Document:

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                                                                    EXHIBIT 10.7
                                                                  CONFORMED COPY

                         AGREEMENT REGARDING OLD UNITED

         This Agreement Regarding Old United (this "AGREEMENT"), dated as of
January 30, 2002, is entered into among UnitedGlobalCom, Inc., a Delaware
corporation that upon the effectiveness of the Merger described under
"Background" below shall be renamed UGC Holdings, Inc. ("OLD UNITED"), Liberty
Media Corporation, a Delaware corporation, Liberty Global, Inc., a Delaware
corporation ("LIBERTY GLOBAL"), and Liberty UCOMA, LLC, a Delaware limited
liability company ("LIBERTY UCOMA").

                                   BACKGROUND

         The parties hereto have entered into an Amended and Restated Agreement
and Plan of Restructuring and Merger, dated as of December 31, 2001 (the "MERGER
AGREEMENT"), among Old United, New UnitedGlobalCom, Inc., a Delaware corporation
that at the effective time of the Merger shall be renamed UnitedGlobalCom, Inc.
("NEW UNITED"), United/New United Merger Sub, Inc., a Delaware corporation
("MERGER SUB"), Liberty, Liberty Media International, Inc., a Delaware
corporation ("LMI"), Liberty Global, and each Person indicated as a "Founder" on
the signature pages thereto. Subject to the terms and conditions set forth
therein, the Merger Agreement provides for the merger of Merger Sub with and
into Old United, with Old United as the surviving entity in such merger (the
"MERGER"), among other transactions. It is a condition to the consummation of
the transactions contemplated by the Merger Agreement, including without
limitation the Merger, that Old United, Liberty, Liberty Global and Liberty
UCOMA (as a "Contributing Party" under the Merger Agreement) each execute and
deliver this Agreement.

                                    AGREEMENT

         In consideration of the foregoing premises and for other good and
valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties hereto agree as follows:

         Section 1. CERTAIN DEFINITIONS. In this Agreement, the following terms
shall have the following meanings:

         AFFILIATE. When used with reference to a specified Person, any Person
who directly or indirectly through one or more intermediaries, Controls, is
Controlled by, or is under common Control with, the Person specified, provided
that (i) no officer or director of a Person, or any Affiliate of such officer or
director, investing for his, her or its own account or otherwise acting in his,
her or its individual capacity, and no director of a Person, or any Affiliate of
such director, acting in his, her or its capacity as an officer, director,
trustee, representative or agent of a Person that is not an Affiliate of the
specified Person, and in each case not in concert with or at the direction or
request of such specified Person, shall be deemed to be an Affiliate of such
specified Person for purposes of this Agreement; (ii) no Liberty Party shall be
deemed to be an Affiliate of New United or Old United and none of New United,
Old United or their respective Controlled Affiliates shall be deemed to be an
Affiliate of a Liberty Party, (iii) any Person in which New United, directly or
indirectly, Beneficially Owns 50% or more of the equity securities, without

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regard to voting power in the election of directors, shall (without limiting the
generality of this definition) be deemed to be an Affiliate of New United and
(iv) any Person in which Old United, directly or indirectly, Beneficially Owns
50% or more of the equity securities, without regard to voting power in the
election of directors, shall (without limiting the generality of this
definition) be deemed to be an Affiliate of Old United.

         AGREEMENT.  As defined in the preamble.

         BENEFICIAL OWNERSHIP AND DERIVATIVE TERMS. As determined pursuant to
Rule 13d-3 and Rule 13d-5 under the Exchange Act and any successor regulation,
except that in determining Beneficial Ownership, without duplication, (i) equity
securities that may be acquired pursuant to Rights to acquire equity securities
that are exercisable more than sixty days after a date shall nevertheless be
deemed to be Beneficially Owned, and (ii) except for purposes of the definition
of "Change of Control," (x) Beneficial Ownership, if any, arising solely as a
result of being a party to a Transaction Agreement or the Merger Agreement shall
be disregarded, and (y) Beneficial Ownership, if any, arising solely from being
a member of a Group shall be disregarded.

         CHANGE OF CONTROL. Any (a) change in the direct or indirect record or
Beneficial Ownership of any of the equity securities of New United, Old United
or any of their respective Affiliates, (b) merger, consolidation, statutory
share exchange or other transaction involving New United, Old United or any of
their respective Affiliates or (c) change in the composition of the board of
directors or other governing body of New United, Old United or any of their
respective Affiliates.

         CHANGE OF CONTROL COVENANT. Any covenant, agreement or other provision
(excluding requirements imposed by Law) pursuant to which the occurrence or
existence of a Change of Control would result in a violation or breach of,
constitute (with or without due notice or lapse of time or both) or permit any
Person to declare a default or event of default under, give rise to any right of
termination, cancellation, amendment, acceleration, repurchase, prepayment or
repayment or to increased payments under, give rise to or accelerate any
material obligation (including any obligation to, or to offer to, repurchase,
prepay, repay or make increased payments) or result in the loss or modification
of any material right or benefit under, or result in any Lien or give any Person
the right to obtain any Lien on any material asset pursuant to, any Contract to
which New United, Old United or any of their respective Affiliates is or becomes
a party or to which New United, Old United, any of their respective Affiliates
or any of their respective material assets are or become subject or bound.

         COMMON STOCK. The New United Class A Stock, the New United Class B
Stock and the New United Class C Stock.

         CONTRACT. Any note, bond, indenture, debenture, security agreement,
trust agreement, Lien, mortgage, lease, contract, license, franchise, permit,
guaranty, joint venture agreement, or other agreement, instrument,
understanding, commitment or obligation, oral or written.

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         CONTROL AND DERIVATIVE TERMS. The possession, directly or indirectly,
of the power to direct or cause the direction of the management and policies of
another Person, whether through the ownership of voting securities, by contract
or otherwise.

         CONTROLLED AFFILIATE. When used with reference to a specified Person,
an Affiliate of such Person that such Person directly, or through one or more
intermediaries, Controls; PROVIDED THAT, (a) none of New United and its
Controlled Affiliates or Old United and its Controlled Affiliates shall be
deemed to be a Controlled Affiliate of a Liberty Party, (b) any Person in which
New United, directly or indirectly, Beneficially Owns 50% or more of the equity
securities, without regard to voting power in the election of directors, shall
(without limiting the generality of this definition) be deemed to be a
Controlled Affiliate of New United and (c) any Person in which Old United,
directly or indirectly, Beneficially Owns 50% or more of the equity securities,
without regard to voting power in the election of directors, shall (without
limiting the generality of this definition) be deemed to be a Controlled
Affiliate of New United.

