COMCAST CORP
8-K, 1999-11-03
CABLE & OTHER PAY TELEVISION SERVICES
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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

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



                                    FORM 8-K

                                 CURRENT REPORT


                     PURSUANT TO SECTION 13 OR 15(d) of the
                        SECURITIES EXCHANGE ACT OF 1934


       Date of Report (Date of earliest event reported): November 2, 1999


                              COMCAST CORPORATION
          ------------------------------------------------------------
            (Exact name of registrant as specified in its charter)

  Pennsylvania                      0-6983                        23-1709202
- -----------------            ---------------------            ------------------
(State or other                (Commission file                 (IRS employer
jurisdiction of                    number)                      identification
incorporation)                                                        no.)

            1500 Market Street, Philadelphia, PA          19102-2148
        ----------------------------------------------------------------
           (Address of principal executive offices)        (Zip Code)

       Registrant's telephone number, including area code (215) 665-1700
                                                         -------------------


<PAGE>



Item 5.  Other Events.

     Exhibits are filed herewith in connection with the Registration Statement
on Form S-3 (File No. 333-81391) originally filed on June 23, 1999 by Comcast
Corporation (the "Company").

     On November 2, 1999, the Company, Salomon Smith Barney Inc. and Merrill
Lynch, Pierce, Fenner & Smith Incorporated (the "Underwriters") entered into an
underwriting agreement (the "Underwriting Agreement") pursuant to which the
Underwriters agreed to purchase 7,000,000 of the Company's 2.0% Exchangeable
Subordinated Debentures due November 2029 (the "Debentures"). The Underwriting
Agreement is filed as an exhibit hereto, as well as a Form of Debenture.

     On November 3, 1999, the Company filed a prospectus supplement (the
"Prospectus Supplement") pursuant to Rule 424(b) of the Securities Act of 1933,
as amended, relating to the Debentures.


                                       2

<PAGE>



Item 7.  Financial Statements and Exhibits.

     (c) Exhibits.

     1.   Underwriting Agreement dated as of November 2, 1999 between the
          Company, Salomon Smith Barney Inc. and Merrill Lynch, Pierce, Fenner
          & Smith Incorporated.

     4.   Form of Debenture.





                                       3

<PAGE>



                                   SIGNATURE

     Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this report to be signed on its behalf by the
undersigned, thereunto duly authorized.


Dated: November 3, 1999             COMCAST CORPORATION


                                    By: /s/ William E. Dordelman
                                        -----------------------------------
                                        Name:  William E. Dordelman
                                        Title: Vice President





                                       4

<PAGE>



                                 EXHIBIT INDEX


Exhibit No.                          Exhibit

     1.        Underwriting Agreement dated as of November 2, 1999
               between the Company, Salomon Smith Barney Inc. and
               Merrill Lynch, Pierce, Fenner & Smith Incorporated.

     4.        Form of Debenture.



                                                                      EXHIBIT 1

                             UNDERWRITING AGREEMENT



                                                                November 2, 1999


Comcast Corporation
1500 Market Street
Philadelphia, Pennsylvania 19102-2148

Dear Sirs:

     We (the "Underwriter") understand that Comcast Corporation, a Pennsylvania
corporation (the "Company"), proposes to issue and sell $571,427,500 aggregate
principal amount of 2.0% Exchangeable Subordinated Debentures due November 2029
(the "Offered Securities"). The Offered Securities are to be issued pursuant to
the provisions of the Indenture (the "Indenture") by and between the Company
and Bankers Trust Company (the "Trustee").

     Subject to the terms and conditions set forth or incorporated by reference
herein, the Company hereby agrees to sell and the Underwriter agrees to
purchase 7,000,000 Offered Securities set forth below at a purchase price of
$80.00 per ZONES (as hereinafter defined), plus accrued interest, if any, from
November 5, 1999 to the date of payment and delivery (the "Purchase Price").

     The Underwriter will pay for the Offered Securities upon delivery thereof
at the offices of Davis Polk & Wardwell, 450 Lexington Avenue, New York, New
York at 10:00 a.m. (New York time) on November 5, 1999, or at such other time,
not later than 5:00 p.m. (New York time) on November 10, 1999 as shall be
designated in writing by the Underwriter and the Company. The time and date of
such payment and delivery are hereinafter referred to as the Closing Date.

     The Offered Securities shall have the terms set forth in the Prospectus
dated September 15, 1999, and the Prospectus Supplement dated November 2, 1999
(together, the "Prospectus"), including the following:

Terms of Offered Securities

         Securities: 2.0% Exchangeable Subordinated Debentures due November 2029
         (each, a "ZONES").

         Maturity Date: November 15, 2029.



<PAGE>



         Interest Rate: Interest will be paid quarterly in an amount equal to
         $0.4082 per ZONES, or 2.0% per year of the original principal amount,
         plus the amount of any cash dividend paid on the reference shares
         attributable to each ZONES.

         Redemption Provisions: Company may redeem at any time all but not some
         of the ZONES as a redemption price equal to the sum of (a) the higher
         of the Contingent Principal Amount of the ZONES or the sum of the
         Current Market Value of the Reference Shares plus any deferred
         quarterly payments of interest, plus, in either case, the Final Period
         Distribution, and (b) $3.6735 per ZONES if redeemed prior to November
         15, 2000, $2.4490 per ZONES if redeemed prior to November 15, 2001,
         $1.2245 per ZONES if redeemed prior to November 15, 2002, or zero per
         ZONES if redeemed any time on or after November 15, 2002.

         If, at any time on or prior to January 30, 2000, a "tax event" shall
         occur and be continuing, the Company will have the right exercisable
         within 180 days after such "tax event", upon not less than 15 business
         days notice, to redeem the ZONES, in whole, at a redemption price
         equal to the higher of the Contingent Principal Amount of the ZONES or
         the sum of the Current Market Value of the Reference Shares,
         determined by reference to an averaging period of 5 rather than 20
         trading days, plus, in either case, the Final Period Distribution
         (computed by accounting for the 5 day averaging period), plus any
         deferred quarterly payments of interest.

         A "tax event" means that the Trustee shall have received an opinion of
         nationally recognized independent tax counsel experienced in such
         matters to the effect that as a result of (a) any amendment to,
         clarification of, or change (including any announced prospective
         change) in the laws, or any regulations thereunder, of the United
         States or any political subdivision or taxing authority thereof or
         therein, or (b) any judicial decision, official administrative
         pronouncement, ruling, regulatory procedure, notice or announcement,
         including any notice or announcement of intent to adopt such
         procedures or regulations, in each case, on or after the date of the
         prospectus supplement (a "change in tax law"), there is the creation
         by such change in tax law of a substantial risk that, as a result of
         entrance into the ZONES, the Company will be treated for purposes of
         Section 1259 of the Internal Revenue Code as having constructively
         sold some or all of its Sprint Corporation PCS Stock.

         Interest Payment Dates: February 15, May 15, August 15, and November 15
         commencing February 15, 2000.

         Form and Denomination: One Global ZONES will be deposited with The
         Depository Trust Company and the ZONES will be transferrable by
         book-entry only.


                                       2

<PAGE>



         Ranking: Unsecured and subordinated obligations of the Company.

         Conversion Provisions: Not applicable.

         Exchange Provisions: Exchangeable, at holder's option, for an amount
         of cash equal to 95% (subject to adjustment as described in the
         Prospectus) of the market value of a share of Sprint Corporation PCS
         stock and any other publicly traded equity securities that may be
         distributed on or in respect of the Sprint PCS Stock.

         Lock Up: Company will not, during the period ending 45 days after the
         date of the Prospectus Supplement, directly or indirectly offer, sell,
         offer to sell, grant any option for the sale of or otherwise dispose
         of any ZONES, any securities convertible into or exchangeable for the
         ZONES or any equity securities substantially similar to the ZONES
         without the prior written consent of Salomon Smith Barney, Inc.

         Over-allotment Option: The Underwriter will have the option to
         purchase up to 1,050,000 additional ZONES at the Purchase Price to
         cover over-allotments. The Underwriter can exercise this option for a
         period of 30 days after the date hereof.

         Other Terms: This Agreement may be terminated in the absolute
         discretion of the Underwriter by notice given to the Company, if
         between 12:01am and 6:00pm, New York City time, on November 2, 1999,
         there shall have occurred any development relating to or affecting the
         proposed merger between Sprint Corporation and MCI WorldCom Inc. which
         would, in the judgment of the Underwriter, make it impracticable or
         inadvisable to consummate the offering of the ZONES.

         Capitalized terms used above and not defined herein shall have the
meanings set forth in the Prospectus referred to above.

         Except as set forth below, all provisions contained in the document
entitled Comcast Corporation Underwriting Agreement Standard Provisions (Debt
Securities, Warrants, Purchase Contracts and Units) dated September 20, 1999
(the "Standard Provisions"), a copy of which is attached hereto, are herein
incorporated by reference in their entirety and shall be deemed to be a part of
this Agreement to the same extent as if such provisions had been set forth in
full herein, except that (i) if any term defined in such document is otherwise
defined herein, the definition set forth herein shall control, (ii) all
references in such document to a type of security that is not an Offered
Security shall not be deemed to be a part of this Agreement and (iii) all
references in such document to a type of agreement that has not been entered
into in connection with the transactions contemplated hereby shall not be
deemed to be a part of this Agreement.

                                       3

<PAGE>



Please confirm your agreement by having an authorized officer sign a copy of
this Agreement in the space set forth below.


                                      Very truly yours,


                                      SALOMON SMITH BARNEY INC.
                                      MERRILL LYNCH, PIERCE, FENNER &
                                      SMITH INCORPORATED

                                      Acting severally on behalf of themselves
                                      and the several Underwriters named herein

                                      By: SALOMON SMITH BARNEY INC.

                                      By: /s/ Alan M. Rifkin
                                        ----------------------------------------
                                        Name:  Alan M. Rifkin
                                        Title: Vice President


Accepted:

COMCAST CORPORATION


By: /s/ William E. Dordelman
    -------------------------------
    Name:  William E. Dordelman
    Title: Vice President - Finance


                                       4

<PAGE>



                              COMCAST CORPORATION


                             UNDERWRITING AGREEMENT


                              STANDARD PROVISIONS

           (DEBT SECURITIES, WARRANTS, PURCHASE CONTRACTS AND UNITS)


                               September 20, 1999


     From time to time, Comcast Corporation, a Pennsylvania corporation (the
"Company"), may enter into one or more underwriting agreements that provide for
the sale of designated securities to the several underwriters named therein.
The standard provisions set forth herein may be incorporated by reference in
any such underwriting agreement (an "Underwriting Agreement"). The Underwriting
Agreement, including the provisions incorporated therein by reference, is
herein referred to as this Agreement. Terms defined in the Underwriting
Agreement are used herein as therein defined.

