STOCK PURCHASE AGREEMENT

                                    BY AND BETWEEN


            COMMUNICATION TELESYSTEMS INTERNATIONAL D.B.A. WORLDXCHANGE
                                   COMMUNICATIONS


                                         AND


                              GOLD & APPEL TRANSFER S.A.



                                     MAY 10, 1999
- -------------------------------------------------------------------------------



                                  TABLE OF CONTENTS




                                                                                 PAGE
                                                                               
1.     DEFINITIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

2.     PURCHASE AND SALE OF THE INITIAL SHARES . . . . . . . . . . . . . . . . . . .4

       2.1    Purchase and Sale of the Initial Shares  . . . . . . . . . . . . . . .4

       2.2    Conditions Precedent to Sale of the Initial Shares . . . . . . . . . .4

3.     SALE OF ADDITIONAL SHARES . . . . . . . . . . . . . . . . . . . . . . . . . .5

       3.1    Sale of Second Closing Shares  . . . . . . . . . . . . . . . . . . . .5

       3.2    Conditions Precedent to Sale of Second Closing Shares  . . . . . . . .5

       3.3    Sale of Third Closing Shares . . . . . . . . . . . . . . . . . . . . .5

       3.4    Conditions Precedent to Sale of Third Closing Shares . . . . . . . . .6

4.     REPRESENTATIONS AND WARRANTIES OF THE COMPANY . . . . . . . . . . . . . . . .6

       4.1    Organization and Corporate Power . . . . . . . . . . . . . . . . . . .6

       4.2    Capital Stock and Related Matters  . . . . . . . . . . . . . . . . . .6

       4.3    Authorization; No Conflicts  . . . . . . . . . . . . . . . . . . . . .7

       4.4    Governmental Consent . . . . . . . . . . . . . . . . . . . . . . . . .7

       4.5    Financial Statements . . . . . . . . . . . . . . . . . . . . . . . . .7

       4.6    No Brokers or Finders  . . . . . . . . . . . . . . . . . . . . . . . .8

       4.7    Accuracy of Information  . . . . . . . . . . . . . . . . . . . . . . .8

       4.8    No Material Adverse Change . . . . . . . . . . . . . . . . . . . . . .8

       4.9    Conformity with Law; Litigation  . . . . . . . . . . . . . . . . . . .8

       4.10   ERISA  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

       4.11   Environmental Matters  . . . . . . . . . . . . . . . . . . . . . . . .8

       4.12   Government Authorizations  . . . . . . . . . . . . . . . . . . . . . .8

       4.13   Taxes  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

       4.14   Insurance  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

5.     REPRESENTATIONS AND WARRANTIES OF THE PURCHASER . . . . . . . . . . . . . . .9

       5.1    Organization and Corporate Power . . . . . . . . . . . . . . . . . . .9

       5.2    Authorization  . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

       5.3    No Conflicts . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

       5.4    No Brokers or Finders  . . . . . . . . . . . . . . . . . . . . . . . .9

       5.5    Investment Representations . . . . . . . . . . . . . . . . . . . . . .9


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                                                                                 PAGE

6.     TRANSFER OF SHARES  . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

       6.1    Restrictive Legends  . . . . . . . . . . . . . . . . . . . . . . . . 10

       6.2    Notice of Proposed Transfers . . . . . . . . . . . . . . . . . . . . 11

       6.3    Permitted Transfers  . . . . . . . . . . . . . . . . . . . . . . . . 11

7.     CERTAIN COVENANTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

       7.1    Preemptive Rights  . . . . . . . . . . . . . . . . . . . . . . . . . 11

       7.2    Registration Rights  . . . . . . . . . . . . . . . . . . . . . . . . 12

       7.3    Rule 144 Filing  . . . . . . . . . . . . . . . . . . . . . . . . . . 12

       7.4    Changes in Capital Stock . . . . . . . . . . . . . . . . . . . . . . 12

8.     INDEMNIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

       8.1    Obligations of the Company . . . . . . . . . . . . . . . . . . . . . 13

       8.2    Obligations of the Purchaser . . . . . . . . . . . . . . . . . . . . 13

       8.3    Procedure  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

       8.4    Exclusive Remedy . . . . . . . . . . . . . . . . . . . . . . . . . . 14

9.     GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

       9.1    Amendments; Waivers  . . . . . . . . . . . . . . . . . . . . . . . . 14

       9.2    First Gold & Appel Agreement . . . . . . . . . . . . . . . . . . . . 14

       9.3    Survival of Representations and Warranties . . . . . . . . . . . . . 14

       9.4    Schedules; Exhibits; Integration . . . . . . . . . . . . . . . . . . 14

       9.5    Best Efforts; Further Assurances . . . . . . . . . . . . . . . . . . 14

       9.6    Governing Law and Forum Selection  . . . . . . . . . . . . . . . . . 15

       9.7    No Assignment  . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

       9.8    Headings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

       9.9    Counterparts . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

       9.10   Publicity and Reports  . . . . . . . . . . . . . . . . . . . . . . . 15

       9.11   Confidentiality  . . . . . . . . . . . . . . . . . . . . . . . . . . 15

       9.12   Parties in Interest  . . . . . . . . . . . . . . . . . . . . . . . . 16

       9.13   Notices  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

       9.14   Expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

       9.15   Waiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

       9.16   Representation By Counsel; Interpretation  . . . . . . . . . . . . . 17


                                         -ii-



                                                                                 PAGE

       9.17   Severability . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

       9.18   No Consequential Damages . . . . . . . . . . . . . . . . . . . . . . 17













                                        -iii-



SCHEDULES AND EXHIBITS

Schedule 4.2     Equity Securities

Schedule 4.14    Directors and Officers Liability Insurance

Exhibit A        New Registration Rights Agreement

Exhibit B        Form of Opinion of O'Melveny & Myers LLP -Initial Closing

Exhibit C        Form of Opinion of O'Melveny & Myers LLP - Second Closing

Exhibit D        Form of Opinion of O'Melveny & Myers LLP - Third Closing









                                         -iv-



                               STOCK PURCHASE AGREEMENT

              THIS STOCK PURCHASE AGREEMENT (this "AGREEMENT") is dated May 10,
1999, by and between COMMUNICATION TELESYSTEMS INTERNATIONAL D.B.A. WORLDXCHANGE
COMMUNICATIONS, a California corporation (the "COMPANY"), and GOLD & APPEL
TRANSFER S.A., a British Virgin Islands corporation (the "PURCHASER").