         CURRENT BONDS. As defined in the New United Charter as in effect on the
date hereof.

         EQUITY SECURITIES. The Common Stock and any other securities hereafter
issued by New United that are entitled to vote generally in the election of
directors.

         EXCHANGE ACT. The Securities Exchange Act of 1934, as amended, and the
rules and regulations thereunder.

         FOUNDERS. As defined in the Stockholders Agreement.

         HSR ACT. The Hart-Scott-Rodino Antitrust Improvements Act of 1976, as
amended.

         GOVERNMENTAL AUTHORITY. Any U.S. federal, state or local or any foreign
court, governmental department, commission, authority, board, bureau, agency or
other instrumentality.

         GROUP. As defined in Section 13(d) of the Exchange Act and the rules
and regulations thereunder, but the existence of the Transaction Agreements and
the Merger Agreement shall be disregarded in determining whether a Group exists.

         JUDGMENT. Any order, writ, injunction, award, judgment, ruling or
decree of any Governmental Authority.

         LAW. Any U.S. federal, state or local or any foreign statute, code,
ordinance, decree, rule, regulation or general principle of common or civil law
or equity.

         LIBERTY. Liberty Media Corporation, a Delaware corporation, and any
successor (by merger, consolidation, transfer or otherwise) to all or
substantially all of its assets.

         LIBERTY GLOBAL. As defined in the preamble.

         LIBERTY PARTIES. Liberty, Liberty Global and Liberty UCOMA.

         LIBERTY UCOMA. As defined in the preamble.

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         LICENSE. Any license, franchise, authorization, permit, certificate,
variance, exemption, concession, consent, lease, right of way, easement,
instrument, order and approval, domestic or foreign, of any Governmental
Authority.

         LIEN. Any mortgage, pledge, lien, encumbrance, charge or security
interest.

         LMI. As defined in the "Background" above.

         MERGER. As defined under "Background" above.

         MERGER AGREEMENT. As defined under "Background" above.

         MERGER SUB. As defined under "Background" above.

         NEW UNITED. As defined under "Background" above.

         NEW UNITED BYLAWS. The Bylaws of New United, as such Bylaws may be
amended from time to time in accordance with the New United Charter, such Bylaws
and the Stockholders Agreement.

         NEW UNITED CHARTER. The Restated Certificate of Incorporation of New
United as filed with the Secretary of State of the State of Delaware on December
31, 2001, as it may be amended from time to time.

         NEW UNITED CLASS A STOCK. The Class A Common Stock, par value $0.01 per
share, of New United.

         NEW UNITED CLASS B STOCK. The Class B Common Stock, par value $0.01 per
share, of New United.

         NEW UNITED CLASS C STOCK. The Class C Common Stock, par value $0.01 per
share, of New United.

         PERMITTED TRANSFEREE. Any Person Controlled by Liberty.

         PERSON. Any individual, corporation, limited liability company,
partnership, joint venture, Governmental Authority, business association or
other entity.

         RESTRICTION. With respect to any capital stock, partnership interest,
membership interest in a limited liability company or other equity interest or
security, any voting or other trust or agreement, option, warrant, preemptive
right, right of first offer, right of first refusal, escrow arrangement, proxy,
buy-sell agreement, power of attorney or other Contract and any License or
Judgment that, conditionally or unconditionally, (a) grants to any Person the
right to purchase or otherwise acquire, or obligates any Person to sell or
otherwise dispose of or issue, or otherwise results or, whether upon the
occurrence of any event or with notice or lapse of time or both or otherwise,
may result in any Person acquiring, (i) any of such capital stock or other
equity interest or security; (ii) any of the proceeds of, or any distributions
paid or that are or may become payable with respect to, any of such capital
stock or other equity interest or security; or

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(iii) any interest in such capital stock or other equity interest or security or
any such proceeds or distributions; (b) restricts or, whether upon the
occurrence of any event or with notice or lapse of time or both or otherwise, is
reasonably likely to restrict the transfer or voting of, or the exercise of any
rights or the enjoyment of any benefits arising by reason of ownership of, any
such capital stock or other equity interest or security or any such proceeds or
distributions; or (c) creates or, whether upon the occurrence of any event or
with notice or lapse of time or both or otherwise, is reasonably likely to
create a Lien or purported Lien affecting such capital stock or other equity
interest or security, proceeds or distributions.

         RIGHTS. When used with respect to a specified Person, securities of
such Person (which may include equity securities) that (contingently or
otherwise) are exercisable, convertible or exchangeable for or into equity
securities of such Person (with or without consideration) or that carry any
right to subscribe for or acquire equity securities of such Person or securities
exercisable, convertible or exchangeable for or into equity securities of such
Person.

         STANDSTILL AGREEMENT. That certain Standstill Agreement dated as of the
date hereof among United and the Liberty Parties.

         STOCKHOLDERS AGREEMENT. That certain Stockholders Agreement dated as of
the date hereof among New United, the Liberty Parties and the Founders.

         SUBSIDIARY. As defined in the Standstill Agreement.

         TRANSACTION AGREEMENTS. As defined in the Stockholders Agreement.

         TRANSFER. As defined in the Stockholders Agreement.

         Section 2. CERTAIN COVENANTS.

         (a) Without limitation of any other applicable provision hereof or of
any other Transaction Agreement, without the prior written consent of Liberty,
which consent may be granted or withheld in Liberty's sole discretion, Old
United will not take any action and will not permit any action to be taken on
its behalf, and will use its best commercially reasonable efforts to prevent any
action from being taken by or on behalf of any of its Affiliates, that would
result in New United, Old United or any of their respective Affiliates being
subject to or bound by any Change of Control Covenant, unless any Change of
Control involving or caused by the action of Liberty, Liberty Global, Liberty
UCOMA, LMI or any of their respective Affiliates (other than a transfer by any
of the foregoing to an unaffiliated third party of Control of New United, if
such Control is obtained in the future) is exempted from the application and
effects of such Change of Control Covenant. Old United will not be deemed to be
in breach of the foregoing as a result of its or its Affiliates entering into or
maintaining in the ordinary course of business a License granted by a
Governmental Authority that includes a Change of Control Covenant provided that
(i) such License is of the kind and nature that customarily requires approval of
the Governmental Authority granting the same for a Change of Control, (ii) the
applicable Change of Control Covenant includes only terms customarily imposed by
such Governmental Authority in similar circumstances, (iii) the maximum penalty
for breach of such Change of Control Covenant is termination of the applicable
License, and (iv) Old United used its best commercially reasonable efforts to
obtain the exemption from the application and effects of such Change of Control

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Covenant contemplated by the preceding sentence. Without the prior written
consent of Liberty, which consent may be granted or withheld in Liberty's sole
discretion, Old United will not take any action or permit any action to be taken
that would, or fail to take any action or permit any action to be omitted where
such failure or omission would, extend or perpetuate the applicability of any
Change of Control Covenant in effect as of May 25, 2001 under the Current Bonds
beyond the maturity date in effect as of May 25, 2001 of the Current Bonds to
which they relate. Old United will use its best commercially reasonable efforts
to take such actions as will cause the conditions necessary to permit the
conversion in full of the New United Class C Stock into New United Class B Stock
to be satisfied.

