Exhibit 4.3




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

                          SECOND SUPPLEMENTAL INDENTURE

                          Dated as of February 10, 1998


                                     Between


                        TELEPHONE AND DATA SYSTEMS, INC.

                                       and

                       THE FIRST NATIONAL BANK OF CHICAGO

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





                                                     






                                    ARTICLE I

                                   DEFINITIONS

      Section 1.1.  Definition of Terms............................2
      Section 1.2.  Interpretation.................................3

                                   ARTICLE II

                         GENERAL TERMS AND CONDITIONS OF
                           THE SUBORDINATED DEBENTURES
      Section 2.1.  Designation and Principal Amount...............3
      Section 2.2.  Maturity.......................................3
      Section 2.3.  Form and Payment...............................3
      Section 2.4.  Global Subordinated Debenture..................4
      Section 2.5.  Interest.......................................5

                                   ARTICLE III

                    REDEMPTION OF THE SUBORDINATED DEBENTURES

      Section 3.1.  Tax Event Redemption...........................6
      Section 3.2.  Optional Redemption by Company.................6
      Section 3.3.  No Sinking Fund................................7

                                   ARTICLE IV

                      EXTENSION OF INTEREST PAYMENT PERIOD

      Section 4.1.  Extension of Interest Payment Period...........7
      Section 4.2.  Notice of Extension............................7

                                    ARTICLE V

                                    EXPENSES

      Section 5.1.  Payment of Expenses............................8

                                   ARTICLE VI

                                  SUBORDINATION

      Section 6.1.  Agreement to Subordinate.......................9
      Section 6.2.  Default on Senior Indebtedness.................9
      Section 6.3.  Liquidation; Dissolution;
                      Bankruptcy..................................10



                                        -i-





      Section 6.4.  Subrogation...................................11
      Section 6.5.  Trustee to Effectuate
                      Subordination...............................12
      Section 6.6.  Notice by the Company.........................12
      Section 6.7.  Rights of the Trustee; Holders of Senior
                      Indebtedness................................12
      Section 6.8.  Subordination May Not Be
                      Impaired....................................13

                                   ARTICLE VII

                          COVENANT TO LIST ON EXCHANGE

      Section 7.1.  Listing on Exchange...........................13

                                  ARTICLE VIII

                         FORM OF SUBORDINATED DEBENTURE

      Section 8.1.  Form of Subordinated Debenture................14

                                   ARTICLE IX

                    ORIGINAL ISSUE OF SUBORDINATED DEBENTURES

      Section 9.1.  Original Issue of Subordinated
                      Debentures..................................21

                                    ARTICLE X

                                  MISCELLANEOUS

      Section 10.1.  Ratification of Indenture....................21
      Section 10.2.  Trustee Not Responsible for
                       Recitals...................................21
      Section 10.3.  Governing Law................................21
      Section 10.4.  Separability.................................21
      Section 10.5.  Counterparts.................................22




                                       -ii-




                    THIS SECOND SUPPLEMENTAL INDENTURE, dated as of February 10,
1998 (the "Second Supplemental Indenture"), between  Telephone and Data Systems,
Inc., an Iowa corporation (the "Company"), and The First National Bank of 
Chicago,  a national  banking  association,  duly organized  and  existing  
under the laws of the United  States,  as trustee (the "Trustee")  under the 
Indenture dated as of October 15, 1997 between the Company and the Trustee (the 
"Indenture").

                              W I T N E S S E T H:

                         WHEREAS, the  Company  executed  and  delivered  the
Indenture  to  the  Trustee  to  provide  for  the  future  issuance  of  the
Company's unsecured subordinated debt securities, to be issued from time to time
in one or more series as might be determined by the Company under the Indenture,
in an  unlimited  aggregate  principal  amount  which may be  authenticated  and
delivered as provided in the Indenture; and

                         WHEREAS, pursuant  to  the  terms  of  the  Indenture,
the Company  desires  to  provide  for  the  establishment  of a new series of
its Debt  Securities  to be known as its 8.04%  Junior  Subordinated  Deferrable
Interest Debentures due March 31, 2038 (the "Subordinated Debentures"), the form
and substance of which and the terms,  provisions and  conditions  thereof to be
set forth as provided in the Indenture and this Second  Supplemental  Indenture;
and

                         WHEREAS,  TDS  Capital  II,  a  Delaware  statutory
business  trust  (the Trust"),   has  offered  to  the  public    $150,000,000
aggregate stated liquidation amount of its Trust Originated Preferred Securities
(the "Preferred Securities") and has offered to the Company $4,640,000 aggregate
stated liquidation amount of its Trust Originated Common Securities (the "Common
Securities"),  such  Preferred  Securities  and Common  Securities  representing
undivided  beneficial  interests  in the assets of the Trust,  and  proposes  to
invest the  proceeds  from such  offering in  $154,640,000  aggregate  principal
amount of the Subordinated Debentures; and

                         WHEREAS,   the   Company    has   requested    the
Trustee to execute  and  deliver  this Second  Supplemental  Indenture,  and all
requirements  necessary  to make  this  Second  Supplemental  Indenture  a valid
instrument,  in  accordance  with  its  terms,  and  to  make  the  Subordinated
Debentures,  when executed by the Company and authenticated and delivered by the
Trustee,  the valid  obligations of the Company,  have been  performed,  and the
execution  and  delivery of this  Second  Supplemental  Indenture  has been duly
authorized in all respects;

                         NOW,  THEREFORE,  in    consideration   of   the
purchase and acceptance of the  Subordinated  Debentures by the holder  thereof,
and for the purpose of setting forth, as provided in the Indenture, the form and
substance  of  the  Subordinated   Debentures  and  the  terms,  provisions  and
conditions  thereof,  the  Company  covenants  and  agrees  with the  Trustee as
follows:





                                        





                                    ARTICLE I

                                   DEFINITIONS

                         Section 1.1.   Definition  of  Terms.    Unless  the
context  otherwise  requires,  (a) a term defined in the  Indenture has the same
meaning  when used in this Second  Supplemental  Indenture;  (b) a term  defined
anywhere in this Second Supplemental  Indenture has the same meaning throughout;
and (c) the following terms have the meanings given to them in the  Declaration:
(i) Clearing Agency; (ii) Delaware Trustee;  (iii) Redemption Tax Opinion;  (iv)
Preferred  Security  Certificate;  (v) Property  Trustee;  (vi) Pro Rata;  (vii)
Regular Trustees; and (viii) Tax Event.

                         In addition, the following terms have the following 
respective meanings:

Declaration:

                         The   term   "Declaration"   shall  mean   the
Amended and Restated Declaration of Trust of TDS Capital II, a Delaware business
trust, dated as of February 10, 1997.

Maturity Date:

                         The   term  "Maturity Date"  shall  mean  the  date
on which the Subordinated  Debentures mature and on which the principal shall be
due and payable together with all accrued and unpaid interest thereon  including
Compounded  Interest  (as defined in Section  4.1) and  Additional  Interest (as
defined in Section 2.5(c)), if any.

Senior Indebtedness:

                         The   term   "Senior  Indebtedness"   shall   mean  (i)
any payment in respect of (A) indebtedness of the Company for money borrowed and
(B)  indebtedness  evidenced by securities,  debentures,  bonds,  notes or other
similar instruments issued by the Company; (ii) all capital lease obligations of
the  Company;  (iii) all  obligations  of the  Company  issued or assumed as the
deferred  purchase price of property,  all conditional  sale  obligations of the
Company and all of its  obligations  under any title  retention  agreement  (but
excluding  trade accounts  payable  arising in the ordinary course of business);
(iv) all obligations of the Company for  reimbursement  on any letter of credit,
banker's  acceptance,  security purchase facility or similar credit transaction;
(v) all obligations of the type referred to in clauses (i) through (iv) of other
Persons  for the  payment  of which  the  Company  is  responsible  or liable as
obligor,  guarantor or otherwise;  and (vi) all obligations of the type referred
to in  clauses  (i)  through  (v) of other  Persons  secured  by any lien on any
property or asset of the Company  (whether or not such  obligation is assumed by
the  Company),  except  for  (1)  the  Subordinated  Debentures  and  any  other
indebtedness  that is by its  terms  subordinated  to or  pari  passu  with  the
Subordinated Debentures, as the case may be, including all other debt securities
and guarantees in respect of those debt securities,  issued to any other trusts,
partnerships  or any  other  entity  affiliated  with  the  Company  which  is a
financing  vehicle of the Company  ("Financing  Entity") in  connection  with an
issuance of preferred  securities by such Financing  Entity or other  securities
which rank pari passu with, or junior to, the Preferred Securities,  and (2) any
indebtedness between or among the Company and its Affiliates.