              The parties hereby agree as follows:

1.     DEFINITIONS.

              1.1 Definitions.

              1.1.1 For all purposes of this Agreement, except as otherwise
              expressly provided or unless the context otherwise requires,

                            (a)    the terms defined in this SECTION 1 have the
              meanings assigned to them in this SECTION 1 and include the plural
              as well as the singular,

                            (b)    the words "herein," "hereof," "hereto" and
              "hereunder" and other words of similar import refer to this
              Agreement as a whole and not to any particular Section, Subsection
              or other subdivision, unless the context otherwise requires, and

                            (c)    all accounting terms not otherwise defined
              herein have the meanings assigned under generally accepted
              accounting principles.

              1.2  As used in this Agreement, the following definitions shall
              apply.

              "AFFILIATE" means a Person that directly, or indirectly through
one or more intermediaries, controls, is controlled by or is under common
control with, a specified Person.

              "AGREEMENT" means this Agreement by and between the Company and
the Purchaser as amended or supplemented together with the Exhibits and all
Schedules attached or incorporated by reference.

              "APPROVAL" means any approval, authorization, consent,
qualification or registration, or any waiver of any of the foregoing, required
to be obtained from, or any notice, statement or other communication required to
be filed with or delivered to, any Governmental Entity or any other Person.

              "ATOCHA" means Atocha, L.P., a Texas limited partnership.

              "AUDITORS" means Ernst & Young LLP, independent public accountants
to the Company.


                                          1



              "COMPANY" means Communication TeleSystems International d.b.a.
WorldxChange Communications, a California corporation.

              "CONTRACT" means any agreement, arrangement, bond, commitment,
franchise, indemnity, indenture, instrument, lease, license or understanding,
whether or not in writing.

              "ENCUMBRANCE" means any claim, charge, easement, encumbrance,
lease, covenant, security interest, lien, option, pledge, rights of others or
restriction (whether on voting, sale, transfer, disposition or otherwise),
whether imposed by agreement, understanding, law, equity or otherwise, except
for any restrictions on transfer generally arising under any applicable federal
or state securities law.

              "EQUITY SECURITIES" means any capital stock of the Company
(including, without limitation, common stock and preferred stock) or other
equity interest in the Company or any securities convertible into or
exchangeable for capital stock of or an entity interest in, the Company or any
other rights (statutory, contractual or otherwise), warrants or options to
acquire any of the foregoing securities.

              "EXCHANGE ACT" means the Securities Exchange Act of 1934, as
amended.

              "FIRST ATOCHA AGREEMENT" means that certain Stock Purchase
Agreement, dated September 29, 1998, by and among the Company, Atocha, Roger B.
Abbott, Rosalind Abbott and Edward S. Soren.

              "FIRST GOLD & APPEL AGREEMENT" means that certain Stock Purchase
Agreement dated September 29, 1998 by and between the Company, Gold & Appel,
Roger B. Abbott, Rosalind Abbott and Edward S. Soren.

              "GAAP" means generally accepted accounting principles in the
United States, as in effect from time to time.

              "GOLD & APPEL" means Gold & Appel Transfer S.A., a British Virgin
Islands corporation.

              "GOVERNMENTAL ENTITY" means any government or any agency, bureau,
board, commission, court, department, official, political subdivision, tribunal
or other instrumentality of any government, whether federal, state or local,
domestic or foreign.

              "INDEMNIFIABLE CLAIM" means any Loss for or against which any
party is entitled to indemnification under this Agreement; "INDEMNIFIED PARTY"
means the party entitled to indemnity hereunder; and "INDEMNIFYING PARTY" means
the party obligated to provide indemnification hereunder.

              "INITIAL CLOSING" has the meaning specified in SECTION 2.1.

              "INITIAL CLOSING DATE" has the meaning specified in SECTION 2.1.

              "INITIAL SHARES" means 909,090 shares of Stock to be issued by the
Company pursuant to SECTION 2.


                                          2



              "LAW" means any constitutional provision, statute or other law,
rule, regulation, or interpretation of any Governmental Entity and any Order.

              "LOSS" means any action, cost, damage, disbursement, expense,
liability, loss, deficiency, diminution in value, obligation, penalty or
settlement of any kind or nature, whether foreseeable or unforeseeable,
including but not limited to, interest or other carrying costs, penalties,
legal, accounting and other professional fees and expenses incurred in the
investigation, collection, prosecution and defense of claims and amounts paid in
settlement, that may be imposed on or otherwise incurred or suffered by the
specified Person, but excluding any consequential damages.

              "MATERIAL ADVERSE EFFECT" means a material adverse effect on the
financial condition and business operations of the Company and its Subsidiaries
taken as a whole.

              "MATERIAL CONTRACT" means any Contract material to the business of
the subject Person as of the date hereof.

              "NEW REGISTRATION RIGHTS AGREEMENT" means the Registration Rights
Agreement in the form attached hereto as EXHIBIT A.

              "OFFERING MEMORANDUM" means that certain preliminary offering
circular, prepared by the Company, dated May 4, 1998 (the "PRELIMINARY OFFERING
CIRCULAR") as supplemented by a supplement to the Preliminary Offering Circular,
prepared by the Company, dated May 1, 1999, in the form delivered to Purchaser
with this Agreement.

              "ORDER" means any decree, injunction, judgment, order, ruling,
assessment or writ.

              "PERSON" means an association, a corporation, an individual, a
partnership, a trust or any other entity or organization, including a
Governmental Entity.

              "PROCEEDING" means any action, arbitration, audit, hearing,
investigation, litigation or suit (whether civil, criminal, administrative,
investigative or informal) commenced, brought, conducted or heard by or before,
any Governmental Entity or arbitrator.

              "PURCHASER" means Gold & Appel Transfer S.A., a British Virgin
Islands corporation.

              "REGISTRATION RIGHTS AGREEMENT" means that certain Registration
Rights Agreement, dated as of September 29, 1998, by and among the Company and
the investors set forth on the signature pages thereto.

              "SEC" means the Securities and Exchange Commission or any
successor entity.

              "SECOND ATOCHA AGREEMENT" means that certain Stock Purchase
Agreement dated February 3, 1999, by and between the Company and Atocha.

              "SECOND CLOSING" has the meaning specified in SECTION 3.1.


                                          3



              "SECOND CLOSING DATE" has the meaning specified in SECTION 3.1.

              "SECOND CLOSING SHARES" means 909,090 shares of Stock to be issued
by the Company at the Second Closing.

              "SECURITIES ACT" means the Securities Act of 1933, as amended.

              "STOCK" means the common stock of the Company, no par value.

              "SUBSIDIARY" means any Person in which the Company has a direct or
indirect equity or ownership interest in excess of 50%.