         (b) Without limitation of any other applicable provision hereof or of
any other Transaction Agreement, without the prior written consent of Liberty,
Old United shall not, and shall not permit any of its Controlled Affiliates to,
(i) (A) enter into, or issue, assume or adopt, any Contract that would be or
that purports to be binding upon Liberty or any of its Affiliates or any of
their respective assets, or (B) enter into, or issue, assume or adopt, any
material Contract in respect of which any act or omission of Liberty or any of
its Affiliates would result in a violation or breach thereof, or constitute
(with or without due notice or lapse of time or both), or permit any Person to
declare, a default or event of default thereunder, or give rise to any right of
termination, cancellation, amendment, acceleration, repurchase, prepayment or
repayment or to increased payments thereunder, or give rise to or accelerate any
material obligation (including, without limitation, any obligation to, or to
offer to, repurchase, prepay, repay or make increased payments) or result in the
loss or modification of any material rights or benefits thereunder, or result in
any Lien or Restriction on any of the material assets of, or otherwise have any
adverse effect on, Old United or any of its Affiliates, or (ii) amend or modify
any Contract described in clause (i) of this sentence; provided however, that
this Section 2(b) shall not restrict Old United from subjecting itself or any of
its Controlled Affiliates to a Change of Control Covenant to the extent
permitted under Section 2(a).

         Section 3. TERMINATION. This Agreement shall terminate as to any
Liberty Party the voting power of whose Beneficially Owned Equity Securities
(together with that of its Permitted Transferees and Controlled Affiliates) is
reduced to 10% or less of the voting power of equity securities in Old United
that such Liberty Party (together with its Permitted Transferees and Controlled
Affiliates) Beneficially Owned as of June 25, 2000. For purposes of this Section
3, the voting power of outstanding shares of New United Class C Stock, if any,
shall be calculated as if such shares had been converted into shares of New
United Class B Stock.

         Section 4. APPLICABLE LAW, JURISDICTION. This Agreement shall be
governed by Colorado law without regard to conflicts of law rules. The parties
hereby irrevocably submit to the jurisdiction of any Colorado State or United
States Federal court sitting in Colorado over any action or proceeding arising
out of or relating to this Agreement or any agreement contemplated hereby, and
the undersigned hereby irrevocably agree that all claims in respect of such
action or proceeding may be heard and determined in such State or Federal court.
The undersigned further waive any objection to venue in such State and any
objection to any action or proceeding in such State on the basis of a
non-convenient forum. Each party hereby IRREVOCABLY WAIVES ANY RIGHT TO A TRIAL
BY JURY in any proceeding brought with respect to this Agreement or the
transactions contemplated hereby.

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         Section 5. REMEDIES. Each of the parties acknowledges and agrees that
in the event of any breach of this Agreement, the nonbreaching party would be
irreparably harmed and could not be made whole by monetary damages. Accordingly,
the parties to this Agreement, in addition to any other remedy to which they may
be entitled hereunder or at law or in equity, shall be entitled to compel
specific performance of this Agreement.

         Section 6. HEADINGS. The headings in this Agreement are for convenience
only and are not to be considered in interpreting this Agreement.

         Section 7. NOTICES. All notices and other communications hereunder
shall be delivered to the parties hereto in the same manner as set forth in the
Merger Agreement.

         Section 8. SEVERABILITY. The invalidity or unenforceability of any
provision of this Agreement in any application shall not affect the validity or
enforceability of such provision in any other application or the validity or
enforceability of any other provision.

         Section 9. WAIVERS AND AMENDMENTS. No waiver of any provision of this
Agreement shall be deemed a further or continuing waiver of that provision or a
waiver of any other provision of this Agreement. This Agreement may not be
amended except in a writing signed by all parties.

         Section 10. INTERPRETATION. As used herein, except as otherwise
indicated herein or as the context may otherwise require, the words "include,"
"includes" and "including" are deemed to be followed by "without limitation"
whether or not they are in fact followed by such words or words of like import;
the words "hereof," "herein," "hereunder" and comparable terms refer to the
entirety of this Agreement and not to any particular article, section or other
subdivision hereof or Appendix hereto; any pronoun shall include the
corresponding masculine, feminine and neuter forms; the singular includes the
plural and vice versa; references to any agreement or other document are to such
agreement or document as amended and supplemented from time to time; references
to "Section" or another subdivision are to a section or subdivision hereof; and
all references to "the date hereof," "the date of this Agreement" or similar
terms (but excluding references to the date of execution hereof) refer to the
date first above written, notwithstanding that the parties may have executed
this Agreement on a later date.

         Section 11. RULES OF CONSTRUCTION. The parties hereto agree that they
have been represented by counsel during the negotiation, preparation and
execution of this Agreement and, therefore, waive the application of any law,
regulation, holding or rule of construction providing that ambiguities in an
agreement or other document will be construed against the party drafting such
agreement or document.

         Section 12. COUNTERPART EXECUTION. This Agreement may be executed in
any number of counterparts, each of which shall be deemed an original but all of
which will constitute a single agreement.

         Section 13. PARTIES IN INTEREST. Nothing in this Agreement, express or
implied, is intended to confer upon any Person other than the parties hereto,
their Permitted Transferees, in the case of the Liberty Parties, and their
permitted successors and assigns, any benefits, rights or remedies. Neither this
Agreement nor the rights or obligations of any party may be assigned or

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delegated (other than, in the case of a Liberty Party, to a Permitted
Transferee) by operation of law or otherwise without the prior written consent
of Liberty and Old United. Notwithstanding the foregoing, any Person that
succeeds to Liberty's rights and obligations under the Stockholders Agreement
and the Standstill Agreement shall be entitled, as an express third party
beneficiary, to all of the rights of Liberty hereunder to the same extent as if
all references to Liberty herein referred to such Person.