     The Company proposes to issue from time to time (a) its debt securities
("Debt Securities"), (b) warrants ("Warrants") and (c) purchase contracts
("Purchase Contracts") requiring the holders thereof to purchase or sell (i)
securities of an entity unaffiliated with the Company, a basket of such
securities, an index or indices of such securities or any combination of the
above, (ii) currencies or composite currencies or (iii) commodities. Debt
Securities, Purchase Contracts and Warrants or any combination thereof may be
offered in the form of Units ("Units"). As used herein, the term "Debt
Securities" includes prepaid Purchase Contracts.

     The Company has filed with the Securities and Exchange Commission (the
"Commission") a registration statement including a prospectus relating to the
Debt Securities, Warrants, Purchase Contracts and Units (collectively, the
"Securities") and has filed with, or transmitted for filing to, or shall
promptly after the date of the Underwriting Agreement file with or transmit for
filing to, the Commission a prospectus supplement (the "Prospectus Supplement")
pursuant to Rule 424 under the Securities Act of 1933, as amended (the
"Securities Act"), specifically relating to the Securities offered pursuant to
this Agreement (the "Offered Securities"). The term Registration Statement
means the registration statement as amended to the date of the Underwriting
Agreement including any additional registration statement filed by the Company
pursuant to Rule 462(b). The term Basic Prospectus means the prospectus
included in the Registration Statement. The term Prospectus means the Basic
Prospectus together with the Prospectus Supplement. The term preliminary
prospectus means a preliminary


<PAGE>



prospectus supplement specifically relating to the Offered Securities, together
with the Basic Prospectus. As used herein, the terms "Basic Prospectus",
"Prospectus" and "preliminary prospectus" shall include in each case the
documents, if any, incorporated by reference therein. The terms "supplement",
"amendment" and "amend" as used herein shall include all documents deemed to be
incorporated by reference in the Prospectus that are filed subsequent to the
date of the Basic Prospectus by the Company with the Commission pursuant to the
Securities Exchange Act of 1934, as amended (the "Exchange Act"). If the
Company has filed an abbreviated registration statement to register additional
Debt Securities and Warrants pursuant to Rule 462(b) under the Securities Act
(the "Rule 462 Registration Statement"), then any reference herein to the term
"Registration Statement" shall be deemed to include such Rule 462 Registration
Statement.

     1. Representations and Warranties. The Company represents and warrants to
each of the Underwriters as of the date of the Underwriting Agreement that (i)
each document filed or to be filed pursuant to the Exchange Act and
incorporated by reference in the Prospectus complied or will comply when so
filed in all material respects with the Exchange Act and the rules and
regulations of the Commission thereunder and (ii) the Registration Statement
and Prospectus comply in all material respects with the Securities Act and the
rules and regulations of the Commission thereunder and do not contain any
untrue statement of a material fact or omit to state any material fact required
to be stated therein or necessary to make the statements therein not
misleading, except that the foregoing representations and warranties do not
apply to (a) that part of the Registration Statement which shall constitute the
Statement of Eligibility of the Trustee on Form T-1 (the "Form T-1") and (b)
statements or omissions in the Registration Statement or the Prospectus or any
amendment or supplement thereto based upon information furnished to the Company
in writing by any Underwriter through the Manager expressly for use therein.

     2. Public Offering. The Company is advised by the Manager that the
Underwriters propose to make a public offering of their respective portions of
the Offered Securities as soon after this Agreement has been entered into as in
the Manager's judgment is advisable. The terms of the public offering of the
Offered Securities are set forth in the Prospectus.

     3. Purchase and Delivery. Except as otherwise provided in this Section 3,
payment for the Offered Securities shall be made to the Company in Federal or
other funds immediately available in New York City at the time and place set
forth in the Underwriting Agreement, upon delivery to the Manager for the
respective accounts of the several Underwriters of the Offered Securities
registered in such names and in such denominations as the Manager shall request
in writing not less than one full business day prior to the date of delivery,
with any transfer taxes payable in connection with the transfer of the Offered
Securities to the Underwriters duly paid.


                                       2

<PAGE>



     4. Conditions to Closing. The several obligations of the Underwriters
hereunder are subject to the following conditions:

          (a) No stop order suspending the effectiveness of the Registration
     Statement shall be in effect, and no proceedings for such purpose shall be
     pending before or threatened by the Commission, and there shall have been
     no material adverse change in the condition, business or operations of the
     Company and its subsidiaries, as a whole, from that set forth in the
     Prospectus; and the Manager shall have received, on the Closing Date, a
     certificate, dated the Closing Date and signed by an executive officer of
     the Company, to the foregoing effect. Such certificate will also provide
     that the representations and warranties of the Company contained herein
     are true and correct as of the Closing Date. The officer making such
     certificate may rely upon the best of his knowledge as to proceedings
     threatened.

          (b) The Manager shall have received on the Closing Date an opinion of
     Arthur R. Block, Esquire, Senior Deputy General Counsel of the Company,
     dated the Closing Date, to the effect that:

               (i) the Company has been duly incorporated, is validly existing
          as a corporation subsisting under the laws of the Commonwealth of
          Pennsylvania and is duly qualified to transact business and is in
          good standing in each jurisdiction in which the conduct of its
          business or its ownership or leasing of property requires such
          qualification (except where the failure to so qualify would not have
          a material adverse effect upon the business or financial condition of
          the Company and its subsidiaries, as a whole),

               (ii) each of Comcast Cable Communications, Inc. and QVC, Inc.
          (such corporations are together the "specified subsidiaries" of the
          Company and each is a "specified subsidiary" of the Company) has been
          duly incorporated, is validly existing as a corporation in good
          standing under the laws of the jurisdiction of its incorporation and
          is duly qualified to transact business and is in good standing in
          each jurisdiction in which the conduct of its business or its
          ownership or leasing of property requires such qualification (except
          where the failure to so qualify would not have a material adverse
          effect upon the business or financial condition of the Company and
          its subsidiaries, as a whole),

               (iii) each of the Senior Indenture dated as of June 15, 1999
          (the "Senior Indenture") between the Company and Bank of Montreal
          Trust Company, as trustee, and the Subordinated Indenture dated as of
          June 15, 1999 (the "Subordinated Indenture") between the Company and

                                       3

<PAGE>



          Bankers Trust Company, as trustee has been duly authorized, executed
          and delivered by the Company,

               (iv) the Warrant Agreement, if any, has been duly authorized,
          executed and delivered by the Company,

               (v) the Unit Agreement, if any, has been duly authorized,
          executed and delivered by the Company,

               (vi) the Offered Securities have been duly authorized by the
          Company,

               (vii) this Agreement has been duly authorized, executed and
          delivered by the Company,

               (viii) except as rights to indemnity and contribution under this
          Agreement may be limited under applicable law, the execution and
          delivery by the Company of, and the performance by the Company of its
          obligations under, this Agreement, the Senior Indenture, the
          Subordinated Indenture, the Offered Securities, the Warrant Agreement
          and the Unit Agreement, if any, will not contravene any provision of
          applicable law of the United States (except with respect to laws
          relating specifically to the cable communications industry, as to
          which such counsel is not called upon to express any opinion),
          Pennsylvania, or, to the best knowledge of such counsel, of any other
          state or jurisdiction of the United States or of any foreign
          jurisdiction (in which foreign jurisdiction the Company or any
          specified subsidiary does business which is material to the Company
          and its subsidiaries, as a whole), or the articles of incorporation
          or by-laws of the Company or, to the best knowledge of such counsel,
          any agreement or other instrument binding upon the Company, and,
          except for the orders of the Commission making the Registration
          Statement effective and the Senior Indenture and the Subordinated
          Indenture qualified under the Trust Indenture Act of 1939, as amended
          (the "Trust Indenture Act") (which have been obtained) and such
          permits or similar authorizations required under the securities or
          Blue Sky laws of certain states or foreign jurisdictions (as to which
          such counsel is not called upon to express any opinion), no consent,
          approval or authorization of any governmental body or agency of the
          United States (except with respect to consents, approvals and
          authorizations relating specifically to the cable communications
          industry, as to which such counsel is not called upon to express any
          opinion), Pennsylvania, or, to the best knowledge of such counsel, of
          any other state or jurisdiction of the United States or of any
          foreign jurisdiction is required for the performance by the Company
          of its obligations under this Agreement, the Senior Indenture, the
          Subordinated Indenture, the

                                       4

<PAGE>



          Offered Securities, the Warrant Agreement and the Unit Agreement, if
          any,

               (ix) subject to such qualification as may be set forth in the
          Prospectus, the Company and its subsidiaries have, and are in
          material compliance with, such franchises, and to the best knowledge
          of such counsel after reasonable investigation, such licenses and
          authorizations, as are necessary to own their cable communications
          properties and to conduct their cable communications business in the
          manner described in the Prospectus, except where the failure to have,
          or comply with, such franchises, licenses and authorizations would
          not have a material adverse effect on the business or financial
          condition of the Company and its subsidiaries, as a whole, and such
          franchises, licenses and authorizations contain no materially
          burdensome restrictions not adequately described in the Prospectus,
          which restrictions would have a material adverse effect on the
          business or financial condition of the Company and its subsidiaries,
          as a whole,

               (x) the statements (A) in Item 3 of the Company's most recent
          Annual Report on Form 10-K incorporated by reference in the
          Prospectus, (B) in Part II, Item 1 under the caption "Legal
          Proceedings" of the Company's most recent Quarterly Report on Form
          10-Q incorporated by reference in the Prospectus and (C) in the
          Registration Statement in Item 15, insofar as such statements
          constitute a summary of the legal matters, documents or proceedings
          referred to therein, fairly present the information called for with
          respect to such legal matters, documents and proceedings,

               (xi) such counsel does not know of any legal or governmental
          proceeding pending or threatened to which the Company or any of its
          subsidiaries is a party or to which any of the properties of the
          Company or any of its subsidiaries is subject which is required to be
          described in the Registration Statement or the Prospectus and is not
          so described or of any contract or other document which is required
          to be described in the Registration Statement or the Prospectus or to
          be filed as an exhibit to the Registration Statement which is not
          described or filed as required,

               (xii) the securities into which the Offered Securities are
          convertible, initially reserved for issuance upon conversion of the
          Offered Securities (the "Underlying Securities") have been duly
          authorized and reserved for issuance, and

               (xiii) when the Underlying Securities are issued upon conversion
          of the Offered Securities in accordance with the terms of the Offered

                                       5

<PAGE>



          Securities, such Underlying Securities will be validly issued, fully
          paid and non-assessable and will not be subject to any preemptive or
          other right to subscribe for or purchase such Underlying Securities.