              "TAX" or "TAXES" means all federal, state, local or foreign net or
gross income, gross receipts, net proceeds, sales, use, AD VALOREM, value added,
franchise, bank shares, withholding, payroll, employment, excise, property,
deed, stamp, alternative or add-on minimum, environmental or other taxes,
assessments, duties, fees, levies or other governmental charges of any nature
whatsoever, whether disputed or not, together with any interest, penalties,
additions to tax or additional amounts with respect thereto.

              "THIRD CLOSING" has the meaning specified in Section 3.3.

              "THIRD CLOSING DATE" has the meaning specified in SECTION 3.3.

              "THIRD CLOSING SHARES" means 909,090 shares of stock to be issued
by the Company at the Third Closing.

2.     PURCHASE AND SALE OF THE INITIAL SHARES.

              2.1 PURCHASE AND SALE OF THE INITIAL SHARES. Subject to SECTION
2.2, on or before the later to occur of (I) July 1, 1999 or (ii) the first
business day after the date that all of the conditions set forth in SECTION 2.2
have been satisfied or waived by the parties hereto, the Purchaser shall deliver
by wire transfer of immediately available funds in the amount of $10,000,000 to
the Company against the delivery by the Company to the Purchaser of a
certificate, issued in the name of the Purchaser, evidencing the Initial Shares
(the "INITIAL CLOSING"). The date on which the Initial Closing occurs shall be
the "INITIAL CLOSING DATE."

              2.2 CONDITIONS PRECEDENT TO SALE OF THE INITIAL SHARES. The
obligations of the Company and the Purchaser to sell and purchase the Initial
Shares, respectively, are subject to the satisfaction, at or prior to the
Initial Closing Date, of each of the following conditions (which shall be the
only conditions to the Initial Closing and any of which may be waived by the
agreement of both parties, in whole or in part):

              2.2.1  NO PROHIBITION. Neither the consummation nor the
              performance of any of the transactions contemplated by this
              Agreement at the Initial Closing will, directly or indirectly
              (with or without notice or lapse of time), materially contravene
              or conflict with, or result in a material violation of, any
              applicable Law or Order.


                                          4



              2.2.2 BRING-DOWN OF SELECTED REPRESENTATIONS AND WARRANTIES. The
              representations and warranties of the Company set forth in the
              following portions of the indicated Sections of this Agreement
              shall be true and correct as of the Initial Closing Date: (1) the
              first two sentences of Section 4. 1; (2) the last sentence of
              Section 4.2; (3) the first sentence of Section 4.3; and (4) the
              third sentence of Section 4.3, except as to clause (ii) thereof.

              In addition to being subject to the satisfaction of the conditions
specified in Sections 2.2.1 and 2.2.2, the Purchaser's obligations to purchase
the Initial Shares shall also be conditioned on Purchaser's receipt from the
Company of an opinion of O'Melveny & Myers LLP, dated the Initial Closing Date,
in the form attached hereto as EXHIBIT B.

3.     SALE OF ADDITIONAL SHARES

              3.1 SALE OF SECOND CLOSING SHARES. Subject to SECTION 3.2, on or
before August 1, 1999 the Purchaser shall deliver by wire transfer of
immediately available funds in the amount of $10,000,000 to the Company against
the delivery by the Company to the Purchaser of a certificate, issued in the
name of the Purchaser, evidencing the Second Closing Shares (the "SECOND
CLOSING"). The date on which the Second Closing occurs shall be the "SECOND
CLOSING DATE."

              3.2 CONDITIONS PRECEDENT TO SALE OF SECOND CLOSING SHARES. The
obligations of the Company and the Purchaser to sell and purchase the Second
Closing Shares, respectively, are subject to the satisfaction, at or prior to
the Second Closing, of each of the following conditions (any of which may be
waived by the agreement of both parties, in whole or part):

              3.2.1 NO PROHIBITION. Neither the consummation nor the performance
              of any of the transactions contemplated by this Agreement at the
              Second Closing will, directly or indirectly (with or without
              notice or lapse of time), materially contravene or conflict with,
              or result in a material violation of, any applicable Law or Order.

              3.2.2 BRING-DOWN OF SELECTED REPRESENTATIONS AND WARRANTIES. The
              representations and warranties of the Company set forth in the
              following portions of the indicated Sections of this Agreement
              shall be true and correct as of the Second Closing Date: (1) the
              first two sentences of Section 4. 1; (2) the last sentence of
              Section 4.2; (3) the first sentence of Section 4.3); and (4) the
              third sentence of Section 4.3, except as to clause (ii) thereof.

              In addition to being subject to the satisfaction of the conditions
specified. in Sections 3.2.1 and 3.2.2, the Purchaser's obligations to purchase
tile Second Closing Shares shall also be conditioned on Purchaser's receipt from
the Company of an opinion of O'Melveny & Myers LLP, dated the Second Closing
Date, in the form attached hereto as EXHIBIT C.

              3.3 SALE OF THIRD CLOSING SHARES. Subject to SECTION 3.4. on or
before September 1, 1999 the Purchaser shall deliver by wire transfer of
immediately available funds in the amount or$ 10,000,000 to the Company against
tile delivery by tile Company to tile Purchaser of a certificate, Issued in tile
name oil' tile PURCHASER evidencing the Third Closing


                                          5



Shares (the "THIRD CLOSING"). The date on which the Third Closing occurs shall
be the "THIRD CLOSING DATE."

              3.4 CONDITIONS PRECEDENT TO SALE OF THIRD CLOSING SHARES. The
obligations of the Company and the Purchaser to sell and purchase the Third
Closing Shares, respectively, are subject to the satisfaction, at or prior to
the Third Closing, of each of the following conditions (any of which may be
waived by the agreement of both parties, in whole or part):

              3.4.1 NO PROHIBITION. Neither the consummation nor the performance
              of any of the transactions contemplated by this Agreement at the
              Third Closing will, directly or indirectly (with or without notice
              or lapse of time), materially contravene or conflict with, or
              result in a material violation of, any applicable Law or Order.

              3.4.2 BRING-DOWN OF SELECTED REPRESENTATIONS AND WARRANTIES. The
              representations and warranties of the Company set forth in the
              following portions of the indicated Sections of this Agreement
              shall be true and correct as of the Third Closing Date: (1) the
              first two sentences of Section 4. 1; (2) the last sentence of
              Section 4.2; (3) the first sentence of Section 4.3; and (4) the
              third sentence of Section 4.3, except as to clause (ii) thereof.

              In addition to being subject to the satisfaction of the conditions
specified in Sections 3.4.1 and 3.4.2, the Purchaser's obligations to purchase
the Third Closing Shares shall also be conditioned on Purchaser's receipt from
the Company of an opinion of O'Melveny & Myers LLP, dated the Third Closing
Date, in the form attached hereto as EXHIBIT D.