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IN WITNESS WHEREOF, the parties hereto have executed as of the date first set
forth above.

                                   UNITEDGLOBALCOM, INC.,
                                   a Delaware corporation

                                   By: /s/ MICHAEL T. FRIES
                                      --------------------------------------
                                      Michael T. Fries
                                      President

                                   LIBERTY MEDIA CORPORATION,
                                   a Delaware corporation

                                   By: /s/ ELIZABETH M. MARKOWSKI
                                      --------------------------------------
                                      Elizabeth M. Markowski
                                      Senior Vice President

                                   LIBERTY GLOBAL, INC.,
                                   a Delaware corporation

                                   By: /s/ ELIZABETH M. MARKOWSKI
                                      --------------------------------------
                                      Elizabeth M. Markowski
                                      Senior Vice President

                                   LIBERTY UCOMA, LLC,
                                   a Delaware limited liability company

                                   By: /s/ ELIZABETH M. MARKOWSKI
                                      --------------------------------------
                                      Elizabeth M. Markowski
                                      Senior Vice President<Page>

                                                                    EXHIBIT 10.8
                                                                  CONFORMED COPY

                    AGREEMENT REGARDING ADDITIONAL COVENANTS

         This Agreement Regarding Additional Covenants (this "AGREEMENT") is
entered into as of January 30, 2002, among UnitedGlobalCom, Inc., a Delaware
corporation formerly known as New UnitedGlobalCom, Inc. ("UNITED"), and Liberty
Media Corporation, and Liberty Global, Inc. ("LIBERTY GLOBAL"), each of which is
a Delaware corporation, and Liberty UCOMA, LLC, a Delaware limited liability
company ("LIBERTY UCOMA").

                                   BACKGROUND

         Pursuant to the Amended and Restated Agreement and Plan of
Restructuring and Merger, dated as of December 31, 2001 (the "MERGER
AGREEMENT"), among United, Liberty, Liberty Media International, Inc., a
Delaware corporation ("LMI"), Liberty Global, the Founders (as defined therein),
UGC Holdings, Inc., a Delaware corporation formerly known as UnitedGlobalCom,
Inc. ("OLD UNITED"), et al., Liberty and Liberty Global have acquired Beneficial
Ownership of shares of Class C Common Stock, par value $.01 per share, of
United. As required by the Merger Agreement, the parties hereto are entering
into this Agreement.

                                    AGREEMENT

         Section 1. CERTAIN DEFINITIONS. In this Agreement, the following terms
shall have the following meanings:

         3-09 PERSON. As defined in Section 2(e).

         AFFILIATE. When used with reference to a specified Person, any Person
who directly or indirectly through one or more intermediaries, Controls, is
Controlled by, or is under common Control with, the Person specified, provided
that (i) no officer or director of a Person, or any Affiliate of such officer or
director, investing for his, her or its own account or otherwise acting in his,
her or its individual capacity, and no director of a Person, or any Affiliate of
such director, acting in his, her or its capacity as an officer, director,
trustee, representative or agent of a Person that is not an Affiliate of the
specified Person, and in each case not in concert with or at the direction or
request of such specified Person, shall be deemed to be an Affiliate of such
specified Person for purposes of this Agreement; (ii) no Liberty Party shall be
deemed to be an Affiliate of United and none of United and its Controlled
Affiliates shall be deemed to be an Affiliate of a Liberty Party and (iii) any
Person in which United, directly or indirectly, Beneficially Owns 50% or more of
the equity securities, without regard to voting power in the election of
directors, shall (without limiting the generality of this definition) be deemed
to be an Affiliate of United.

         BELMARKEN LOAN AGREEMENTS. As defined in the Merger Agreement.

         BELMARKEN NOTES. As defined in the Merger Agreement.

         BENEFICIAL OWNERSHIP AND DERIVATIVE TERMS. As defined in the Standstill
Agreement.

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         BOARD. The Board of Directors of United.

         BUSINESS DAY. As defined in the Standstill Agreement.

         CHANGE OF CONTROL COVENANT. As defined in the Stockholders Agreement.

         CLASS C DIRECTOR. As defined in the United Charter.

         COMMISSION. As defined in Section 2(e).

         CONTRACT. Any note, bond, indenture, debenture, security agreement,
trust agreement, Lien, mortgage, lease, contract, license, franchise, permit,
guaranty, joint venture agreement, or other agreement, instrument,
understanding, commitment or obligation, oral or written.

         CONTROL AND DERIVATIVE TERMS. The possession, directly or indirectly,
of the power to direct or cause the direction of the management and policies of
another Person, whether through the ownership of voting securities, by contract
or otherwise.

         CONTROLLED AFFILIATE. When used with reference to a specified Person,
any Affiliate of such Person that such Person directly, or indirectly through
one or more intermediaries, Controls; PROVIDED THAT, (a) none of United and its
Controlled Affiliates shall be deemed to be a Controlled Affiliate of a Liberty
Party and (b) any Person in which United, directly or indirectly, beneficially
owns 50% or more of the equity securities, without regard to voting power in the
election of directors, shall (without limiting the generality of this
definition) be deemed to be a Controlled Affiliate of United.

         EQUITY SECURITIES. The common stock of United and any other securities
hereafter issued by United that are entitled to vote generally in the election
of directors.

         EXCHANGE ACT. The Securities Exchange Act of 1934, as amended, and the
rules and regulations thereunder.

         GAAP. As defined in Section 2(e)

         GOVERNMENTAL AUTHORITY. As defined in the Stockholders Agreement.

         HSR ACT. The Hart-Scott-Rodino Antitrust Improvements Act of 1976, as
amended.

         LIBERTY. Liberty Media Corporation, a Delaware corporation, and any
successor (by merger, consolidation, transfer or otherwise) to all or
substantially all of its assets

         LIBERTY DIRECTOR. As defined in the Standstill Agreement.

         LIBERTY GLOBAL. As defined in the preamble.

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         LIBERTY PARTIES. Liberty, Liberty Global and Liberty UCOMA and
including any Permitted Transferee of a Liberty Party who hereafter becomes
bound by or who is required to become bound by the Stockholders Agreement for so
long as such Person is or is required to be so bound. LMI, Liberty Global,
Liberty UCOMA and any such Permitted Transferee will each cease to be a Liberty
Party at such time as such Person is no longer a Controlled Affiliate of
Liberty.

         LIBERTY PERSON. As defined in Section 2(e).

