713

Deutsche Institutional Equity 500 Index Fund
  (FKA BT Institutional Equity 500 Index)                  13,287,327      40,895,097      36,668,005       4,227,092

Vanguard Institutional Index Fund                          29,410,632               -               -               -

Turner Midcap Growth Fund                                   8,512,418       1,487,392       1,630,716        (143,324)

Yacktman Fund Inc.                                          1,021,734       9,898,680      12,493,176      (2,594,496)

LaSalle National Pooled Income Fund                        12,855,525      13,087,211      13,087,211               -

Bank of New York Common
  Trust Fund*                                              38,691,148      39,751,926      39,751,926               -


* A party-in-interest as defined by ERISA.



                                       12




                                   Signatures

The Plan.  Pursuant to the requirements of the Securities  Exchange Act of 1934,
Telephone and Data Systems,  Inc., the Plan  Administrator  has duly caused this
Annual  Report  on Form  11-K to be  signed  on its  behalf  by the  undersigned
hereunto duly authorized.


                           TELEPHONE AND DATA SYSTEMS, INC.
                           TAX-DEFERRED SAVINGS PLAN



                           By /s/ C. Theodore Herbert
                           -----------------------------------------------------
                           C. Theodore Herbert, Vice President - Human Resources




Dated:  June 19, 2001