AMENDED AND RESTATED TAX ALLOCATION AGREEMENT


     AGREEMENT  dated  as of this 1st day of May,  2000,  by and  among  Horizon
Telcom,  Inc.  (hereinafter  referred to as "Parent") and its Subsidiaries:  The
Chillicothe Telephone Company, Horizon Personal Communications, Inc. ("PerCom"),
United  Communications,  Inc.,  Horizon  Services,  Inc. and Horizon,  PCS, Inc.
("PCS") (hereinafter  collectively referred to as "Subsidiaries" or individually
sometimes as "Subsidiary").

                                   WITNESSETH

     WHEREAS,  the parties hereto are members of an affiliated group (Affiliated
Group) as defined in Code Section 1504(a); and WHEREAS, the Affiliated Group was
formed  on  January  1, 1996 and is a  successor  to The  Chillicothe  Telephone
Company affiliated group under Treasury Regulation Section 1.1502-75(d); and

     WHEREAS, in 1997, Parent and certain of the Subsidiaries entered into a Tax
Allocation  Agreement (the "Agreement");  and WHEREAS,  the Affiliated Group has
filed a U.S.  consolidated  income  tax return for its 1996 tax year and for all
tax years thereafter; and

     WHEREAS,  pursuant to a Contribution  and Exchange  Agreement,  Parent will
transfer  its shares in PerCom to PCS in exchange for shares of PCS, and certain
holders of membership interests in Bright Personal Communications  Services, LLC
("Bright")  will transfer  part of their  interests in Bright to PCS in exchange
for PCS  shares;  and a public  offering  of PCS  shares  is  contemplated;  the
collective  effect of all which could (either alone or in connection  with other
transactions) result in PCS and PerCom no longer being members of the Affiliated
Group (the "Deconsolidation"); and




     WHEREAS,  the  Parent  and  Subsidiaries  wish to  amend  and  restate  the
Agreement to contemplate the aforementioned transactions; and

     NOW  THEREFORE,  in  consideration  of the mutual  covenants  and  promises
contained herein, the parties hereto agree as follows:

     1.   A U.S. consolidated income tax return shall be filed by Parent for the
          tax year ended  December 31,  1996,  and for each  subsequent  taxable
          period in respect of which this  Agreement  is in effect and for which
          the  Affiliated  Group is required or permitted to file a consolidated
          tax return. Each Subsidiary, if not previously done, shall execute and
          file such consent, elections, and other documents that may be required
          or appropriate for the proper filing of such returns.

     2.   a. For each  accounting  period,  each member of the Affiliated  Group
          shall  allocate  tax  expenses or benefits to the members of the group
          for  financial  reporting  purposes  based on each  member's  relative
          contribution to the group's consolidated tax liability. Each member of
          the  Affiliated  Group  shall  compute  its  deferred  tax  assets and
          liabilities  in the same manner.  This method is known as the Pro Rata
          Method under FASB Statement of Financial Accounting Standards No. 109,
          "Accounting for Income Taxes."

          b. For each tax period, the earnings and profits of each member of the
          Affiliated  Group shall be determined by allocating  the  consolidated
          tax liability  among the members of the group in  accordance  with the
          ratio which that portion of consolidated  taxable income  attributable
          to each member of the group having  taxable income bears to the sum of
          the  taxable   income  of  such  members   pursuant  to  Code  Section
          1552(a)(1).

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          c. No election to allocate tax  liability  under  Treasury  Regulation
          Section 1.1502-33(d) has been made by the Affiliated Group.

          d. To the extent that the tax  allocation  methods  under Item "a" and
          Item  "b" are  different,  such  differences  shall  be  treated  as a
          distribution or capital contribution for income tax purposes.