4.     REPRESENTATIONS AND WARRANTIES OF THE COMPANY.

       Except as otherwise disclosed in the Offering Memorandum or as set forth
in the attached Schedules, the Company represents and warrants that as of the
date hereof:

              4.1 ORGANIZATION AND CORPORATE POWER. The Company is a corporation
duly organized, validly existing and in good standing under the laws of the
State of California. The Company has all requisite corporate power and corporate
authority necessary to (I) execute, deliver and perform this Agreement and to
consummate the transactions contemplated hereby? and (ii) own and operate its
properties and to carry on its business as now conducted and as presently
proposed to be conducted. The copies of the Company's charter documents and
bylaws furnished to the Purchaser's counsel reflect all amendments made thereto
at any time prior to the date of this Agreement and are correct and complete.
The Company is duly qualified to do business as a foreign corporation and is in
good standing under the laws of each state or other jurisdiction in which either
the ownership or use of the properties owned or used by it, or the nature of the
activities conducted by it, requires such qualification, except where the
failure to be so qualified would not have a Material Adverse Effect.

              4.2 CAPITAL STOCK AND RELATED MATTERS. The authorized capital
stock of the Company is as set forth in its articles of incorporation and the
Outstanding capital stock, options and other rights to acquire capital stock and
shares reserved for Issuance as of May 1, 1999 are as set forth in Schedule 4.2.
Except as set forth in Schedule 4.2 and as contemplated by this Agreement. as of
May 1. 1999: (1) the Company; does not have outstanding- any stock or


                                          6



securities convertible or exchangeable for any shares of capital stock, nor are
there OUTSTANDING any rights or options to subscribe for or to purchase any
capital stock or any stock or SECURITIES CONVERTIBLE INTO OR EXCHANGEABLE FOR
any capital stock of the Company, and (ii) the Company is not subject to any
obligation (contingent or otherwise) to repurchase or otherwise acquire or
retire any shares of its capital stock. All of the outstanding shares of capital
stock of the Company have been duly authorized and validly issued and are fully
paid and nonassessable. The Initial Shares, the Second Closing Shares and the
Third Closing Shares when issued and sold in accordance with the terms of this
Agreement, will be duly authorized and validly ISSUED, FULLY paid and
nonassessable.

              4.3 AUTHORIZATION; NO CONFLICTS. The execution, delivery and
performance of this Agreement by the Company and the consummation of the
transactions contemplated hereby have been duly authorized by all necessary
corporate action on the part of the Company. This Agreement constitutes the
legally valid and binding obligation of the Company, enforceable against the
Company in accordance with its terms. The execution, delivery and performance of
this Agreement, and the consummation of the transactions contemplated hereby, by
the Company will not violate or constitute a breach or default whether upon
lapse of time and/or the occurrence of any act or event or otherwise under (I)
the charter documents or bylaws of the Company, (ii) any Material Contract to
which the Company is a party, or (iii) any material Law or Order to which the
Company is subject.

              4.4 GOVERNMENTAL CONSENT. No further permit, consent, Approval,
authorization of, declaration to or filing with any Governmental Entity is
required in connection with the execution, delivery and performance of this
Agreement by the Company or the consummation by the Company of any transactions
contemplated hereby, except as have already been obtained or accomplished.

              4.5 FINANCIAL STATEMENTS.

              4.5.1  AUDITED FINANCIAL STATEMENTS. The Company has delivered to
              the Purchaser consolidated balance sheets for the Company and its
              Subsidiaries at September 30, 1998, 1997 and 1996 and the related
              consolidated statements of operations, changes in stockholders'
              equity and changes in financial position or cash flow for the
              periods then ended. All such financial statements have been
              examined by the Auditors whose reports thereon are included with
              such financial statements. All such financial statements have been
              prepared in conformity-with GAAP. Such statements of operations
              and cash flow present fairly in all material respects the results
              of operations and cash flows of the Company and its Subsidiaries
              for the respective periods covered, and the balance sheets present
              fairly in all material respects the financial condition of the
              Company and its Subsidiaries as of their respective dates.

              4.5.2  UNAUDITED INTERIM FINANCIAL STATEMENTS. The Company has
              delivered to the Purchaser all unaudited consolidated balance
              sheet for the Company and its Subsidiaries at March 31, 1999, and
              the related unaudited consolidated statement of operations and
              cash flows and changes in stockholder's equity for the six (6)
              months ending March 31, 1999 (the "Interim Statements"). The
              Interim Statements have been prepared in conformity with GAAP
              applied oil a consistent


                                          7



              basis except for (I) changes, if any, disclosed therein (except
              for the absence of notes and normal year-end adjustments
              consistent with past practices) and (ii) Information in the
              Interim Statements concerning EBITDA, which is not determined in
              accordance with GAAP. The statement of operations presents fairly
              the results of operations of the Company and its Subsidiaries for
              the PERIOD covered, and the balance sheet presents fairly in all
              material respects the financial condition of the Company as of the
              respective date of such balance sheet.

              4.6 No Brokers or Finders. No agent, broker, finder or investment
or commercial banker, or other Person or firm engaged by or acting on behalf of
the Company or its Affiliates in connection with the negotiation, execution or
performance of this Agreement or the transactions contemplated by this
Agreement, is or will be entitled to any broker's or finder's or similar fee or
other commission as a result of this Agreement or such transactions.

              4.7 Accuracy of Information. As of May 1, 1999, except as to any
information pertaining to general industry or regulatory matters, including
without limitation any information pertaining to general industry or regulatory
matters set forth in the risk factors and business sections of the Offering
Memorandum, the Offering Memorandum does not contain any untrue statement of a
material fact, or fail to state any material fact required to be stated therein
or necessary in order to make the statements therein, in light of the
circumstances under which they were made, not misleading.

              4.8 No Material Adverse Change. Since April 1, 1999, there has not
been any Material Adverse Effect.

              4.9 CONFORMITY WITH LAW; LITIGATION. To the knowledge of the
Company, the Company has complied with all Laws applicable to it or to the
operation of its business and has not received any written notice of any
violation of, liability or potential responsibility under, any such Law which
has not heretofore been cured and for which there is no remaining liability,
other than, in each case, those not having a Material Adverse Effect.

              4.10   ERISA. Each Company employee benefit plan that is subject
to ERISA has been administered in compliance with the applicable requirements of
ERISA, except for such noncompliance, if any, that in the aggregate, would not
have a Material Adverse Effect.