     Such counsel shall also state that no facts have come to his attention
that lead him to believe (1) that the Registration Statement or any amendments
thereto (except for the financial statements and other financial or statistical
data included or incorporated by reference therein or omitted therefrom and the
Form T-1, as to which such counsel is not called upon to express any belief),
on the date on which it became effective or the date of filing of the most
recent subsequent Annual Report on Form 10-K, contained an untrue statement of
a material fact or omitted to state a material fact required to be stated
therein or necessary to make the statements therein not misleading; (2) that
the Prospectus, as amended or supplemented, if applicable (except for the
financial statements and other financial or statistical data included or
incorporated by reference therein or omitted therefrom, as to which such
counsel is not called upon to express any belief), at the date of the
Underwriting Agreement or at the Closing Date, contained or contains an untrue
statement of a material fact or omitted or omits to state a material fact
necessary in order to make the statements therein, in the light of the
circumstances under which they are made, not misleading; or (3) that the
documents incorporated by reference in the Prospectus (except for the financial
statements and other financial or statistical data included or incorporated by
reference therein or omitted therefrom, as to which such counsel is not called
upon to express any belief), as of the dates they were filed with the
Commission, contained an untrue statement of a material fact or omitted to
state a material fact necessary in order to make the statements therein, in the
light of the circumstances under which they are made, not misleading.

     With respect to the preceding paragraph, such counsel may state that his
opinion and belief is based upon his participation in the preparation of the
Registration Statement, Prospectus (as amended or supplemented) and the
documents incorporated therein by reference and review and discussion of the
contents thereof, but is without independent check or verification except as
specified.

     In expressing his opinion as to questions of the law of jurisdictions
other than the Commonwealth of Pennsylvania and the United States, such counsel
may rely to the extent reasonable on such counsel as may be reasonably
acceptable to counsel to the Underwriters. In addition, such counsel may
reasonably rely as to questions of fact on certificates of responsible officers
of the Company.

          (c) The Manager shall have received on the Closing Date an opinion of
     Davis Polk & Wardwell, special counsel for the Company, dated the Closing
     Date, to the effect that:

               (i) assuming each of the Senior Indenture and the Subordinated
          Indenture have been duly authorized, executed and delivered by the

                                       6

<PAGE>



          Company and duly executed and delivered by the respective trustee
          thereto, each of the Senior Indenture and the Subordinated Indenture
          is a valid and binding agreement of the Company, enforceable against
          the Company in accordance with its terms (subject, as to enforcement
          of remedies, to applicable bankruptcy, reorganization, insolvency,
          moratorium or other similar laws affecting creditors' rights
          generally from time to time in effect and to general equity
          principles),

               (ii) assuming the Warrant Agreement, if any, has been duly
          authorized, executed and delivered by the Company and duly executed
          and delivered by the Warrant Agent, the Warrant Agreement, if any, is
          a valid and binding agreement of the Company, enforceable in
          accordance with its terms (subject, as to enforcement of remedies, to
          applicable bankruptcy, reorganization, insolvency, moratorium or
          other similar laws affecting creditors' rights generally from time to
          time in effect and to general equity principles);

               (iii) assuming the Unit Agreement, if any, has been duly
          authorized, executed and delivered by the Company and duly executed
          and delivered by the Agent, the Unit Agreement, if any, is a valid
          and binding agreement of the Company, enforceable in accordance with
          its terms (subject, as to enforcement of remedies, to applicable
          bankruptcy, reorganization, insolvency, moratorium or other similar
          laws affecting creditors' rights generally from time to time in
          effect and to general equity principles);

               (iv) assuming the Offered Securities have been authorized by the
          Company, the Offered Securities, when executed and authenticated in
          accordance with the provisions of the relevant Senior Indenture,
          Subordinated Indenture, the Warrant Agreement and the Unit Agreement,
          as the case may be, and delivered to and paid for (A) by the
          Underwriters in accordance with the terms of this Agreement, and (B)
          upon exercise of the Warrants pursuant to the Warrant Agreement, in
          the case of Warrant Securities, will be valid and binding obligations
          of the Company, enforceable against the Company in accordance with
          their terms (subject, as to enforcement of remedies, to applicable
          bankruptcy, reorganization, insolvency, moratorium or other similar
          laws affecting creditors' rights generally from time to time in
          effect and to general equity principles), and will be entitled to the
          benefits of the relevant Senior Indenture, Subordinated Indenture,
          the Warrant Agreement and the Unit Agreement, as the case may be,

               (v) each of the Senior Indenture and the Subordinated Indenture
          has been duly qualified under the Trust Indenture Act,

                                       7

<PAGE>



               (vi) except as rights to indemnity and contribution under this
          Agreement may be limited under applicable law, the execution and
          delivery by the Company of, and the performance by the Company of its
          obligations under, this Agreement, the Senior Indenture, the
          Subordinated Indenture, the Offered Securities, the Warrant Agreement
          and the Unit Agreement, if any, will not contravene any provision of
          applicable law of the United States (except with respect to laws
          relating specifically to the cable communications industry, as to
          which such counsel is not called upon to express any opinion), or New
          York and, except for the orders of the Commission making the
          Registration Statement effective and the Senior Indenture and the
          Subordinated Indenture qualified under the Trust Indenture Act (which
          have been obtained) and such permits or similar authorizations
          required under the securities or Blue Sky laws of certain states or
          foreign jurisdictions (as to which such counsel is not called upon to
          express any opinion), no consent, approval or authorization of any
          governmental body or agency of the United States (except with respect
          to consents, approvals and authorizations relating specifically to
          the cable communications industry, as to which such counsel is not
          called upon to express any opinion), or New York is required for the
          performance by the Company of its obligations under this Agreement,
          the Senior Indenture, the Subordinated Indenture, the Offered
          Securities, the Warrant Agreement and the Unit Agreement, if any, and

               (vii) the statements in the Prospectus Supplement under
          "Description of [the Offered Securities]", "Certain U.S. Tax
          Considerations" and "Underwriting" and in the Basic Prospectus under
          "Description of [the Offered Securities]", "United States Taxation"
          and "Plan of Distribution", insofar as such statements constitute a
          summary of the legal matters or documents referred to therein, fairly
          present the information called for with respect to such legal matters
          and documents.

     Such counsel shall also state that no facts have come to the attention of
such counsel that lead them to believe (1) that the Registration Statement and
the Prospectus and any supplements or amendments thereto or the documents
incorporated by reference in the Registration Statement and Prospectus (except
for financial statements and other financial or statistical data included or
incorporated by reference therein and the Form T- 1, as to which such counsel
is not called upon to express any belief) did not comply as to form in all
material respects with the Securities Act and the rules and regulations of the
Commission thereunder; (2) that the Registration Statement or any amendment
thereto (except for the financial statements and other financial or statistical
data included or incorporated by reference therein or omitted therefrom and the
Form T-1, as to which such counsel is not called upon to express any belief) at
the date of the Underwriting Agreement contained an untrue statement of a
material fact or omitted to state a material

                                       8

<PAGE>



fact required to be stated therein or necessary to make the statements therein
not misleading; or (3) that the Prospectus, as amended or supplemented, if
applicable (except for the financial statements and other financial or
statistical data included or incorporated by reference therein or omitted
therefrom, as to which such counsel is not called upon to express any belief),
at the date of the Underwriting Agreement or at the Closing Date, contained or
contains an untrue statement of a material fact or omitted or omits to state a
material fact necessary in order to make the statements therein, in the light
of the circumstances under which they are made, not misleading.

     With respect to the preceding paragraph, Davis Polk & Wardwell may state
that their opinion and belief is based upon their participation in the
preparation of the Registration Statement and Prospectus and any amendments or
supplements thereto (but not including documents incorporated therein by
reference) and review and discussion of the contents thereof (including
documents incorporated therein by reference), but is without independent check
or verification except as specified.

          (d) The Manager shall have received on the Closing Date an opinion of
     Dow, Lohnes and Albertson, PLLC special counsel for the Company, dated the
     Closing Date, to the effect that:

               (i) no approval of the Federal Communications Commission (the
          "FCC") is required in connection with the issuance and sale of the
          Offered Securities,

               (ii) the execution and delivery of this Agreement, the Senior
          Indenture, the Subordinated Indenture, the Warrant Agreement and the
          Unit Agreement, if any, by the Company, the fulfillment of the terms
          set forth herein and therein by the Company and the consummation of
          the transactions contemplated hereby and thereby by the Company do
          not violate any statute, regulation or other law of the United States
          relating specifically to the cable communications industry (except as
          otherwise explicitly set forth in the Prospectus) or, to the
          knowledge of such counsel, any order, judgment or decree of any court
          or governmental body of the United States relating specifically to
          the cable communications industry and applicable to the Company or
          any subsidiary, and which violation would have a material adverse
          effect on the business or financial condition of the Company and its
          subsidiaries, as a whole,

               (iii) the statements in the Company's most recent Annual Report
          on Form 10-K incorporated by reference in the Registration Statement
          and Prospectus [identify sections describing cable regulatory
          matters] as updated by the Company's most recent Quarterly Reports on
          Form 10-Q incorporated in the Registration Statement and Prospectus
          and as updated by the Prospectus, insofar as they are, or refer to,
          statements of federal law

                                       9

<PAGE>



          or legal conclusions, have been reviewed by such counsel and present
          in all material respects the information called for with respect to
          such statements of federal law or legal conclusions, and

               (iv) such counsel does not know of any proceeding pending before
          the FCC to which the Company or any of its subsidiaries is a party or
          involving the cable communications properties, licenses or
          authorizations of the Company and its subsidiaries, or of any cable
          communications law or regulation relevant thereto required to be
          described in the Registration Statement or Prospectus pursuant to
          Regulation S-K promulgated under the Securities Act, which is not
          described as required.

          (e) The Manager shall have received on the Closing Date an opinion of
     Cahill Gordon & Reindel (a partnership including a professional
     organization), counsel for the Underwriters, dated the Closing Date,
     covering the matters requested by and in form and substance reasonably
     satisfactory to the Manager.

          (f) The Manager shall have received on the Closing Date, a letter
     dated the Closing Date, in each case in form and substance satisfactory to
     the Manager, from Deloitte & Touche LLP, independent public accountants,
     containing statements and information of the type ordinarily included in
     accountants' "comfort letters" to underwriters with respect to the
     financial statements and certain financial information contained in or
     incorporated by reference in the Registration Statement and the
     Prospectus.

          (g) The Manager shall have received on the date hereof or on the
     Closing Date, as applicable, such additional documents as the Manager
     shall have reasonably requested to confirm compliance with the conditions
     to Closing listed herein.

     5. Covenants of the Company. In further consideration of the agreements of
the Underwriters herein contained, the Company covenants as follows:

          (a) To furnish to the Manager, without charge, a copy of the
     Registration Statement and two signed copies of any post-effective
     amendment thereto specifically relating to the Offered Securities
     (including exhibits thereto and documents incorporated therein by
     reference) and, during the period mentioned in paragraph (c) below, as
     many copies of the Prospectus, any documents incorporated therein by
     reference and any supplements and amendments thereto as the Manager may
     reasonably request.


                                       10

<PAGE>



          (b) Before amending or supplementing the Registration Statement or
     the Prospectus, to furnish the Manager a copy of each such proposed
     amendment or supplement.