     3.   Payment of the  consolidated  tax liability for a taxable period shall
          include the payment of estimated tax installments due for such taxable
          period,  and each  Subsidiary  shall pay to  Parent  its share of each
          payment  within  thirty days of receiving  notice of such payment from
          Parent, but in no event later than the due date for each such payment.
          Any amounts  paid by a Subsidiary  on account of a separate  return or
          separate   estimated  tax  payments  that  are  credited  against  the
          consolidated  tax liability of the Affiliated  Group shall be included
          in determining the payments due from such Subsidiary.  Any overpayment
          of estimated tax should be refunded to the Subsidiary.

     4.   a. If for any taxable  period the  separate  return  liability  of any
          member  of  the  Affiliated  Group,   including  Parent,  exceeds  the
          consolidated  tax  liability for such period as a result of any excess
          losses or tax credits of one or more members, then Parent shall pay to
          each such member its  allocable  portion of such excess  amount within
          thirty  days after the date of filing on the  consolidated  return for
          such period.

          b.  Notwithstanding the provisions of Paragraph 4(a) hereof,  pursuant
          to a Loan Agreement  between the Rural Telephone  Finance  Cooperative
          (the "RTFC") and PerCom dated May 31, 2000,  Parent shall pass through
          tax benefits in the form of cash  payments to PerCom on the  following


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          dates  equal to the lesser of (i)  $4,522,000  by December  31,  2000;
          $4,619,000 by December 31, 2001;  and $1,196,000 by December 31, 2002;
          or (ii) a positive  dollar  amount  equivalent to 34% of PerCom's book
          net loss for such year (if any).  To the  extent  that  PerCom  and/or
          Parent do not have final net income  calculations  by December 31st of
          any given year,  such parties  shall use their best efforts to provide
          an estimated cash payment in accordance with the payment  schedule set
          forth  in  this   Paragraph  4(b)  by  December  31st  of  said  year;
          thereafter,  based on the latest  available tax  information but in no
          event  later  than  March  31st of the  following  year,  a  "true-up"
          calculation  shall be made  whereby  Parent  shall  provide  PerCom an
          additional  cash payment in accordance  with the payment  schedule set
          forth  in this  Paragraph  4(b)  (if the  December  31st  payment  was
          underestimated) or PerCom, at Parent's option,  shall provide Parent a
          refund  payment (if the  December  31st  payment  was  overestimated).
          Notwithstanding  the timing of any  true-ups  and  whenever the year's
          final tax return is filed,  Parent shall continue to be liable for any
          necessary  payments in accordance with the payment  schedule set forth
          in this Paragraph 4(b).

     5.   If part or all of an  unused  loss or tax  credit  is  allocated  to a
          member  of  the  Affiliated  Group  pursuant  to  Treasury  Regulation
          Sections 1.1502-79,  1.1502-79A or 1.1502-21(b) and is carried back or
          forward to a year in which such  member  filed a separate  return or a


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          consolidated  return  with  another  affiliated  group,  any refund or
          reduction in tax  liability  arising  from the  carryback or carryover
          shall be retained by such member.  Notwithstanding  the above,  Parent
          shall  determine  whether an election  shall be made not to carry back
          part or all of a  consolidated  net operating loss for any tax year in
          accordance with Code Section 172(b)(3).

     6.   If the  consolidated tax liability is adjusted for any taxable period,
          whether by means of an amended return,  claims for refund,  or after a
          tax audit by the  Internal  Revenue  Service,  the  liability  of each
          member shall be recomputed to give effect to such adjustments,  and in
          the case of a refund, Parent shall make payment to each member for its
          share of the refund,  determined  in the same manner as in Paragraph 2
          above,  within thirty days after the refund is received by Parent, and
          in the case of an increase in tax liability,  each member shall pay to
          Parent its allocable  share of such  increased  tax  liability  within
          thirty days after receiving notice of such liability from Parent.

     7.   If  during a  consolidated  return  period  Parent  or any  Subsidiary
          acquires  or  organizes  another  corporation  that is  required to be
          included in the consolidated  return, then such corporation shall join
          in and be bound by this Agreement.

     8.   This  Agreement  shall apply to the tax year ended  December 31, 1996,
          and all subsequent  taxable periods unless Parent and the Subsidiaries
          agree to terminate this Agreement.  Notwithstanding  such termination,
          this Agreement shall continue in effect with respect to any payment or
          refunds due for all taxable periods prior to termination.