              4.11   ENVIRONMENTAL MATTERS. To the knowledge of the Company, all
real property now or previously owned, operated or leased by the Company and
located in the United States has been operated by the Company in compliance with
all applicable Environmental Laws, except for such noncompliance, if any, that
would not have a Material Adverse Effect. As used herein, "ENVIRONMENTAL LAW"
means any federal, state, or local law, statute, rule or regulation governing or
relating to the environment or to occupational health and safety:

              4.12   GOVERNMENT AUTHORIZATIONS. The Company has all federal,
state and local governmental licenses, permits and other authorizations,
including without limitation ail licenses and authorizations required by the
United States Federal Communications Commission and by state public utilities
commissions necessary to conduct the Company's business as presently conducted,
except where the failure to hold any such licenses. permits and other
authorizations would not result in a Material Adverse Effect.


                                          8


              4.13   TAXES. To the knowledge of the Company, all Taxes owed by
the Company have been paid or accrued on the Company's financial statements,
except where the failure to pay or accrue such Taxes would not result in a
Material Adverse Effect.

              4.14   INSURANCE. SCHEDULE 4.14 sets forth a true and correct
description of the directors and officers liability insurance policy currently
maintained by the Company. There have been no claims made against such insurance
policy.

5.     REPRESENTATIONS AND WARRANTIES OF THE PURCHASER. The Purchaser represents
and warrants that:

              5.1 ORGANIZATION AND CORPORATE POWER. The Purchaser is a
corporation duly organized, validly existing and in good standing under the laws
of the British Virgin Islands. The Purchaser has all requisite corporate power
and authority to execute, deliver and perform this Agreement and to consummate
the transactions contemplated hereby.

              5.2 AUTHORIZATION. The execution, delivery and performance of this
Agreement by the Purchaser and the consummation of the transactions contemplated
hereby have been duly authorized by all necessary corporate action on the part
of the Purchaser. This Agreement constitutes the legally valid and binding
obligation of the Purchaser, enforceable against the Purchaser in accordance
with its terms.

              5.3 NO CONFLICTS. The execution, delivery and performance of this
Agreement, and the consummation of the transactions contemplated hereby, by the
Purchaser will not violate, or constitute a breach or default whether upon lapse
of time and/or the occurrence of any act or event or otherwise under (i) the
charter documents or bylaws of the Purchaser, (ii) any Material Contract to
which the Purchaser is a party, or (iii) any material Law or Order to which the
Purchaser is subject.

              5.4 NO BROKERS OR FINDERS. No agent, broker, finder or investment
or commercial banker, or other Person or firm engaged by or acting on behalf of
the Purchaser or its Affiliates in connection with the negotiation, execution or
performance of this Agreement or the transactions contemplated by this
Agreement, is or will be entitled to any broker's or finder's or similar fee or
other commission as a result of this Agreement or such transactions.

              5.5 INVESTMENT REPRESENTATIONS.

              5.5.1 This Agreement is made with the Purchaser in reliance upon
              the Purchaser's representation to the Company, which by the
              Purchaser's execution of this Agreement, the Purchaser hereby
              confirms, that (i) the Initial Shares, the Second Closing Shares
              and the Third Closing Shares are being acquired for investment for
              the Purchaser's own account, not as a nominee or agent, and not
              with a view to the resale or distribution of any part thereof,
              and that the Purchaser has no present intention of selling,
              granting any participation in, or otherwise distributing the same;
              and (ii) the Purchaser does not have any Contract, undertaking,
              agreement or arrangement with any Person to sell, transfer or
              grant participations to any Person with respect to any of the
              Initial Shares, the Second Closing Shares or the Third Closing
              Shares.


                                          9



              5.5.2  The Purchaser has not been attracted to the purchase of the
              Initial Shares, the Second Closing Shares or the Third Closing
              Shares by any publication or any advertising, and the transactions
              contemplated by this Agreement are not being effected by or
              through a broker-dealer.

              5.5.3  The Purchaser is an "accredited investor" within the
              meaning of Rule 501 of Regulation D promulgated by the SEC, as
              presently in effect.

              5.5.4  The Purchaser understands that (i) neither the Initial
              Shares, the Second Closing Shares nor the Third Closing Shares nor
              the sale thereof to it have or has been registered under the
              Securities Act, or under any state securities law, (ii) no
              registration statement has been filed with the SEC, nor with any
              other regulatory authority and that, as a result, any benefit
              which might normally accrue to an investor such as the Purchaser
              by an impartial review of such a registration statement by the SEC
              or other regulatory commission will not be forthcoming; and (iii)
              the Initial Shares, the Second Closing Shares and the Third
              Closing Shares are characterized as "restricted securities" under
              the federal securities laws inasmuch as they are being acquired
              from the Company in a transaction not involving a public offering
              and that under such laws and applicable regulations such
              securities may be resold without registration under the Securities
              Act only in certain limited circumstances. In this connection, the
              Purchaser represents that it is familiar with the Rule 144 under
              the Securities Act, as presently in effect, and understands the
              resale limitations imposed thereby and by the Securities Act.

              5.5.5  The Purchaser acknowledges that (i) it is represented by
              counsel, (ii) it has received and carefully reviewed a copy of the
              Offering Memorandum and this Agreement; (iii) it has received all
              information it considers necessary or appropriate for deciding
              whether to purchase the Initial Shares, the Second Closing Shares
              and the Third Closing Shares; (iv) as a result of its knowledge of
              the telecommunications industry, its study of the aforementioned
              documents and its prior overall experience in financial matters,
              it is properly able to evaluate the capital structure of the
              Company, the business of the Company and its Subsidiaries and the
              risks inherent therein; and (v) it has been given the opportunity
              to obtain any additional information or documents from, and to ask
              questions and receive answers of, the officers and representatives
              of the Company to the extent necessary to evaluate the merits and
              risks related to its investment in the Company.

6.     TRANSFER OF SHARES. The Initial Shares, Second Closing Shares and Third
Closing Shares are not transferable except upon the conditions specified in this
SECTION 6, which conditions are intended to assure compliance with the
provisions of the Securities Act and state securities laws in respect of the
transfer of any of the Initial Shares, Second Closing Shares or the Third
Closing Shares.

              6.1 RESTRICTIVE LEGENDS. Unless and until otherwise permitted by
this Agreement, the Initial Shares, the Second Closing Shares and the Third
Closing Shares issued to the Purchaser pursuant to this Agreement shall be
stamped or otherwise imprinted with legends in substantially the following
forms:


                                          10



                     "THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT
       BEEN REGISTERED OR QUALIFIED UNDER THE SECURITIES ACT OF 1933 OR ANY
       STATE SECURITIES LAWS AND THUS MAY NOT BE TRANSFERRED UNLESS REGISTERED
       OR QUALIFIED UNDER THAT ACT OR SUCH LAWS OR UNLESS AN EXEMPTION FROM
       REGISTRATION OR QUALIFICATION IS AVAILABLE."

