Document:

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                                                                  EXHIBIT 10.28

FORM

THIS NOTE WAS ORIGINALLY ISSUED EFFECTIVE AS OF MAY 16, 2002 PURSUANT TO PAYMENT
OBLIGATIONS UNDER EACH OF THE NACS CONTRACT AND THE FWACS CONTRACT (AS SUCH
TERMS ARE HEREINAFTER DEFINED) AND AN ORDER OF THE UNITED STATES BANKRUPTCY
COURT FOR THE SOUTHERN DISTRICT OF NEW YORK IN CASE NOS. 02-11732 THROUGH
02-11736 AND 02-11975 THROUGH 02-11979.

                   Senior Secured Note Due September 30, 2005

                                                                October __, 2002

     FLAG Asia Limited, a company organized and existing under the laws of
Bermuda (the "DEBTOR/PAYOR"), for value received, hereby promises to pay to the
order of xxxx ("XXXX", and any of its successors and permitted assigns, being
referred to herein as the "HOLDER"), the principal amount of Twenty-Seven
Million Three Hundred Fifty-Two Thousand Four Hundred and Sixty-One Dollars
U.S.$27,352,461 (the "PRINCIPAL AMOUNT"), together with interest thereon
calculated from May 16, 2002 (the "DATE OF ISSUANCE"), in accordance with the
provisions of this Senior Secured Note (this "NOTE").

     Except as otherwise indicated herein, capitalized terms used in this Note
have the meanings set forth in SECTION 10 hereof.

     1.   PAYMENT OF PRINCIPAL AND INTEREST.

          (a) The Debtor/Payor shall pay to the Holder (i) U.S.$6,000,000 of the
outstanding Principal Amount of this Note on the 30th day of September, 2003;
(ii) U.S.$6,923,654 of the outstanding Principal Amount of this Note on the 30th
day of September, 2004; and (iii) U.S.$14,428,807 of the outstanding Principal
Amount of this Note, on the 30th day of September 2005 (the "MATURITY"). This
Note may be declared due prior to the expressed maturity dates and the time that
prepayment is required to be made thereon, in each such case, all in the events,
on the terms and in the manner and amounts as provided in SECTION 2 and
SECTION 8 hereof. Unless prohibited under applicable law, the Debtor/Payor
agrees to pay interest on overdue principal and (to the extent legally
enforceable) on any overdue installment of interest, at the Overdue Rate per
annum from the date such payment is due, whether by acceleration or otherwise,
until such overdue installment is paid.

          (b) The Debtor/Payor shall pay interest to the Holder quarterly in
arrears, on March 31, June 30, September 30 and December 31 of each year.
Interest shall accrue from the most recent date on which interest has been paid
or, if no interest has been paid, from the Date of Issuance, at a per annum
interest rate of seven (7%) percent computed on the basis of a 360-day year and
the actual number of days elapsed in any year on the outstanding Principal
Amount from and including the Date of Issuance hereof until the date paid.
Notwithstanding anything herein to the contrary, the first such payment of
interest shall include only such interest as has

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accrued from the Date of Issuance to September 30, 2002 and shall be paid on the
earlier to occur of (x) the Effective Date and (y) November 15, 2002.

     2.   PREPAYMENT.

          (a) NO PREPAYMENTS. No prepayment of this Note may be made except to
the extent and in the manner set forth in this SECTION 2 or in SECTION 8 hereof;

          (b) OPTIONAL REDEMPTION. The Debtor/Payor may without penalty or
premium, at its option, at any time, and from time to time, in whole or in part,
upon five (5) Business Days' prior written notice to the Holder, prepay any
outstanding Principal Amount, plus any and all accrued and unpaid interest
thereon to the date of such prepayment;

          (c) MANDATORY PREPAYMENT. The Debtor/Payor shall be required to prepay
all outstanding principal and accrued and unpaid interest on this Note upon the
occurrence of a Change of Control of the Debtor/Payor. In addition, the
Debtor/Payor shall be required to apply insurance settlement proceeds from
casualty losses to the Collateral (as such term is defined in the FNAL Security
Agreement) unless such proceeds are reinvested in like assets pursuant to bona
fide contracts executed within 120 days from the receipt thereof, to the
outstanding principal of this Note and any accrued and unpaid interest thereon
on a pro rata basis.

          (d) [Intentionally Omitted.]

     3.   CANCELLATION. Upon the date on which all of the Principal Amount,
accrued interest thereon, and all other amounts at any time owed on this Note
have been paid in full, this Note shall be surrendered to the Debtor/Payor for
cancellation.

     4.   PAYMENT.

          (a) PLACE OF PAYMENT. Payments of principal, interest and other
amounts shall be made by wire transfer of immediately available funds to the
following account of the Holder hereof:

                    Swift Code:   ABNAUS33
                    Account No.   02600-9580/456060422441
                    Account Name: xxx

or to such other account or to the attention of such other Person as specified
by prior written notice to the Debtor/Payor delivered at least five (5) Business
Days prior to the next scheduled payment date.

          (b) WITHHOLDING TAX. If the Debtor/Payor shall be required by law to
deduct any Taxes, other than Excluded Taxes, from or in respect of any interest
payment hereunder to the Holder, (i) the amount of such payment shall be
increased as may be necessary so that after the Debtor/Payor has made all
required deductions the Holder receives an amount equal to the sum it would have
received had no such deductions, other than deductions for Excluded Taxes, been
made and (ii) the Debtor/Payor shall make all such deductions, other than
deductions for

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Excluded Taxes, and pay the full amount deducted to the relevant taxation
authority or other authority in accordance with applicable law.

     5.   SECURITY INTEREST. The provisions of the FNAL Security Agreement will
be effective to create in favor of the Collateral Agent, commencing on the Date
of Issuance and continuing for so long as any amounts under this Note remain
outstanding, a Security Interest in the Collateral. Commencing no later than
October 15, 2002, the Debtor/Payor and its Related Operating Companies shall
take all actions to the maximum extent permitted by applicable law (the
"PERFECTION ACTIONS") reasonably necessary to ensure the legality,
enforceability, validity and perfection of such Security Interest on the
Collateral and will continue to take such action as is necessary so as to
maintain the legality, enforceability, and validity of such Security Interest
for so long as any portion of this Note remains outstanding; PROVIDED, HOWEVER,
in the event such Security Interest is not perfected by December 31, 2002, it
shall be an Event of Default for all purposes hereunder. Notwithstanding
anything in this SECTION 5 to the contrary, with respect to any Perfection
Actions to be taken by the Debtor/Payor and its Related Operating Companies in
South Korea, Debtor/Payor shall only be required to use their respective best
commercially reasonable efforts to effect the Perfection Actions no later than
March 31, 2003 and shall keep the Collateral Agent and the Holder reasonably
informed as to its progress with respect thereto. All capitalized terms used in
this SECTION 5 and not defined in this Note shall have the meanings ascribed
thereto in the FNAL Security Agreement.

     6.   COVENANTS. So long as any amount remains unpaid on this Note, but
subject to the limitations imposed by the Existing Cases and certain insolvency
proceedings in Bermuda and the resultant fact that their activities are subject
to approval of the United States Bankruptcy Court and the Supreme Court of
Bermuda and the supervision and oversight of the applicable joint provisional
liquidators; PROVIDED, HOWEVER, that the foregoing limitations shall cease to be
applicable on and after the earlier to occur of (i) the Plan Effective Date and
(ii) October 31, 2002:

          (a) CORPORATE EXISTENCE; PROPERTIES; INSURANCE. The Debtor/Payor
shall, and shall cause each of its Related Operating Companies to, except as
otherwise permitted pursuant to this Note and would not materially impair the
Debtor/Payor's ability to pay this Note: (i) cause to be done all things
necessary to maintain, preserve and renew its existence; (ii) conduct its
respective activity in the Business substantially as now conducted; (iii)
maintain all assets (other than assets no longer used in the conduct of its
respective activity in the Business) in good repair, working order, and
condition, ordinary wear and tear excepted, and from time to time make all
necessary repairs, renewals and replacements so that its respective Business may
be properly and advantageously conducted in all material respects at all times;
(iv) maintain accurate records and books of account that present fairly its
financial condition and results of operation and make provisions on its
financial statements for all such proper reserves as in each case are required
consistent with GAAP consistently applied throughout all accounting periods; and
(v) apply for and maintain adequate insurance of such nature and in such amounts
as is required to be effected under Section 13 of the Submarine Cable System
Development Agreement (but in no event less than such amounts that were
maintained as of the Date of Issuance). Notwithstanding anything in this
SECTION 6(a) to the contrary, Debtor/Payor may undertake to consummate a
Corporate Reorganization; provided, that (x) Debtor/Payor shall have given
Holder not less than 30 days written notice prior to the proposed consummation
of any such Corporate Reorganization, such

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notice to include all pertinent details with respect to such Corporate
Reorganization, (y) Holder shall have given its written consent to the proposed
Corporate Reorganization (such consent to be given within five (5) Business Days
of its receipt of notice from the Debtor/Payor) (it being understood and agreed
that no such consent shall be given if Holder shall have determined that the
proposed Corporate Reorganization may reasonably be expected to impair (A) the
Debtor/Payor's ability to pay this Note or (B) the Collateral Agent's rights
with respect to the Collateral) and (z) if Holder shall consent to any such
proposed Corporate Reorganization, Debtor/Payor shall have taken all action
necessary and appropriate to maintain the Collateral Agent's interest in the
Collateral.

          (b) LICENSES. The Debtor/Payor shall, and shall cause each Related
Operating Company to, maintain in good standing and in full force and effect
each license, permit, and franchise granted or issued by any federal, state, or
local governmental agency or regulatory authority that is necessary for the
Debtor/Payor's or any of its Related Operating Companies' conduct of their
respective activities in the Business unless the failure to do so would not have
a Material Adverse Effect.

          (c) FINANCIAL INFORMATION. The Debtor/Payor shall furnish to the
Holder:

              (i)    as soon as available, and in any event within forty-five
     (45) days after the end of each quarter in each of the Debtor/Payor's
     fiscal years, the Debtor/Payor's and each of its Subsidiaries, (on an
     unconsolidated basis) unaudited balance sheet and income statement with
     respect to such quarter, setting forth in each case in comparative form the
     figures as of the end of the corresponding period or periods in the
     previous year;

              (ii)   within ten (10) days after transmission thereof, copies of
     any financial statements, proxy statements, reports and any other general
     written communications which the Debtor/Payor sends to its securityholders
     and copies of any registration statements and any regular, special or
     periodic reports which it files, or any of its officers or directors file
     with respect to the Debtor/Payor, with the Securities and Exchange
     Commission or with any securities exchange on which any of its securities
     are then listed (if any), copies of any press releases and other statements
     made available generally by the Debtor/Payor to the public concerning
     material developments in the Debtor/Payor's and its Subsidiaries'
     respective activities in the Business (it being acknowledged and agreed
     that Debtor/Payor does not intend to make any such public filings);

              (iii)  at the time of the delivery of the financial statements
     provided for in SECTION 6(c)(ii) at any other time reasonably requested by
     Holder, a certificate of the chief financial officer of Debtor/Payor to the
     effect that no Event of Default exists or, if any Event of Default does
     exist, specifying the nature and extent thereof, which certificate shall
     set forth the calculations required to establish whether the Debtor/Payor
     and its Subsidiaries were in compliance with the provisions of
     SECTION 6(h)(viii) as at the end of such fiscal year, fiscal quarter or
     other period requested by Holder, as the case may be;

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              (iv)   if the Debtor/Payor pursuant to its by-laws or applicable
     law prepares audited financial statements, a copy thereof within ten (10)
     days after the preparation thereof; and

              (v)    such other information or documents (financial or
     otherwise) as the Holder may reasonably request from time to time.