                                        -2-






                         Section 1.2.   Interpretation.   Each  definition  in
this Second  Supplemental  Indenture  includes the singular and the plural,  and
references  to the neuter  gender  include  the  masculine  and  feminine  where
appropriate.  Terms which relate to accounting  matters shall be  interpreted in
accordance with generally accepted accounting  principles in effect from time to
time.  References  to any statute  mean such  statute as amended at the time and
include any successor legislation. The word "or" is not exclusive, and the words
"herein," "hereof" and "hereunder" refer to this Second  Supplemental  Indenture
as a whole.  The headings to the Articles  and Sections are for  convenience  of
reference  and shall not affect the  meaning or  interpretation  of this  Second
Supplemental  Indenture.  References  to Articles and Sections mean the Articles
and Sections of this Second Supplemental Indenture unless otherwise specified.



                                   ARTICLE II

                         GENERAL TERMS AND CONDITIONS OF
                           THE SUBORDINATED DEBENTURES


                         Section 2.1.  Designation   and   Principal  Amount.
There  is  hereby   authorized  a  series  of  Debt  Securities  designated the
"8.04% Junior  Subordinated  Deferrable Interest Debentures due March 31, 2038,"
limited in aggregate principal amount to $154,640,000,  which amount shall be as
set  forth  in any  written  order of the  Company  for the  authentication  and
delivery of such Debt Securities pursuant to Section 2.04 of the Indenture.

                         Section 2.2.  Maturity.   The   Maturity   Date   will
be the Stated  Maturity  Date provided that the Company may at its option at any
time prior to the Stated  Maturity  Date extend the Maturity  Date to a date not
later than March 31, 2047; provided,  however, that at the time such election is
made and at the effective  time of such  extension (as specified by the Company)
(i) the Company is not in  bankruptcy,  otherwise  insolvent or in  liquidation,
(ii) the Company is not in default in the payment of any  interest or  principal
on the Subordinated Debentures, and (iii) in the case of Subordinated Debentures
held by the Trust, the Trust is not in arrears on payments of Distributions  and
no deferred  Distributions  are accumulated.  In the event the Company elects to
extend the stated maturity of the Subordinated Debentures,  it shall give notice
of any such change to the  Trustee,  and the  Trustee  shall give notice of such
extension to the Holders of the  Subordinated  Debentures,  not more than 90 and
not less than 30 days prior to the effective time of such extension.

                         Section 2.3.  Form  and  Payment.   Except  as
provided in Section 2.4, the  Subordinated  Debentures  shall be issued in fully
registered certificated form without interest coupons. Principal and interest on
the Subordinated  Debentures  issued in certificated  form will be payable,  the
transfer  of  such   Subordinated   Debentures  will  be  registrable  and  such
Subordinated Debentures will be exchangeable for Subordinated Debentures bearing
identical  terms and  provisions  at the  office or  agency  of the  Trustee  in
Chicago,  Illinois,  provided,  however, that payment of interest may be made at
the  option of the  Company  by check  mailed to the  registered  holder at such
address as shall  appear in the  Security  Register or by wire  transfer to such
account as may have been appropriately


                                        -3-





designated  by  such  holder.  Notwithstanding  the  foregoing,  so  long as the
registered holder of any Subordinated  Debentures is the Property  Trustee,  the
payment of the  principal of and interest  (including  Compounded  Interest and
Additional  Interest,  if  any)  on  such  Subordinated  Debentures  held by the
Property  Trustee  will  be made at such  place  and to such  account  as may be
designated  by  the  Property  Trustee.  The  Subordinated  Debentures  will  be
denominated  in U.S.  dollars and  payments  of  principal  and  interest on the
Subordinated Debentures shall be made in U.S. dollars.

                         Section 2.4.   Global  Subordinated  Debenture.  In 
connection with the dissolution of the Trust:

                         (a)  the  Subordinated Debentures in  certificated
     form  may be  presented  to the Trustee by the Property Trustee in exchange
     for a Global   Security   in   an aggregate  principal amount equal   to  
     the   aggregate principal   amount  of  the Subordinated  Debentures so
     presented, to be registered in   the    name   of   the Depositary, or its 
     nominee, and    delivered   by   the Trustee  to the  Depositary for    
     crediting   to   the accounts       of       its participants   pursuant  
     to the   instructions  of  the Regular    Trustees.    The Company,   upon 
     any  such presentation, shall execute a Global  Security  in such aggregate
     principal amount and deliver the same to the Trustee for authentication and
     delivery in accordance  with the Indenture and this Second Supplemental
     Indenture.  Payments on the Subordinated Debentures issued as a Global 
     Security will   be   made   to   the Depositary; and

                         (b) if  any  Preferred Securities  are held in non 
     book-entry     certificated form,   the    Subordinated Debentures in  
     certificated form  may be  presented  to the Trustee by the Property 
     Trustee  and any  Preferred Security  Certificate which represents 
     Preferred Securities    other    than Preferred  Securities  held by the  
     Clearing  Agency or its nominee ("Non Book-Entry Preferred Securities") 
     will be deemed to   represent   beneficial interests  in  Subordinated 
     Debentures presented to the Trustee  by  the   Property Trustee having an 
     aggregate principal  amount  equal to the    aggregate     stated 
     liquidation  amount  of the Non  Book-Entry   Preferred Securities until   
     such Preferred Security Certificates  are presented to the  Security  
     Registrar for transfer or  reissuance at which time such Preferred
     Security Certificates will be cancelled and a Subordinated     Debenture,
     registered  in the  name of the holder of the Preferred Security 
     Certificate or the transferee of the holder of such   Preferred   Security
     Certificate,


                                        -4-





     as the case may be, with an aggregate  principal amount equal   to  the   
     aggregate stated  liquidation  amount of the  Preferred  Security
     Certificate cancelled, will be  executed by the Company and    delivered  
     to the Trustee for  authentication and delivery in  accordance with the 
     Indenture and this Second Supplemental Indenture. On issue of such
     Subordinated Debentures, Subordinated Debentures with an equivalent
     aggregate  principal amount that were  presented by the Property   Trustee 
     to  the Trustee  will be  deemed to have been cancelled.

                         Section 2.5.  Interest.

                         (a)  Each   Subordinated   Debenture   will   bear
interest at the rate of 8.04% per annum (the  "Coupon  Rate") from the  original
date of issuance until the principal thereof becomes due and payable, and on any
overdue  principal  and  (to  the  extent  that  payment  of  such  interest  is
enforceable under applicable law) on any overdue  installment of interest at the
Coupon Rate, compounded quarterly, payable (subject to the provisions of Article
IV)  quarterly in arrears on March 31, June 30,  September 30 and December 31 of
each year (each, an "Interest  Payment Date"),  commencing on March 31, 1998, to
the  Person  in  whose  name  such  Subordinated  Debenture  or any  predecessor
Subordinated  Debenture is  registered,  at the close of business on the regular
record date for such interest  installment, which shall be the close of business
on the Business Day next  preceding  that Interest  Payment Date. If pursuant to
the provisions of Section 2.11(c) of the Indenture the  Subordinated  Debentures
are no longer represented by a Global Security, the Company may select a regular
record  date  for such  interest  installment  which  shall be any date at least
fifteen days before an Interest Payment Date.

                         (b)  The   amount   of  interest  payable  for  any
period will be computed on the basis of a 360-day year of twelve 30-day  months.
In the event that any date on which  interest  is  payable  on the  Subordinated
Debentures is not a Business Day, then payment of interest  payable on such date
will be made on the next succeeding day which is a Business Day (and without any
interest or other  payment in respect of any such delay),  except that,  if such
Business Day is in the next succeeding calendar year, such payment shall be made
on the immediately  preceding Business Day, in each case with the same force and
effect as if made on such date.  The amount of  interest  payable for any period
shorter than a full  quarterly  period for which  interest is computed,  will be
computed  on the basis of the  actual  number of days  elapsed  in such a 90-day
quarter.