                     "SUCH SECURITIES ARE ALSO SUBJECT TO THE RESTRICTIONS ON
       TRANSFER CONTAINED IN A STOCK PURCHASE AGREEMENT, DATED MAY 10, 1999, BY
       AND BETWEEN COMMUNICATION TELESYSTEMS INTERNATIONAL D.B.A. WORLDXCHANGE
       COMMUNICATIONS AND GOLD & APPEL TRANSFER S.A., COPIES OF WHICH MAY BE
       OBTAINED FROM THE SECRETARY OF THE COMPANY."

The Company may order its transfer agents to stop the transfer of any Initial
Shares, Second Closing Shares or Third Closing Shares bearing a legend required
by this SECTION 6.1 until the conditions herein with respect to transfer of such
securities have been satisfied.

              6.2 NOTICE OF PROPOSED TRANSFERS. Subject to SECTION 6.1, prior to
any transfer or attempted transfer of the Initial Shares, Second Closing Shares
or Third Closing Shares bearing the legend in SECTION 6.1, the Purchaser or its
permitted assignee, transferee or donee (the "HOLDER") shall give the Company
written notice of its intention to do so, describing briefly the nature of any
such proposed transfer. If, in the written opinion of counsel for Holder,
addressed to the Company and the Holder, in form and substance reasonably
acceptable to the Company, the proposed transfer may be effected without
registration of such Initial Shares Second Closing Shares or Third Closing
Shares, the Initial Shares Second Closing Shares, or Third Closing Shares
proposed to be transferred may be transferred in accordance with the terms of
said notice and in compliance with applicable state securities laws and
regulations. The Company shall not be required to effect any such transfer prior
to the receipt of such favorable opinion; provided that if the proposed transfer
is governed by Rule 144 promulgated by the SEC, or any successor rule, such
opinion shall not be required, but the Company may prevent such transfer until
it receives evidence satisfactory to it and its counsel that the transfer
complies with Rule 144. Each transfer shall comply with all applicable SEC rules
and applicable state securities laws.

              6.3 PERMITTED TRANSFERS. Notwithstanding anything to the contrary
in this Agreement, Purchaser may transfer the Initial Shares, Second Closing
Shares or Third Closing Shares to any Affiliate of Purchaser in accordance with
the provisions of SECTIONS 6.1 and 6.2; provided that the transferee shall hold
such Initial Shares, Second Closing Shares or Third Closing Shares subject to
the same restrictions applicable to its transferor and shall agree in writing
to be bound by the terms of this Agreement.

7.     CERTAIN COVENANTS.

              7.1 PREEMPTIVE RIGHTS.

              7.1.1 Purchaser shall have the right to subscribe to any
              additional (i) issuances of shares of capital stock of the
              Company, (ii) issuances of securities convertible


                                          11


              into shares of capital stock of the Company, or (iii) grants of
              options to purchase shares of capital stock of the Company, other
              than grants to employees, directors or consultants of the Company
              (and the issuance of shares upon exercise of such options), for
              cash, on the same terms of such offerings to the extent equal to
              the proportion which the number of shares of Stock then held by
              Purchaser bears to the Company's fully-diluted capitalization (on
              an as-converted and as-exercised basis). Such right is exercisable
              within ten (10) days after the receipt of written notice relating
              to such issuances by the Purchaser. Such right extends to the same
              proportion of the new issue of shares, convertible securities or
              options as the Purchaser's proportion of the outstanding shares.

              7.1.2  Purchaser's right to purchase new issues of shares or
              convertible securities or options does not extend to (i) the
              issuance of shares upon the conversion or exercise of options or
              other convertible securities either (A) outstanding on the date
              hereof or (B) with respect to which options or other convertible
              securities Purchaser had preemptive rights under this SECTION 7.1,
              or (ii) securities issued solely in exchange for shares,
              convertible securities or options issued in connection with any
              merger, reorganization or acquisition (including, without
              limitation, shares of Stock to be issued in connection with the
              contemplated acquisition of the minority interest in WorldxChange
              Pty. Ltd.).

              7.1.3  The preemptive rights held by the Purchaser pursuant to
              this SECTION 7.1 supersede and replace the preemptive rights held
              by the Purchaser pursuant to the First Gold & Appel Agreement such
              that the preemptive rights held by the Purchaser pursuant to the
              First Gold & Appel Agreement shall terminate as of the Initial
              Closing.

              7.1.4  The preemptive rights held by the Purchaser pursuant to
              this SECTION 7.1 shall terminate immediately prior to the closing
              of an initial public offering of the Company's securities and
              shall not apply to any issuance of securities in such offering.

              7.2 REGISTRATION RIGHTS. The Company and Purchaser, concurrently
with the Initial Closing, shall execute and deliver the New Registration Rights
Agreement.

              7.3 RULE 144 FILING. After the Company's Common Stock is
registered under the Exchange Act, and until the Initial Shares, Second Closing
Shares and the Third Closing Shares held by Purchaser have all been publicly
sold or are eligible for sale under Rule 144(k) under the Securities Act, the
Company shall use best efforts to file the reports required under Rule 144(c)(1)
under the Securities Act in order to permit sales of the Initial Shares, the
Second Closing Shares and the Third Closing Shares by Purchaser pursuant to Rule
144.

              7.4 CHANGES IN CAPITAL STOCK.

              7.4.1 If, prior to the Initial Closing Date, the Second Closing
              Date, or the Third Closing Date, as applicable, the Stock is
              subdivided, combined or reclassified, or if shares of capital
              stock of the Company are issued as a dividend thereon, the number
              of shares of Stock which constitute the Initial Shares, the Second
              Closing


                                          12

              Shares and the Third Closing Shares (to the extent the relevant
              closing date has not yet occurred), shall be adjusted so that the
              Purchaser shall be entitled to purchase the kind and number of
              shares or other securities of the Company which it would have
              been entitled to receive after the happening of any of the events
              described above, had the Initial Shares, the Second Closing
              Shares, or the Third Closing Shares, as applicable, been purchased
              immediately prior to the happening of such event or any record
              date with respect thereto.