Each of the financial statements referred to in SUBSECTIONS (i) and (ii) above
shall fairly present in all material respects as of the dates and for the
periods stated therein the financial condition and the results of operations of
the Debtor/Payor and its Subsidiaries, which financial statements shall be
accompanied by a certificate of the chief financial officer of the Debtor/Payor
to the foregoing effect.

          (d) TAXES. The Debtor/Payor shall, and shall cause each Related
Operating Company to, pay and discharge when payable all Taxes, assessments and
governmental charges imposed upon its properties or upon its income or profits
(in each case before the same becomes delinquent and before the date on which
penalties attach thereto) and all claims for labor, materials or supplies that
if unpaid would become a Lien upon any of its property, unless and to the extent
that the same are being contested in good faith and by proper proceedings or
against which adequate reserves (as consistent with GAAP and consistently
applied) have been established on the books with respect thereto and such
contest operates to suspend collection of the same.

          (e) COMPLIANCE WITH LAWS. The Debtor/Payor shall, and shall cause each
Related Operating Company to, comply with all laws, rules and regulations of all
governmental authorities applicable to such Person or any of its respective
assets or operations, other than such noncompliance that could not reasonably be
expected to have a Material Adverse Effect.

          (f) NOTICES OF AN EVENT OF DEFAULT. The Debtor/Payor shall as soon as
possible and in any event within five (5) Business Days after the discovery or
receipt of notice of the occurrence of any Event of Default, notify the Holder
in writing of such occurrence, accompanied by an Officers' Certificate setting
forth the details thereof and the action which is being taken or proposed to be
taken by the Debtor/Payor and the respective Related Operating Company, as
applicable, with respect thereto.

          (g) COLLATERAL AGENT EXPENSES. The Debtor/Payor shall pay the
Collateral Agent as and when due the fees and expenses set forth on SCHEDULE 1
attached hereto.

          (h) NEGATIVE COVENANTS. Except as otherwise expressly contemplated by
this Note or that certain Asset Sale Agreement, dated as of September 30, 2002
by and among the Debtor/Payor and FLAG Telecom Taiwan Limited (the "TAIWAN
AGREEMENT"), without the prior written consent of the Holder, so long as any
amount under this Note remains outstanding, the Debtor/Payor shall not, and
shall not permit any Related Operating Company at any time to:

              (i)    INDEBTEDNESS AND LIENS. Create, incur, assume, or suffer to
     be incurred or to exist, any Indebtedness other than Permitted Indebtedness
     or any Lien other than Permitted Liens on its or their property or assets,
     whether now owned or hereafter acquired, or upon any income or profits
     therefrom.

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              (ii)   RESTRICTED PAYMENTS. Directly or indirectly declare, pay or
     make any Distributions or redeem, purchase or make any payments with
     respect to any equity appreciation rights, phantom equity plans or similar
     rights or plans other than, so long as an Event of Default has not occurred
     and be continuing, Distributions by a Related Operating Company of the
     Debtor/Payor to the Debtor/Payor.

              (iii)  TRANSACTIONS WITH RELATED PARTIES. Enter into, amend,
     modify or supplement any agreement, transaction, commitment or arrangement
     with (x) any of its or any of its Affiliates' officers, directors,
     managers, members, employees, (y) any individual related by blood, marriage
     or adoption to any such individual or (z) any entity in which any Person
     referred to in the preceding clauses (x) or (y) owns a beneficial interest,
     except for (A) customary employment arrangements and benefit programs and
     (B) purchases, sales or leases of capacity, in any such case, on
     reasonable, commercial, arms' length terms.

              (iv)   CHANGE IN NATURE OF BUSINESS. Make any material change in
     the nature of its respective activity in the Business other than a
     Corporate Reorganization permitted pursuant to SECTION 6(a).

              (v)    INVESTMENTS. Make any Investment.

              (vi)   ACQUISITIONS. Consummate any Acquisition with any other
     Person or division of any other Person other than Holdco.

              (vii)  SALES OF ASSETS. Sell, lease, transfer or otherwise dispose
     of, or permit any of its Related Operating Companies to sell, lease,
     transfer or otherwise dispose of, any Collateral, or grant any option or
     other right to purchase, lease or otherwise acquire any Collateral, except
     such sales of inventory or providing telecommunications or network services
     in the ordinary course of the conduct of the Business.

              (viii) CAPITAL EXPENDITURES. Make any Capital Expenditure
     exceeding U.S.$5,000,000 in the aggregate in any fiscal year; PROVIDED,
     HOWEVER, that this SECTION 6(h)(viii) shall not be applicable to Flag
     Telecom Japan Limited or Flag Telecom Asia Limited.

              (ix)   ACCOUNTING CHANGES. Make or permit any change in accounting
     policies or reporting practices that are inconsistent with GAAP.

              (x)    CONDUCT OF BUSINESS WITHIN DEBTOR/PAYOR AND RELATED
     OPERATING COMPANIES. Credit more than 10% of the revenues properly
     allocable to the FNAL System to any Person other than the Debtor/Payor and
     the Related Operating Companies.

     7.   EVENTS OF DEFAULT. Any one or more of the following shall constitute
an "EVENT OF DEFAULT" as the term is used herein:

          (a) the Debtor/Payor fails to pay the full amount of the interest then
accrued on this Note or the full amount of any Principal Amount, or other
amounts payable under this

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Note, when the same has become due and payable (whether at Maturity or
otherwise) and either (i) such default shall continue for more than one (1)
Business Day with respect to any Principal Amount, (ii) such default shall
continue for more than ten (10) Business Days with respect to any payment
required pursuant to SECTION 6(g), or (iii) such default shall continue for more
than thirty (30) days (I.E., calendar days) with respect to any payment of
interest or other amount payable under this Note (except as otherwise provided
in the preceding clauses (i) or (ii)); or

          (b) the Debtor/Payor or any of its Related Operating Companies (i)
fails to pay when due (after taking into account any applicable grace period)
any amounts in excess of $1,000,000 (whether by upon scheduled payment, required
prepayment, required cash collection, acceleration, demand or otherwise) under
any indentures, loan agreements, notes or other instruments under which any
evidence of its respective Indebtedness has been or hereafter may be issued or
(ii) fails to comply with the terms, covenants or other provisions of any such
indenture, loan agreement, note or other instrument, if the effect of such
failure to comply is to accelerate or to permit the acceleration of the stated
maturity of such Indebtedness (whether or not actually accelerated) or (in the
case of demand obligations) results in demand for payment of such Indebtedness,
and, in either case, such Indebtedness exceeds $1,000,000; or

          (c) the Debtor/Payor fails to observe or perform any covenant or
agreement contained in SECTION 6(h) hereof other than SECTIONS 6(h)(i), (ii),
(iii), (v), (ix) and (x); or

          (d) the Debtor/Payor fails to observe or perform any other covenant of
this Note (including, without limitation, SECTIONS 6(h)(i), (ii), (iii), (v),
(ix) and (x)), the Loan Documents or any other instrument delivered pursuant
hereto or thereto if such failure is not remedied within thirty (30) days from
the time the Debtor/Payor (i) becomes aware of such failure or (ii) receives
notice of such failure from the Holder; or

          (e) a judgment in excess of U.S.$1,000,000 is rendered against the
Debtor/Payor or any of its Related Operating Companies and, within sixty (60)
days after entry thereof, such judgment is not discharged in full or execution
thereof stayed pending appeal, or within sixty (60) days after the expiration of
any such stay, such judgment is not discharged in full; or

          (f) the Debtor/Payor or any of its Related Operating Companies makes
an assignment for the benefit of creditors or admits in writing its inability to
pay its debts generally as they become due, in each case, after the Effective
Date; or

          (g) at any time after the Effective Date: (i) an order, judgment,
decree or injunction is entered adjudicating the Debtor/Payor or any of its
Related Operating Companies bankrupt or insolvent or requiring the dissolution
or split up of the Debtor/Payor or any of its Related Operating Companies or
preventing the Debtor/Payor or any of its Related Operating Companies from
conducting all or any part of its Business; or (ii) any order for relief with
respect to the Debtor/Payor or any of its Related Operating Companies is entered
under the Federal Bankruptcy Code; or (iii) the Debtor/Payor or any of its
Related Operating Companies petitions or applies to any tribunal for the
appointment of a custodian, trustee, receiver or liquidator of the Debtor/Payor
or any of its Related Operating Companies, or of any substantial part of the
assets of the Debtor/Payor or any of its Related Operating Companies, or
commences

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any proceeding relating to the Debtor/Payor or any of its Related Operating
Companies under any bankruptcy reorganization, arrangement, insolvency,
readjustment of debt, dissolution or liquidation or similar laws of any
jurisdiction now or hereafter in effect; or any such petition or application is
filed, or any such proceeding is commenced, against the Debtor/Payor or any of
its Related Operating Companies and either (x) the Debtor/Payor or any such
Related Operating Company by any act indicates its approval thereof, consent
thereto or acquiescence therein or (y) such petition, application or proceeding
is not dismissed within sixty (60) days; or

          (h) any of the Debtor/Payor's or any of its Related Operating
Companies' assets are attached, seized, subjected to a writ or distress warrant,
or are levied upon, or come within the possession of any receiver, trustee,
custodian or assignee for the benefit of creditors in connection with any
obligations or liabilities of the Debtor/Payor and its Related Operating
Companies in excess of U.S.$1,000,000 in the aggregate; or

          (i) this Note or any other Loan Document shall cease to be in full
force or effect or declared to be null and void by a court of competent
jurisdiction; or

          (j) the Holdco Guaranty shall cease to be in full force or effect or
declared to be null and void by a court of competent jurisdiction or Holdco
shall deny liability thereunder; PROVIDED that it shall not be an Event of
Default under this SUBSECTION (j) if this Note has been assumed by Holdco under
the Holdco Guaranty or the successor to Holdco under the Plan of Reorganization;
or

          (k) at any time after the Effective Date, a Change of Control shall
occur and the Debtor/Payor shall not have complied with the provisions of
SECTION 2(c) hereof; or

          (l) [Intentionally Omitted.]

          (m) a Plan of Reorganization is approved or confirmed for any of the
FLAG Debtors that is inconsistent with or impairs the ability of the
Debtor/Payor to pay this Note or to perform its obligations under the Loan
Documents; or

          (n) [Intentionally Omitted.]

          (o) the appointment of a Trustee for any of the FLAG Debtors; or

          (p) the conversion of any of the FLAG Debtors' cases to a case under
Chapter 7 of the Federal Bankruptcy Code.

     The foregoing shall constitute Events of Default whatever the reason or
cause for any such Event of Default and whether it is voluntary or involuntary
or is effected by operation of law or pursuant to any judgment, decree or order
of any court or any order, rule or regulation of any administrative or
governmental body.

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     8.   CONSEQUENCES OF EVENTS OF DEFAULT.

          (a) If any Event of Default has occurred and is continuing, then the
interest rate on this Note shall become the Overdue Rate to the extent permitted
by law. Any increase of the interest rate resulting from the operation of this
subparagraph shall terminate as of the close of business on the date on which no
Events of Default exist (subject to subsequent increases pursuant to this
subparagraph).

          (b) If an Event of Default of the type described in SECTION 7(f), (g),
(i), (j), (m), (o) OR (p) has occurred, then the aggregate outstanding Principal
Amount of this Note (together with all accrued interest thereon and all other
amounts due and payable with respect hereto) shall become immediately due and
payable without any action on the part of the Holder, and the Debtor/Payor shall
immediately pay to the Holder all amounts due and payable with respect to this
Note.