                         (c)  If  at  any  time  while  the Property Trustee is
the holder of any Subordinated Debentures,  the Trust or the Property Trustee is
required  to pay any  taxes,  duties,  assessments  or  governmental  charges of
whatever nature (other than withholding  taxes) imposed by the United States, or
any  other  taxing  authority,  then,  in any  case,  the  Company  will  pay as
additional interest ("Additional  Interest") on the Subordinated Debentures held
by the Property  Trustee,  such additional  amounts as shall be required so that
the net amounts  received  and  retained by the Trust and the  Property  Trustee
after paying such taxes, duties,  assessments or other governmental charges will
be equal to the amounts the Trust and the Property  Trustee  would have received
had no such taxes, duties, assessments or other government charges been imposed.


                                        -5-






                                   ARTICLE III

                    REDEMPTION OF THE SUBORDINATED DEBENTURES

                         Section 3.1.   Tax  Event  Redemption.  If  a   Tax
Event has occurred and is  continuing  and the Company has received a Redemption
Tax Opinion, then, notwithstanding Section 3.2(a) but subject to Section 3.2(b),
the  Company  shall  have the right upon not less than 30 days' nor more than 60
days' notice to the registered holders of the Subordinated  Debentures to redeem
the Subordinated  Debentures,  in whole but not in part, for cash within 90 days
following the occurrence of such Tax Event (the "90 Day Period") at a redemption
price equal to 100% of the principal  amount to be redeemed plus any accrued and
unpaid interest thereon to the date of such redemption (the "Redemption  Price")
provided that, if at the time there is available to the Company the  opportunity
to eliminate, within the 90 Day Period, the Tax Event by taking some ministerial
action ("Ministerial  Action"),  such as filing a form or making an election, or
pursuing some other similar reasonable measure that has no adverse effect on the
Company,  the Trust or the Holders of the Trust Securities  issued by the Trust,
the Company  shall pursue such  Ministerial  Action in lieu of  redemption;  and
provided  further,   that  the  Company  shall  have  no  right  to  redeem  the
Subordinated  Debentures  while the Trust is  pursuing  any  Ministerial  Action
pursuant to its obligations under the Declaration. The Redemption Price shall be
paid prior to 12:00 noon,  New York time,  on the date of such  redemption or at
such  earlier  time as the Company  determines  and  specifies  in the notice of
redemption,  provided  the  Company  shall  deposit  with the  Trustee an amount
sufficient  to pay the Special  Redemption  Price by 11:00 a.m. on the date such
Redemption Price is to be paid.

                         Section 3.2.  Optional Redemption by Company.

                         (a)   Subject   to   the    provisions   of   Article
III  of    the   Indenture   and   to    Section   3.2(b),    the   Company
shall have the right to redeem the Subordinated Debentures, in whole or in part,
from time to time,  on or after March 31, 2003,  at the  Redemption  Price.  Any
redemption  pursuant to this  paragraph will be made upon not less than 30 days'
nor more than 60 days'  notice  to the  registered  holder  of the  Subordinated
Debentures,  at the Redemption  Price. If the  Subordinated  Debentures are only
partially  redeemed  pursuant to this Section 3.2, the  Subordinated  Debentures
will be  redeemed  pro rata or by lot or by any  other  method  utilized  by the
Trustee;  provided,  that  if  at  the  time  of  redemption,  the  Subordinated
Debentures are registered as a Global  Security,  the Depositary shall determine
by lot the principal amount of such Subordinated  Debentures held by each holder
to be redeemed. The Redemption Price shall be paid prior to 12:00 noon, New York
time,  on the date of such  redemption  or at such  earlier  time as the Company
determines and specifies in the notice of redemption, provided the Company shall
deposit with the Trustee an amount  sufficient  to pay the  Redemption  Price by
11:00 a.m. on the date such Redemption Price is to be paid.

                         (b)  If a partial redemption of the Subordinated
Debentures would result in the delisting of the Preferred  Securities  issued by
the Trust from any national  securities  exchange or other organization on which
the Preferred Securities are then


                                        -6-





listed, the Company shall not be permitted to effect such partial redemption and
may only redeem the Subordinated Debentures in whole.

                              Section 3.3.    No Sinking Fund.   The
Subordinated Debentures are not entitled to the benefit of any sinking fund.


                                   ARTICLE IV

                      EXTENSION OF INTEREST PAYMENT PERIOD

                         Section 4.1.   Extension  of  Interest  Payment
Period.  The  Company  shall have the  right,  at any time and from time to time
during the term of the Subordinated  Debentures,  to extend the interest payment
period  of  such  Subordinated  Debentures  for up to  twenty  (20)  consecutive
quarters (the "Extended  Interest Payment Period");  provided,  that, during any
such Extended  Interest  Payment Period,  (a) the Company may not declare or pay
any dividend on, make any distributions with respect to, or redeem,  purchase or
acquire, or make a liquidation payment with respect to, any of its capital stock
(other than (i) purchases or  acquisitions  of shares of Company common stock in
connection with the  satisfaction  by the Company of its  obligations  under any
employee benefit plans or any other contractual obligation of the Company (other
than  a  contractual  obligation  ranking  pari  passu  with  or  junior  to the
Subordinated  Debentures),  (ii) as a result of a  reclassification  of  Company
capital  stock or the exchange or  conversion  of one class or series of Company
capital stock for another class or series of Company  capital stock or (iii) the
purchase of fractional  interests in shares of Company capital stock pursuant to
the  conversion  or exchange  provisions  of such Company  capital  stock or the
security being converted or exchanged), (b) the Company may not make any payment
of interest, principal or premium, if any, on or repay, repurchase or redeem any
debt  securities  (including  guarantees)  issued by the Company which rank pari
passu with or junior to the Subordinated  Debentures and (c) the Company may not
make any guarantee  payments with respect to the foregoing  (other than pursuant
to the Preferred  Securities  Guarantee).  To the extent permitted by applicable
law,  interest,  the payment of which has been deferred because of the extension
of the interest  payment period pursuant to this Section 4.1, will bear interest
compounded  quarterly  at the  Coupon  Rate for  each  quarter  of the  Extended
Interest  Payment  Period  ("Compounded  Interest").  At the end of the Extended
Interest  Payment Period,  the Company shall pay all interest accrued and unpaid
on the Subordinated Debentures, including any Compounded Interest and Additional
Interest  ("Deferred  Interest")  which  shall be payable to the  holders of the
Subordinated   Debentures  in  whose  names  the  Subordinated   Debentures  are
registered  in the  Security  Register on the first record date after the end of
the Extended  Interest Payment Period.  Prior to the termination of any Extended
Interest  Payment Period,  the Company may further extend such period,  provided
that such period  together  with all such further  extensions  thereof shall not
exceed  twenty (20)  consecutive  quarters or extend  beyond the maturity of the
Subordinated  Debentures.  Upon the termination of any Extended Interest Payment
Period and upon the payment of all Deferred  Interest  then due, the Company may
select  a new  Extended  Interest  Payment  Period,  subject  to  the  foregoing
requirements.  No interest shall be due and payable during an Extended  Interest
Payment Period, except at the end thereof.

                         Section 4.2.  Notice of Extension.

                         (a)  If the Property Trustee is the only registered


                                        -7-





holder  of the  Subordinated  Debentures  at the time  the  Company  selects  an
Extended Interest Payment Period,  the Company shall give written notice to both
the Regular  Trustees and the Property Trustee of its selection of such Extended
Interest  Payment  Period one  Business  Day before the  earlier of (i) the next
succeeding date on which  Distributions  on the Trust  Securities  issued by the
Trust are payable,  or (ii) the date the Trust is required to give notice of the
record or payment date for such  Distributions to the New York Stock Exchange or
other  applicable  self-regulatory  organization  or to holders of the Preferred
Securities  issued by the  Trust,  but in any event at least  one  Business  Day
before such record date.