          (c) If, during such period after the first date of the public
     offering of the Offered Securities during which in the opinion of counsel
     to the Manager the Prospectus is required by law to be delivered in
     connection with sales by an Underwriter or dealer, any event shall occur
     as a result of which it is necessary to amend or supplement the Prospectus
     in order to make the statements therein, in the light of the circumstances
     existing at the time, not misleading, forthwith to prepare and furnish, at
     its expense, to the Underwriters and to the dealers (whose names and
     addresses the Manager will furnish to the Company) to which Offered
     Securities may have been sold by the Manager on behalf of the Underwriters
     and to any other dealers on request, either amendments or supplements to
     the Prospectus so that the statements in the Prospectus as so amended or
     supplemented will not, in the light of the circumstances existing at the
     time, be misleading.

          (d) To endeavor to qualify the Offered Securities for offer and sale
     under the securities or Blue Sky laws of such U.S. jurisdictions as the
     Manager shall reasonably request.

          (e) To make generally available to the Company's security holders as
     soon as practicable an earnings statement covering the twelve month period
     beginning on the first day of the first fiscal quarter commencing after
     the date hereof, which shall satisfy the provisions of Section 11(a) of
     the Securities Act and the rules and regulations of the Commission
     thereunder (which may be accomplished by making generally available the
     Company's financial statements in the manner provided for by Rule 158 of
     the Securities Act).

          (f) To comply with all provisions of Section 517.075, Florida
     Statutes (Chapter 92-198, Laws of Florida) relating to doing business with
     Cuba.

     6. Indemnification and Contribution. The Company agrees to indemnify and
hold harmless each Underwriter and each person, if any, who controls each
Underwriter within the meaning of either Section 15 of the Securities Act or
Section 20 of the Exchange Act from and against any and all losses, claims,
damages and liabilities caused by any untrue statement or alleged untrue
statement of a material fact contained in the Registration Statement or the
Prospectus (as amended or supplemented) or any preliminary prospectus, or
caused by any omission or alleged omission to state therein a material fact
necessary to make the statements therein not misleading, except insofar as such
losses, claims, damages or liabilities are caused by any such untrue statement
or omission or alleged untrue statement or omission based upon information
furnished to the Company in writing by such Underwriter through the Manager
expressly for use therein;

                                       11

<PAGE>



provided, however, that the foregoing indemnity agreement with respect to any
preliminary prospectus shall not inure to the benefit of any Underwriter from
whom the person asserting any such losses, claims, damages or liabilities
purchased Offered Securities, or any person controlling any such Underwriter,
if a copy of the Prospectus (as then amended or supplemented) was not sent or
given by or on behalf of such Underwriter to such person, if required by law so
to have been delivered, at or prior to the written confirmation of the sale of
the Offered Securities to such person, and if the Prospectus (as so amended or
supplemented but without reference to documents incorporated by reference
therein) would have cured the defect giving rise to such loss, claim, damage or
liability.

     Each Underwriter agrees to indemnify and hold harmless the Company, its
directors, its officers who sign the Registration Statement and each person, if
any, who controls the Company within the meaning of either Section 15 of the
Securities Act or Section 20 of the Exchange Act to the same extent as the
foregoing indemnity from the Company to such Underwriter, but only with
reference to information relating to such Underwriter furnished to the Company
in writing by such Underwriter through the Manager expressly for use in the
Registration Statement, the Prospectus, any amendment or supplement thereto, or
any preliminary prospectus.

     In case any proceeding (including any governmental investigation) shall be
instituted involving any person in respect of which indemnity may be sought
pursuant to either of the two preceding paragraphs, such person (hereinafter
called the "indemnified party") shall promptly notify the person against whom
such indemnity may be sought (hereinafter called the "indemnifying party") in
writing and the indemnifying party, upon request of the indemnified party,
shall retain counsel reasonably satisfactory to the indemnified party to
represent the indemnified party and any others the indemnifying party may
designate in such proceeding and shall pay the fees and disbursements of such
counsel related to such proceeding. In any such proceeding, any indemnified
party shall have the right to retain its own counsel, but the fees and expenses
of such counsel shall be at the expense of such indemnified party unless (i)
the indemnifying party and the indemnified party shall have mutually agreed to
the retention of such counsel or (ii) the named parties to any such proceeding
(including any impleaded parties) include both the indemnifying party and the
indemnified party and representation of both parties by the same counsel would
be inappropriate due to actual or potential differing interests between them.
It is understood that the indemnifying party shall not, in connection with any
proceeding or related proceedings in the same jurisdiction, be liable for the
reasonable fees and expenses of more than one separate firm (in addition to any
local counsel) for all such indemnified parties and that all such fees and
expenses shall be reimbursed as they are incurred. In the case of any such
separate firm for the Underwriters and such control persons of the
Underwriters, such firm shall be designated in writing by the Manager. In the
case of any such separate firm for the Company and such directors, officers and
controlling persons of the Company, such firm shall be designated in writing by
the Company. The indemnifying party shall not be liable for any settlement of
any

                                       12

<PAGE>



proceeding effected without its written consent, but if settled with such
consent or if there be a final judgment for the plaintiff, the indemnifying
party agrees to indemnify, to the extent provided in the two immediately
preceding paragraphs, the indemnified party from and against any loss or
liability by reason of such settlement or judgment. No indemnifying party
shall, without the prior written consent of the indemnified party, effect any
settlement of any pending or threatened proceeding in respect of which any
indemnified party is or could have been a party and indemnity could have been
sought hereunder by such indemnified party, unless such settlement includes an
unconditional release of such indemnified party from all liability on claims
that are the subject matter of such proceeding.

     If the indemnification provided for in the second or third paragraph of
this Section 6 is unavailable to an indemnified party in respect of any losses,
claims, damages or liabilities for which indemnification is provided herein,
then the indemnifying party, in lieu of indemnifying such indemnified party,
shall contribute to the amount paid or payable by such indemnified party as a
result of such losses, claims, damages or liabilities (i) in such proportion as
is appropriate to reflect the relative benefits received by the Company and the
Underwriters from the offering of the Offered Securities or (ii) if the
allocation provided by clause (i) above is not permitted by applicable law, in
such proportion as is appropriate to reflect not only the relative benefits
referred to in clause (i) above but also the relative fault of the Company and
of the Underwriters in connection with the statements or omissions which
resulted in such losses, claims, damages or liabilities, as well as any other
relevant equitable considerations. The relative benefits received by the
Company and the Underwriters shall be deemed to be in the same respective
proportions as the net proceeds from the offering (before deducting expenses)
received by the Company bear to the total underwriting discounts and
commissions received by the Underwriters in respect thereof. The relative fault
of the Company and the Underwriters shall be determined by reference to, among
other things, whether the untrue or alleged untrue statement of a material fact
or the omission or alleged omission to state a material fact relates to
information supplied by the Company or by the Underwriters and the parties'
relative intent, knowledge, access to information and opportunity to correct or
prevent such statement or omission.

     The Company and the Underwriters agree that it would not be just and
equitable if contribution pursuant to this Section 6 were determined by pro
rata allocation (even if the Underwriters were treated as one entity for such
purpose) or by any other method of allocation which does not take account of
the equitable considerations referred to in the immediately preceding
paragraph. The amount paid or payable by an indemnified party as a result of
the losses, claims, damages and liabilities referred to in the immediately
preceding paragraph shall be deemed to include, subject to the limitations set
forth above, any legal or other expenses reasonably incurred by such
indemnified party in connection with investigating or defending any such action
or claim. Notwithstanding the provisions of this Section 6, the Underwriters
shall not be required to contribute any amount in excess of the amount by which
the total price at which the Offered Securities

                                       13

<PAGE>



underwritten by it and distributed to the public were offered to the public
exceeds the amount of any damages which the Underwriters have otherwise been
required to pay by reason of such untrue or alleged untrue statement or
omission or alleged omission. No person guilty of fraudulent misrepresentation
(within the meaning of Section 11(f) of the Securities Act) shall be entitled
to contribution from any person who was not guilty of such fraudulent
misrepresentation.

     The indemnity and contribution agreement contained in this Section 6 and
the representations and warranties of the Company contained in this Agreement
shall remain operative and in full force and effect regardless of (i) any
termination of this Agreement, (ii) any investigation made by or on behalf of
the Underwriters or any person controlling the Underwriters or by or on behalf
of the Company, its officers or directors or any other person controlling the
Company and (iii) acceptance of and payment for any of the Offered Securities.

     7. Termination. This Agreement shall be subject to termination in the
absolute discretion of the Manager by notice given by the Manager to the
Company, if (a) after the execution and delivery of the Underwriting Agreement
and prior to the Closing Date (i) trading generally shall have been suspended
or materially limited on or by, as the case may be, the New York Stock
Exchange, the American Stock Exchange, or the National Association of
Securities Dealers, Inc., (ii) trading of any securities of the Company shall
have been suspended on the Nasdaq National Market, (iii) a general moratorium
on commercial banking activities in New York shall have been declared by either
Federal or New York State authorities, or (iv) there shall have occurred any
outbreak or escalation of hostilities or any change in financial markets or any
calamity or crisis that, in the judgment of the Manager, is material and
adverse and (b) in the case of any of the events specified in clauses (a)(i)
through (iv), such event, singly or together with any other such event, makes
it, in the judgment of the Manager, impracticable to market the Offered
Securities on the terms and in the manner contemplated in the Prospectus.

     The Company will pay and bear all costs and expenses incident to the
performance of its obligations under this Agreement, including (a) the
preparation, printing and filing of the Registration Statement (including
financial statements and exhibits), as originally filed and as amended, the
preliminary prospectuses and the Prospectus and any amendments or supplements
thereto, and the cost of furnishing copies thereto to the Underwriters, (b) the
preparation, printing and distribution of this Agreement, the Senior Indenture,
the Subordinated Indenture, the Warrant Agreement and the Unit Agreement, if
any, and Blue Sky Memorandum, (c) the delivery of the Offered Securities to the
Underwriters, (d) the reasonable fees and disbursements of the Company's
counsel and accountants, (e) the qualification of the Offered Securities under
the applicable state securities or Blue Sky laws in accordance with Section 5,
including filing fees and reasonable fees and disbursements of counsel for the
Underwriters in connection therewith and in connection with any Blue Sky survey
and any legal investment survey, (f) all fees payable to the National
Association of Securities Dealers,

                                       14

<PAGE>



Inc. in connection with the review, if any, of the offering of the Securities,
(g) any fees charged by rating agencies for rating the Offered Securities and
(h) the fees and expenses of the Trustee, including the fees and disbursements
of counsel for the Trustee, in connection with the Senior Indenture, the
Subordinated Indenture and the Offered Securities. Except as specifically
provided elsewhere herein, the Underwriters will pay all of their own costs and
expenses, including without limitation the fees and expenses of their counsel
and the expenses of selling presentations.

     If this Agreement shall be terminated by the Underwriters because of any
failure or refusal on the part of the Company to comply with the terms or to
fulfill any of the conditions of this Agreement, or if for any reason the
Company shall be unable to perform its obligations under this Agreement, the
Company will reimburse the Underwriters for all out-of-pocket expenses
(including the fees and disbursements of their counsel) reasonably incurred by
the Underwriters in connection with this Agreement or the offering contemplated
hereunder. This provision shall survive the termination or cancellation of this
Agreement.