              7.4.2  If, prior to the Initial Closing Date, the Second Closing
              Date or the Third Closing Date, as applicable, there is a
              reclassification of the securities of the Company or a
              consolidation of the Company with or merger of the Company into
              another corporation or in case of a sale or conveyance to another
              corporation of the property, assets or business of the Company as
              an entirety or substantially as an entirety, the Company shall
              provide, or shall cause such successor or purchasing corporation
              to provide, as the case may be, that the Purchaser shall have the
              right thereafter to purchase for the same consideration provided
              in this Agreement, the kind and amount of shares and other
              securities and property which the Purchaser would have owned or
              have been entitled to receive after the happening of such
              reclassification, consolidation, merger, sale or conveyance had
              the Initial Shares, the Second Closing Shares, or the Third
              Closing Shares, as applicable, been purchased immediately prior to
              the happening of such event.

8.     INDEMNIFICATION.

              8.1 OBLIGATIONS OF THE COMPANY. The Company agrees to indemnify
and hold harmless the Purchaser from and against any and all Losses of the
Purchaser based upon or arising from any inaccuracy in or breach or
nonperformance of any of the representations, warranties or covenants made or
obligations undertaken by the Company in this Agreement.

              8.2 OBLIGATIONS OF THE PURCHASER. The Purchaser agrees to
indemnify and hold harmless the Company from and against any and all Losses of
the Company based upon or arising from, any inaccuracy in or breach or
nonperformance of any of the representations, warranties or covenants made by
the Purchaser in this Agreement.

              8.3 PROCEDURE.

              8.3.1  NOTICE. Any party seeking indemnification with respect to
              any Loss shall give notice to the party required to provide
              indemnity hereunder (the "INDEMNIFYING PARTY").

              8.3.2  DEFENSE. If any claim, demand or liability is asserted by
              any third party against any Indemnified Party, the Indemnifying
              Party shall upon the written request of the Indemnified Party,
              defend any actions or proceedings brought against the Indemnified
              Party in respect of matters embraced by the indemnity. If, after a
              request to defend any action or proceeding, the Indemnifying Party
              does not defend the Indemnified Party, a recovery against the
              latter suffered by it in good faith, is conclusive in its favor
              against the Indemnifying Party, provided however that, if the
              Indemnifying Party has not received reasonable notice of the


                                          13



              action or proceeding against the Indemnified Party, or is not
              allowed to control its defense, judgment against the Indemnified
              Party is only presumptive evidence against the Indemnifying Party.
              The parties shall cooperate in the defense of all third party
              claims which may give rise to Indemnifiable Claims hereunder. In
              connection with the defense of any claim, each party shall make
              available to the party controlling such defense, any books,
              records or other documents within its control that are reasonably
              requested in the course of such defense.

              8.4 EXCLUSIVE REMEDY. This SECTION 8 shall be the exclusive remedy
of the parties for any Loss of such party based upon or arising from any
inaccuracy in or breach or nonperformance of any of the representations,
warranties, or covenants made by any other party to this Agreement.
Notwithstanding the foregoing, Purchaser shall have the right to the remedy of
specific performance with respect to SECTIONS 2.1, 3.1, 3.3, 7.1, 7.3 AND 7.4.

9.     GENERAL.

              9.1 AMENDMENTS; WAIVERS. This Agreement and any schedule attached
hereto may be amended only by agreement in writing of all parties. No waiver of
any provision nor consent to any exception to the terms of this Agreement shall
be effective unless in writing and signed by the party to be bound and then only
to the specific purpose, extent and instance so provided.

              9.2 FIRST GOLD & APPEL AGREEMENT. Except as provided in SECTION
7.1 or as otherwise expressly provided in this Agreement, the terms and
provisions of the First Gold & Appel Agreement (i) are hereby ratified and
confirmed, (ii) shall continue in full force and effect, and (iii) shall be
unaffected by any provisions of this Agreement.

              9.3 SURVIVAL OF REPRESENTATIONS AND WARRANTIES. Except as set
forth in the following sentence, all representations and warranties of the
Company and the Purchaser set forth in this Agreement or expressly incorporated
herein by reference shall, as of the first anniversary of the date of this
Agreement, expire and terminate and be of no further force or effect.
Notwithstanding the foregoing, (i) the representations and warranties set forth
in SECTION 4.7 (Accuracy of Information) shall survive until the thirtieth day
following delivery by the Company to the Purchaser of audited financial
statements for the fiscal year ended September 30, 1999, and (ii) the
representations and warranties set forth in SECTION 4.2 (Capital Stock and
Related Matters) shall survive indefinitely. As of the termination of the
respective representations, warranties and covenants as provided in this
Agreement, the Company and the Purchaser shall be deemed to have irrevocably
waived and released any and all rights and remedies any of them may have with
respect to any inaccuracy in or breach or nonperformance of any of the
representations, warranties or covenants made by any party to this Agreement.

              9.4 SCHEDULES; EXHIBITS; INTEGRATION. Each schedule and exhibit
delivered pursuant to the terms of this Agreement shall be in writing and shall
constitute a part of this Agreement. This Agreement, together with such
schedules and exhibit, constitutes the entire agreement among the parties
pertaining to the subject matter hereof and supersedes all prior agreements and
understandings of the parties in connection therewith.

              9.5 BEST EFFORTS; FURTHER ASSURANCES.


                                          14



              9.5.1  STANDARD. Each party will use its best efforts to fulfill
              all obligations on its part to be performed and fulfilled under
              this Agreement, to the end that the transactions contemplated by
              this Agreement shall be effected substantially in accordance with
              its terms as soon as reasonably practicable. The parties shall
              cooperate with each other in such actions and in securing
              requisite Approvals. Each party shall deliver such further
              documents and take such other actions as the other party may
              reasonably request to consummate or implement the transactions
              contemplated hereby or to evidence such events or matters.

              9.5.2  LIMITATION. As used in this Agreement, the term "best
              efforts" shall not mean efforts which require the performing party
              to do any act that is unreasonable under the circumstances, to
              make any capital contribution or to expend any funds other than
              reasonable out-of-pocket expenses incurred in satisfying its
              obligations hereunder, including but not limited to the fees,
              expenses and disbursements of its accountants, actuaries, counsel
              and other professionals.

              9.6 GOVERNING LAW AND FORUM SELECTION. This Agreement is to be
construed and enforced in accordance with the internal laws of the State of
California. The parties consent to the jurisdiction of all federal and state
courts in California. Any civil action or other legal proceeding arising out of
or relating to this Agreement shall be brought and heard only in a federal or
state court located in California, and all parties waive any right to have such
action or proceeding transferred to another location.

              9.7 NO ASSIGNMENT. Neither this Agreement nor any rights or
obligations under it are assignable, except pursuant to a permitted transfer by
Purchaser in accordance with SECTION 6.3 above.

              9.8 HEADINGS. The descriptive headings of the Sections and
Subsections of this Agreement are for convenience only and do not constitute a
part of this Agreement.