                         (b)  If the Property Trustee is not the only holder
of the  Subordinated  Debentures  at the time the  Company  selects an  Extended
Interest Payment Period,  the Company shall give the holders of the Subordinated
Debentures  and the Trustee  written  notice of its  selection of such  Extended
Interest  Payment  Period ten (10)  Business  Days before the earlier of (i) the
next succeeding  Interest Payment Date, or (ii) the date the Company is required
to give notice of the record or payment date of such interest payment to the New
York Stock  Exchange  or other  applicable  self-regulatory  organization  or to
holders of the Subordinated  Debentures,  but in any event at least two Business
Days before such record date.

                         (c)  The quarter in which any notice is given
pursuant to paragraphs (a) or (b) of this Section 4.2 shall be counted as one of
the twenty quarters  permitted in the maximum  Extended  Interest Payment Period
permitted under Section 4.1.


                                    ARTICLE V

                                    EXPENSES

                         Section 5.1.  Payment  of   Expenses.  In
connection with the offering,  sale and issuance of the Subordinated  Debentures
to the Property  Trustee in connection with the sale of the Trust  Securities by
the Trust, the Company shall:

                         (a) pay all  costs and expenses  relating  to  the
     offering, sale and issuance of the Subordinated Debentures, including
     commissions  to  the  underwriters payable pursuant to the Underwriting  
     Agreement and   compensation  of  the Trustee under the Indenture in   
     accordance   with  the provisions  of Section 7.06 of the Indenture;

                         (b) pay all  costs and expenses   of   the   Trust
     (including, but not limited to,   costs  and   expenses relating to the
     organization  of the Trust, the   offering, sale  and issuance   of   the  
     Trust Securities (including commissions to the underwriters  in connection
     therewith),  the  fees  and expenses  of  the  Property Trustee  and  the  
     Delaware Trustee,   the   costs  and expenses  relating  to  the
     operation   of  the  Trust, including without limitation, costs    and
     expenses  of   accountants, attorneys, statistical or


                                        -8-





     bookkeeping services, expenses  for  printing and engraving  and computing 
     or accounting equipment, paying agent(s), registrar(s), transfer
     agent(s), duplicating, travel  and  telephone and other  telecommunications
     expenses  and  costs and expenses incurred in connection     with     the
     acquisition, financing, and disposition of Trust assets); and

                         (c)  pay  any  and all taxes  (other  than  United 
     States  withholding  taxes) and all liabilities,  costs and  expenses  with
     respect to such taxes of the Trust.


                                   ARTICLE VI

                                  SUBORDINATION

                         Section 6.1.  Agreement to Subordinate.  The
Company covenants and agrees, and each holder of Subordinated  Debentures issued
hereunder by such holder's  acceptance  thereof  likewise  covenants and agrees,
that all  Subordinated  Debentures  shall be issued subject to the provisions of
this  Article  VI; and each holder of a  Subordinated  Debenture,  whether  upon
original issue or upon transfer or assignment thereof,  accepts and agrees to be
bound by such provisions.

                         The  payment  by  the  Company  of  the   principal
of,  premium,  if  any,  and  interest  on all  Subordinated  Debentures  issued
hereunder  shall,  to the  extent and in the manner  hereinafter  set forth,  be
subordinated and subject in right of payment to the prior payment in full of all
Senior  Indebtedness  of the Company,  whether  outstanding  at the date of this
Second Supplemental Indenture or thereafter incurred.

                         No provision of this Article VI shall prevent the
occurrence of any default or Event of Default hereunder.

                         Section 6.2.  Default on Senior  Indebtedness.
In  the  event  and  during  the   continuation   of   any   default  by  the
Company in the payment of principal,  premium, interest or any other payment due
on any Senior  Indebtedness of the Company, or in the event that the maturity of
any  Senior  Indebtedness  of the  Company  has been  accelerated  because  of a
default,  then,  in either  case,  no payment  shall be made by the Company with
respect to the principal (including redemption payments) of, or premium, if any,
or interest on the Subordinated Debentures.

                         In  the  event  that,  notwithstanding  the  foregoing,
any  payment  shall be  received  by the  Trustee or any holder of  Subordinated
Debentures  when such payment is prohibited  by the preceding  paragraph of this
Section 6.2,  such payment  shall be held in trust for the benefit of, and shall
be paid over or  delivered  to,  the  holders  of Senior  Indebtedness  or their
respective  representatives,  or to the trustee or trustees  under any indenture
pursuant to which any of such Senior Indebtedness may have been issued, as their
respective  interests may appear, but only to the extent that the holders of the
Senior  Indebtedness (or their  representative or  representatives or a trustee)
notify the Trustee within 90


                                        -9-





days  of  such  payment  of the  amounts  then  due  and  owing  on  the  Senior
Indebtedness and only the amounts  specified in such notice to the Trustee shall
be paid to the holders of Senior Indebtedness.

                         Section 6.3.  Liquidation; Dissolution; Bankruptcy.
Upon  any   payment  by the  Company,  or  distribution  of  assets  of  the
Company of any kind or character,  whether in cash,  property or securities,  to
creditors upon any dissolution or winding-up or liquidation or reorganization of
the Company,  whether  voluntary or involuntary  or in  bankruptcy,  insolvency,
receivership or other proceedings,  all amounts due upon all Senior Indebtedness
shall  first  be paid in  full,  or  payment  thereof  provided  for in money in
accordance with its terms,  before any payment is made by the Company on account
of the  principal  (and  premium,  if  any)  or  interest  on  the  Subordinated
Debentures;  and upon any such  dissolution  or  winding-up  or  liquidation  or
reorganization,  any payment by the Company,  or  distribution  of assets of the
Company of any kind or character,  whether in cash,  property or securities,  to
which  the  holders  of the  Subordinated  Debentures  or the  Trustee  would be
entitled to receive from the Company,  except for the provisions of this Article
VI,  shall be paid by the  Company or by any  receiver,  trustee in  bankruptcy,
liquidating trustee,  agent or other Person making such payment or distribution,
or by the holders of the  Subordinated  Debentures  or by the Trustee under this
Indenture  if  received  by  them  or it,  directly  to the  holders  of  Senior
Indebtedness  of the  Company  (pro  rata to such  holders  on the  basis of the
respective amounts of Senior Indebtedness held by such holders, as calculated by
the Company) or their  representative or  representatives,  or to the trustee or
trustees under any indenture  pursuant to which any instruments  evidencing such
Senior  Indebtedness  may have been issued,  as their  respective  interests may
appear,  to the extent  necessary to pay such Senior  Indebtedness  in full,  in
money or  money's  worth,  after  giving  effect to any  concurrent  payment  or
distribution  to or for the  holders  of such  Senior  Indebtedness,  before any
payment or distribution is made to the holders of Subordinated  Debentures or to
the Trustee.

                         In the event that, notwithstanding the foregoing,
any payment or  distribution  of assets of the Company of any kind or character,
whether in cash, property or securities,  prohibited by the foregoing,  shall be
received by the Trustee or the holders of the Subordinated Debentures before all
Senior  Indebtedness  of the Company is paid in full,  or  provision is made for
such payment in money in accordance with its terms, such payment or distribution
shall be held in trust for the benefit of and shall be paid over or delivered to
the   holders  of  such  Senior   Indebtedness   or  their   representative   or
representatives,  or to the trustee or trustees under any indenture  pursuant to
which any instruments  evidencing such Senior Indebtedness may have been issued,
as their  respective  interests may appear,  as  calculated by the Company,  for
application to the payment of all Senior  Indebtedness of the Company  remaining
unpaid to the extent necessary to pay such Senior  Indebtedness in full in money
in accordance with its terms,  after giving effect to any concurrent  payment or
distribution to or for the benefit of the holders of such Senior Indebtedness.