         LIBERTY UCOMA. As defined in the preamble.

         LIEN. Any mortgage, pledge, lien, encumbrance, charge, or security
interest.

         LMI. As defined under "Background" on the first page of this Agreement.

         MERGER AGREEMENT. As defined under "Background" on the first page of
this Agreement.

         NON-COMPLYING PERSON. As defined in Section 2(e).

         OLD UNITED. As defined under "Background" on the first page of this
Agreement.

         PERMITTED TRANSFEREE. Liberty and any Person Controlled by Liberty.

         PERSON. Person shall mean any individual, firm, corporation,
partnership, limited liability company, trust, joint venture, or other entity,
and shall include any successor (by merger or otherwise) of such entity.

         RESTRICTION. As defined in the Stockholders Agreement.

         SAS 543. As defined in Section 2(e).

         STANDSTILL AGREEMENT. That certain Standstill Agreement dated as of the
date hereof among United and the Liberty Parties.

         STOCKHOLDERS AGREEMENT. The Stockholders Agreement dated as of the date
hereof among United, the Liberty Parties, and certain other stockholders of
United.

         SUBSIDIARY. As defined in the Standstill Agreement.

         TRANSACTION AGREEMENTS. As defined in the Stockholders Agreement.

         TRANSFER. As defined in the Stockholders Agreement.

         UNITED BYLAWS. The Bylaws of United, as such Bylaws may be amended from
time to time in accordance with the United Charter, such Bylaws and this
Agreement.

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         UNITED CHARTER. The Restated Certificate of Incorporation of United as
filed with the Secretary of State of the State of Delaware on December 31, 2001,
as it may be amended from time to time.

         Section 2. ADDITIONAL COVENANTS.

         (a) Without limitation of any other applicable provision hereof or of
any other Transaction Agreement, without the prior written consent of Liberty,
United shall not, and shall not permit any of its Controlled Affiliates to,
(i)(A) enter into, or issue, assume or adopt, any Contract that would be or that
purports to be binding upon Liberty or any of its Affiliates or any of their
respective assets, or (B) enter into, or issue, assume or adopt any material
Contract in respect of which any act or omission of Liberty or any of its
Affiliates would result in a violation or breach thereof, or constitute (with or
without due notice or lapse of time or both), or permit any Person to declare, a
default or event of default thereunder, or give rise to any right of
termination, cancellation, amendment, acceleration, repurchase, prepayment or
repayment or to increased payments thereunder, or give rise to or accelerate any
material obligation (including, without limitation, any obligation to, or to
offer to, repurchase, prepay, repay or make increased payments) or result in the
loss or modification of any material rights or benefits thereunder, or result in
any Lien or Restriction on any of the material assets of, or otherwise have any
material adverse effect on, United or any of its Affiliates or (ii) amend or
modify any Contract described in clause (i) of this sentence; provided however,
that this Section 2(a) shall not restrict United or any of its Controlled
Affiliates from subjecting itself or any of its Controlled Affiliates to a
Change of Control Covenant permitted under Section 3(b) of the Stockholders
Agreement.

         (b) Without limitation of any other applicable provision hereof or of
any other Transaction Agreement, United shall not, and shall not permit any of
its Subsidiaries to, directly or indirectly, effect any transaction or enter
into any Contract of any kind whatsoever between or among United or any of its
Subsidiaries, on the one hand, and Old United or any of its Controlled
Affiliates, on the other hand, or agree or commit to do any of the foregoing,
unless the proposed transaction or Contract has first been approved by the Board
by the vote of not less than a majority of the members thereof, which
affirmative vote shall include the affirmative vote of a majority of the Class C
Directors or Liberty Directors, as the case may be, or by unanimous written
consent.

         (c) Without limitation of any other applicable provision hereof or of
any other Transaction Agreement, United shall not, and shall not permit any of
its Controlled Affiliates to, directly or indirectly, in whole or in part, sell,
assign, transfer, exchange, contribute, pledge, encumber, grant any option with
respect to or otherwise dispose of (each, a "DISPOSITION") any of the Belmarken
Notes or any interest therein, or any rights under or interest in the Belmarken
Loan Agreements (including, without limitation, by Disposition of an interest in
a Person that holds any of the foregoing), or agree to do any of the foregoing,
unless the proposed Disposition has first been (i) reviewed by the Board, (ii)
in the case of a proposed Disposition to any Affiliate of United (including,
without limitation, Old United or any of its Affiliates), approved by the Board
by the vote of not less than a majority of the members thereof, which
affirmative vote shall include the affirmative vote of a majority of the Class C
Directors or Liberty Directors, as the case may be, or by unanimous written
consent, and (iii) in the case of any other proposed Disposition, approved by
the Board.

                                       4

<Page>

         (d) Without limitation of any other applicable provision hereof or any
other Transaction Agreement, United shall not effect any amendment, alteration,
restatement or repeal of Section 3.12 of the United Bylaws unless the proposed
amendment, alteration, restatement or repeal has first been approved by the
Board by the vote of not less than a majority of the members thereof, which
affirmative vote shall include the affirmative vote of a majority of the Class C
Directors or Liberty Directors, as the case may be, or by unanimous written
consent.

         (e) Without limitation of any other applicable provision hereof or any
other Transaction Agreement, United hereby agrees as follows:

                  (i) United shall provide to Liberty:

                  (A) within 45 days after the end of each fiscal year of
         United, a preliminary balance sheet, income statement and consolidated
         statement of stockholders equity (deficit) of United and its
         subsidiaries for such fiscal year;

                  (B) within 60 days after the end of each fiscal year of
         United, a final balance sheet, income statement and consolidated
         statement of stockholders equity (deficit) of United and its
         subsidiaries for such fiscal year;

                  (C) within 75 days after the end of each fiscal year of
         United, draft consolidated financial statements, including related
         footnotes, of United and its subsidiaries for such fiscal year and a
         "Management's Discussion and Analysis of Results of Operations and
         Financial Condition" (in such form as would be included in a Form 10-K
         filed under the Exchange Act);

                  (D) no later than the 3rd business day prior to the day on
         which United's Form 10-K shall be filed with the Securities and
         Exchange Commission (the "Commission") (but, in any event, no later
         than the 87th day following the end of each fiscal year of United),
         final audited consolidated financial statements, including related
         footnotes, of United and its subsidiaries for such fiscal year, which
         shall be provided to Liberty in paper form and electronic format for
         inclusion in Liberty's Form 10-K for the relevant fiscal year in the
         same form in which United shall file the same with its Form 10-K for
         the relevant fiscal year, and a "Management's Discussion and Analysis
         of Results of Operations and Financial Condition" (in such form as
         would be included in a Form 10-K filed under the Exchange Act);