     8. Defaulting Underwriters. If on the Closing Date any one or more of the
Underwriters shall fail or refuse to purchase Offered Securities that it has or
they have agreed to purchase on such date, and the aggregate amount of Offered
Securities which such defaulting Underwriter or Underwriters agreed but failed
or refused to purchase is not more than one-tenth of the aggregate amount of
the Offered Securities to be purchased on such date, the other Underwriters
shall be obligated severally in the proportions that the amount of Offered
Securities set forth opposite their respective names bears to the aggregate
amount of Offered Securities set forth opposite the names of all such
non-defaulting Underwriters, or in such other proportions as the Manager may
specify, to purchase the Offered Securities which such defaulting Underwriter
or Underwriters agreed but failed or refused to purchase on such date; provided
that in no event shall the amount of Offered Securities that any Underwriter
has agreed to purchase pursuant to this Agreement be increased pursuant to this
Section 8 by an amount in excess of one-ninth of such amount of Offered
Securities without the written consent of such Underwriter. If on the Closing
Date any Underwriter or Underwriters shall fail or refuse to purchase Offered
Securities and the aggregate amount of Offered Securities with respect to which
such default occurs is more than one-tenth of the aggregate amount of Offered
Securities to be purchased on such date, and arrangements satisfactory to the
Manager and the Company for the purchase of such Offered Securities are not
made within 36 hours after such default, this Agreement shall terminate without
liability on the part of any non-defaulting Underwriter or the Company. In any
such case either the Manager or the Company shall have the right to postpone
the Closing Date but in no event for longer than seven days, in order that the
required changes, if any, in the Registration Statement and in the Prospectus
or in any other documents or arrangements may be effected. Any action taken
under this paragraph shall not relieve any defaulting Underwriter from
liability in respect of any default of such Underwriter under this Agreement.

                                       15

<PAGE>



     9. Counterparts. The Underwriting Agreement may be signed in any number of
counterparts, each of which shall be an original, with the same effect as if
the signatures thereto and hereto were upon the same instrument.

     10. Applicable Law. This Agreement shall be governed by and construed in
accordance with the internal laws of the State of New York.

     11. Headings. The headings of the sections of this Agreement have been
inserted for convenience of reference only and shall not be deemed a part of
this Agreement.



                                       16


                                                                      EXHIBIT 4

Certificate Number R-_

Number of ZONES represented hereby: ____________
(representing $___________ in aggregate original principal amount)

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

Unless and until it is exchanged in whole or in part for securities in
definitive registered form, this certificate may not be transferred except as a
whole by DTC to a nominee of DTC or by a nominee of DTC to DTC or another
nominee of DTC or by DTC or any such nominee to a successor Depository or a
nominee of such successor Depository.


                              COMCAST CORPORATION


                               2.0% EXCHANGEABLE
                    SUBORDINATED DEBENTURE DUE NOVEMBER 2029
                                (each a "ZONES")

                                                              CUSIP 200300606

     COMCAST CORPORATION, a corporation duly organized and existing under the
laws of the Commonwealth of Pennsylvania (herein called the "Company", which
term includes any successor corporation under the Indenture hereinafter
referred to), for value received, hereby promises to pay to

     Cede & Co. or its registered assigns,

     the Maturity Amount

in any coin or currency of the United States of America which, at the time of
payment is legal tender for public and private debts, upon presentation and
surrender of this Debenture, on the 15th day of November, 2029, at the office
or agency of the Company in New York, New York, and to pay interest on the
original principal amount at the Interest Rate, in like coin or currency, from
the original date of issuance of this Debenture or from the most recent
February 15, May 15, August 15 or November 15 to which interest has been paid
or duly provided for, quarterly in arrears on the 15th day of February, May,
August and November of each year, commencing February 15, 2000, until payment
of said Maturity Amount, or if earlier redeemed, the Redemption Amount, has
been in either case made or duly provided for. For purposes of this Debenture,
the "Interest Rate" means a rate of 2.0% per annum plus the amount of the
Reference Shares Dividend Amount. Additional Interest will be distributed as
specified on the reverse hereof. Changes in the Contingent Principal Amount
will not affect the Interest Rate. Interest may be deferred, at the election of
the Company as specified on the reverse hereof. Any such interest payable on
any February 15, May 15, August 15 or November 15 shall (subject to exceptions
provided in the Indenture referred to on the reverse hereof) be paid to the
person in whose name this Debenture or the Debentures in exchange or
substitution for which this Debenture shall have been issued, shall have been
registered at the close of business on February 1, May 1, August 1 or November
1, as


<PAGE>



the case may be next preceding such February 15, May 15, August 15 or November
15 whether or not such February 1, May 1, August 1 or November 1 is a Business
Day. Capitalized terms used on the face hereof without definition have the
meaning specified on the reverse hereof.

     THE PROVISIONS OF THIS DEBENTURE ARE CONTINUED ON THE REVERSE HEREOF AND
SUCH CONTINUED PROVISIONS SHALL FOR ALL PURPOSES HAVE THE SAME EFFECT AS THOUGH
FULLY SET FORTH AT THIS PLACE.

     This Debenture shall not be entitled to any benefit under the Indenture
referred to on the reverse hereof or any indenture supplemental thereto, or
become valid or obligatory for any purpose until the Trustee under said
Indenture, or a successor trustee thereunder, shall have signed the form of
certificate of authentication appearing hereon.


                              *     *     *
- -------

<PAGE>



     IN WITNESS WHEREOF, COMCAST CORPORATION has caused this instrument to be
duly executed under its corporate seal.

Dated:

         TRUSTEE'S CERTIFICATE OF AUTHENTICATION

This is one of the Debentures of the series referred to on the reverse hereof.

Bankers Trust Company,
as Trustee,


By:
   ------------------------------------
   Authorized Officer

                              COMCAST CORPORATION


                              By:
                                 ----------------------------------------------
                                 Title:

                              Attest:
                                     ------------------------------------------
                                     Title:


<PAGE>



                            [Reverse of Debentures]

                               2.0% EXCHANGEABLE
                    SUBORDINATED DEBENTURE DUE NOVEMBER 2029

     General

     This Debenture is one of a duly authorized issue of debentures, notes,
bonds or other evidences of indebtedness of the Company (herein called the
"Securities") of the series hereinafter specified, all issued or to be issued
under an indenture dated as of June 15, 1999 (herein called the "Indenture")
executed between the Company and Bankers Trust Company, a New York banking
corporation with its principal offices in New York, New York (hereinafter
called the "Trustee"), to which indenture and all supplemental indentures
reference is hereby made for a specification of the rights and limitations of
rights thereunder of the registered holders of the Debentures, the rights and
obligations thereunder of the Company and the rights, duties and immunities
thereunder of the Trustee and the terms upon which the Debentures are, and are
to be, authenticated and delivered. The terms of the Indenture are hereby
incorporated by reference herein. The Securities may be issued in one or more
series, which different series may be issued in various aggregate principal
amounts, may mature at different times, may bear interest (if any) at different
rates, may be subject to different redemption or repayment provisions (if any),
may be subject to different sinking, purchase or analogous funds (if any) and
may otherwise vary as provided in the Indenture. This Debenture is one of a
series designated as 2.0% Exchangeable Subordinated Debentures due November
2029 (hereinafter called the "ZONES") of the Company, each ZONES representing
$81.6325 in original principal amount, limited in aggregate number to 7,000,000
(or $571,427,500 in aggregate original principal amount) or 8,050,000 (or
$657,141,625 in aggregate original principal amount if the underwriter's
over-allotment option is exercised in full).

     The Debentures will be unsecured, subordinated obligations of the Company.
The indebtedness evidenced by the Debentures is, to the extent provided in the
Indenture, subordinate and subject in right and payment to the prior payment in
full of all Senior Indebtedness as defined in the Indenture, and each holder of
this Debenture, by accepting the same, agrees to and shall be bound by the
provisions of the Indenture.

     The Maturity Amount, the Redemption Amount, Additional Interest, if any,
and interest on the ZONES will be payable at the office or agency the Company
maintains for such purpose within The City and State of New York or, at the
Company's option, payment of cash interest may be made by check mailed to the
holders of the ZONES at their respective addresses set forth in the register of
holders of ZONES; provided that all cash payments with respect to ZONES to a
holder of a minimum of 100,000 ZONES who has given written wire transfer
instructions, on or prior to the relevant record date, to the paying agent,
will be made by wire transfer of immediately available funds to the accounts
specified by such holders. Until otherwise designated by the Company, the
Company's office or agency in New York will be the office of the Trustee
maintained for such purpose. The ZONES will be issued in denominations of one
ZONES and integral multiples thereof.

     Interest and Additional Interest

     The Company shall pay interest to the holder of this Debenture in such
amounts and at such times as specified on the face of this Debenture. At least
five (5) Business Days prior to each Interest Payment Date the Company shall
deliver an Officers' Certificate to the Trustee setting forth: (i) the amount
of interest per ZONES due for that interest period, (ii) the applicable
Reference Shares Dividend Amount and (iii) the total payment due for that
period on all ZONES outstanding. "Reference Shares Dividend Amount" means, in
respect of any quarterly interest

                                      R-1

<PAGE>



period, an amount per ZONES equal to the amount of all quarterly cash dividends
paid on the Reference Shares attributable to a ZONES.

     In addition, the Company shall also distribute, as additional interest on
each ZONES ("Additional Interest"), a proportionate amount of any property,
including cash (other than the Reference Shares Dividend Amount), distributed
on or with respect to the Reference Shares attributable to each ZONES (other
than publicly traded equity securities). If any property that is not publicly
traded is distributed on the Reference Shares, the Company will pay each holder
of ZONES the proportionate amount the fair market value of that property as
determined in good faith by the Board of Directors of the Company (as defined
in the Indenture). The Company will distribute Additional Interest on the 20th
Business Day after such property is distributed on the Reference Shares to
holders of the ZONES on the tenth Business Day after the date of distribution.
Each ZONES shall initially be entitled to dividends and distributions on or
with respect to one Reference Share as of the original date of issuance of the
ZONES, subject to adjustment as provided herein.

     At least five (5) Business Days prior to any distribution of Additional
Interest on the ZONES, the Company shall deliver an Officers Certificate to the
Trustee setting forth: (i) the exact amount of property to be distributed on or
with respect to the Reference Shares per ZONES and (ii) the total amount of
property to be distributed on or with respect to the Reference Shares for all
outstanding ZONES at the date of such distribution. If any distribution is made
of any property that is not publicly traded, then at least five (5) Business
Days prior to such distribution, the Company shall deliver to the Trustee: (i)
a certified copy of the resolution of the Board of Directors establishing the
fair market value of the property and setting a special record date for such
distribution, (ii) an Officers' Certificate setting forth the exact amount of
property to be distributed on the Reference Shares per ZONES and (iii) the
total amount of property that is not publicly traded to be distributed on the
Reference Shares for all outstanding ZONES. In each case described above, the
Company will state whether it will distribute such Additional Interest in
property or cash. The Trustee is only responsible for distributing property in
the form of global book entry securities which are DTC eligible. The Company is
responsible for acting as its own paying agent to make all other distributions
of property. The Company will prepare a press release relating to any such
distribution to be provided to DTC for dissemination through the DTC broadcast
facility.