          (c) If an Event of Default (other than under SECTION 7(f), (g), (i),
(j), (m), (o) OR (p) has occurred and is continuing, then the Holder in its sole
discretion may declare all or any portion of the outstanding Principal Amount,
(together with all accrued interest thereon and all other amounts due and
payable with respect hereto) to be immediately due and payable and may demand
immediate payment of all or any portion of the outstanding Principal Amount,
(together with all accrued interest thereon and all other amounts then due and
payable). If the Holder demands immediate payment of all or any portion of this
Note, the Debtor/Payor shall immediately pay to the Holder all amounts due and
payable with respect to this Note.

     9.   NO OFFSETS; ETC. Debtor/Payor's obligation to pay all principal,
interest, fees and expenses payable under this Note and the other Loan Documents
shall be absolute and unconditional and shall not be affected by any
circumstance, including, without limitation, (i) any set-off, counterclaim,
recoupment, defense or other right which Debtor/Payor may have against Holder or
anyone else for any reason whatsoever (whether in connection with the
transactions contemplated hereby or any other transactions), (ii) any breach or
alleged breach by xxxx under the FWACS Contract, the NACS Contract or any
contract, agreement, undertaking or instrument entered into in connection
therewith or (iii) any other circumstance, happening, or event whatsoever,
whether or not unforeseen or similar to any of the foregoing.

     10.  DEFINITIONS. In addition to any terms defined elsewhere herein, the
terms hereinafter set forth when used herein shall have the following meanings,
and the following definitions shall be equally applicable to both the singular
and plural forms of any of the terms herein defined:

     "ACQUISITION" means an acquisition by purchase or otherwise by the
Debtor/Payor or any of its Related Operating Companies of all or substantially
all of the business, property, fixed assets or capital stock of any Person (or
any division of any Person) or the merger or consolidation of the Debtor/Payor
or any of its Related Operating Companies with any other Person in which the
Debtor/Payor or any of its Related Operating Companies is (i) the surviving
entity or (ii) is not the surviving entity and such transaction does not fall
within the meaning of a "Change of Control" as defined hereunder.

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     "AFFILIATE" of any particular Person means any other Person that directly
or indirectly through one or more intermediaries controls, or is controlled by,
or is under common control with, such particular Person. The term "control"
means the possession, directly or indirectly, of the power to direct or cause
the direction of the management and policies of a Person, whether through the
ownership of voting securities, by contract, or otherwise. A Person shall be
deemed to control a corporation if such Person possesses, directly or
indirectly, the power (i) to vote 10% or more of the securities having ordinary
voting power for the election of directors (or equivalent managers) of such
corporation or (ii) to direct or cause the direction of the management and
policies of such corporation, whether through the ownership of voting
securities, by contract or otherwise; PROVIDED, HOWEVER, that notwithstanding
any ownership of any securities of any Grantor, neither Secured Party nor any of
its Affiliates shall be deemed to be Affiliates of any Grantor.

     "BUSINESS" means the business of the FNAL System as carried on as of the
Date of Issuance and any complimentary or logical extensions of such business,
including, without limitation, any telecommunications or network services
business in any geographic location, but only to the extent permitted under this
Note.

     "BUSINESS DAY" means any day other than a Saturday, Sunday, or other day on
which banking institutions in any of New York, New York, London, England and
Paris, France are authorized or obligated to close.

     "CAPITAL EXPENDITURE" means any outlay of cash or Cash Equivalents to
acquire or improve any long term asset but does not include any outlay of cash
or Cash Equivalents on account of current operations and maintenance, repair or
replacement of any long-term asset.

     "CAPITAL LEASE OBLIGATIONS" means the amount of the liability reflecting
the aggregate discounted amount of future payments under all capital leases
calculated consistent with GAAP consistently applied and Statement of Financial
Accounting Standards No. 13.

     "CASH EQUIVALENTS" means any of the following: (i) readily marketable
direct obligations of the United States of America or any agency or
instrumentality thereof or obligations unconditionally guaranteed by the full
faith and credit of the United States of America; (ii) insured certificates of
deposit of or time deposits with any commercial bank that is a member of the
Federal Reserve System that issues (or the parent of which issues) commercial
paper rated as described in clause (iii) below, that is organized under the laws
of the United States of America or any state thereof and has combined capital
and surplus of at least $500,000,000; or (iii) commercial paper issued by any
corporation organized under the laws of any state of the United States of
America and rated at least "Prime-1" (or the then equivalent grade) by Moody's
Investor Service, Inc. or "A-1" (or the then equivalent grade) by Standard &
Poor's Corporation.

     "CASH PROCEEDS" means, with respect to any Asset Sale, the aggregate cash
payments (including any cash received by way of deferred payment pursuant to a
note receivable issued in connection with such Asset Sale, other than the
portion of such deferred payment constituting interest, but only as and when so
received) to the Debtor/Payor and/or any of its Related Operating Companies from
such Asset Sale.

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     "CHANGE OF CONTROL" means (i) any sale or issuance or series of sales or
issuances of the Debtor/Payor's capital stock by the Debtor/Payor or any holder
or holders thereof, or any merger, consolidation or other transaction involving
the Debtor/Payor, immediately after which Holdco no longer holds, directly or
indirectly through one or more entities, record and beneficial ownership of 100%
of the Debtor/Payor's outstanding capital stock; PROVIDED that any distribution
of the Debtor/Payor's capital stock to the sole stockholder of Holdco shall not
be deemed a change of control hereunder or (ii) any sale of all or substantially
all of the Debtor/Payor's and its Related Operating Companies' assets on a
consolidated basis.

     "COLLATERAL" shall have the meaning ascribed thereto in the FNAL Security
Agreement.

     "CORPORATE REORGANIZATION" means any merger, consolidation or other
corporate reorganization or restructuring between or among the Debtor/Payor
and/or any of its Affiliates.

     "DIRECT COMPETITOR" means, as of any such date of determination, any Person
principally engaged in substantially the same activities which constitute the
Business or whose controlled Affiliate is principally engaged in substantially
the same activities which constitute the Business and which provides services in
substantially the same geographic location as the Debtor/Payor or any Related
Operating Company on the Date of Issuance.

     "DISTRIBUTION" means any distribution by any Person with respect to its
capital stock (or similar equity security) whether in cash, securities or other
property, including in the form of the declaration or payment of any dividend or
the making of any payment on account of, or set apart assets for a sinking or
other analogous fund for, the purchase, redemption, defeasance, retirement or
other acquisition of, any capital stock (or similar equity security) of such
Person other than a distribution by the Debtor/Payor of any of the proceeds of
the Taiwan Agreement.

     "DOLLARS" and the "$" sign each means lawful currency of the United States
of America.

     "EFFECTIVE DATE" means the effective date of the Plan of Reorganization
approved with respect to the Existing Cases in accordance with the Federal
Bankruptcy Code.

     "ESCROW AGREEMENT" means that certain Operation and Maintenance Escrow
Agreement, dated October __, 2002, by and among Holdco, the Debtor/Payor, Reach
Cable Networks Limited, Reach Networks KK and The Bank of New York, as escrow
agent.

     "EVENT OF DEFAULT" shall have the meaning set forth in SECTION 7 hereof.

     "EXCLUDED TAXES" means any taxes imposed on or measured by the overall net
income (including a franchise or excise tax based on net income) of the Holder
or the Collateral Agent (as the term is defined in the FNAL Security Agreement)
by the jurisdiction in which it is incorporated, maintains its principal
executive office, conducts its activities, or in which its office for payment
hereunder is located.

     "FEDERAL BANKRUPTCY CODE" means Title 11 of the United States Code as
amended from time to time.

                                       11
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     "FLAG DEBTORS" means all debtors in Case Nos. 02-11732 through 02-11736 and
02-11975 through 02-11979 pending in the United States Bankruptcy Court for the
Southern District of New York (the "EXISTING CASES"), or any other debtor whose
case is procedurally consolidated with such cases.

     "FNAL FIBER PAIR" means one of the lit Debtor/Payor fiber pairs which forms
a continuous loop across the NACS and FWACS Systems connecting the Cable
Stations in Tong Fuk, Hong Kong, Wada, Japan, Pusan, Korea and Toucheng, Taiwan,
in accordance with the technical design specification of the FNAL System
(collectively, the "FIBER PAIR"), equipped with 4 + 1 wavelengths of initial
capacity and, including without limitation: (i) all associated in-line optical
components (e.g., amplifiers and filters) relevant to the Fiber Pair; (ii) the
SLTE at each Cable Station relating to the Fiber Pair, including, without
limitation, all components of the associated tributary equipment, including,
without limitation, 2 racks containing 4 tributary subracks, 4 racks containing
the common parts of the SLTEs, 1 rack containing the protection tributary
subrack and switching system, and all boards implemented in the racks, and all
engineering order wire relating solely to the Fiber Pair and corresponding to
any of the 2 Mbit/s channel inserted in the 10 Gbit/s signal for operation and
maintenance purposes.

     "FNAL SECURITY AGREEMENT" means the Security Agreement, dated October __,
2002, effective as of the Date of Issuance, among the Debtor/Payor, Wilmington
Trust, as Collateral Agent, and xxxx, as secured party, and the Grantors named
therein (as modified, amended or supplemented from time to time in accordance
with the terms thereof and hereof).

     "FNAL SETTLEMENT AGREEMENT" means that certain Settlement Agreement, dated
as of October __, 2002, by and among the FLAG Debtors, Reach Ltd., Reach Cable
Networks Limited, Reach Networks KK and xxxx

     "FNAL SYSTEM" means the multi-terabit intra-Asia submarine cable system
integrating the FWACS System and the NACS Systems including without limitation,
and as more fully set forth in the FWACS Contract, the NACS Contract and the
Submarine Cable System Development Agreement, the following elements: (i) the
NACS System, (ii) the FWACS System, (iii) any equipment, software, systems or
infrastructure necessary for the integration of the NACS System and the FWACS
System, as described more fully in, and contemplated by, Exhibit A of the
Submarine Cable System Development Agreement, (iv) any Network Operations Center
assets provided by the NACS Contract or the FWACS Contract, and (v) all upgrades
or contract variances made pursuant to the FWACS Contract or NACS Contract at
any time and from time to time.

     "FWACS CONTRACT" means that certain Amended and Restated Contract, dated as
of October __, 2002, between FLAG Asia Limited, xxxx, Reach Cable Networks
Limited and Reach Networks KK, for the FLAG West Asia Cable System.

     "FWACS SYSTEM" means the fiber optic cable system as contemplated by the
FWACS Contract, including without limitation, and as more fully set forth in the
FWACS Contract, (i) an undersea fiber optic cable system from Wada, Japan to
Pusan, Korea interlinked with an undersea fiber optic cable system from Pusan,
Korea to Tong Fuk (Hong Kong), China (ii) Cable Stations in Hong Kong, Korea and
Japan, and (iii) all related facilities in Hong Kong, Korea and

                                       12
<Page>

Japan, necessary for the landing of the submarine cable into the Cable Stations,
including, without limitation, (x) all directional bores, ducts and other bore
holes that connect the submarine cable to the relevant Cable Station and (y) all
beach manholes.

     "GAAP" means generally accepted accounting principles as promulgated by the
Financial Accounting Standards Board, as in effect from time to time.

     "GUARANTEE" means all obligations (other than endorsements in the ordinary
course of business of negotiable instruments for deposit or collection) of any
Person guaranteeing the payment or performance of any Indebtedness or other
obligation of, and any other arrangement whereby credit is extended (or
continued) to, any other Person (the "PRIMARY OBLIGOR") in any manner, whether
directly or indirectly, including, without limitation, all obligations incurred
through an agreement, contingent or otherwise, by such Person: (i) to pay for or
to purchase such Indebtedness or obligation or any property or assets
constituting security therefor, (ii) to advance or supply funds (a) for the
purchase or payment of such Indebtedness or obligation, (b) to maintain working
capital or other balance sheet condition or (c) otherwise to advance or make
available funds for the purchase or payment of such Indebtedness or obligation,
(iii) to lease property or to purchase securities or other property or services
primarily for the purpose of assuring the owner of such Indebtedness or
obligation of the ability of the primary obligor to make payment of such
Indebtedness or obligation or (iv) otherwise to assure the owner of the
Indebtedness or obligation of the primary obligor against loss in respect
thereof. For the purposes of all computations made under this Note, a Guaranty
in respect of any Indebtedness for borrowed money shall be deemed to be
Indebtedness equal to the principal amount of such Indebtedness for borrowed
money which has been guaranteed, and a Guaranty in respect of any other
obligation or liability or any dividend shall be deemed to be Indebtedness equal
to the maximum aggregate amount of such obligation, liability, or dividend.