                  (E) within 20 days after the end of each of the first three
         fiscal quarters of each fiscal year of United, a preliminary income
         statement of United and its subsidiaries for such fiscal quarter;

                  (F) within 35 days after the end of each of the first three
         fiscal quarters of each fiscal year of United, a final balance sheet,
         income statement and consolidated statement of stockholders equity
         (deficit) of United and its subsidiaries for such fiscal quarter;

                                       5

<Page>

                  (G) within 40 days after the end of each of the first three
         fiscal quarters of each fiscal year of United, draft financial
         statements, including related footnotes, of United and its subsidiaries
         for such fiscal quarter, which shall include final numbers that have
         been reviewed in accordance with Statement of Auditing Standards No. 71
         ("SAS 71") (however, it being expressly understood that such auditors
         will not be required to issue a SAS 71 review report in accordance with
         such review) by United's auditors, and a "Management's Discussion and
         Analysis of Results of Operations and Financial Condition" (in such
         form as would be included in a Form 10-Q filed under the Exchange Act);
         and

                  (H) within 25 days after the end of each month, (1) United's
         internal financial reporting package for the prior month, which shall
         report, at a minimum, revenue and earnings before interest, taxes,
         depreciation and amortization (including, without limitation, a
         budget-to-actual comparison) for United's major operating businesses,
         and (2) an operational statistics report, which shall include
         non-financial operating data for United's major operating businesses,
         such as video, telephony and data subscribers, total revenue generating
         units, homes passed, penetration and other operational statistics used
         by the management of United to review United's operating results,
         together with such management's comments regarding any significant
         financial and non-financial variances.

Each of the financial statements referred to clauses (A) through (G) of this
Section 2(e)(i) shall be prepared in accordance with generally accepted
accounting principles in the United States, consistently applied ("GAAP"), and
shall comply in all material respects with the published rules and regulations
of the Commission that apply to the preparation of such interim financial
statements (pursuant to Article 10 of Regulation S-X) and annual financial
statements. In addition, United shall provide to Liberty copies of any
certificates certifying compliance by United or any of its subsidiaries with its
debt covenants under any indebtedness at the same time as such certificates are
supplied to any creditor or bank or to any trustee for distribution to the
holders of such indebtedness.

                  (ii) United shall use its best efforts to cause its auditors
to cooperate in all reasonable respects with Liberty's auditors to enable them,
as principal auditor, to perform and otherwise comply with applicable auditing
procedures prescribed by Statement on Auditing Standards, Section 543,
including, without limitation:

                           (A) confirming in writing, within 60 days after the
         end of each fiscal year of Liberty and within 40 days after the end of
         each of the first three fiscal quarters of each fiscal year of Liberty,
         the independence of United's auditors under the requirements of The
         American Institute of Certified Public Accountants and the Commission;

                           (B) meeting, with United's management present or,
         with the prior approval of United's management, without United's
         management present, during the first three fiscal quarters of each
         fiscal year of United, prior to the 5th day before a filing is due with
         the Commission for the immediately preceding fiscal quarter, with
         Liberty's auditors to discuss the review procedures followed by
         United's auditors and the results thereof;

                                       6

<Page>

                           (C) meeting, after United's auditors have completed
         their SAS 71 review of United's third quarter results and preliminary
         audit testing and have developed their final year end audit plan
         (expected to be in early to mid December of each calendar year), with
         United's management present or, with the prior approval of United's
         management, without United's management present, with Liberty's
         auditors to review the audit plan and working papers, including the
         understanding of internal control, the assessment of control risk, any
         audit testwork supporting significant transactions and any accounting
         memoranda supporting the application of GAAP, of United's auditors (it
         being agreed that Liberty's auditors shall have the right to issue
         specific instructions to United's auditors as to the scope of their
         audit work, if deemed necessary in the sole discretion of Liberty's
         auditors);

                           (D) meeting, with United's management present or,
         with the prior approval of United's management, without United's
         management present, within 65 days after the end of each fiscal year of
         Liberty, with Liberty's auditors to discuss the audit procedures
         followed by United's auditors and the results thereof and to review the
         working papers of United's auditors, including the understanding of
         internal control, the assessment of control risk, any audit testwork
         supporting significant transactions and any accounting memoranda
         supporting the application of GAAP, including only those items set
         forth in this item (D) and in item (C) immediately above which were
         prepared or finalized subsequent to the completion by United's auditors
         of their SAS 71 interim review of United's third quarter results and
         completion by United's auditors of their preliminary audit testing; and

                           (E) making available for review by Liberty and its
         auditors, promptly upon the request of Liberty, the working papers of
         Old United for the years ended December 31, 2001 and December 31, 2000
         to assist in the determination of the appropriate purchase accounting
         adjustments required to be recorded by Liberty to reflect its
         acquisition of shares of Old United and/or United, as applicable.

                  (iii) United shall cause its management personnel to (A) meet,
within 70 days after the end of each fiscal year of Liberty, with Liberty's
auditors to discuss the accounts of United and (B) cooperate with Liberty's
auditors in any supplemental tests of such accounts (it being agreed that the
determination of the extent of additional procedures, if any, to be applied
shall rest solely with Liberty's auditors).

                  (iv) United shall use its best efforts to cause its auditors
to provide to Liberty such auditors' written consent to the inclusion of or
reliance on their report in any filing made by Liberty with the Commission
requiring such consent not more than 24 hours after being provided with a final
version of such filing, which efforts shall include, without limitation, the
timely provision by United to its auditors of any letters of representations
required by such auditors in connection with the delivery of their consent to
Liberty and timely provision by Liberty to United and its auditors of
preliminary versions of such filing.

                                       7

<Page>

                  (v) United shall use its best efforts to (A) cause each of its
"significant subsidiaries" (as such term is defined in Rule 1-02 of Regulation
S-X) and each of its affiliates (1) which is accounted for using the equity
method of accounting and (2) with respect to which Liberty must provide
financial disclosure pursuant to Rule 3-09 of Regulation S-X, in each case
whether currently owned or hereafter acquired (each such significant subsidiary
and affiliate, a "3-09 PERSON"), to provide to Liberty financial statements
prepared in accordance with GAAP that meet the requirements of Regulation S-X
for inclusion in any filing made by Liberty with the Commission requiring such
financial statements prior to the 5th day before such filing shall be made (such
filing date to be determined in the sole discretion of Liberty), and (B) cause
the auditors of any such 3-09 Person to provide to Liberty such auditors'
written consent to the inclusion of or reliance on their report in any such
filing not more than 24 hours after being provided with a final version of such
filing, which efforts shall include, without limitation, causing such 3-09
Person to provide to its auditors, on a timely basis, any letters of
representations required by such auditors in connection with the delivery of
their consent to Liberty and timely provision by Liberty to such other auditors
of preliminary versions of such filing. The determination as to whether a Person
qualifies as a 3-09 Person shall be made in the reasonable judgment of Liberty
and its auditors.