     If interest is payable on a date that is not a Business Day (as defined at
the end of this paragraph), payment will be made on the next Business Day (and
without any interest or other payment in respect of such delay). However, if
the next Business Day is in the next calendar year, payment of interest will be
made on the preceding Business Day. A "Business Day" means each day except
Saturday, Sunday and any day on which banking institutions in The City of New
York are authorized or required by law to close.

     Interest will be computed on the basis of a 360-day year consisting of
twelve 30-day months. The Company will pay interest on any overdue Maturity
Amount at 10.25% per annum, compounded quarterly, and it shall pay interest on
overdue installments of interest and the fair market value of Additional
Interest (without regard to any applicable grace period) at the same rate
compounded quarterly.

                                      R-2

<PAGE>



     Deferral of Interest Payments

     If no Event of Default (as defined in the Indenture) has occurred and is
continuing under the ZONES, the Company may, at any time and from time to time,
defer quarterly interest payments on the Debentures for up to 20 consecutive
quarterly periods; provided that a deferral of interest payments may not extend
beyond the maturity date of the ZONES. The Company may not defer distributions
of Additional Interest. If the Company defers quarterly payments of interest,
the Contingent Principal Amount (as defined below) of the ZONES shall be
increased by the amount of the deferral and the Early Exchange Ratio (as
defined below) will increase to 100% from the date of the deferral. After the
Company makes all accrued interest payments on the ZONES, with accrued interest
at an annual rate of 2.0% compounded quarterly, the Contingent Principal Amount
shall be reduced by the amount of the deferral, the Early Exchange Ratio shall
decrease to 95%, and the Company may thereafter again postpone interest
payments as described above. During any deferral period, so long as the Current
Market Value of the Reference Shares attributable to the ZONES exceeds the
original principal amount of the ZONES, the Company may at its option, but is
not obligated to, increase the amount of Reference Shares attributable to each
ZONES by an annual rate of 2.0% compounded quarterly. If the Company elects to
make this increase in an interest payment period, the holder shall have no
right to claim accrued interest in that period and the Company shall be deemed
current on that quarterly payment of interest and shall not increase the
Contingent Principal Amount, provided that the Early Exchange Ratio shall
remain at 100% only for the five Business Days immediately following the
scheduled quarterly Interest Payment Date related to the deferral. After that
five day period, the Early Exchange Ratio shall decrease to 95%. The Company
shall give the Trustee notice if the Company decides to defer interest payments
on the ZONES as described below and will prepare a press release to be provided
to DTC for dissemination through the DTC broadcast facility. The Company shall
give that notice one Business Day before the earlier of (i) the record date for
the next date interest on the ZONES is payable; or (ii) the date the Company is
required to give notice to the NYSE (or any other applicable self-regulatory
organization) or to holders of the ZONES of the record date or the date any
distribution is payable.

     The notice described above shall be in the form of an Officers'
Certificate to the Trustee setting forth: (i) the period with respect to which
it is electing to defer payment of interest, (ii) the exact amount of increase
of Contingent Principal Amount per ZONES, (iii) the total amount of increase of
Contingent Principal Amount for all outstanding ZONES, (iv) a statement that
the Early Exchange Ratio will increase to 100% prospectively from that date and
(v) that no Event of Default (as defined in the Indenture) has occurred and is
continuing under the ZONES. The Company is required to deliver such an
Officers' Certificate for each interest payment deferred.

     If and when the Company pays all of its deferred interest and accrued
interest, it must deliver to the Trustee an Officers' Certificate setting forth
the calculation of accrued interest owed per ZONES and the total amount owed on
all outstanding ZONES.

     If the Company elects to increase the amount of Reference Shares payable
for each ZONES as provided for above in lieu of paying accrued interest for
that quarter, it shall deliver an Officers' Certificate to the Trustee setting
forth: (i) the amount of such increase and the total amount, after such
increase, of Reference Shares applicable to each ZONES and (ii) the total
amount of Reference Shares applicable to all outstanding ZONES.

                                      R-3

<PAGE>



     Principal Amount

     The original principal amount per ZONES is equal to $81.6325. The minimum
amount payable upon redemption or maturity of a ZONES (the "Contingent
Principal Amount") shall initially be equal to the original principal amount.
If an Extraordinary Dividend (as defined below) is paid on the Reference
Shares, the Contingent Principal Amount for a ZONES shall be reduced on a
quarterly basis to the extent necessary so that the yield to the date of
computation (including all quarterly interest payments other than those
attributable to regular periodic cash dividends) does not exceed 2.0%. In no
event will the Contingent Principal Amount be less than zero.

     An "Extraordinary Dividend" means a dividend or distribution consisting of
cash or any other property (other than additional Reference Shares), except for
regular periodic cash dividends.

     At maturity a holder will be entitled to receive for each ZONES the
Maturity Amount. The "Maturity Amount" means the higher of (a) the Contingent
Principal Amount per ZONES and (b) the sum of the Current Market Value of the
Reference Shares attributable to a ZONES on the maturity date plus any unpaid
quarterly payments of interest due per ZONES, plus, in either case, the Final
Period Distribution attributable to one ZONES.

     "Final Period Distribution" means, in respect of (a) the maturity date, a
distribution determined in accordance with clauses (2), (3) and (4) below and
(b) a redemption date, a distribution determined in accordance with clauses
(1), (2), (3) and (4) below. In the case of a redemption date in connection
with a Rollover Offering, the distribution determined in accordance with clause
(4) shall be all dividends and distributions on or in respect of the Reference
Shares which a holder of Reference Shares on the Pricing Date would be entitled
to receive.

     (1) Unless (a) the scheduled redemption date of the ZONES is also a
         scheduled quarterly Interest Payment Date or (b) quarterly interest
         has been deferred for the then current quarterly dividend period, an
         amount equal to an annual rate of 2.0% on the original principal
         amount of the ZONES from the most recent scheduled Interest Payment
         Date to the date of redemption, plus

     (2) all dividends and distributions on or in respect of the Reference
         Shares declared by the applicable Reference Company and for which the
         ex- date falls during the period from the date of original issuance of
         the ZONES to the most recent scheduled Interest Payment Date and which
         have not been distributed to holders of Reference Shares prior to the
         most recent scheduled Interest Payment Date, plus

     (3) all dividends and distributions on or in respect of the reference
         shares which a holder of reference shares during the period from the
         most recent scheduled quarterly Interest Payment Date to the date
         immediately preceding the first Trading Day of the Averaging Period is
         entitled to receive, plus

     (4) a distribution equal to the sum of, for each successive day in the
         Averaging Period that is anticipated on the first day of the Averaging
         Period to be a Trading Day, the amounts determined in accordance with
         the following formula:

                  E x (1 - 0.05n)

         where:

                                      R-4

<PAGE>



                  E =      all dividends and distributions on or in respect
                           of the Reference Shares which a holder of Reference
                           Shares on the applicable day would be entitled to
                           receive, provided that an ex- date that occurs on a
                           day that is not a scheduled Trading Day shall be
                           deemed to have occurred on the next preceding
                           scheduled Trading Day; and

                  n =      the number of scheduled trading days that have
                           elapsed in the Averaging Period with the first
                           Trading Day of the Averaging Period being counted as
                           zero,

     A holder of ZONES is only entitled to receive distributions determined in
accordance with clauses (2), (3) or (4) to the extent actually distributed by
the Reference Company. Cash amounts paid by a Reference Company on Reference
Shares as described in clauses (2), (3) or (4) before the redemption date or
the maturity date, as the case may be, shall be paid on the redemption date or
the maturity date, as the case may be. All other property distributed, or the
cash value of the property, shall be distributed within 20 business days after
it is distributed on the Reference Shares.

     Upon maturity of the ZONES the Company shall deliver to the Trustee an
Officers' Certificate informing the Trustee of the applicable Maturity Amount
per ZONES and in the aggregate for all outstanding ZONES and its calculation
thereof and directing the Trustee to adjust its records and to request DTC to
adjust its records.

     Exchange Option

     Holders of the ZONES may at any time exchange a ZONES for an amount of
cash equal to 95% (the "Early Exchange Ratio") of the Exchange Market Value of
the Reference Shares attributable to one ZONES. The Company will pay a holder
the amount due upon exchange as soon as reasonably practicable after a holder
delivers an exchange notice to the Trustee, but in no event earlier than three
Trading Days after the date of such notice or later than ten Trading Days after
the date of such notice.

     "Exchange Market Value" means the Closing Price on the Trading Day
following the date a holder of ZONES delivers an exchange notice to the
Trustee, unless more than 500,000 ZONES have been delivered for exchange on
such date. If more than 500,000 ZONES have been delivered for exchange, then
the Exchange Market Value shall be the average Closing Price on the five
Trading Days following such date. If more than 500,000 ZONES are delivered for
exchange on any one day, the Company shall give notice of that fact by issuing
a press release prior to 9:00 a.m. New York City time on the next Trading Day,
by providing notice to DTC for dissemination through the DTC broadcast facility
and by providing notice to the Trustee. The Company's failure to provide these
notices, however, will not affect the determination of Exchange Market Value as
described above.

     If the ZONES are held through DTC, a holder of ZONES may exercise such
right through the relevant direct participant in DTC through the DTC ATOP
system by delivering an agent's message and delivering the holder's ZONES to
the Trustee's DTC participant account. If the ZONES are held in certificated
form, a holder may exercise such right of exchange as follows: the holder shall
(i) complete and manually sign an exchange notice in the form available from
the Trustee and deliver such notice to the Trustee at the office maintained by
the Trustee for such purpose, (ii) surrender the Debentures to the Trustee,
(iii) if required, furnish appropriate endorsements and transfer documents, and
(iv) if required, pay all transfer or similar taxes.

                                      R-5

<PAGE>



     By 12:00 noon New York City time on each Business Day following receipt by
the Trustee of notification from DTC that they have received an agent's message
from a DTC participant electing to exercise their Exchange Option with respect
to their ZONES and delivery of such ZONES into the Trustee's DTC participant
account or following receipt of a complete manually signed exchange notice and
receipt of Debentures from a holder, the Trustee shall notify the Company of
the amount of ZONES which were tendered. The Company shall deliver an Officers'
Certificate to the Trustee setting forth the exact amount to be paid to the
tendering holder and shall deposit such amount with the Trustee. Upon receipt
of such payment from the Company, the Trustee shall pay DTC, as soon as
practicable or in the case of ZONES that are held in certificated form, as
directed by the tendering holder.

     Pursuant to the Indenture, the date on which all of the foregoing
requirements have been satisfied is the redemption date with respect to the
Debentures delivered for exchange.