     "HOLDCO" means FLAG Telecom Holdings Limited, a Bermuda company or its
successor under the Plan of Reorganization.

     "HOLDCO GUARANTY" means the Guaranty, dated as of October __, 2002,
effective as of the Date of Issuance, by Holdco in favor of xxxx (as modified,
amended or supplemented from time to time in accordance with the terms thereof).

     "INDEBTEDNESS" means at a particular time, without duplication, (i) any
indebtedness for borrowed money or issued in substitution for or exchange of
indebtedness for borrowed money, (ii) any indebtedness evidenced by any note,
bond, debenture or other debt instrument, (iii) any indebtedness for the
deferred purchase price of property or services with respect to which a Person
is liable, contingently or otherwise, as obligor or otherwise (other than trade
payables and other current liabilities incurred in the ordinary course of
business which are not more than ninety (90) days past due), (iv) any commitment
by which a Person assures a creditor against loss (including contingent
reimbursement obligations with respect to letters of credit), (v) any
obligations for which a Person is obligated pursuant to a Guarantee, (vi) any
Capital Lease Obligations with respect to which a Person is liable, contingently
or otherwise, as obligor, guarantor or otherwise, or with respect to which
obligations a Person assures a creditor against loss, (vii) any indebtedness
secured by a Lien on a Person's assets and (viii) net obligations

                                       13
<Page>

under hedging arrangements designed to protect a Person against fluctuations in
interest rates, currency exchange rates or commodity prices.

     "INDENTURE" means the Indenture, dated as of October __, 2002, among Flag
Telecom Group Limited, the guarantors named therein and The Bank of New York, as
Trustee.

     "INVESTMENT" means, with respect to any investment of a Person, any direct,
indirect or beneficial investment (other than Cash Equivalents), whether by
means of share purchase, loan, advance, extension of credit (other than accounts
receivable, notes receivable and trade credits arising in the ordinary course of
business), capital contribution or otherwise, in or to another Person, the
guaranty of any Indebtedness (other than the guaranty of Indebtedness pursuant
to the Indenture) of such other Person or the subordination of any claim against
such other Person to other Indebtedness of such other Person. The amount of any
Investment shall be the original cost of such Investment plus the cost of all
additions thereto, without any adjustment for increases or decreases in value,
or write-ups, write-downs or write-offs with respect to such Investment.

     "LANDING STATION AGREEMENT" means that certain Cable Station Agreement,
dated May 28, 2001, as amended by a letter agreement dated as of October __,
2002, by and between KT Corp., Level 3 Communications Holdings (Korea) Ltd. and
Debtor/Payor.

     "LIEN" means any mortgage, pledge, hypothecation, assignment for security
purposes, security interest, encumbrance, lien (statutory or otherwise), charge
or other restriction of any kind including any agreement to give any of the
foregoing, any conditional sale or other title retention agreement or lease in
the nature thereof, any sale of receivables with recourse against the
Debtor/Payor or any Grantor (as such term is defined in the FNAL Security
Agreement), any financing or similar statement or notice filed under the Uniform
Commercial Code as adopted and in effect in the relevant jurisdiction (or other
similar recording or notice statute, and any lease in the nature thereof) other
than to reflect ownership by a third party of property leased to the
Debtor/Payor or any of its Related Operating Companies under a lease which is
not in the nature of a conditional sale or title retention agreement.

     "LOAN DOCUMENTS" means this Note, the FNAL Security Agreement, the Holdco
Guaranty and each other agreement, instrument, document, undertaking or
certificate executed or delivered pursuant to any of the foregoing.

     "MATERIAL ADVERSE EFFECT" means a materially adverse effect on (a) the
financial condition, operating results, prospects, assets, liabilities,
operations, condition (financial or otherwise) or their respective activities in
the Business of the Debtor/Payor and its Related Operating Companies taken as a
whole or (b) the ability of the Debtor/Payor to pay this Note.

     "MATURITY" has the meaning set forth in SECTION 1(a) above.

     "NACS CONTRACT" means that certain Amended and Restated Construction
Contract, dated as of October __, 2002, between FLAG Asia Limited, xxxx, Fujitsu
Limited, Reach Cable Networks Limited and Reach Networks KK for the North Asia
Cable System.

                                       14
<Page>

     "NET CASH PROCEEDS" means, with respect to any Asset Sale, the Cash
Proceeds resulting therefrom net of (i) cash expenses of sale (including,
without limitation, brokerage fees, if any, transfer taxes and payment of
principal, premium and interest of Indebtedness other than this Note required to
be repaid as a result of such Asset Sale), (ii) all federal, state, local and
non-U.S. taxes to the extent payable as a direct consequence of any such Asset
Sale and (iii) deduction of reasonable amounts, determined in accordance with
GAAP, required to be provided by Debtor/Payor or any of its Related Operating
Companies as a reserve against any liabilities retained by the Debtor/Payor or
any such Related Operating Company associated with such assets after such Asset
Sale, including, without limitation, any indemnification, pension and other
post-employment benefit liabilities, workers compensation liabilities,
liabilities associated with retiree benefits and liabilities relating to
environmental matters, except and until such reserves are reversed, in which
case the amount of such reversal shall constitute Net Cash Proceeds.

     "OVERDUE RATE" means the interest rate set forth on this Note plus two
hundred (200) basis points.

     "PERMITTED INDEBTEDNESS" means, without duplication, (i) any Senior Debt,
(ii) trade payables and accruals of the Debtor/Payor and/or the Related
Operating Companies incurred in the ordinary course of business that are not
more than ninety (90) days overdue, unless (x) and to the extent that the same
are being contested in good faith, diligently and by appropriate proceedings and
adequate reserves (as determined in accordance with GAAP consistently applied)
have been established on its books with respect thereto or (y) payment
rescheduling of such trade payables and accruals made pursuant to the Plan of
Reorganization, (iii) any Indebtedness of the Debtor/Payor and/or the Related
Operating Companies for the deferred purchase price of property or services with
respect to which Debtor/Payor and/or any of the Related Operating Companies is
liable, contingently or otherwise, as obligor or otherwise, not to exceed
$1,000,000 at any time, (iv) Indebtedness of the Debtor/Payor and/or the Related
Operating Companies owed to an Affiliate; PROVIDED, that any such Indebtedness
is by its terms subordinated to this Note on the same terms as any Permitted
Subordinated Indebtedness, (v) a performance bond issued in favor of OFTA by
West LB, Hong Kong Branch and guaranteed by FLAG Telecom Asia Limited in the
amount of twenty eight million Hong Kong Dollars (HK$28,000,000), (vi) a bank
guarantee of FLAG Telecom Asia Limited on the obligation issued by Bank of
America (Asia) Ltd. in favor of The Center (66) Limited and Urban Renewal
Authority in the amount of eight hundred sixty-two thousand six hundred
seventy-one Hong Kong Dollars (HK$862,671) and (vii) any Permitted Subordinated
Indebtedness.

     "PERMITTED LIENS" means:

          (i)    tax Liens for taxes not yet due and payable or which are being
     contested in good faith by appropriate proceedings and for which adequate
     reserves have been established in accordance with GAAP consistently
     applied;

          (ii)   deposits or pledges made in connection with, or to secure
     payment of, utilities or similar services, workers' compensation,
     unemployment insurance, old age pensions or other social security
     obligations;

                                       15
<Page>

          (iii)  easements, rights-of-way, restrictions and other similar
     charges and encumbrances not interfering with the ordinary conduct of the
     business of the Debtor/Payor and its Related Operating Companies or
     materially detracting from the value of the assets of the Debtor/Payor and
     its Related Operating Companies;

          (iv)   Liens to secured Permitted Indebtedness described in clauses
     (iii) and (vi) of the definition thereof, PROVIDED, HOWEVER, that any Lien
     to secured Permitted Indebtedness described in such clause (vi) shall cease
     to be a Permitted Lien on and as of such date as the bank guaranty
     described in such clause (vi) is no longer outstanding;

          (v)    Liens incurred to secure the West LB Financing; PROVIDED,
     HOWEVER, that any such Liens shall cease to be Permitted Liens hereunder on
     and as of December 31, 2002; and

          (vi)   Liens incurred to secure Senior Debt.

     "PERMITTED SUBORDINATED INDEBTEDNESS" means Indebtedness which by its terms
is expressly subordinated to this Note and (i) which does not provide for any
scheduled cash interest payments prior to Maturity, (ii) which does not provide
for any scheduled payments of principal prior to the Maturity, (iii) which
cannot be accelerated, repurchased or redeemed prior to Maturity, (iv) which is
unsecured and (v) the subordination terms of which are otherwise satisfactory to
the Holder.

     "PERSON" means an individual, a partnership, a corporation, a limited
liability company, an association, a joint stock company, a trust, a joint
venture, an unincorporated organization, a governmental entity or any
department, agency or political subdivision thereof and any other entity.

     "PLAN OF REORGANIZATION" means a plan of reorganization filed pursuant to
Chapter 11 of the Federal Bankruptcy Code for any of the FLAG Debtors.

     "REACH" means Reach Ltd.

     "RELATED OPERATING COMPANY" means (i) Flag Telecom Asia Limited, Flag
Telecom Japan Limited and their respective successors and assigns, (ii) any
Subsidiaries of Debtor/Payor, Flag Telecom Asia Limited or Flag Telecom Japan
Limited and (iii) any other Person which owns any portion of the Collateral.

     "RELATED PARTY PERSON" means any Affiliate of Debtor/Payor (other than a
Related Operating Company) which received any Transferred Asset.

     "SECURITIES AND EXCHANGE COMMISSION" means the Securities and Exchange
Commission and any governmental body or agency succeeding to the functions
thereof.

     "SENIOR DEBT" means, as of the date of determination, the (i) outstanding
Principal Amount under this Note and (ii) the principal amount outstanding under
the Indebtedness incurred pursuant to the Indenture.

                                       16
<Page>

     "SETTLEMENT AGREEMENT" means that certain Settlement Agreement, dated as of
October __, 2002, and effective as of May 16, 2002, by and among (i) all of the
Debtors, including without limitation FLAG Telecom Holdings Limited and FLAG
Asia Limited, (ii) Reach, Ltd., Reach Cable Networks Limited and Reach Networks,
and (iii) xxxx.

     "SUBMARINE CABLE SYSTEM DEVELOPMENT AGREEMENT" means the agreement dated as
of December 29, 2000, as amended and restated as of May 16, 2002, by and among
the Debtor/Payor, Reach Cable Networks Limited and Reach Networks KK, as amended
from time to time.

     "SUBSIDIARY" means, with respect to any Person, any corporation, limited
liability company, partnership, association or other business entity of that
Person (i) if a corporation, a majority of the total voting power of shares of
stock entitled (without regard to the occurrence of any contingency) to vote in
the election of directors, managers or trustees thereof is at the time owned or
controlled, directly or indirectly, by that Person or one or more of the other
Subsidiaries of that Person or a combination thereof, or (ii) if a limited
liability company, partnership, association or other business entity, a majority
of the partnership or other similar ownership interest thereof is at the time
owned or controlled, directly or indirectly, by that Person or one or more
Subsidiaries of that Person or a combination thereof. For purposes hereof, a
Person or Persons shall be deemed to have a majority ownership interest in a
limited liability company, partnership, association or other business entity if
such Person or Persons shall be allocated a majority of limited liability
company, partnership, association or other business entity gains or losses or
shall be or control (or have the power to be or control) a managing director,
manager or general partner of such limited liability company, partnership,
association or other business entity; PROVIDED, HOWEVER, that for the purposes
of this Note, Flag Telecom Korea Limited shall not be deemed a Subsidiary of
Debtor/Payor.

