<Page>


                             PROMISSORY NOTE



$76,556.00                                               Oklahoma City, Oklahoma
                                                              September 30, 2001

     FOR VALUE RECEIVED, the undersigned, LOGIX COMMUNICATIONS ENTERPRISES,
INC. (the "Borrower") on or before June 30, 2003, hereby unconditionally
promises to pay to the order of DOBSON CC LIMITED PARTNERSHIP (the "Lender") at
14201 Wireless Way, Oklahoma City, Oklahoma, 73134, in lawful money of the
United States of America, the principal sum of Seventy Six Thousand Five
Hundred Fifty Six and 00/100 ($76,556.00), or so much thereof as shall have
been advanced hereunder and remains unpaid, together with interest thereon as
hereinafter provided.

     Interest from the date hereof on the unpaid principal balance of this
Promissory Note ("Note") shall accrue and be due and payable quarterly,
commencing on the 31st day of December, 2001, and on the last day of each and
every March, June,  September, and December thereafter and at maturity.  All
payments made under this Note shall be made to the Lender by 12 noon, central
time, and applied first to the interest then accrued and then to the reduction
of the unpaid principal balance hereof.

     The unpaid principal balance hereof outstanding from time to time shall
bear interest (computed on the basis of 360 days in the year), at a rate per
annum which shall from day-to-day be equal to the lesser of:  (i) two percent
(2.0%) in excess of the Prime Rate, or (ii) the Maximum Rate.  Each change in
the rate charged hereunder, subject to the terms hereof, becomes effective
without notice to the Borrower, upon the effective date of each change in Prime
Rate, or the Maximum Rate, as the case may be.  As used herein, the term
"Maximum Rate" means the maximum rate of interest from time-to-time which the
Lender is allowed to contract for, charge for, take, reserve or receive under
applicable law, after taking into account, to the extent required by applicable
law, any and all relevant payments or charges hereunder and the term "Prime
Rate" shall mean the highest rate of interest expressed as a percentage as
published from time to time as the "Prime Rate" in the "Money Rates" section of
THE WALL STREET JOURNAL, SOUTHWEST EDITION.  Each determination by Lender of an
interest rate or an amount of interest that is due and payable by Borrower
shall be conclusive and binding on Borrower absent manifest error.

     Any sum not paid when due shall bear interest from the date of default at
the rate equal to fourteen percent (14%) per annum, accrued from the date of
default until paid.  During the existence of any default, the Lender may apply
payments received on any amount due hereunder or under the terms of any
instrument now or hereafter evidencing or securing the indebtedness evidenced
by this Note as the Lender may determine.

     The Borrower agrees that if, and as often as, this Note is placed in the
hands of an attorney for collection or to defend or enforce any of the Lender's
rights hereunder or under any instrument securing payment of this Note, the
Borrower will pay to the holder hereof its attorney's fees and all court costs
and other expenses incurred in connection therewith.


                                  Page 1
<Page>


     This Note is secured by a Pledge and Security Agreement (the "Pledge
Agreement") dated as of May 29, 2001 executed by Borrower in favor of Lender,
covering shares of capital stock of Dobson Telephone Company, Inc., Logix
Communications Corporation, and Dobson Fiber/Forte of Colorado, Inc., the
proceeds from the sale of all or any of such shares of capital stock, and
certain other assets of Borrower.  This Note and such Pledge Agreement will be
referred to herein as the "Loan Documents."

     The terms, provisions and conditions of the Loan Documents are
incorporated herein by reference as if set forth in full herein, provided that,
in the event of any ambiguity as between the Note and the Loan Documents, this
Note shall control.

     Upon the breach of any provision of the Loan Documents, or any other
instrument securing payment of this Note, or an Event of Default as defined in
the Pledge Agreement, at the option of the Lender, following any notice and/or
grace period set forth in the Loan Documents the entire unpaid indebtedness
evidenced by this Note will become due, payable and collectable immediately or
at such time thereafter as the Lender hereof may elect.  Notice of the exercise
of such option is hereby expressly waived.  Failure of the Lender hereof to
exercise such option will not constitute a waiver of the right to exercise the
same.

     This Note is given by Borrower and accepted by Lender hereof pursuant to
the lending transaction contracted, negotiated, consummated and to be performed
in Oklahoma City, Oklahoma County, Oklahoma, and this Note is to be construed
according to the laws of the State of Oklahoma.  All loan proceeds advanced and
to be advanced under this Note are solely for a business purpose.

     Regardless of any provision contained herein or in any of the Loan
Documents, the Lender shall never be entitled to receive, collect or apply as
interest on this Note, any amount in excess of the Maximum Rate, and, in the
event Lender ever receives, collects or applies as interest any such excess,
such amount which would be excessive interest shall be deemed a partial
prepayment of the principal and treated hereunder as such; and, if the total
outstanding principal is paid in full, any remaining excess shall forthwith be
paid to the Borrower.  In determining whether or not the interest paid or
payable under any specific contingency, exceeds the Maximum Rate, Borrower and
holder hereof shall, to the maximum extent permitted under applicable law;  (i)
characterize any non-principal payment as an expense, fee or premium rather
than as interest, (ii) exclude voluntary prepayments and the effects thereof,
and (iii) amortize, prorate, allocate and spread, in equal parts, the total
amount of interest throughout the entire contemplated term hereof.  If the
indebtedness evidenced hereby is paid and performed in full prior to the end of
the contemplated term hereof, and if the interest received for the actual
period of existence hereof exceeds the Maximum Rate, Lender shall refund to
Borrower the amount of such excess, and, in such event, Lender shall not be
subject to any penalties provided by any laws for contracting for, charging,
taking, reserving or receiving interest in excess of the Maximum Rate.

     The Borrower may prepay the indebtedness evidenced hereby in whole or in
part at any time without penalty.  The aggregate unpaid principal of all
advances under this Note shall be the principal amount owing and unpaid on this
Note, and all amounts outstanding on this Note shall be determined solely from
the records of the Lender. The makers, endorsers, sureties,


                                  Page 2
<Page>


guarantors and all persons who may become liable for all or any part of this
obligation severally waive presentment for payment, protest and notice of
nonpayment.  Said parties consent to any extension of time (whether one or
more) of payment hereof, any renewal (whether one or more) hereof, release of
all or any part of the security for the for payment hereof, release of any
party liable for the payment of this obligation, acceptance of additional
collateral or security or guarantor for the payment of this obligation, or any
amendment or modification thereto.  Any such extension, renewal, release,
acceptance, amendment or modification may be made without note to any such
party and without discharging said party's liability hereunder.

     The Lender and Borrower hereof recognize that because their domiciles may
differ, they might agree to the laws of various states to apply to the
interpretation and execution of this Note, and for simplicity and certainty,
the parties hereto agree that this Note shall be deemed to have been made,
execute and delivered in the State of Oklahoma, and the rights and liabilities
of the parties hereto shall be determined in accordance with the laws of State
of Oklahoma except with respect to procedural laws of the situs state governing
the foreclosure of the Mortgage.

     The acceptance of this Note by Lender shall not constitute a commitment by
Lender to make advances hereunder.  Advances will be made at Lender's sole
discretion.

     IN WITNESS WHEREOF, the undersigned Borrower has executed this Promissory
Note this 30th day of September, 2001.


BORROWER:                                LOGIX COMMUNICATIONS ENTERPRISES, INC.,
                                         an Oklahoma corporation


                                         /s/ CRAIG T. SHEETZ
                                         ---------------------------------------
                                         Craig T. Sheetz
                                         President and Chief Executive Officer












                                  Page 3