     Redemption

     The Company may redeem the Debentures in whole but not in part at a
redemption price per ZONES (the "Redemption Amount") equal to the sum of (a)
the higher of the Contingent Principal Amount per ZONES or the sum of the
Current Market Value of the Reference Shares attributable to a ZONES plus any
deferred quarterly payments of interest, plus, in either case, the Final Period
Distribution and (b) $3.6735 if the Company redeems the ZONES prior to November
15, 2000, $2.4490 if the Company redeems the ZONES prior to November 15, 2001,
$1.2245 if the Company redeems the ZONES prior to November 15, 2002, or zero if
the Company redeems the ZONES any time on or after November 15, 2002.

     The "Current Market Value" (other than in the case of a Rollover Offering,
as defined below) is defined as the average Closing Price per Reference Share
on the twenty Trading Days (the "Averaging Period") immediately prior to (but
not including) the fifth Business Day preceding the redemption date; provided,
however, that for purposes of determining the payment required upon a
redemption in connection with a Rollover Offering, "Current Market Value" means
the Closing Price per Reference Share on the Trading Day immediately preceding
the date that the Rollover Offering is priced (the "Pricing Date") or, if the
Rollover Offering is priced after 4:00 p.m., New York City Time, on the Pricing
Date, the Closing Price per share on the Pricing Date, except that if there is
not a Trading Day immediately preceding the Pricing Date or (where pricing
occurs after 4:00 p.m., New York City Time, on the Pricing Date) if the Pricing
Date is not a Trading Day, "Current Market Value" means the market value per
Reference Share as of the redemption date as determined by a nationally
recognized independent investment banking firm retained by the Company.
"Rollover Offering" means an offering or refinancing of the ZONES or sale of
the Reference Shares effected not earlier than November 15, 2002 by means of a
completed public offering or offerings (which may include one or more exchange
offers) by the Company. The Trustee will notify holders of any election to
redeem such holder's ZONES in connection with a Rollover Offering not less than
30 Business Days nor more than 60 Business Days prior to the redemption date.

     The "Closing Price" of any security on any date of determination means the
closing sale price (or, if no Closing Price is reported, the last reported sale
price) of such security (regular way) on the NYSE on such date or, if such
security is not listed for trading on the NYSE on any such date, as reported in
the composite transactions for the principal United States securities exchange
on which such security is so listed, or if such security is not so listed on a
United States national or regional securities exchange, as reported by the
Nasdaq National Market, or if such security is not so reported, the last quoted
bid price for such security in the over-the-counter market as reported by the
National Quotation Bureau or similar organization. In the event that no such
quotation is available for any day, the Board of Directors shall be entitled to
determine the

                                      R-6

<PAGE>



Closing Price on the basis of such quotations as it considers appropriate. To
the extent that trading of Reference Shares regular way continues past 4:00
p.m., New York City time, "Closing Price" shall be deemed to refer to the price
at the time that is then customary for determining the Trading Day's index
levels for stocks traded on the primary national securities exchange or
automated quotation system on which the Reference Shares are then traded or
quoted. All references to 4:00 p.m., New York City time, in the definition of
"Current Market Value" shall thereafter be deemed to refer to the then
customary determination time.

     A "Trading Day" is defined as a day on which the security, the Closing
Price of which is being determined, (a) is not suspended from trading on any
national or regional securities exchange or association or over-the-counter
market at the close of business and (b) has traded at least once on the
national or regional securities exchange or association or over-the-counter
market that is the primary market for the trading of such security.

     In addition, if at any time on or prior to January 30, 2000, a "Tax Event"
(as defined below) shall occur and be continuing, the Company shall have the
right exercisable within 180 days after such "Tax Event", upon not less than 15
Business Days notice, to redeem the ZONES, in whole, at a redemption price
equal to the higher of the Contingent Principal Amount of the ZONES or the sum
of the Current Market Value of the Reference Shares, determined by reference to
an Averaging Period of 5 rather than 20 Trading Days, plus, in either case, the
Final Period Distribution (computed by accounting for the 5-day Averaging
Period) plus any deferred quarterly payments of interest. For purposes of the
definition of "Final Period Distribution", the formula in clause (4) thereof
shall be as follows: E x (1 - 0.2n).

     A "Tax Event" means that the Trustee shall have received an opinion of
nationally recognized independent tax counsel experienced in such matters to
the effect that as a result of (a) any amendment to, clarification of, or
change (including any announced prospective change) in the laws, or any
regulations thereunder, of the United States or any political subdivision or
taxing authority thereof or therein, or (b) any judicial decision, official
administrative pronouncement, ruling, regulatory procedure, notice or
announcement, including any notice or announcement of intent to adopt such
procedures or regulations, in each case, on or after the date of the Prospectus
Supplement (a "Change in Tax Law"), there is the creation by such Change in Tax
Law of a substantial risk that, as a result of entrance into the ZONES, the
Company will be treated for purposes of Section 1259 of the Internal Revenue
Code as having constructively sold some or all of its Sprint Corporation PCS
common stock.

     In case of any redemption, the Company shall give 33 Business Days notice
to the Trustee (other than in the case of a redemption pursuant to a Tax Event)
(unless such shorter period shall be satisfactory to the Trustee) together with
an Officers' Certificate setting forth on a per ZONES and an aggregate basis,
the Redemption Amount, and the Contingent Principal Amount, Current Market
Value of the Reference Shares, deferred quarterly interest payments and the
Final Period Distribution. The Company shall give holders 30 Business Days
notice before any redemption of ZONES (in the case of redemption not pursuant
to a "tax event") and will irrevocably deposit with the Trustee sufficient
funds to pay the Redemption Amount for the ZONES. Distributions to be paid on
or before the redemption date for the ZONES will be payable to the holders on
the record dates for the related dates of distribution, except to the extent
such distributions are payable as part of the Final Period Distribution.

     Once notice of redemption is given and funds are irrevocably deposited,
interest on the ZONES will cease to accrue on and after the date of redemption
and all rights of the holders of the ZONES called for redemption will cease,
except for the right of holders to receive the Redemption Amount (but without
interest on such Redemption Amount), including, if applicable, the Final Period
Distribution.

                                      R-7

<PAGE>



     If any redemption date is not a Business Day, then the Redemption Amount
will be payable on the next Business Day (and without any interest or other
payment in respect of any such delay). However, if the next Business Day is in
the next calendar year, the Redemption Amount will be payable on the preceding
Business Day. If payment of the Redemption Amount for any ZONES called for
redemption is improperly withheld or refused and not paid by the Company,
interest on the ZONES will continue to accrue at an annual rate of 2.0% from
the original redemption date scheduled to the actual date of payment. In such a
case, the actual payment date will be the redemption date for purposes of
calculating the Redemption Amount. The Final Period Distribution will be deemed
paid on the original redemption date scheduled to the extent paid as set forth
in the definition of "Final Period Distribution" above.

     Reference Share Adjustments

     For purposes hereof "Reference Company" means Sprint Corporation, a Kansas
corporation, and any other issuer of a Reference Share. A "Reference Share"
means, collectively (a) one share of Sprint Corporation PCS common stock and
(b) each share of publicly traded equity securities received by a holder of a
Reference Share in respect of such share of the Sprint Corporation PCS common
stock or other Reference Shares (either directly or as the result of successive
applications of this paragraph) upon the following events: (i) the distribution
on or in respect of a Reference Share in Reference Shares, (ii) the combination
of Reference Shares into a smaller number of shares or other units, (iii) the
subdivision of outstanding shares or other units of Reference Shares, (iv) the
conversion or reclassification of Reference Shares by issuance or exchange of
other securities, (v) any consolidation or merger of a Reference Company, or
any surviving entity or subsequent surviving entity of a Reference Company (a
"Reference Company Successor"), with or into another entity (other than a
merger or consolidation in which the Reference Company is the continuing
corporation and in which the Reference Company common stock outstanding
immediately prior to the merger or consolidation is not exchanged for cash,
securities or other property of the Reference Company or another corporation),
(vi) any statutory exchange of securities of the Reference Company or any
Reference Company Successor with another corporation (other than in connection
with a merger or acquisition and other than a statutory exchange of securities
in which the Reference Company is the continuing corporation and in which the
Reference Company common stock outstanding immediately prior to the statutory
exchange is not exchanged for cash, securities or other property of the
Reference Company or another corporation), and (vii) any liquidation,
dissolution or winding up of the Reference Company or any Reference Company
Successor.

     For purposes of the foregoing: (a) a conversion or redemption by Sprint
Corporation of all shares of Sprint Corporation PCS common stock pursuant to
Article Sixth, Section 7.1 of its Articles of Incorporation shall be deemed a
consolidation or merger, with the Sprint PCS Group deemed to be the Reference
Company, with Sprint Corporation deemed to be the Reference Company Successor
if Sprint Corporation FON common stock or any other common stock of Sprint
Corporation is issued in exchange for the Sprint Corporation PCS common stock
or with the relevant acquiror of the Sprint PCS Group assets deemed to be the
Reference Company Successor if common stock other than Sprint Corporation FON
common stock is issued in exchange for the Sprint Corporation PCS common stock
and (b) a redemption by Sprint Corporation pursuant to Article Sixth, Section
7.2 of its Articles of Incorporation of all of the outstanding shares of Sprint
Corporation PCS common stock in exchange for common stock of one or more
wholly-owned subsidiaries that collectively hold all of the assets and
liabilities attributed to its PCS Group shall be deemed an exchange of shares
of Sprint Corporation PCS common stock for shares of common stock of the
relevant subsidiary or subsidiaries.

     As described above under "Interest and Additional Interest," the Company
shall pay as Additional Interest to holders of the Debentures any property
received in distribution on or in

                                      R-8

<PAGE>



respect of a Reference Share, unless it is also a Reference Share, in which
case it shall become part of a Reference Share. Upon any distribution of
fractional shares or units of securities, other than fractional Reference
Shares, the Company shall pay the holders cash in lieu of distribution of such
fractional shares or other units.

     A "Reference Share Offer" means any tender offer or exchange offer made
for all or a portion of a class of Reference Shares of a Reference Company. A
"Reference Share Offer" shall include a conversion or redemption by Sprint
Corporation of less than all shares of Sprint Corporation PCS common stock
pursuant to Article Sixth, Section 7.1 of its Articles of Incorporation.

     If a Reference Share Offer is made, the Company may, at its option,
either: (a) during the pendency of the offer, increase the Early Exchange Ratio
to 100%; or (b) make a Reference Share Offer Adjustment.

     A "Reference Share Offer Adjustment" means including as part of a
Reference Share each share of publicly traded equity securities, if any, deemed
to be distributed on or in respect of a Reference Share as average transaction
consideration less the Reference Share Proportionate Reduction (as defined
below).

     The average transaction consideration deemed to be received by a holder of
one Reference Share in a Reference Share Offer will be equal to (a) the
aggregate consideration actually paid or distributed to all holders of
Reference Shares in the Reference Share Offer, divided by (b) the total number
of Reference Shares outstanding immediately prior to the expiration of the
Reference Share Offer and entitled to participate in that Reference Share
Offer.