     "TAX" or "TAXES" means any federal, state, county, local, foreign or other
income, gross receipts, ad valorem, franchise, profits, sales or use, transfer,
registration, excise, utility, environmental, communications, real or personal
property, capital stock, membership interest, license, payroll, wage or other
withholding, employment, social security, severance, stamp, occupation,
alternative or add-on minimum, estimated and other taxes of any kind whatsoever
(including deficiencies, penalties, additions to tax, and interest attributable
thereto) whether disputed or not.

     "TRUSTEE" means any trustee appointed under Sections 701, 702, 703 or 1104
of the Federal Bankruptcy Code.

     "WEST LB FINANCING" means the $300,000,000 credit agreement dated as of
August 16, 2001 between the Debtor/Payor and WestLB AG, New York Branch
(formerly known as Westdeutsche Landesbank Girozentrale, New York Branch), The
Royal Bank of Scotland PLC, ING Bank, N.V., DekaBank Deutsche Girozentrale
(formerly known as DGC-Dekabank Deutche Kommunalbank), and KBC Finance Ireland.

     "WHOLLY-OWNED SUBSIDIARY" means, with respect to any Person, a Subsidiary
of which all of the outstanding capital stock or other ownership interests are
owned by such Person or another Wholly-Owned Subsidiary of such Person.

                                       17
<Page>

     11.  OTHER INTERPRETATIVE MATTERS. In this Note, unless a clear contrary
intention appears: (a) the singular number includes the plural number and vice
versa; (b) reference to any Person includes such Person's successors and
permitted assigns, and reference to a Person in a particular capacity excludes
such Person in any other capacity or individually; (c) reference to any gender
includes each other gender; (d) reference to any agreement, document or
instrument means such agreement, document or instrument as amended or modified
and in effect from time to time in accordance with the terms thereof and, if
applicable, the terms hereof (and without giving effect to any amendment or
modification that would not be permitted in accordance with the terms hereof);
(e) reference to any applicable law means such applicable law as amended,
modified, codified or reenacted, in whole or in part, and in effect from time to
time, including rules and regulations promulgated thereunder and reference to
any particular provision of any applicable law shall be interpreted to include
any revision of or successor to that provision regardless of how numbered or
classified; (f) "hereunder," "hereof," "hereto" and words of similar import
shall be deemed references to this Note as a whole and not to any particular
Section or other provision hereof; (g) "including" (and with correlative meaning
"include") means including without limiting the generality of any description
preceding such term; (h) relative to the determining of any period of time,
"from" means "from and including" and "to" and "through" means "to but
including"; (i) "or", "either" and "any" are not exclusive; (j) references to
any Subsidiary of a Person shall be given effect only at such times as such
Person has one or more Subsidiaries; and (k) references to "shares" or "stock"
shall include membership interests or other ownership interests.

     12.  BUSINESS DAYS. If any payment is due, or any time period for giving
notice or taking action expires, on a day which is not a Business Day, the
payment shall be due and payable on, and the time period shall automatically be
extended to, the next Business Day immediately following, and interest shall
continue to accrue at the required rate hereunder until any such payment is
made.

     13.  SUBMISSION TO JURISDICTION. Each of the Debtor/Payor and the Holder
submits to the non-exclusive jurisdiction of any state or federal court sitting
in New York, New York (including, without limitation, the United States
Bankruptcy Court for the Southern District of New York), in any action or
proceeding arising out of or relating to this Note and agrees that all claims in
respect of the action or proceeding may be heard and determined in any such
court. Each of the Debtor/Payor and the Holder waives any defense of
inconvenient forum to the maintenance of any action or proceeding brought in any
state or federal court sitting in New York, New York (including, without
limitation, the United States Bankruptcy Court for the Southern District of New
York) and waives any bond, surety, or other security that might be required of
any other party with respect thereto.

     14.  GOVERNING LAW. THIS NOTE AND ALL DISPUTES WITH RESPECT HERETO SHALL BE
GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK
(OTHER THAN CHOICE OF LAW RULES THAT WOULD REQUIRE THE APPLICATION OF THE LAWS
OF ANY OTHER JURISDICTION).

                                       18
<Page>

     15.  AMENDMENT. No amendment of any provision of this Note shall be
effective unless the same shall be in writing and signed by or on behalf of the
Debtor/Payor and the Holder.

     16.  COMPLETE AGREEMENT; THIRD-PARTY BENEFICIARIES. This Note, together
with the other Loan Documents, is intended by the parties as the final
expression of their agreement regarding the subject matter hereof and as a
complete and exclusive statement of the terms and conditions of such agreement.
There are no third-party beneficiaries of this Agreement, except that the
Collateral Agent (as such term is defined in the FNAL Security Agreement) is
expressly intended to be a third-party beneficiary of this Agreement.

     17.  ENGLISH LANGUAGE. Any translation of this Note into another language
shall have no interpretive effect. All documents or notices to be delivered
pursuant to or in connection with this Note shall be in the English language,
or, if any such document or notice is not in the English language, accompanied
by an English translation thereof, and the English language version of any such
document or notice shall control for purposes hereof.

     18.  USURY LAWS. It is the intention of the Debtor/Payor and the Holder of
this Note to conform strictly to all applicable usury laws now or hereafter in
force, and any interest payable under this Note shall be subject to reduction to
the amount not in excess of the maximum legal amount allowed under the
applicable usury laws as now or hereafter construed by the courts having
jurisdiction over such matters. If the maturity of this Note is accelerated by
reason of an election by the Holder hereof resulting from an Event of Default,
voluntary prepayment by the Debtor/Payor or otherwise, then earned interest may
never include more than the maximum amount permitted by law, computed from the
date hereof until payment, and any interest in excess of the maximum amount
permitted by law shall be canceled automatically and, if theretofore paid, shall
at the option of the Holder hereof either be rebated to the Debtor/Payor or
credited on the Principal Amount of this Note, or if this Note has been paid,
then the excess shall be rebated to the Debtor/Payor. The aggregate of all
interest (whether designated as interest, service charges, points or otherwise)
contracted for, chargeable, or receivable under this Note shall under no
circumstances exceed the maximum legal rate upon the unpaid principal balance of
this Note remaining unpaid from time to time. If such interest does exceed the
maximum legal rate, it shall be deemed a mistake and such excess shall be
canceled automatically and, if theretofore paid, rebated to the Debtor/Payor or
credited on the Principal Amount of this Note, or if this Note has been repaid,
then such excess shall be rebated to the Debtor/Payor.

     19.  REGISTER, FORM W-8. The Debtor/Payor shall keep at its principal
office a register in which the Debtor/Payor shall provide for the registration
of the Note and any replacements thereof. The Debtor/Payor may deem the Person
in whose name this Note shall be registered upon the registry books of the
Debtor/Payor to be, and may treat it as, the absolute owner of this Note
(whether or not this Note shall be overdue) for the purpose of receiving payment
of or on account of the amounts payable under this Note and for all other
purposes, and, the Debtor/Payor shall not be affected by any notice to the
contrary. All such payments shall be valid and effectual to satisfy and
discharge obligations of the Debtor/Payor regarding such sum or sums so paid.
This Note, when presented for registration of transfer or for exchange or
payment, shall (if so required by the Debtor/Payor) be duly endorsed by, or be
accompanied by a written instrument of transfer in form reasonably satisfactory
to the Debtor/Payor duly executed by, the

                                       19
<Page>

Holder or his attorney duly authorized in writing. The Holder shall provide to
the Debtor/Payor a duly completed and executed Internal Revenue Service form
W-8BEN certifying to the non-U.S. status of the Holder, upon the issuance of
this Note or the Holder becoming a Holder and thereafter upon the expiration of
any prior form W-8BEN delivered by the Holder to the Debtor/Payor.

     20.  TRANSFERABILITY AND ASSIGNMENT. This Note is freely marketable, and
the Holder of this Note may transfer, convey, assign or otherwise dispose of
this Note to any other Person ("PERMITTED ASSIGN"), PROVIDED that any transfer,
conveyance, assignment or other disposition of this Note by a Holder to a Direct
Competitor of Debtor/Payor shall require the written consent of Debtor/Payor,
such consent not to be unreasonably withheld or delayed. The Debtor/Payor may
not, without the prior written consent of the Holder which may, in the sole
discretion of the Holder, be withheld for any reason or no reason whatsoever,
transfer, convey, assign or otherwise dispose of this Note (or any of its
obligations hereunder), whether by operation of law or otherwise, to any other
Person. Notwithstanding anything herein to the contrary, it shall be a condition
to any assignment, transfer, participation or other disposition of all or any
part of a Holder's rights under this Note that, and no such assignment,
transfer, participation or other disposition shall be valid or effective unless,
such assignee, transferee or participant shall have first executed and delivered
to Reach a letter agreement accepting and agreeing to the quiet enjoyment,
assumption, right of first refusal and other rights and provisions set forth in
Section 6.4 of the Settlement Agreement. This Note will be binding upon and
inure to the benefit of the parties hereto and their respective successors and
permitted assigns, PROVIDED that no transfer, conveyance, assignment or other
disposition, whether by operation of law or otherwise, by the Holder shall be
effective for any purpose unless and until (i) such disposition is made in
accordance with the terms of this SECTION 20, and (ii) in the case of a
disposition by the Holder, the Debtor/Payor receives reasonably sufficient
notice of such transfer that the Debtor/Payor may make an appropriate entry
thereof in the register maintained by the Debtor/Payor.

     21.  EFFECTIVE DATE. Notwithstanding anything herein to the contrary, the
Debtor/Payor hereby acknowledges and agrees that this Note shall be effective
for all purposes, and shall be deemed to have been continuously in effect, on
and as of the Date of Issuance, PROVIDED, HOWEVER, that to the extent the
representations and warranties, covenants and other agreements contained herein
are apply to FLAG Telecom Taiwan, each shall be effective for all purposes on
and as of, and the covenants and other agreements shall be deemed to have been
continuously in effect from, September 30, 2002.

     22.  [INTENTIONALLY OMITTED.]

     23.  NOTICES. Every notice, demand, request, consent, approval, declaration
or other communication hereunder shall be in writing and shall be given or made
(i) by delivery in person, (ii) by a reputable international overnight courier
service or (iii) by telecopy to the respective parties at the following
addresses:

          (a)  if to Debtor/Payor:

               FLAG Asia Limited
               Cedar House

                                       20
<Page>

               41 Cedar Avenue
               Hamilton HM12 Bermuda
               Facsimile: (441) 296-0938
               Attention: General Counsel

               With a copy to:

               FLAG Telecom Limited
               9 South Street
               London W1K 2XA
               United Kingdom
               Facsimile: +44 207 317 0898
               Attention: General Counsel

               (b)  if to:
               xxxx

or at such other address as may be substituted by notice given as herein
provided. The giving of any notice required hereunder may be waived in writing
by the party entitled to receive such notice. Every notice, demand, request,
consent, approval, declaration or other communication hereunder shall be deemed
to have been validly served, given or delivered (x) upon transmission, when sent
by telecopy or other similar facsimile transmission (with such telecopy or
facsimile promptly confirmed by delivery of a copy by personal delivery or mail
as otherwise provided in this SECTION 23), (y) two (2) Business Days after
deposit with a reputable international overnight carrier with all charges
prepaid, or (z) when delivered, if hand delivered.