                         For purposes of this Article VI, the words "cash,
property or  securities"  shall not be deemed to include  shares of stock of the
Company as reorganized or readjusted,  or securities of the Company or any other
corporation  provided  for by a plan  of  reorganization  or  readjustment,  the
payment of which is subordinated at least to the extent provided in this Article
VI with  respect to the  Subordinated  Debentures  to the  payment of all Senior
Indebtedness of the Company that may at the time be  outstanding,  provided that
(i)  such  Senior  Indebtedness  is  assumed  by the  new  corporation,  if any,
resulting from any such  reorganization or readjustment,  and (ii) the rights of
the holders of such Senior Indebtedness


                                       -10-





are not, without the consent of such holders,  altered by such reorganization or
readjustment.  The  consolidation  of the  Company  with,  or the  merger of the
Company into,  another  corporation  or the  liquidation  or  dissolution of the
Company following the conveyance or transfer of its property as an entirety,  or
substantially  as an  entirety,  to  another  corporation  upon  the  terms  and
conditions  provided  for in  Article X of the  Indenture  shall not be deemed a
dissolution,  winding-up, liquidation or reorganization for the purposes of this
Section 6.3 if such other  corporation  shall, as a part of such  consolidation,
merger,  conveyance or transfer,  comply with the conditions stated in Article X
of the  Indenture.  Nothing in Section 6.2 or in this Section 6.3 shall apply to
claims of, or payments to, the Trustee  under or pursuant to Section 7.06 of the
Indenture.

                         Section 6.4.   Subrogation.  Subject  to  the
payment in full of all Senior  Indebtedness  of the  Company,  the rights of the
holders of the Subordinated  Debentures shall be subrogated to the rights of the
holders of such Senior  Indebtedness  to receive  payments or  distributions  of
cash,   property  or  securities  of  the  Company  applicable  to  such  Senior
Indebtedness until the all amounts owing on the Subordinated Debentures shall be
paid in  full;  and,  for the  purposes  of such  subrogation,  no  payments  or
distributions to the holders of such Senior  Indebtedness of any cash,  property
or securities to which the holders of the Subordinated Debentures or the Trustee
would be entitled  except for the  provisions of this Article VI, and no payment
over pursuant to the provisions of this Article VI, to or for the benefit of the
holders of such Senior Indebtedness by holders of the Subordinated Debentures or
the Trustee,  shall, as between the Company, its creditors other than holders of
Senior  Indebtedness  of the  Company,  and  the  holders  of  the  Subordinated
Debentures  be deemed to be a payment  by the  Company  to or on account of such
Senior Indebtedness. It is understood that the provisions of this Article VI are
and are intended  solely for the purposes of defining the relative rights of the
holders of the Subordinated Debentures, on the one hand, and the holders of such
Senior Indebtedness on the other hand.

                         Nothing  contained  in  this  Article  VI  or elsewhere
in this  Indenture  or in the  Subordinated  Debentures  is intended to or shall
impair,  as between the Company,  its creditors other than the holders of Senior
Indebtedness of the Company, and the holders of the Subordinated Debentures, the
obligation  of the Company  which is absolute and  unconditional,  to pay to the
holders of the  Subordinated  Debentures the principal of (and premium,  if any)
and interest on the  Subordinated  Debentures  as and when the same shall become
due and  payable in  accordance  with their  terms,  or is  intended to or shall
affect the relative  rights of the holders of the  Subordinated  Debentures  and
creditors of the Company,  other than the holders of Senior  Indebtedness of the
Company,  nor shall anything herein or therein prevent the Trustee or the holder
of any Subordinated  Debenture from exercising all remedies otherwise  permitted
by applicable  law upon default under the Indenture,  subject to the rights,  if
any, under this Article VI of the holders of such Senior Indebtedness in respect
of cash,  property or securities  of the Company,  received upon the exercise of
any such remedy.

                         Upon  any  payment  or  distribution  of  assets  of
the  Company  referred  to in this  Article  VI,  the  Trustee,  subject  to the
provisions of Section 7.01 of the Indenture, and the holders of the Subordinated
Debentures, shall be entitled to rely upon any order or decree made by any court
of competent jurisdiction in which such dissolution,  winding-up, liquidation or
reorganization  proceedings  are  pending,  or a  certificate  of the  receiver,
trustee in bankruptcy,  liquidation  trustee,  agent or other Person making such
payment or  distribution,  delivered  to the  Trustee  or to the  holders of the
Subordinated  Debentures,  for the purposes of ascertaining the Persons entitled
to participate in such distribution, the holders of


                                       -11-





Senior Indebtedness and other indebtedness of the Company, the amount thereof or
payable thereon, the amount or amounts paid or distributed thereon and all other
facts pertinent thereto or to this Article VI.

                         Section 6.5.  Trustee  to  Effectuate   Subordination.
Each   holder  of  a  Subordinated  Debenture  by  such  holder's  acceptance
thereof  authorizes  and  directs  the  Trustee  on  such  holder's  behalf  to
take  such  action  as  may  be  necessary  or  appropriate  to  effectuate  the
subordination provided in this Article VI and appoints the Trustee such holder's
attorney-in-fact for any and all such purposes.

                         Section 6.6.  Notice by the Company.  The   Company
shall  give  prompt  written  notice  to  a  Responsible Officer of the Trustee
of any fact known to the Company  that would  prohibit the making of any payment
of  monies  to or by the  Trustee  in  respect  of the  Subordinated  Debentures
pursuant to the provisions of this Article VI. Notwithstanding the provisions of
this  Article  VI or any  other  provision  of the  Indenture  and  this  Second
Supplemental  Indenture,  the Trustee shall not be charged with knowledge of the
existence of  any facts that would  prohibit the making of any payment of monies
to or by the Trustee in respect of the Subordinated  Debentures  pursuant to the
provisions  of this  Article  VI unless and until a  Responsible  Officer of the
Trustee shall have received  written notice  thereof at the Principal  Office of
the Trustee  from the Company or a holder or holders of Senior  Indebtedness  or
from any trustee  therefor;  and before the receipt of any such written  notice,
the Trustee,  subject to the provisions of Section 7.01 of the Indenture,  shall
be  entitled  in all  respects  to assume  that no such facts  exist;  provided,
however,  that if the Trustee shall not have received the notice provided for in
this Section 6.6 at least two Business  Days prior to the date upon which by the
terms hereof any money may become  payable for any purpose  (including,  without
limitation,  the payment of the principal of (or premium, if any) or interest on
any  Subordinated  Debenture),  then,  anything herein contained to the contrary
notwithstanding, the Trustee shall have full power and authority to receive such
money and to apply the same to the  purposes for which they were  received,  and
shall not be affected by any notice to the contrary  that may be  received by it
within two Business Days prior to such date.

                         The  Trustee,  subject   to   the  provisions  of
Section 7.01 of the  Indenture,  shall be entitled to rely on the delivery to it
of a written  notice by a Person  representing  himself to be a holder of Senior
Indebtedness of the Company (or a trustee on behalf of such holder) to establish
that such  notice has been given by a holder of such  Senior  indebtedness  or a
trustee on behalf of any such holder or  holders.  In the event that the Trustee
determines  in good faith that further  evidence is required with respect to the
right of any Person as a holder of such Senior  Indebtedness  to  participate in
any payment or distribution pursuant to this Article VI, the Trustee may request
such Person to furnish evidence to the reasonable satisfaction of the Trustee as
to the amount of such Senior  Indebtedness  held by such  Person,  the extent to
which such Person is entitled to participate in such payment or distribution and
any other facts  pertinent  to the rights of such Person  under this Article VI,
and if such evidence is not furnished, the Trustee may defer any payment to such
Person pending judicial  determination as to the right of such Person to receive
such payment.

                         Section 6.7.  Rights  of  the  Trustee;  Holders
of Senior Indebtedness. The Trustee in its individual capacity shall be entitled
to all the  rights  set  forth  in this  Article  VI in  respect  of any  Senior
Indebtedness  at any time held by it, to the same extent as any other  holder of
Senior Indebtedness,  and nothing in this Indenture shall deprive the Trustee of
any of its rights as such holder.