                  (vi) United shall not effect any acquisition, merger, exchange
or other transaction pursuant to which United would acquire a Person that would
qualify as a 3-09 Person, unless such Person can provide to Liberty, within the
time frames prescribed by Section 2(e)(v), financial statements prepared in
accordance with GAAP that comply in all respects with Regulation S-X, including,
without limitation, Rule 3-05 of Regulation S-X.

                  (vii) United shall, and shall use its best efforts to cause
each 3-09 Person to, afford to the officers, employees, counsel, auditors and
other authorized representatives of Liberty ("Liberty Persons") reasonable
access during normal business hours, to its personnel, auditors, books and
records and furnish promptly to such Liberty Persons such financial and
operating data and other information concerning its business, properties,
personnel and affairs as such Liberty Persons will from time to time reasonably
request and instruct the officers, directors, employees, counsel and auditors of
United and each 3-09 Person to discuss business operations, affairs and assets
of United and each 3-09 Person and otherwise fully cooperate with each Liberty
Person in its review of the business and financial affairs of United and each
3-09 Person, in each case to the extent reasonably necessary to enable Liberty
to comply timely with its reporting obligations under the Exchange Act. In
addition, if at any time Liberty and its auditors, in their reasonable judgment,
determine that the financial statements of United or any 3-09 Person (any such
Person, a "Non-Complying Person") were not prepared in accordance with GAAP, do
not comply in all material respects with Regulation S-X or will not be provided
to Liberty within the applicable time frame prescribed by this Section 2(e),
United shall use its best efforts to cause each Non-Complying Person to (A)
suspend the services of its current auditors and (B) afford to the Liberty
Persons access to all books, records and working papers of such Non-Complying
Person's current auditors necessary to enable a new auditor designated by
Liberty to perform a full audit of such Non-Complying Person.

                  (viii) United shall inform Liberty of any material accounting
or reporting issue arising during the course of United's fiscal year within a
reasonable period of time following the

                                       8

<Page>

time at which any officer, director, employee or auditor of United first becomes
aware of such issue, if such issue could, in United's reasonable judgment,
materially impact the consolidated financial statements of Liberty.

                  (ix) Liberty will bear all costs and expenses incurred (A) by
the Liberty Persons in connection with the exercise of Liberty's rights pursuant
to this Section 2(e) and (B) by any auditors designated by Liberty to perform a
full audit of a Non-Complying Person pursuant to Section 2(e)(vii).

                  (x) At such time as any other Person to whom Liberty transfers
its voting or economic interest in United (in compliance with all of Liberty's
obligations under the Transaction Documents) becomes obligated to provide in
such Person's filings with the Commission financial disclosure regarding United
or is otherwise required to provide audited financial statements, such Person
will be entitled to all of the rights of Liberty under this Section 2(e).

                  (xi) Liberty will, and will cause its auditors to, provide the
representations required of a parent company and a parent company's auditors to
the auditors of United, if so requested in accordance with the Statement of
Auditing Standards promulgated by the American Institute of Certified Public
Accountants.

         Section 3. REPRESENTATIONS AND WARRANTIES.

         Each of the Liberty Parties, severally and not jointly, on the one
hand, and United, on the other, represent and warrant to each other as of the
date of this Agreement as follows:

         (a) Such party has the right, power, legal capacity and authority to
enter into and perform its obligations under this Agreement, and this Agreement
constitutes such party's valid and binding obligation, enforceable against it in
accordance with its terms, subject, as to enforceability, to applicable
bankruptcy, insolvency, fraudulent conveyance, reorganization, moratorium and
similar laws affecting creditor's rights and remedies generally, and to general
principles of equity, including principles of commercial reasonableness, good
faith and fair dealing (regardless of whether enforcement is sought in a
proceeding at law or in equity).

         (b) Such party has obtained all authorizations, permits, approvals or
consents of any Persons, as well as all authorizations, permits, approvals or
consents of any Governmental Authorities, necessary to enter into and perform
such party's obligations under this Agreement, except as would not, individually
or in the aggregate, adversely affect such party's ability to perform its
obligations under this Agreement.

         (c) This Agreement and the transactions it contemplates do not conflict
with any applicable law or any agreement to which such party is a party or
constitute a default under any such agreement, except as would not, individually
or in the aggregate, adversely affect such party's ability to perform its
obligations under this Agreement.

         Section 4. TERM AND TERMINATION. This Agreement shall terminate upon
the termination of the Stockholders Agreement.

                                       9

<Page>

         Section 5. REMEDIES. Each of the parties acknowledges and agrees that
in the event of any breach of this Agreement, the nonbreaching party would be
irreparably harmed and could not be made whole by monetary damages. Accordingly,
the parties to this Agreement, in addition to any other remedy to which they may
be entitled hereunder or at law or in equity, shall be entitled to compel
specific performance of this Agreement.

         Section 6. NOTICES. All notices, requests, demands and other
communications required or permitted under this Agreement shall be in writing,
shall be deemed to have been duly given when delivered personally or, sent by
telecopy, or recognized service providing for guaranteed delivery, addressed as
follows:

         (a) If to United, to:

                           UnitedGlobalCom, Inc.
                           4643 South Ulster Street
                           Suite 1300
                           Denver, Colorado  80237
                           Attention: President
                           Fax: (303) 770-4207

                  with copies to:

                           UnitedGlobalCom, Inc.
                           4643 South Ulster Street
                           Suite 1300
                           Denver, Colorado  80237
                           Attention: General Counsel
                           Fax: (303) 770-4207

                  and

                           Holme Roberts & Owen LLP
                           1700 Lincoln Street
                           Suite 4100
                           Denver, Colorado  80203
                           Attention: W. Dean Salter, Esq.
                           Fax: (303) 866-0200

         (b) If to the Liberty Parties, to:

                           Liberty Media Corporation
                           12300 Liberty Blvd.
                           Englewood, Colorado  80112
                           Attention: President
                           Fax: (720) 875-5382