[THE REMAINDER OF THIS PAGE INTENTIONALLY LEFT BLANK. SIGNATURE PAGE FOLLOWS.]

                                       21
<Page>

     IN WITNESS WHEREOF, the Debtor/Payor has executed and delivered this Note
on October __, 2002.

                                             FLAG ASIA LIMITED

                                             ----------------------------------
                                             By: Kees van Ophem
                                             Title: Assistant Secretary

                                       22
<Page>

                                                                      SCHEDULE 1

                              FLAG TELECOM HOLDINGS

                                SCHEDULE OF FEES

                                    TO ACT AS

                                COLLATERAL AGENT

NOTE:

Subject to a legal and administrative review of the governing documents and
acceptable indemnification for our fees and expenses from a creditworthy entity.
Out of pocket expenses (including outside counsel's fees and expenses in
connection with the closing and in connection with any post-closing matters) are
additional and are billed separately within 30 days from closing. Wilmington
Trust requests that whenever possible, the Initial Fee and the first year's
Annual Administration Fee be paid on the closing date by wire transfer per the
following wire transfer instructions: Wilmington Trust Company, Wilmington,
Delaware; ABA No. 031100092; for credit to the account of Corporate Trust
Administration - Income Account; Account No. 9974-0 (Income); Attn: Irene
Lennon; Ref: Trustee Fees and Expenses for [transaction name]. Thereafter, the
Annual Administration Fee is due and payable annually in advance on each
anniversary of the closing date. Transaction Fees are due and payable annually
in arrears. All fees are non-refundable and will not be prorated in the event of
an early termination of the Trust. In the event that the transaction does not
close, Wilmington Trust reserves the right to be paid its Initial Fee. All fees
quoted are guaranteed for a period of 90 days.

                                       23
<Page>

                                                                      SCHEDULE 1

INITIAL CHARGE                                                       Waived

ANNUAL ADMINISTRATION FEE                                            $ 5,000.00

Covers acceptance of appointment as Collateral Agent including complete study of
drafts of Collateral Agreement and all supporting documents in connection
therewith, conferences until final Agreement is agreed upon, execution of final
Agreement and administrative duties in connection with the security provisions
of the Agreement.

<Table>
<S>                                                               <C>
Transaction Fees: (if applicable)

          a.  Purchase, sale, withdrawal, maturities
              calls and puts of domestic securities               $    15.00

          b.  Physical delivery of domestic securities            $    50.00

          c.  Purchase of Eurodollar certificate of deposit       $    65.00

          d.  Principal amortizing securities
              (per pool/per month)                                $    10.00

          e.  Wire charge (per transfer)
                 Outgoing*                                        $    25.00
                 Incoming*                                        $    10.00

Transfer or Re-registration Fee:                                  $    1,000

Termination Fee:                                                  To be determined**
</Table>

*Transfers made by associate banks may result in additional wire charges.

**Wilmington Trust reserves the right to charge a fee relating to the
termination of the Trust and the final distribution of the property held by the
trust; such fee to be determined at the time of termination based on fees then
charged in the industry.

AGREED TO & ACCEPTED:
                     ----------------------

DATE:
     --------------------------------------

                                       24<Page>

                                                                  EXHIBIT 10.29

FORM

                                    GUARANTY

          This GUARANTY, dated as of October __, 2002, by FLAG TELECOM HOLDINGS
LIMITED, a Bermuda corporation, and its permitted successors or assigns ("FLAG
HOLDCO", and with its permitted successors or assigns, "GUARANTOR"), and xxxx,
the holder of that certain Secured Note as hereinafter defined.

                              W I T N E S S E T H:

          WHEREAS, pursuant to that certain Senior Secured Note dated as of the
date hereof, issued by FLAG Asia Limited (the "DEBTOR/PAYOR"), in favor of xxxx
and its registered assigns (xxxx and any registered assigns being referred to
herein as "HOLDER") (including all annexes, exhibits and schedules thereto, as
from time to time amended, restated, supplemented or otherwise modified, the
"SECURED NOTE"), Debtor/Payor has agreed to unconditionally pay the amounts
specified therein; and

          WHEREAS, pursuant to that certain Security Agreement, dated as of the
date hereof, by the Debtor/Payor and the Grantors referred to therein, in favor
of Wilmington Trust Company ("COLLATERAL AGENT"), as collateral agent for the
benefit of itself and xxxx as the Secured Parties (including all exhibits and
schedules thereto, as from time to time amended, restated, supplemented or
otherwise modified, the "SECURITY AGREEMENT"), the Debtor/Payor and Grantors
have granted a Security Interest in the Collateral to secure the Secured
Obligations; and

          WHEREAS, Guarantor is the ultimate parent company of Debtor/Payor and
as such will derive direct and indirect economic benefits from the financial
accommodations provided by Holder to the Debtor/Payor; and

          WHEREAS, in order to induce Holder to accept the Secured Note and
enter into the other Loan Documents, Guarantor has agreed to guarantee payment
of the Secured Note;

          NOW, THEREFORE, in consideration of the premises and the covenants
hereinafter contained, it is agreed as follows:

1.   DEFINITIONS.

          All capitalized terms not specifically defined herein shall have the
meanings ascribed thereto in the Security Agreement. In addition, as used
herein:

          "BUSINESS" means the business of the Debtor/Payor and its Subsidiaries
(as hereinafter defined), and any complimentary or logical extensions of such
business, including, without limitation, any telecommunications or network
services business in any geographic location, but only to the extent permitted
under the Secured Note.

          "BUSINESS DAY" means any day other than a Saturday, Sunday, or other
day on which banking institutions in any of New York, New York, London, England,
and Paris, France are authorized or obligated to close.

<Page>

          "EXCLUDED TAXES" means any taxes imposed on or measured by the overall
net income (including a franchise or excise tax based on net income) of the
Holder or the Collateral Agent by the jurisdiction in which it is incorporated,
maintains its principal executive office, conducts its activities, or in which
its office for payment hereunder is located.

          "GAAP" means generally accepted accounting principles as promulgated
by the Financial Accounting Standards Board, as in effect from time to time.

          "GOVERNMENTAL AUTHORITY" means any United States or non-United States
federal, national, supranational, state, provincial, county, city, local or
similar government, governmental, regulatory or administrative authority,
agency, or commission or any court, tribunal, arbitrator, judicial or arbitral
body, or any subdivision of any of the foregoing.

          "GOVERNMENTAL ORDER" means any order, writ, judgment, injunction,
decree, stipulation, determination, administrative ruling or award entered by or
with any Governmental Authority (in each case whether preliminary or final).

          "GUARANTY" means this Guaranty, including all amendments,
modifications and supplements and any annexes, exhibits and schedules to any of
the foregoing, and shall refer to this Guaranty as the same may be in effect at
the time such reference becomes operative.

          "LAW" means any United States or non-United States federal, national,
supranational, state, provincial, county, city, local or similar constitution,
statute, law, ordinance, regulation, rule, code, order, requirement or rule of
law (including, without limitation, common law).

          "LIEN" means any mortgage, pledge, hypothecation, assignment for
security purposes, security interest, encumbrance, lien (statutory or
otherwise), charge or other restriction of any kind, including any agreement to
give any of the foregoing, any conditional sale or other title retention
agreement or lease in the nature thereof, any sale of receivables with recourse
against Guarantor, any financing or similar statement or notice filed under the
Uniform Commercial Code as adopted and in effect in the relevant jurisdiction
(or other similar recording or notice statute, and any lease in the nature
thereof) other than to reflect ownership by a third party of property leased to
the Debtor/Payor under a lease which is not in the nature of a conditional sale
or title retention agreement.

          "LOAN DOCUMENTS" means the Secured Note, the Security Agreement, this
Guaranty, and each other agreement, instrument, document, undertaking or
certificate executed or delivered pursuant to any of the foregoing.

          "PERSON" means an individual, a partnership, a corporation, a limited
liability company, an association, a joint stock company, a trust, a joint
venture, an unincorporated organization, a governmental entity or any
department, agency or political subdivision thereof and any other entity.

          "SECURITIES AND EXCHANGE COMMISSION" includes any governmental body or
agency succeeding to the functions thereof.

                                        2
<Page>

          "SUBSIDIARY" means, with respect to any Person, any corporation,
limited liability company, partnership, association or other business entity of
that Person (i) if a corporation, a majority of the total voting power of shares
of stock entitled (without regard to the occurrence of any contingency) to vote
in the election of directors, managers or trustees thereof is at the time owned
or controlled, directly or indirectly, by that Person or one or more of the
other Subsidiaries of that Person or a combination thereof, or (ii) if a limited
liability company, partnership, association or other business entity, a majority
of the partnership or other similar ownership interest thereof is at the time
owned or controlled, directly or indirectly, by that Person or one or more
Subsidiaries of that Person or a combination thereof. For purposes hereof, a
Person or Persons shall be deemed to have a majority ownership interest in a
limited liability company, partnership, association or other business entity if
such Person or Persons shall be allocated a majority of limited liability
company, partnership, association or other business entity gains or losses or
shall be or control (or have the power to be or control) a managing director,
manager or general partner of such limited liability company, partnership,
association or other business entity.

          "TAX" or "TAXES" means any federal, state, county, local, foreign or
other income, gross receipts, ad valorem, franchise, profits, sales or use,
transfer, registration, excise, utility, environmental, communications, real or
personal property, capital stock, membership interest, license, payroll, wage or
other withholding, employment, social security, severance, stamp, occupation,
alternative or add-on minimum, estimated and other taxes of any kind whatsoever
(including deficiencies, penalties, additions to tax, and interest attributable
thereto) whether disputed or not.

          "TERMINATION DATE" means the date on which all Secured Obligations are
indefeasibly paid in full, in cash, to Holder.

2.   THE GUARANTY.

          2.1    GUARANTY OF GUARANTEED OBLIGATIONS OF DEBTOR/PAYOR. The
Guarantor hereby unconditionally guarantees to the Collateral Agent and Holder,
and its respective successors, endorsees, transferees and assigns (but subject
to the proviso in SECTION 7.6 hereof), the prompt payment when due (whether at
stated maturity, by acceleration or otherwise) and performance of the Secured
Obligations (hereinafter, the "GUARANTEED OBLIGATIONS"). Guarantor agrees that
this Guaranty is a guaranty of payment and performance and not of collection,
and that its obligations under this Guaranty shall be primary, absolute and
unconditional, irrespective of, and unaffected by:

                 (a) the genuineness, validity, regularity, enforceability or
     any future amendment of, or change in this Guaranty, any other Loan
     Document or any other agreement, document or instrument to which
     Debtor/Payor and/or the Guarantor is or may become a party;

                 (b) the absence of any action to enforce this Guaranty or any
     other Loan Document or the waiver or consent by Holder with respect to any
     of the provisions thereof;

                                        3
<Page>

                 (c) the existence, value or condition of, or failure to perfect
     Holder's Lien against, any Collateral for the Guaranteed Obligations or any
     action, or the absence of any action by Holder in respect thereof
     (including, without limitation, the release of any such security);

                 (d) the insolvency of Debtor/Payor; or

                 (e) any other action or circumstances which might otherwise
     constitute a legal or equitable discharge or defense of a surety or
     guarantor;

it being agreed by the Guarantor that its obligations under this Guaranty shall
not be discharged until the Termination Date. The Guarantor shall be regarded,
and shall be in the same position, as principal debtor with respect to the
Guaranteed Obligations. The Guarantor agrees that any notice or directive given
at any time to Holder which is inconsistent with the waiver set forth in this
SECTION 2.1 shall be null and void and may be ignored by Holder and, in
addition, may not be pleaded or introduced as evidence in any litigation
relating to this Guaranty for the reason that such pleading or introduction
would be at variance with the written terms of this Guaranty, unless Holder has
specifically agreed otherwise in writing. It is agreed among the Guarantor and
Holder that the foregoing waivers are of the essence of the transaction
contemplated by the Loan Documents and that, but for this Guaranty and such
waivers, Holder would decline to enter into the Loan Documents.