                                       -12-





                         With  respect  to  the  holders  of Senior Indebtedness
of  the  Company,  the  Trustee  undertakes to perform or to observe only such
of its covenants and obligations as are  specifically  set forth in this Article
VI, and no implied  covenants or obligations with respect to the holders of such
Senior  Indebtedness shall be read into this Indenture against the Trustee.  The
Trustee  shall not be deemed to owe any  fiduciary  duty to the  holders of such
Senior  Indebtedness  and,  subject to the  provisions  of  Section  7.01 of the
Indenture,  the  Trustee  shall  not be  liable  to any  holder  of such  Senior
Indebtedness  if it  shall  pay  over or  deliver  to  holders  of  Subordinated
Debentures,  the Company or any other Person money or assets to which any holder
of such Senior  Indebtedness  shall be entitled by virtue of this  Article VI or
otherwise.

                         Section 6.8.   Subordination  May  Not  Be  Impaired.
No  right  of  any  present  or  future  holder  of  any Senior  Indebtedness of
the Company to enforce subordination as herein provided shall at any time in any
way be  prejudiced  or  impaired by any act or failure to act on the part of the
Company or by any act or failure to act, in good faith,  by any such holder,  or
by any noncompliance by the Company with the terms,  provisions and covenants of
the Indenture, regardless of any knowledge thereof that any such holder may have
or otherwise be charged with.

                         Without  in  any  way  limiting  the  generality of the
foregoing  paragraph,  the holders of Senior Indebtedness of the Company may, at
any time and from time to time,  without the consent of or notice to the Trustee
or the holders of the Subordinated Debentures,  without incurring responsibility
to the holders of the Subordinated Debentures and without impairing or releasing
the  subordination  provided in this Article VI or the obligations  hereunder of
the  holders  of the  Subordinated  Debentures  to the  holders  of such  Senior
Indebtedness,  do any one or more of the following: (i) change the manner, place
or terms of payment or extend  the time of payment  of, or renew or alter,  such
Senior Indebtedness,  or otherwise amend or supplement in any manner such Senior
Indebtedness or any instrument  evidencing the same or any agreement under which
such  Senior  Indebtedness  is  outstanding;  (ii)  sell,  exchange,  release or
otherwise deal with any property pledged,  mortgaged or otherwise  securing such
Senior  Indebtedness;  (iii)  release  any  Person  liable in any manner for the
collection  of such  Senior  Indebtedness;  and (iv)  exercise  or refrain  from
exercising any rights against the Company and any other Person.


                                   ARTICLE VII

                          COVENANT TO LIST ON EXCHANGE

                         Section 7.1.  Listing  on  Exchange.   If  the
Subordinated Debentures are to be issued as a Global Security in connection with
the distribution of the Subordinated  Debentures to the holders of the Preferred
Securities  issued by the Trust upon the  dissolution of the Trust,  the Company
will use its best efforts to list such  Subordinated  Debentures on the American
Stock  Exchange or on such other  exchange as the Preferred  Securities are then
listed.


                                  

                                       -13-



                                  ARTICLE VIII

                         FORM OF SUBORDINATED DEBENTURE


                         Section 8.1.  Form   of  Subordinated  Debenture.
The   Subordinated   Debentures  and  the  Trustee's   Certificate  of
Authentication to be endorsed thereon are to be substantially in the following 
forms:

                    (FORM OF FACE OF SUBORDINATED DEBENTURE)

                         [IF  THE  SUBORDINATED  DEBENTURE  IS  TO  BE A GLOBAL
SECURITY,  INSERT:   This   Subordinated   Debenture  is  a  Global  Security
within the meaning of the Indenture hereinafter referred to and is registered in
the  name of a  Depository  or a  nominee  of a  Depositary.  This  Subordinated
Debenture is exchangeable for Subordinated  Debentures registered in the name of
a  person  other  than  the  Depositary  or its  nominee  only  in  the  limited
circumstances  described in the Indenture,  and no transfer of this Subordinated
Debenture  (other than a transfer of this  Subordinated  Debenture as a whole by
the  Depositary to a nominee of the Depositary or by a nominee of the Depositary
to the Depositary or another nominee of the Depositary) may be registered except
in limited circumstances.

                         Unless   this   Subordinated   Debenture   is
presented by an authorized  representative  of The Depository  Trust Company (55
Water Street, New York, New York) to the issuer or its agent for registration of
transfer,  exchange  or  payment,  and  any  Subordinated  Debenture  issued  is
registered  in the name of Cede & Co.  or such  other  name as  requested  by an
authorized representative of The Depository Trust Company and any payment hereon
is made to Cede & Co.,  ANY  TRANSFER,  PLEDGE OR OTHER USE  HEREOF FOR VALUE OR
OTHERWISE BY A PERSON IS WRONGFUL since the registered owner hereof, Cede & Co.,
has an interest herein.]





















                                       -14-





No.                                          $

CUSIP No.


                        TELEPHONE AND DATA SYSTEMS, INC.

             8.04% JUNIOR SUBORDINATED DEFERRABLE INTEREST DEBENTURE
                               DUE MARCH 31, 2038


                         TELEPHONE   AND   DATA   SYSTEMS,   INC.,    an
Iowa corporation (the "Company",  which term includes any successor  corporation
under  the  Indenture  hereinafter  referred  to),  for value  received,  hereby
promises  to  pay  to  _______  or  registered  assigns,  the  principal  sum of
____________  Dollars on March 31,  2038,  or such later  date  extended  by the
Company not later than March 31, 2047, and to pay interest on said principal sum
from February 10, 1998 or from the most recent interest  payment date (each such
date,  an  "Interest  Payment  Date")  to which  interest  has been paid or duly
provided for,  quarterly (subject to deferral as set forth herein) in arrears on
March 31, June 30, September 30 and December 31 of each year  commencing,  March
31, 1998, at the rate of 8.04% per annum until the  principal  hereof shall have
become due and payable,  and on any overdue  principal and premium,  if any, and
(without  duplication  and to the  extent  that  payment  of  such  interest  is
enforceable  under  applicable  law)  on any  overdue  installment  of  interest
compounded  quarterly at the same rate per annum. The amount of interest payable
on any Interest Payment Date shall be computed on the basis of a 360-day year of
twelve 30-day months. In the event that any date on which interest is payable on
this  Subordinated  Debenture  is not a Business  Day,  then payment of interest
payable on such date will be made on the next succeeding day which is a Business
Day (and  without any  interest or other  payment in respect of any such delay),
except that, if such Business Day is in the next succeeding  calendar year, such
payment shall be made on the  immediately  preceding  Business Day, in each case
with the same force and effect as if made on such date. The interest installment
so payable,  and punctually  paid or duly provided for, on any Interest  Payment
Date will,  as  provided in the  Indenture,  be paid to the Person in whose name
this Subordinated Debenture (or one or more Predecessor  Securities,  as defined
in said  Indenture) is registered at the close of business on the regular record
date for such interest  installment [which shall be the close of business on the
Business Day next  preceding  such Interest  Payment  Date.] [IF PURSUANT TO THE
PROVISIONS OF Section 2.11(C) OF THE INDENTURE THE  SUBORDINATED  DEBENTURES ARE
NO  LONGER  REPRESENTED  BY A GLOBAL  SECURITY  -- which  shall be the  close of
business on the ________ day  preceding  such Interest  Payment  Date.] Any such
interest  installment  not punctually  paid or duly provided for shall forthwith
cease to be payable to the  registered  holders on such regular record date, and
may be paid to the Person in whose name this  Subordinated  Debenture (or one or
more Predecessor Securities) is registered at the close of business on a special
record  date to be  fixed  by the  Trustee  for the  payment  of such  defaulted
interest, notice whereof shall be given to the registered holders of this series
of  Subordinated  Debentures  not less than ten (10) days prior to such  special
record  date,  or may be  paid  at any  time  in any  other  lawful  manner  not
inconsistent  with the  requirements  of any  securities  exchange  on which the
Subordinated  Debentures may be listed,  and upon such notice as may be required
by such exchange, all as more fully provided in the Indenture.  The principal of
(and premium,  if any) and the interest on this Subordinated  Debenture shall be
payable at the office or agency of the Trustee  maintained  for that  purpose in
Chicago, Illinois, in any coin or currency of the United


                                       -15-





States of America  which at the time of payment is legal  tender for  payment of
public and private  debts;  provided,  however,  that payment of interest may be
made at the option of the Company by check  mailed to the  registered  holder at
such  address as shall  appear in the  Security  Register.  Notwithstanding  the
foregoing,  so long as the holder of this Subordinated Debenture is the Property
Trustee,  the payment of the principal of (and premium,  if any) and interest on
this  Subordinated  Debenture  will be made at such place and to such account as
may be designated by the Property Trustee.