     The "Reference Share Proportionate Reduction" means a proportionate
reduction in the number of Reference Shares which are the subject of the
applicable Reference Share Offer and attributable to one ZONES calculated in
accordance with the following formula:

                                             X
                                   R   =   ------
                                             N

     where:

         R=       the fraction by which the number of Reference Shares of the
                  class of Reference Shares subject to the Reference Share
                  Offer and attributable to one ZONES will be reduced

         X=       the aggregate number of Reference Shares of the class of
                  Reference Shares subject to the Reference Share Offer
                  accepted in the Reference Share Offer

         N=       the aggregate number of Reference Shares of the class of
                  Reference Shares subject to the Reference Share Offer
                  outstanding immediately prior to the expiration of the
                  Reference Share Offer.

     If the Company elects to make a Reference Share Offer Adjustment, it shall
distribute as Additional Interest on each ZONES the average transaction
consideration deemed to be received on the Reference Shares of the class
subject to the Reference Share Offer and attributable to each ZONES immediately
prior to giving effect to the Reference Share Proportionate Reduction relating
to that Reference Share Offer (other than average transaction consideration
that is publicly traded equity securities which will themselves become
Reference Shares as a result of a Reference Share Offer Adjustment.)

                                      R-9

<PAGE>



     If the Company elects to make a Reference Share Offer Adjustment and,
during the pendency of the Reference Share Offer another Reference Share Offer
is commenced in relation to the Reference Shares the subject of the then
existing Reference Share Offer, the Company may change its original election by
electing to increase the Early Exchange Ratio to 100% during the pendency of
the new Reference Share Offer, or it may continue to elect to make a Reference
Share Offer Adjustment. The Company shall similarly be entitled to change its
election for each further Reference Share Offer made during the pendency of any
Reference Share Offer for the same class of Reference Shares. For the purposes
of these adjustments, a material change to the terms of an existing Reference
Share Offer shall be deemed to be a new Reference Share Offer.

     If the Company elects to increase the Early Exchange Ratio to 100% in
connection with a Reference Share Offer, no Reference Share Offer Adjustment
shall be made and the Company cannot change its election if any further
Reference Share Offer is made.

     Events of Default

     In case an Event of Default, as defined in the Indenture, shall occur and
be continuing, the Maturity Amount of all ZONES then outstanding under the
Indenture may be declared, or may become, due and payable upon the conditions
and in the manner and with the effect provided in the Indenture.

     Amount Payable upon Bankruptcy

     Upon dissolution, winding-up, liquidation or reorganization, whether
voluntary or involuntary or in bankruptcy, insolvency, receivership or other
similar proceedings in respect of the Company, holders of the ZONES should be
entitled to a claim against the Company in an amount equal to the higher of (a)
the Contingent Principal Amount of the ZONES or (b) the sum of the Current
Market Value (without giving effect to the provisions relating to Rollover
Offerings) of the Reference Shares plus any deferred quarterly payments of
interest, plus, in either case, the Final Period Distribution.

     Calculations in Respect of the ZONES

     The Company will be responsible for making all calculations called for
under the ZONES. These calculations include, but are not limited to,
determination of the Contingent Principal Amount of the ZONES; the Current
Market Value of Reference Shares; the Exchange Market Value of Reference
Shares; the Final Period Distribution on the ZONES; the cash value of any
property distributed on the Reference Shares; the composition of a Reference
Share; and the amount of accrued interest payable upon redemption or at
maturity of the ZONES.

     The Company must make all these calculations in good faith and such
calculations are final and binding on holders of the ZONES, absent manifest
error. The Company will provide a schedule of its calculations to the Trustee
and the Trustee is entitled to rely upon the accuracy of such calculations,
without independent verification. The Trustee shall be entitled to conclusively
rely on the accuracy of the information and calculations contained in each
Officers' Certificate delivered under this Debenture and shall have no
responsibility for verifying the accuracy thereof.

     Modifications

     To the extent permitted by, and as provided in the Indenture,
modifications or alterations of the Indenture, or of any indenture supplemental
thereto, and of the rights and obligations of the Company and of the holders of
the Securities, may be made by the Company with the consent of the holders of
not less than a majority of the principal amount (for the purposes of the
ZONES, the

                                      R-10

<PAGE>



principal amount of the ZONES for consenting holders and all holders shall be
calculated by reference to the original principal amount of such ZONES) of the
Securities then Outstanding of each series affected thereby; provided, however,
that no such modification or alteration shall (i) change the stated maturity of
the Principal of, or any sinking fund obligation or any installment of interest
on, such holder's Security; (ii) reduce the Principal thereof or the rate of
interest thereon, or any premium payable with respect thereto; (iii) change any
place of payment where, or the currency in which, any Security or any premium
or the interest thereon is payable; (iv) change the provisions for calculating
the optional redemption price, including the definitions relating thereto; (v)
make any change to Section 4.07 or 4.10 (except to include other provisions
subject to Section 4.10); (vi) reduce the percentage in principal amount of
outstanding Securities of the relevant series the consent of whose holders is
required for any such supplemental indenture, for any waiver of compliance with
any provisions of this Indenture or any Defaults and their consequences
provided for in this Indenture; (vii) alter or impair the right to convert any
Security at the rate and upon the terms provided in Article 13; (viii) waive a
default in the payment of Principal of or interest on any Security of such
holder (except pursuant to a rescission of acceleration pursuant to Section
4.01); (ix) adversely affect the rights of such holder under any mandatory
redemption or repurchase provision or any right of redemption or repurchase at
the option of such holder; (x) modify any of the provisions of this Section
7.02, except to increase any such percentage or to provide that certain other
provisions of this Indenture cannot be modified or waived without the consent
of the holder of each outstanding Security affected thereby; or (xi) change or
waive any provision that, pursuant to a board resolution or indenture
supplemental hereto establishing the terms of one or more series of Securities,
is prohibited to be so changed or waived.

     It is also provided in the Indenture that the holders of a majority in
aggregate principal amount (the principal amount of the ZONES for consenting
holders and all holders shall be calculated by reference to the original
principal amount of such ZONES) of the ZONES then Outstanding may on behalf of
the holders of all the ZONES under circumstances specified in the Indenture,
waive a past Event of Default under the Indenture and its consequences, except
a default in the payment of Principal of or interest on the ZONES. Any such
consent or waiver by the holder of this Debenture shall be conclusive and
binding upon such holder and upon all future holders of this Debenture and of
any Debenture or Debentures issued in exchange or substitution herefor,
irrespective of whether or not any notation of such consent or waiver is made
in this Debenture.

     Miscellaneous

     Except with respect to the rights of the holders of Senior Indebtedness
set forth in this Debenture and in the Indenture, no reference herein to the
Indenture and no provision of this Debenture or of the Indenture shall alter or
impair the obligation of the Company, which is absolute and unconditional, to
pay the principal of, premium, if any, or interest on this Debenture at the
place, at the respective times, at the rate, and in the coin or currency herein
prescribed.

     The Indenture permits both covenant defeasance and legal defeasance of the
ZONES pursuant to Article 9 of the Indenture.

     The Indenture contains provisions setting forth certain conditions to the
institution of proceedings by holders of the ZONES with respect to this
Debenture and the Indenture and the enforcement of remedies under this
Debenture and the Indenture, including, without limitation, the appointment of
a receiver or trustee. However, no reference herein to the Indenture and no
provision of this Debenture or the Indenture shall impair or affect the right
of any holder of any Debenture to receive payment of the principal of, premium,
if any, and interest on such Debenture on or after the respective dates
expressed in this Debenture, or to institute suit for the enforcement

                                      R-11

<PAGE>



of any such payment on or after such respective dates and any such right or
such enforcement thereof shall not require the consent of any other such
holder.

     The transfer of this Debenture is registrable by the registered holder
hereof, in person or by his attorney duly authorized in writing, on the books
of the Company to be kept for that purpose at the office or agency of the
Company in New York, New York, upon surrender and cancellation of this
Debenture and upon presentation of a duly executed written instrument of
transfer, and thereupon a new Debenture or Debentures of authorized
denominations for the same aggregate principal amount will be issued to the
transferee or transferees in exchange herefor; and this Debenture may be in
like manner exchanged for one or more Debentures of other authorized
denominations but of the same aggregate principal amount, all in the manner and
subject to the conditions in the Indenture contained and without payment of any
service or other charge, except for any stamp or other tax or governmental
charge in connection therewith. Prior to due presentment of this Debenture for
registration or transfer, the Company, the Trustee, any paying agent and any
Debenture registrar may deem and treat the person in whose name this Debenture
is registered as the absolute owner hereof for the purpose of receiving payment
hereof or on account hereof or of interest hereon (subject to the provisions of
the first paragraph on the face hereof) and for all other purposes.

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

     The Indenture and this Debenture shall be deemed to be a contract made
under the laws of the State of New York, and for all purposes shall be
construed in accordance with the laws of said jurisdiction, except that the
rights, duties, obligations, immunities and limitations of rights of the
Trustee pursuant to the Indenture and the Debenture shall be governed by and
construed in accordance with the laws of the State of New York.

     All capitalized terms used in this Debenture and not otherwise defined
herein shall have the meanings ascribed to them in the Indenture.



                                      R-12

<PAGE>



     The following abbreviations, when used in the inscription on the face of
this Debenture, shall be construed as though they were written out in full
according to applicable laws or regulations:

<TABLE>
     <S>                                          <C>
     TEN COM - as tenants in common               UNIF GIFT MIN ACT-..........Custodian..........
     TEN ENT - as tenants by the entireties                          (Cust)             (Minor)
     JT TEN  - as joint tenants with right of                       under Uniform Gifts to Minors
               survivorship and not as tenants                      Act___________________________
               in common                                                         (State)
</TABLE>

       Additional abbreviations may also be used though not in the above
list.

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

     For Value Received, ___________ hereby sell(s), assign(s) and transfer(s)
unto

PLEASE INSERT SOCIAL SECURITY OR OTHER
   IDENTIFYING NUMBER OF ASSIGNEE

- -----------------------------------------------------
:                                                    :
:                                                    :
- -----------------------------------------------------




- --------------------------------------------------------------------------------
     (PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING ZIP CODE, OF
ASSIGNEE)


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


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


- --------------------------------------------------------------------------------
the within Debenture and all rights thereunder, irrevocably constituting and
appointing


- -----------------------------------------------------------------------Attorney
to transfer said Debenture on the books of the within named Company with full
power of substitution in the premises.

Dated:
      ------------------------------------



                              --------------------------------------------------
                              NOTICE: THE SIGNATURE TO THIS ASSIGNMENT MUST
                                      CORRESPOND WITH THE NAME AS WRITTEN UPON
                                      THE FACE OF THE CERTIFICATE IN EVERY
                                      PARTICULAR, WITHOUT ALTERATION OR
                                      ENLARGEMENT OR ANY CHANGE WHATEVER.


                                      R-13



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