          2.2    DEMAND BY HOLDER. In addition to the terms of the Guaranty set
forth in SECTION 2.1 hereof, and in no manner imposing any limitation on such
terms, it is expressly understood and agreed that if, at any time, the
outstanding principal amount of the Guaranteed Obligations under the Secured
Note (including all accrued interest thereon) is declared to be immediately due
and payable, then Guarantor shall, without demand, pay the entire outstanding
Guaranteed Obligations due and owing to Holder. Payment by Guarantor shall be
made to Holder in immediately available funds to an account designated by
Holder, at the address set forth herein for the giving of notice to Holder, or
at any other address that may be specified in writing from time to time by
Holder, and shall be credited and applied to the Guaranteed Obligations in
accordance with the Security Agreement.

          2.3    ENFORCEMENT OF GUARANTY. In no event shall Holder have any
obligation (although it is entitled, at its option) to proceed against
Debtor/Payor or any Collateral pledged to secure the Guaranteed Obligations
before seeking satisfaction from the Guarantor, and Holder may proceed, prior or
subsequent to, or simultaneously with, the enforcement of Holder's rights
hereunder, to exercise any right or remedy which it may have against any
Collateral, as a result of any Lien it may have as security for all or any
portion of the Guaranteed Obligations.

          2.4    WAIVER. In addition to the waivers set forth in SECTION 2.1
hereof, Guarantor waives, and agrees that it shall not at any time insist upon,
plead or in any manner whatsoever claim or take the benefit or advantage of, any
appraisal, valuation, stay, extension, marshaling of assets or redemption laws,
or exemption, whether now or at any time hereafter in force, which may delay,
prevent or otherwise affect the performance by Guarantor of its Guaranteed
Obligations under, or the enforcement by Holder of, this Guaranty. Guarantor
hereby waives diligence, presentment and demand (whether for non-payment or
protest or of

                                        4
<Page>

acceptance, maturity, extension of time, change in nature or form of the
Guaranteed Obligations, acceptance of further security, release of further
security, composition or agreement arrived at as to the amount of, or the terms
of, the Guaranteed Obligations, notice of adverse change in Debtor/Payor's
financial condition or any other fact which might increase the risk to
Guarantor) with respect to any of the Guaranteed Obligations or all other
demands whatsoever and waives the benefit of all provisions of law which are or
might be in conflict with the terms of this Guaranty. Guarantor represents,
warrants and agrees that, as of the date of this Guaranty, its obligations under
this Guaranty are not subject to any offsets or defenses against Holder.
Guarantor further agrees that its obligations under this Guaranty shall not be
subject to any counterclaims, offsets or defenses against Holder which may arise
in the future.

          2.5    BENEFIT OF GUARANTY. The provisions of this Guaranty are for
the benefit of Holder and its respective successors, transferees, endorsees and
assigns, and nothing contained herein shall impair the obligations of the
Debtor/Payor under the Loan Documents. In the event that all or any part of the
Guaranteed Obligations are transferred, endorsed or assigned by Holder to any
Person or Persons, any reference to "Holder" herein shall be deemed to refer
equally to such Person or Persons.

          2.6    MODIFICATION OF GUARANTEED OBLIGATIONS, ETC. Guarantor hereby
acknowledges and agrees that Holder (or Collateral Agent as circumstances may
require) may at any time or from time to time, with or without the consent of,
or notice to, Guarantor:

                 (a) [Intentionally omitted];

                 (b) take any action under or in respect of the Loan Documents
     in the exercise of any remedy, power or privilege contained therein or
     available to it at law, equity or otherwise, or waive or refrain from
     exercising any such remedies, powers or privileges;

                 (c) [Intentionally omitted];

                 (d) extend or waive the time for Debtor/Payor's performance of,
     or compliance with, any term, covenant or agreement on its part to be
     performed or observed under the Loan Documents, or waive such performance
     or compliance or consent to a failure of, or departure from, such
     performance or compliance;

                 (e) take and hold Collateral for the payment of the Guaranteed
     Obligations guaranteed hereby or sell, exchange, release, dispose of, or
     otherwise deal with, any property pledged, mortgaged or conveyed, or in
     which Collateral Agent has been granted a Security Interest for the benefit
     of Holder, to secure any Guaranteed Obligations;

                 (f) release anyone who may be liable in any manner for the
     payment of any amounts owed by Guarantor to Holder;

                 (g) modify or terminate the terms of any intercreditor or
     subordination agreement pursuant to which claims of other creditors of the
     Guarantor or Debtor/Payor are subordinated to the claims of Holder; and/or

                                        5
<Page>

                 (h) apply any sums by whomever paid or however realized to any
     amounts owing by the Guarantor to Holder in such manner as Holder shall
     determine in its discretion;

and Holder shall not incur any liability to Guarantor as a result thereof, and
no such action shall impair or release the Guaranteed Obligations of Guarantor
under this Guaranty.

Notwithstanding anything in this Guaranty to the contrary, Guarantor hereby
acknowledges and agrees that the obligations under this Guaranty shall remain in
full force and be unaffected by any change or extension of the manner, place or
terms of payment of, or renewal or alteration of all or any portion of, the
Guaranteed Obligations or any amendment, or modification, of any manner
whatsoever, of any Loan Document other than this Guaranty without regard to the
Guarantor's consent or failure to consent thereto (and without regard to any
notice or any lack of notice provided to Guarantor).

          2.7    REINSTATEMENT. This Guaranty shall remain in full force and
effect and should any petition hereafter be filed by or against Debtor/Payor or
Guarantor for liquidation or reorganization, should Debtor/Payor or Guarantor
hereafter become insolvent or make an assignment for the benefit of creditors or
should a receiver or trustee be appointed for all or any significant part of
Debtor/Payor's or Guarantor's assets. This Guaranty shall continue to be
effective or be reinstated, as the case may be, if at any time payment and
performance of the Guaranteed Obligations, or any part thereof, is, pursuant to
applicable law, rescinded or reduced in amount, or must otherwise be restored or
returned by Holder, whether as a "voidable preference", "fraudulent conveyance",
or otherwise, all as though such payment or performance had not been made. In
the event that any payment, or any part thereof, is rescinded, reduced, restored
or returned, the Guaranteed Obligations shall be reinstated and deemed reduced
only by such amount paid and not so rescinded, reduced, restored or returned.

          2.8    DEFERRAL OF SUBROGATION, ETC. Notwithstanding anything to the
contrary in this Guaranty, or in any other Loan Document, Guarantor hereby:

                 (a) expressly and irrevocably waives, on behalf of itself and
     its successors and assigns until the Termination Date, any and all rights
     at law or in equity to subrogation, to reimbursement, to exoneration, to
     contribution, to indemnification, to set off or to any other rights that
     could accrue to a surety against a principal, to a guarantor against a
     principal, to a guarantor against a maker or obligor, to an accommodation
     party against the party accommodated, to a holder or transferee against a
     maker, or to the holder of any claim against any Person, and which the
     Guarantor may have or hereafter acquire against Holder in connection with
     or as a result of such Guarantor's execution, delivery and/or performance
     of this Guaranty, or any other documents to which such Guarantor is a party
     or otherwise; and

                 (b) acknowledges and agrees (i) that this waiver is intended to
     benefit Holder and shall not limit or otherwise effect Guarantor's
     liability hereunder or the enforceability of this Guaranty, and (ii) that
     Holder and its respective successors and assigns are intended third party
     beneficiaries of the waivers and agreements set forth in

                                        6
<Page>

     this SECTION 2.8 and their rights under this SECTION 2.8 shall survive
     payment in full of the Guaranteed Obligations.

          2.9    ELECTION OF REMEDIES. If Holder or Collateral Agent may, under
applicable law, proceed to realize benefits under any of the Loan Documents
giving Holder or Collateral Agent a Lien upon any Collateral owned by
Debtor/Payor, either by judicial foreclosure or by non-judicial sale or
enforcement, Holder or Collateral Agent, as the case may be, may, at its sole
discretion, determine which of such rights or remedies it may pursue without
affecting any of such rights and remedies under this Guaranty. If, in the
exercise of any of its rights and remedies, Holder or Collateral Agent shall
forfeit any of their rights or remedies, including their right to enter a
deficiency judgment against Debtor/Payor, whether because of any applicable laws
pertaining to "election of remedies" or the like, Guarantor hereby consents to
such action by Holder or Collateral Agent and waives any claim based upon such
action, even if such action by Holder or Collateral Agent shall result in a full
or partial loss of any rights of subrogation which Guarantor might otherwise
have had but for such action by Holder or Collateral Agent. Any election of
remedies which results in the denial or impairment of the right of Holder or
Collateral Agent to seek a deficiency judgment against any Debtor/Payor shall
not impair Guarantor's obligation to pay the full amount of the Guaranteed
Obligations. In the event Holder shall bid at any foreclosure or trustee's sale
or at any private sale permitted by law or the Loan Documents, Holder may bid
all or less than the amount of the Guaranteed Obligations and the amount of such
bid need not be paid by Holder but shall be credited against the Guaranteed
Obligations. The amount of the successful bid at any such sale shall be
conclusively deemed to be the fair market value of the Collateral and the
difference between such bid amount and the remaining balance of the Guaranteed
Obligations shall be conclusively deemed to be the amount of the Guaranteed
Obligations guaranteed under this Guaranty, notwithstanding any present or
future law or court decision or ruling that may have the effect of reducing the
amount of any deficiency claim to which Holder might otherwise be entitled but
for such bidding at any such sale.

3.   REPRESENTATIONS AND WARRANTIES. Subject to the limitations imposed by the
Existing Cases and certain insolvency proceedings in Bermuda and the resultant
fact that their activities are subject to approval of the United States
Bankruptcy Court and the Supreme Court of Bermuda, and the supervision and
oversight of the applicable joint provisional liquidators; PROVIDED, HOWEVER,
that the foregoing limitations shall cease to be applicable on and after the
earlier to occur of (i) the Plan Effective Date and (ii) October 31, 2002:

          3.1    ORGANIZATION, AUTHORITY AND QUALIFICATION OF THE GUARANTOR.
Guarantor is a company duly organized, validly existing and in good standing
under the laws of Bermuda and has all necessary power and authority to execute
and deliver this Guaranty, to carry out its obligations hereunder and to
consummate the transactions contemplated by this Guaranty. The execution and
delivery by Guarantor of this Guaranty, the performance by Guarantor of its
obligations hereunder and the consummation by Guarantor of the transactions
contemplated hereby have been duly authorized by all requisite corporate action
on the part of Guarantor. This Guaranty has been duly and validly executed and
delivered by Guarantor, and, assuming due authorization, execution and delivery
by Holder, this Guaranty constitutes the legal, valid and binding obligation of
Guarantor, enforceable against Guarantor in accordance with its terms.

                                        7
<Page>

          3.2    NO CONFLICT. Guarantor's execution and delivery of this
Guaranty and the performance of its respective obligations hereunder, and the
consummation of the transactions contemplated hereby do not and will not (a)
violate, conflict with, or result in the breach of the Memorandum and Articles
of Association, bylaws or similar organizational documents of Guarantor, (b)
conflict with, or violate any Law or Governmental Order applicable to Guarantor,
or any of Guarantor's assets and properties, or (c) conflict with, result in any
violation or breach of, constitute a default (or event which with the giving of
notice or lapse of time, or both, would become a default) under, require any
consent under, or give to any Person any rights of termination, acceleration,
amendment, suspension, revocation or cancellation of, any contract, agreement,
undertaking or instrument to which Guarantor is a party or by which any of its
assets or properties are bound.