                                       10

<Page>

                  with copies to:

                           Liberty Media Corporation
                           12300 Liberty Blvd.
                           Englewood, Colorado 80112
                           Attention: Elizabeth M. Markowski, Esq.
                           Fax: (720) 875-5858

                  and

                           Baker Botts L.L.P.
                           599 Lexington Avenue
                           New York, New York  10022
                           Attention: Robert W. Murray Jr., Esq.
                           Fax: (212) 705-5125

or to such other person or address or addresses as Liberty or United shall
specify by notice in accordance with this Section 6. Liberty shall be
responsible for distributing any notices it receives to the Liberty Parties, as
necessary. All notices, requests, demands, waivers and communications shall be
deemed to have been given on the date of delivery or on the first Business Day
after overnight delivery was guaranteed by a recognized delivery service, except
that any change of address shall be effective only upon actual receipt. Written
notice given by telecopy shall be deemed effective when confirmation is received
by the sending party. Delivery shall be deemed to have been made to each Liberty
Party on the date that delivery is made to Liberty at the address specified
above (as it may be changed as provided herein).

         Section 7. ENTIRE AGREEMENT. This Agreement, together with the other
Transaction Agreements and the Merger Agreement, contains all the terms and
conditions agreed upon by the parties hereto with respect to the subject matter
hereof, and no other agreements, oral or otherwise, regarding the subject matter
hereof shall have any effect unless in writing and executed by the parties after
the date of this Agreement.

         Section 8. APPLICABLE LAW, JURISDICTION; WAIVER OF JURY TRIAL. This
Agreement shall be governed by Colorado law without regard to conflicts of law
rules. The parties hereby irrevocably submit to the jurisdiction of any Colorado
State or United States Federal court sitting in Colorado, and only a State or
Federal Court sitting in Colorado will have any jurisdiction over any action or
proceeding arising out of or relating to this Agreement or any agreement
contemplated hereby, and the undersigned hereby irrevocably agree that all
claims in respect of such action or proceeding shall be heard and determined in
such State or Federal court. The undersigned further waive any objection to
venue in such State and any objection to any action or proceeding in such State
on the basis of a non-convenient forum. Each party hereby IRREVOCABLY WAIVES ANY
RIGHT TO A TRIAL BY JURY in any proceeding brought with respect to this
Agreement or the transactions contemplated hereby.

         Section 9. HEADINGS. The headings in this Agreement are for convenience
only and are not to be considered in interpreting this Agreement.

                                       11

<Page>

         Section 10. COUNTERPART EXECUTION. This Agreement may be executed in
any number of counterparts, each of which shall be deemed an original but all of
which will constitute a single agreement.

         Section 11. PARTIES IN INTEREST. Except as provided in Section 2(e)
nothing in this Agreement, express or implied, is intended to confer upon any
Person other than the parties hereto, their Permitted Transferees, in the case
of the Liberty Parties, and their permitted successors and assigns, any
benefits, rights or remedies. Neither this Agreement nor the rights or
obligations of any party may be assigned or delegated (other than, in the case
of a Liberty Party, to a Permitted Transferee) by operation of law or otherwise
without the prior written consent of Liberty and United. Notwithstanding the
foregoing, any Person that succeeds to Liberty's rights and obligations under
the Stockholders Agreement and the Standstill Agreement shall be entitled, as an
express third party beneficiary, to all of the rights of Liberty hereunder to
the same extent as if all references to Liberty herein referred to such Person.

         Section 12. SEVERABILITY. The invalidity or unenforceability of any
provision of this Agreement in any application shall not affect the validity or
enforceability of such provision in any other application or the validity or
enforceability of any other provision.

         Section 13. WAIVERS AND AMENDMENTS. No waiver of any provision of this
Agreement shall be deemed a further or continuing waiver of that provision or a
waiver of any other provision of this Agreement. This Agreement may not be
amended except in a writing signed by Liberty and United.

         Section 14. INTERPRETATION. As used herein, except as otherwise
indicated herein or as the context may otherwise require, the words "include,"
"includes" and "including" are deemed to be followed by "without limitation"
whether or not they are in fact followed by such words or words of like import;
the words "hereof," "herein," "hereunder" and comparable terms refer to the
entirety of this Agreement and not to any particular article, section or other
subdivision hereof; any pronoun shall include the corresponding masculine,
feminine and neuter forms; the singular includes the plural and vice versa;
references to any agreement or other document are to such agreement or document
as amended and supplemented from time to time; references to any statute or
regulation are to it as amended and supplemented from time to time, and to any
corresponding provisions of successor statutes or regulations; references to
"Article," "Section" or another subdivision are to an article, section or
subdivision hereof; and all references to "the date hereof," "the date of this
Agreement" or similar terms (but excluding references to the date of execution
hereof) refer to the date first above written, notwithstanding that the parties
may have executed this Agreement on a later date. Any reference herein to a
"day" or number of "days" (without the explicit qualification of "Business")
shall be deemed to refer to a calendar day or number of calendar days. If any
action or notice is to be taken or given on or by a particular calendar day, and
such calendar day is not a Business Day, then such action or notice may be taken
or given on the next succeeding Business Day.

         Section 15. RULES OF CONSTRUCTION. The parties hereto agree that they
have been represented by counsel during the negotiation, preparation and
execution of this Agreement and, therefore, waive the application of any law,
regulation, holding or rule of construction providing

                                       12

<Page>

that ambiguities in an agreement or other document will be construed against the
party drafting such agreement or document.

                            [Signature Pages Follow]

                                       13

<Page>

Executed as of the date first set forth above.

                                UNITEDGLOBALCOM, INC.,
                                a Delaware corporation

                                By: /s/ MICHAEL T. FRIES
                                   ---------------------------
                                   Michael T. Fries
                                   President

                                LIBERTY MEDIA CORPORATION,
                                a Delaware corporation

                                By: /s/ ELIZABETH M. MARKOWSKI
                                   ---------------------------
                                   Elizabeth M. Markowski
                                   Senior Vice President

                                LIBERTY GLOBAL, INC.,
                                a Delaware corporation

                                By: /s/ ELIZABETH M. MARKOWSKI
                                   ---------------------------
                                   Elizabeth M. Markowski
                                   Senior Vice President

                                LIBERTY UCOMA, LLC,
                                a Delaware limited liability company

                                By: /s/ ELIZABETH M. MARKOWSKI
                                   ---------------------------
                                   Elizabeth M. Markowski
                                   Senior Vice President

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