                         The  indebtedness  evidenced  by  this  Subordinated
Debenture  is,  to  the   extent  provided  in  the  Indenture,  subordinate
and  junior in right of  payment  to the  prior  payment  in full of all  Senior
Indebtedness,   and  this  Subordinated  Debenture  is  issued  subject  to  the
provisions  of  the  Indenture  with  respect  thereto.   Each  holder  of  this
Subordinated  Debenture, by accepting the same, (a) agrees to and shall be bound
by such  provisions,  (b)  authorizes  and directs the Trustee on behalf of such
holder to take such action as may be necessary or  appropriate to acknowledge or
effectuate  the  subordination  so  provided,   (c)  appoints  the  Trustee  the
attorney-in-fact  of such holder for any and all such purposes and (d) agrees to
treat this Subordinated  Debenture as indebtedness and not as equity for federal
income tax purposes. Each holder hereof, by acceptance hereof, hereby waives all
notice of the acceptance of the subordination provisions contained herein and in
the Indenture by each holder of Senior Indebtedness,  whether now outstanding or
hereafter   incurred,  and  waives  reliance  by each  such  holder  upon  said
provisions.

                         This  Subordinated  Debenture  shall  not   be
entitled to any benefit under the Indenture hereinafter referred to, be valid or
become obligatory for any purpose until the Certificate of Authentication hereon
shall have been signed by or on behalf of the Trustee.

                         Unless the  Certificate  of  Authentication  hereon
has been  executed by the Trustee  referred to on the reverse side hereof,  this
Subordinated  Debenture shall not be entitled to any benefit under the Indenture
or be valid or obligatory for any purpose.

                         The  provisions  of  this  Subordinated   Debenture
are continued on the reverse side hereof and such continued provisions shall for
all purposes have the same effect as though fully set forth at this place.


                                       -16-





                         IN WITNESS WHEREOF, the Company has
caused this instrument to be executed.


Dated: ___________

                                             TELEPHONE AND DATA SYSTEMS, INC.




                                             By
                                                  [Title]

Attest:


By
    Secretary

























                                       -17-





                     (FORM OF CERTIFICATE OF AUTHENTICATION)

                          CERTIFICATE OF AUTHENTICATION

                         This is one of the Subordinated Debentures of the
series of Subordinated Debentures described in the within-mentioned Indenture.




                 THE FIRST NATIONAL BANK               _______________________
                 OF CHICAGO,                           as Authentication Agent
                 Not in Its Individual
                 Capacity But Solely
                 as Trustee


                By                                      By
                     Authorized Signatory                  Authorized Signatory



                   (FORM OF REVERSE OF SUBORDINATED DEBENTURE)

                         This  Subordinated  Debenture  is  one  of  a  duly
authorized  series of Subordinated  Debentures of the Company (herein  sometimes
referred to as the "Subordinated  Debentures"),  specified in the Indenture, all
issued or to be issued in one or more series  under and pursuant to an Indenture
dated as of _______,  1998, duly executed and delivered  between the Company and
The First National Bank of Chicago, not in its individual capacity but solely as
trustee (the "Trustee"),  as supplemented by the Second  Supplemental  Indenture
dated as of _______,  1998 between the Company and the Trustee (the Indenture as
so  supplemented,  the  "Indenture"),  to  which  Indenture  and all  indentures
supplemental  thereto  reference is hereby made for a description of the rights,
limitations  of rights,  obligations,  duties and  immunities  thereunder of the
Trustee,  the  Company and the holders of the  Subordinated  Debentures.  By the
terms of the Indenture, the Subordinated Debentures are issuable in series which
may vary as to amount, date of maturity,  rate of interest and in other respects
as in the Indenture provided.  This series of Subordinated Debentures is limited
in  aggregate   principal  amount  as  specified  in  said  Second  Supplemental
Indenture.

                         Upon   the   occurrence  and  continuation  of  a  Tax
Event, in certain circumstances this Subordinated  Debenture will become due and
payable at the principal  amount together with any interest accrued thereon (the
"Redemption Price"). The Redemption Price shall be paid prior to 12:00 noon, New
York time, on the date of such redemption or at such earlier time as the Company
determines. The Company shall have the


                                       -18-





right to redeem  this  Subordinated  Debenture  at the  option  of the  Company,
without  premium or  penalty,  in whole or in part at any time on or after March
31, 2003 (an  "Optional  Redemption"),  at the  Redemption  Price.  Any Optional
Redemption  pursuant to this  paragraph will be made upon not less than 30 days'
nor more than 60 days' notice,  at the  Redemption  Price.  If the  Subordinated
Debentures  are only partially  redeemed by the Company  pursuant to an Optional
Redemption,  the Subordinated  Debentures will be redeemed pro rata or by lot or
by any other  method  utilized by the Trustee;  provided  that if at the time of
redemption, the Subordinated Debentures are registered as a Global Security, the
Depositary  shall  determine by lot the  principal  amount of such  Subordinated
Debentures held by each holder to be redeemed.

                         In  the  event  of  redemption  of  this  Subordinated
Debenture in part only, a new Subordinated Debenture or Subordinated  Debentures
of this series for the  unredeemed  portion hereof will be issued in the name of
the holder hereof upon the cancellation hereof.

                         In  case  an  Event  of  Default,  as  defined  in  the
Indenture,  shall have occurred and be  continuing,  the principal of all of the
Subordinated Debentures may be declared, and upon such declaration shall become,
due and payable,  in the manner,  with the effect and subject to the  conditions
provided in the Indenture.

                         The  Indenture   contains   provisions   permitting
the Company and the Trustee,  with the consent of the holders of not less than a
majority in aggregate  principal amount of the  Subordinated  Debentures of each
series affected at the time Outstanding, as defined in the Indenture, to execute
supplemental  indentures for the purpose of adding any provisions to or changing
in any manner or  eliminating  any of the  provisions of the Indenture or of any
supplemental  indenture  or of modifying in any manner the rights of the holders
of the Subordinated  Debentures;  provided,  however,  that no such supplemental
indenture shall (i) extend the fixed maturity of any Subordinated  Debentures of
any series, or reduce the principal amount thereof, or reduce the rate or extend
the time of payment of interest thereon,  or reduce any premium payable upon the
redemption  thereof,  without  the  consent of the  holder of each  Subordinated
Debenture so affected or (ii) reduce the aforesaid  percentage  of  Subordinated
Debentures,   the  holders  of  which  are  required  to  consent  to  any  such
supplemental indenture,  without the consent of the holders of each Subordinated
Debenture then  outstanding  and affected  thereby.  The Indenture also contains
provisions permitting the holders of a majority in aggregate principal amount of
the  Subordinated  Debentures  of any  series at the time  outstanding  affected
thereby, on behalf of all of the holders of the Subordinated  Debentures of such
series,  to waive any past default in the  performance  of any of the  covenants
contained  in the  Indenture,  or  established  pursuant to the  Indenture  with
respect to such series, and its consequences, except a default in the payment of
the  principal  of or premium,  if any,  or interest on any of the  Subordinated
Debentures of such series.  Any such consent or waiver by the registered  holder
of this  Subordinated  Debenture  (unless  revoked as provided in the Indenture)
shall be conclusive and binding upon such holder and upon all future holders and
owners of this Subordinated  Debenture and of any Subordinated  Debenture issued
in exchange  herefor or in place hereof  (whether by registration of transfer or
otherwise),  irrespective  of whether  or not any  notation  of such  consent or
waiver is made upon this Subordinated Debenture.

                         No  reference  herein  to  the  Indenture  and  no
provision  of this  Subordinated  Debenture or of the  Indenture  shall alter or
impair the obligation of the Company,  which is absolute and  unconditional,  to
pay the principal of and premium, if


                                       -19-





any,  and interest on this  Subordinated  Debenture at the time and place and at
the rate and in the money herein prescribed.