4.   COVENANTS; FURTHER ASSURANCES.

          (a)    [Intentionally omitted.]

          (b)    Guarantor agrees, upon the reasonable written request of
     Holder, to execute and deliver to Holder, from time to time, any additional
     instruments or documents reasonably considered necessary by Holder to cause
     this Guaranty to be, become, or remain valid and effective in accordance
     with its terms.

          (c)    FINANCIAL INFORMATION.

                 (i)   For so long as Guarantor is required to file
     financial statements and other periodic reports under the rules and
     regulations promulgated by the Securities and Exchange Commission (a
     "REPORTING COMPANY"), Guarantor shall furnish to Holder, within ten (10)
     days after transmission thereof, copies of all financial statements, proxy
     statements, reports and any other general written communications which the
     Guarantor sends to its members and copies of all registration statements
     and all regular, special or periodic reports which it files, or any of its
     officers or directors file with respect to the Guarantor, with the
     Securities and Exchange Commission or with any securities exchange on which
     any of its securities are then listed (if any), copies of all press
     releases and other statements made available generally by the Guarantor to
     the public concerning material developments in the Guarantor's and its
     Subsidiaries' Businesses;

                 (ii)  Commencing on the conclusion of the first fiscal
     quarter of Guarantor of which, and continuing for so long as, Guarantor is
     no longer a Reporting Company, Guarantor shall deliver to Holder as soon as
     available, and in any event within forty-five (45) days after the close of
     each fiscal quarter of Guarantor (or within ninety (90) days after the
     close of the quarter that is also the close of the fiscal year of
     Guarantor), financial information in a form substantially similar to that
     which Guarantor would be required to file with the Securities and Exchange
     Commission if it were still a Reporting Company; PROVIDED that the
     financial information provided for the first three fiscal quarters need
     not, in any case, be audited, PROVIDED further that such unaudited
     financial information presents fairly the consolidated financial position,
     results of operations and cash flows of the Guarantor and its Subsidiaries
     on a consolidated basis as of the respective dates thereof.

                                        8
<Page>

                 (iii) Commencing on the conclusion of the first fiscal year
     of Guarantor of which, and continuing for so long as, Guarantor is no
     longer a Reporting Company, Guarantor shall deliver to Holder as soon as
     available, and in any event within ninety (90) days after the close of each
     fiscal year of the Guarantor, financial information in a form substantially
     similar to that which Guarantor would be required to file with the
     Securities and Exchange Commission if it were still a Reporting Company,
     PROVIDED that such audited financial statements shall be accompanied by:
     (i) an opinion of such accountants that does not contain any exceptions or
     qualifications and is to the effect that the financial statements described
     above fairly present the financial condition and the results of operations
     of the Guarantor and its Subsidiaries on a consolidated basis for the
     periods and as of the relevant dates thereof, and (ii) such accountants'
     management letter to the Guarantor relating to such audit report;

                 (iv)  Commencing on the conclusion of the first fiscal year
     of Guarantor of which, and continuing for so long as, Guarantor is no
     longer a Reporting Company, Guarantor shall present to Holder, at a
     location to be reasonably determined by Holder, the Guarantor's and its
     Subsidiaries' general review of the Business of Guarantor and its
     Subsidiaries. As part of such process, Guarantor shall, at Guarantor's sole
     expense, make such officers and employees as are reasonably requested by
     Holder available to discuss and answer questions regarding said Business.

     All of the financial information referred to in SUBSECTIONS (i) and (ii)
     above shall fairly present the financial condition and results of
     operations of the Guarantor and its Subsidiaries in all material respects
     as of the dates and for the periods stated therein, subject in the case of
     the unaudited financial statements to changes resulting from normal
     year-end auditing adjustments (none of which would, alone or in the
     aggregate, have a materially adverse effect on (a) the financial condition,
     operating results, prospects, assets, liabilities, operations, condition
     (financial or otherwise) or Business of the Guarantor and its Subsidiaries
     taken as a whole or (b) the ability of the Guarantor to satisfy the
     Guaranteed Obligations.

                 (v)   Guarantor shall deliver to Holder copies of any
     material financial information provided to the Guarantor's bondholders
     after the Effective Date pursuant to the Plan of Reorganization or
     otherwise within five (5) days after delivery thereof to such bondholders.

5.   PAYMENTS FREE AND CLEAR OF TAXES.

          If Guarantor shall be required by law to deduct any Taxes, other than
Excluded Taxes, from or in respect of any payment to Holder, (a) the amount of
such payment shall be increased as shall be necessary so that after Guarantor
has made all required deductions (including deductions applicable to additional
sums payable under this SECTION 5), Holder receives an amount equal to the sum
it would have received had no such deductions, other than deductions for
Excluded Taxes, been made, and (b) Guarantor shall make all such deductions and
pay the full amount deducted to the relevant taxation authority in accordance
with applicable law. Within thirty (30) days after the date of any payment of
Taxes, Guarantor shall furnish to Holder the original or a certified copy of a
receipt evidencing payment thereof. Guarantor shall jointly

                                        9
<Page>

and severally indemnify and, within ten (10) days of demand therefore, pay
Holder for the full amount of Taxes (including any Taxes imposed by any
jurisdiction on amounts payable under this SECTION 5) paid by Holder, as
appropriate, and any liability (including penalties, interest and expenses)
arising therefrom or with respect thereto, whether or not such Taxes were
correctly or legally asserted.

6.   EFFECTIVE DATE.

          Notwithstanding anything herein to the contrary, Guarantor hereby
acknowledges and agrees that this Guaranty shall be effective for all purposes,
and shall have been deemed to have been continuously in effect, on and as of
May 16, 2002.

7.   OTHER TERMS.

          7.1    COMPLETE AGREEMENT; THIRD-PARTY BENEFICIARIES. This Guaranty,
together with the other Loan Documents, is intended by the parties as the final
expression of their agreement regarding the subject matter hereof and is a
complete and exclusive statement of the terms and conditions of such agreement.
There are no third-party beneficiaries of this Guaranty (other than successors
and assigns of Holder).

          7.2    ENGLISH LANGUAGE. Any translation of this Guaranty into another
language shall have no interpretive effect. All documents or notices to be
delivered pursuant to or in connection with this Guaranty shall be in the
English language, or, if any such document or notice is not in the English
language, accompanied by an English translation thereof, and the English
language version of any such document or notice shall control for purposes
hereof.

          7.3    HEADINGS. The headings in this Guaranty are for convenience of
reference only and are not part of the substance of this Guaranty.

          7.4    SEVERABILITY. Whenever possible, each provision of this
Guaranty shall be interpreted in such a manner to be effective and valid under
applicable law, but if any provision of this Guaranty shall be prohibited by or
made invalid under applicable law, such provision shall be ineffective to the
extent of such prohibition or invalidity, without invalidating the remainder of
such provision or the remaining provisions of this Guaranty.

          7.5    NOTICES. Every notice demand, request, consent, approval,
declaration or other communication hereunder shall be in writing and shall be
given or made (i) by delivery in person, (ii) by a reputable international
overnight courier service, or (iii) by telecopy to the respective parties at the
following addresses:

                 (a) If to Holder, at:

                     xxxx

                 (b) If to Guarantor, at:

                     FLAG TELECOM HOLDINGS LIMITED
                     c/o FLAG Telecom Group Limited

                                       10
<Page>

                     Cedar House
                     41 Cedar Avenue
                     Hamilton HM12, Bermuda
                     Facsimile: (441) 296 0938
                     Attention: General Counsel

                     With a copy to (which shall not constitute notice):

                     FLAG Telecom Limited
                     9 South Street
                     London W1K 2XA, United Kingdom
                     Facsimile : +44 207 317 0898
                     Attention: General Counsel

or at such other address as may be substituted by notice given as herein
provided. The giving of any notice required hereunder may be waived in writing
by the party entitled to receive such notice. Every notice, demand, request,
consent, approval, declaration or other communication hereunder shall be deemed
to have been validly served, given or delivered (i) upon transmission, when sent
by telecopy or other similar facsimile transmission (with such telecopy or
facsimile promptly confirmed by delivery of a copy by personal delivery or
United States mail as otherwise provided in this SECTION 6.5), (ii) two (2)
Business Days after deposit with a reputable international overnight carrier
with all charges prepaid, or (iii) when delivered, if hand delivered.

          7.6    SUCCESSORS AND ASSIGNS. This Guaranty and all obligations of
Guarantor hereunder shall be binding upon the successors and assigns of
Guarantor (including a debtor-in-possession on behalf of Guarantor) and shall,
together with the rights and remedies of the Holder, inure to the benefit of
Holder, all future holders of any instrument evidencing any of the Guaranteed
Obligations and their respective successors and assigns; PROVIDED, HOWEVER, that
any such successor and assign shall be a "permitted assign" as defined in
Section 20 of the Secured Note. No sales of participations, other sales,
assignments, transfers or other dispositions of any agreement governing or
instrument evidencing the Guaranteed Obligations or any portion thereof or
interest therein shall in any manner affect the rights of Holder hereunder,
unless such sales, assignments, transfers or other dispositions were effected in
compliance with the provisions of the applicable Secured Note. Guarantor may
not, without the prior written consent of Holder, assign, sell, hypothecate or
otherwise transfer any interest in or obligation under this Guaranty except in
connection with the Plan.

          7.7    NO WAIVER; CUMULATIVE REMEDIES; AMENDMENTS. Holder shall not by
any act, delay, omission or otherwise be deemed to have waived any of its rights
or remedies hereunder, and no waiver shall be valid unless in writing, signed by
Holder and then only to the extent therein set forth. A waiver by Holder of any
right or remedy hereunder on any one occasion shall not be construed as a bar to
any right or remedy which Holder would otherwise have had on any future
occasion. No failure to exercise, nor any delay in exercising on the part of
Holder, any right, power or privilege hereunder, shall operate as a waiver
thereof, nor shall any single or partial exercise of any right, power or
privilege hereunder preclude any other or future exercise thereof or the
exercise of any other right, power or privilege. The rights and

                                       11
<Page>

remedies hereunder provided are cumulative and may be exercised singly or
concurrently, and are not exclusive of any rights and remedies provided by law.
None of the terms or provisions of this Guaranty may be waived, altered,
modified, supplemented or amended except by an instrument in writing, duly
executed by Holder and Guarantor.

          7.8    TERMINATION. This Guaranty is a continuing guaranty and shall
remain in full force and effect until the Termination Date. Upon payment and
performance in full of the Guaranteed Obligations, Holder shall, at Guarantor's
sole expense, deliver to Guarantor such documents as Guarantor may reasonably
request to evidence such termination. The obligations of Holder contained in
this SECTION 6.8 shall survive the termination of this Guaranty and remain in
effect until Holder has complied in all material respects with all of such
obligations.

          7.9    COUNTERPARTS. This Guaranty may be executed in any number of
counterparts, each of which shall collectively and separately constitute one and
the same agreement.

          7.10   GOVERNING LAW. THIS GUARANTY AND ALL DISPUTES WITH RESPECT
HERETO SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE
STATE OF NEW YORK (OTHER THAN CHOICE OF LAW RULES THAT WOULD REQUIRE THE
APPLICATION OF THE LAWS OF ANY OTHER JURISDICTION).

[THE REMAINDER OF THIS PAGE IS INTENTIONALLY LEFT BLANK. SIGNATURE PAGE
FOLLOWS.]

                                       12
<Page>

          IN WITNESS WHEREOF, the parties hereto have executed and delivered
this Guaranty as of the date first above written.

                              FLAG Telecom Holdings Limited

                              By:
                                  ----------------------------
                              Name: Kees van Ophem
                              Title: Assistant Secretary

                              xxxx

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

                                       13

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