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     9.   The  consolidated  tax  liability  of the  Affiliated  Group  shall be
          determined in accordance with Treasury Regulation Section 1.1502-2 and
          shall  include  any  Alternative  Minimum  Tax  pursuant  to  Proposed
          Treasury Regulation Sections 1.1502-2(a)(ii) and 1.1502-55.

     10.  The  parties  acknowledge  that there is an excess loss  account  (the
          "ELA"),  pursuant to Treasury Regulations  1.1502-19,  with respect to
          the  shares  held by Parent in PerCom and that the  transfer  of these
          shares to PCS will result in Parent  having an ELA with respect to its
          PCS shares and PCS  having an ELA with  respect to its PerCom  shares.
          The parties hereby agree that  notwithstanding  any other provision in
          this Agreement that the tax attributable to the recognition of any ELA
          as a result of any  Deconsolidation  will be solely the responsibility
          of Parent, and Parent will not seek contribution from PerCom or PCS to
          pay any of the tax cost of the  recognition of the ELA.  Determination
          of the  amount  and the  tax  cost of the  ELA  recognition  shall  be
          accomplished  by Arthur  Andersen  and Company and its  determinations
          shall be final.

     11.  In the event any Subsidiary (the "Deconsolidated  Subsidiary") files a
          separate return or participates in a consolidated  return with a group
          other than the Affiliated  Group,  Parent agrees to indemnify and hold
          harmless the  Deconsolidated  Subsidiary  from any  liability  imposed
          pursuant to Treasury Regulation  1.1502-6,  or any successor provision
          having similar  effect,  which  liability is not  attributable  to the
          taxable income of the  Deconsolidated  Subsidiary  recognized while it
          was a member  of the  Affiliated  Group.  The  taxable  income  of the
          Deconsolidated  Subsidiary  for any year for  which it was a member of


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          the Group shall be  determined  based on the  principles  of Paragraph
          2(b) of this Agreement.

     12.  This  Agreement  shall be binding upon and inure to the benefit of any
          successor,  to any of the parties hereto, to the same extent as if the
          successor had been an original party to the agreement.

     13.  References to the Code refer to the Internal  Revenue Code of 1986, as
          amended  or  superseded.  References  to a section of or tax under the
          Code includes all amendments and successor provisions corresponding to
          any such  section  or tax in force  after the date of this  Agreement.
          References  to tax terms  which have  defined  meaning  under the code
          shall have such defined meaning.

     14.  No person who is not a party hereto is intended to be a beneficiary of
          this Agreement;  provided however,  that the parties hereby agree that
          Lender,  the RTFC, under a Loan Agreement  between the RTFC and PerCom
          dated May 31, 2000,  is an intended  third party  beneficiary  of this
          Agreement  and that this  paragraph  shall create a right and cause of
          action under this  Agreement in and on behalf of the RTFC  relating to
          PerCom's obligation under such Loan Agreement,  to enforce the payment
          by Parent of its  obligations to Borrower  and/or PerCom,  as provided
          for in this Agreement.

     15.  This Agreement shall be governed by the laws of the State of Ohio.



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     IN WITNESS  WHEREOF,  the parties  hereto have caused this  Agreement to be
executed by their duly authorized representative on the date indicted above.

Horizon Telcom, Inc.                     United Communications, Inc.

By /s/ Thomas McKell                     By /s/ Phoebe H. McKell
   ---------------------------------        ---------------------------------

Its President                            Its President



The Chillicothe Telephone Company             Horizon Services, Inc.

By /s/ Thomas McKell                     By /s/ Phoebe H. McKell
   ---------------------------------        ---------------------------------

Its President                            Its President



Horizon Personal Communications, Inc.         Horizon PCS, Inc.

By /s/ Walter A. McKell                  By /s/ Walter A. McKell
   ---------------------------------        ---------------------------------

Its President                            Its President


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