                         The  Company  shall  have  the  right  at  any  time
during the term of the Subordinated Debentures,  from time to time to extend the
interest  payment period of such  Subordinated  Debentures for up to twenty (20)
consecutive  quarters (an "Extended  Interest  Payment  Period"),  at the end of
which  period  the  Company  shall pay all  interest  then  accrued  and  unpaid
(together  with  interest  thereon at the rate  specified  for the  Subordinated
Debentures  to the extent that  payment of such  interest is  enforceable  under
applicable  law).  Before the termination of any such Extended  Interest Payment
Period,  the Company may further extend such Extended  Interest  Payment Period,
provided  that such  Extended  Interest  Payment  Period  together with all such
further extensions thereof shall not exceed twenty (20) consecutive  quarters or
extend beyond the maturity of the Subordinated Debentures. At the termination of
any such Extended  Interest  Payment  Period and upon the payment of all accrued
and unpaid  interest  then due, the Company may select a new  Extended  Interest
Payment Period.

                         As  provided  in  the  Indenture  and  subject  to
certain   limitations   therein  set  forth,  this  Subordinated   Debenture  is
transferable  by the  registered  holder hereof on the Security  Register of the
Company,  upon  surrender of this  Subordinated  Debenture for  registration  of
transfer  at  the  office  or  agency  of  the  Trustee  in  Chicago,  Illinois,
accompanied  by  a  written  instrument  or  instruments  of  transfer  in  form
satisfactory  to the Company or the  Trustee  duly  executed  by the  registered
holder  hereof or the attorney of such holder duly  authorized  in writing,  and
thereupon one or more new  Subordinated  Debentures of authorized  denominations
and for the same  aggregate  principal  amount and series  will be issued to the
designated  transferee or  transferees.  No service  charge will be made for any
such transfer,  but the Company may require payment of a sum sufficient to cover
any tax or other governmental charge payable in relation thereto.

                         Prior  to  due  presentment  for  registration  of
transfer of this Subordinated  Debenture,  the Company,  the Trustee, any paying
agent and any Security Registrar may deem and treat the registered holder hereof
as the absolute owner hereof (whether or not this  Subordinated  Debenture shall
be overdue and notwithstanding any notice of ownership or writing hereon made by
anyone other than the Security  Registrar) for the purpose of receiving  payment
of or on account of the principal  hereof and premium,  if any, and interest due
hereon and for all other  purposes,  and neither the Company nor the Trustee nor
any paying agent nor any Security  Registrar  shall be affected by any notice to
the contrary.

                         No  recourse  shall  be  had  for  the  payment of the
principal of or the interest on this  Subordinated  Debenture,  or for any claim
based hereon,  or otherwise in respect hereof,  or based on or in respect of the
Indenture,  against any incorporator,  stockholder,  officer or director,  past,
present or future,  as such, of the Company or of any  predecessor  or successor
corporation,  whether by virtue of any constitution,  statute or rule of law, or
by the enforcement of any assessment or penalty or otherwise, all such liability
being,  by the  acceptance  hereof  and as  part  of the  consideration  for the
issuance hereof, expressly waived and released.

                         [The  Subordinated  Debentures  of  this  series
are issuable only in registered form without coupons in denominations of $25 and
any integral  multiple  thereof.]  [This  Global  Security is  exchangeable  for
Subordinated Debentures in


                                       -20-





definitive  form  only  under  certain  limited  circumstances  set forth in the
Indenture. Subordinated Debentures of this series so issued are issuable only in
registered  form  without  coupons  in  denominations  of $25 and  any  integral
multiple  thereof.]  As  provided  in  the  Indenture  and  subject  to  certain
limitations  [herein and]  therein set forth,  Subordinated  Debentures  of this
series [so issued] are  exchangeable  for a like aggregate  principal  amount of
Subordinated  Debentures of this series of a different authorized  denomination,
as requested by the holder surrendering the same.

                         All terms used in this Subordinated Debenture
which are defined in the Indenture shall have the meanings assigned to them in 
the Indenture.


                                   ARTICLE IX

                    ORIGINAL ISSUE OF SUBORDINATED DEBENTURES

                         Section 9.1.   Original  Issue  of  Subordinated
Debentures.  Subordinated  Debentures  in  the  aggregate  principal  amount  of
$154,640,000  may,  upon  execution of this Second  Supplemental  Indenture,  be
executed by the Company and delivered to the Trustee for authentication, and the
Trustee shall thereupon authenticate and deliver said Subordinated Debentures to
or upon the written order of the Company, signed by its Chairman, its President,
or any Vice President and its Treasurer or an Assistant  Treasurer,  without any
further action by the Company.


                                    ARTICLE X

                                  MISCELLANEOUS

                         Section 10.1.   Ratification  of  Indenture.   The
Indenture,  as supplemented  by this Second  Supplemental  Indenture,  is in all
respects ratified and confirmed, and this Second Supplemental Indenture shall be
deemed part of the  Indenture in the manner and to the extent herein and therein
provided.

                         Section 10.2.   Trustee  Not  Responsible  for
Recitals.  The recitals herein  contained are made by the Company and not by the
Trustee,  and the Trustee assumes no responsibility for the correctness thereof.
The Trustee makes no  representation  as to the validity or  sufficiency of this
Second Supplemental Indenture.

                         Section 10.3.   Governing  Law.    This   Second
Supplemental  Indenture and each Subordinated  Debenture shall be deemed to be a
contract  made  under the  internal  laws of the State of New York,  and for all
purposes shall be construed in accordance with the laws of said State.

                         Section 10.4.  Separability.  In  case  any  one
or more of the provisions contained in this Second Supplemental  Indenture or in
the Subordinated Debentures shall for any reason be held to be invalid,  illegal
or unenforceable in any respect, such invalidity, illegality or unenforceability
shall not affect any other provisions of this Second  Supplemental  Indenture or
of the Subordinated  Debentures,  but this Second Supplemental Indenture and the
Subordinated Debentures shall be construed as if such invalid


                                       -21-





or illegal or unenforceable provision had never been contained herein or 
therein.

                         Section 10.5.  Counterparts.   This   Second
Supplemental  Indenture  may be executed in any number of  counterparts  each of
which shall be an original;  but such counterparts shall together constitute but
one and the same instrument.



































                                       -22-





                         IN  WITNESS  WHEREOF,  the  parties  hereto  have
caused  this  Second  Supplemental  Indenture to  be duly executed,  and their
respective  corporate seals to be hereunto affixed and attested,  on the date or
dates  indicated in the  acknowledgments  and as of the day and year first above
written.



                                            TELEPHONE AND DATA SYSTEMS, INC.




                                            By:_______________________________
                                                   Title:

[Corporate Seal]

Attest:


    Secretary



                                            THE FIRST NATIONAL BANK OF CHICAGO,
                                            not in its individual capacity
                                            but solely as Trustee




                                           By:_______________________________
                                                   Title:




[Corporate Seal]

Attest:

           Title:


                                       



STATE OF ILLINOIS )
COUNTY OF  COOK   ) ss:



     On the    day of _____, 1998, before me  personally  came ________________,
to   me known,  who,  being  by  me duly sworn,  did depose and say that he is a
______________  of TELEPHONE AND DATA  SYSTEMS,  INC.,  one of the  corporations
described  in and  which  executed  the  above  instrument;  that he  knows  the
corporate seal of said corporation; that the seal affixed to the said instrument
is such  corporate  seal;  that it was so affixed by  authority  of the Board of
Directors  of said  corporation,  and that he signed  his name  thereto  by like
authority.



                                           NOTARY PUBLIC

[seal]                                     Commission expires



STATE OF ILLINOIS   )
COUNTY OF COOK      ):



                         On the    day of___________, 1998, before me personally
came ____________,  to me known, who, being by me duly sworn, did depose and say
that he is the  ____________________  of THE FIRST NATIONAL BANK OF CHICAGO, one
of the corporations  described in and which executed the above instrument;  that
he knows the corporate  seal of said  corporation;  that the seal affixed to the
said  instrument is such corporate  seal; that it was so affixed by authority of
the Board of Directors of said corporation,  and that he signed his name thereto
by like authority.




                                          NOTARY PUBLIC

[seal]                                    Commission expires