              9.9 COUNTERPARTS. This Agreement and any amendment hereto or any
other document delivered pursuant hereto may be executed in one or more
counterparts and by different parties in separate counterparts. All of such
counterparts shall constitute one and the same agreement (or other document) and
shall become effective (unless otherwise provided therein) when one or more
counterparts have been signed by each party and delivered to the other party.

              9.10   PUBLICITY AND REPORTS. The Company and the Purchaser shall
coordinate all publicity relating to the transactions contemplated by this
Agreement and no party shall issue any press release, publicity statement or
other public notice relating to this Agreement, or the transactions contemplated
by this Agreement, without obtaining the prior written consent of each of the
parties to this Agreement except to the extent that a particular action is
required by applicable Law.

              9.11   CONFIDENTIALITY. All information disclosed by any party (or
its representatives) whether before or after the date hereof, in connection with
the transactions contemplated by, or the discussions and negotiations preceding,
this Agreement to any other party (or its representatives) shall be kept
confidential by such other party and its representatives


                                          15


and shall not be used by any such Persons other than as contemplated by this
Agreement, except to the extent that such information (i) was known by the
recipient when received, (ii) it is or hereafter becomes lawfully obtainable
from other sources, (iii) is necessary or appropriate to disclose to a
Governmental Entity having jurisdiction over the parties, provided that the
disclosing party give reasonable notice to the other parties and the opportunity
to protect any such confidential information, (iv) as may otherwise be required
by Law or (v) to the extent such duty as to confidentiality is waived in writing
by the other party.

              9.12   PARTIES IN INTEREST. This Agreement shall be binding upon
and inure to the benefit of each party, and nothing in this Agreement, express
or implied, is intended to confer upon any other Person any rights or remedies
of any nature whatsoever under or by reason of this Agreement. Nothing in this
Agreement is intended to relieve or discharge the obligation of any third person
to any party to this Agreement.

              9.13   NOTICES. Any notice or other communication hereunder must
be given in writing and (i) delivered in person, (ii) transmitted by telex,
telefax or telecommunications mechanism or (iii) mailed by certified or
registered mail, postage prepaid), receipt requested as follows:

              IF TO PURCHASER, ADDRESSED TO:

              Gold & Appel Transfer S.A.
              P.O. Box 985
              Wickhams Cay Road Town
              Tortula, British Virgin Islands

              WITH A COPY TO:

              Mr. Walt Anderson
              Entree International
              3050 K Street, N.W., Suite 250
              Washington, D.C. 20036
              Facsimile No: (202) 736-5065

              IF TO THE COMPANY, ADDRESSED TO:

              WORLDxCHANGE
              9999 Willow Creek Road
              San Diego, California 92131
              Attn: Legal Department
              Facsimile No: (619) 452-3780

              WITH A COPY TO:

              O'Melveny & Myers LLP
              610 Newport Center Drive
              Newport Beach, California 92660
              Attn: David A. Krinsky, Esq.
              Facsimile No: (949) 823-6994


                                          16



or to such other address or to such other person as either party shall have last
designated by such notice to the other party. Each such notice or other
communication shall be effective (A) if given by telecommunication, when
transmitted to the applicable number so specified in (or pursuant to) this
SECTION 9.13 and an appropriate answer back is received, (B) if given by mail,
three days after such communication is deposited in the mails with first class
postage prepaid, addressed as aforesaid or (C) if given by any other means, when
actually received at such address.

              9.14   EXPENSES. Each party shall pay its own expenses incident to
the negotiation, preparation and performance of this Agreement and the
transactions contemplated hereby, including but not limited to the fees,
expenses and disbursements of such party's respective investment bankers,
accountants and counsel.

              9.15   WAIVER. No failure on the part of any party to exercise or
delay in exercising any right hereunder shall be deemed a waiver thereof, nor
shall any single or partial exercise preclude any further or other exercise of
such or any other right.

              9.16   REPRESENTATION BY COUNSEL; INTERPRETATION. The Company and
the Purchaser each acknowledge that each party to this Agreement has been
represented by counsel in connection with this Agreement and the transactions
contemplated by this Agreement. Accordingly, any rule of Law, including but not
limited to Section 1654 of the California Civil Code, or any legal decision that
would require interpretation of any claimed ambiguities in this Agreement
against the party that drafted it has no application and is expressly waived.
The provisions of this Agreement shall be interpreted in a reasonable manner to
effect the intent of the Purchaser and the Company.

              9.17   SEVERABILITY. If any provision of this Agreement is
determined to be invalid, illegal or unenforceable by any Governmental Entity,
the remaining provisions of this Agreement to the extent permitted by Law shall
remain in full force and effect provided that the economic and legal substance
of the transactions contemplated is not affected in any manner materially
adverse to any party. In event of any such determination, the parties agree to
negotiate in good faith to modify this Agreement to fulfill as closely as
possible the original intents and purposes hereof.

              9.18   NO CONSEQUENTIAL DAMAGES. Notwithstanding anything to the
contrary elsewhere in this Agreement, no party (or its Affiliates) shall, in any
event, be liable to any other party (or its Affiliates) for any consequential
damages, including, but not limited to, loss  of revenue or income, or loss of
business reputation or opportunity relating to the breach or alleged breach of
this Agreement. The foregoing shall not be deemed to limit Purchaser's right to
specific performance with respect to SECTIONS 2.1, 3.1, 3.3, 7.1, 7.3 and 7.4.


                      [BALANCE OF PAGE LEFT INTENTIONALLY BLANK]


                                          17



              IN WITNESS WHEREOF, each of the parties hereto has caused this
Agreement to be executed by its duly authorized officers as of the day and year
first above written.

COMPANY:                           PURCHASER:

COMMUNICATION TELESYSTEMS          GOLD & APPEL TRANSFER S.A., a
INTERNATIONAL D.B.A.               British Virgin Islands corporation
WORLDXCHANGE
COMMUNICATIONS,
a California corporation

By:    /s/ Roger B. Abbott                By:    /s/ [ILLEGIBLE]
       -------------------------          -----------------------------------

Its:          CEO                  Its:   Power of Attorney in Fact
       -------------------------          -----------------------------------


                                          18




                    LIST OF OMITTED SCHEDULES AND EXHIBITS

     The following Schedules and Exhibits to the Stock Purchase Agreement
dated May 10, 1999 (Gold & Appel Transfer S.A.) have been omitted from this
Exhibit and shall be furnished supplementally to the Commission upon request:

     Schedule 4.2 - Equity Securities

     Schedule 4.14 - Directors and Officers Liability Insurance

     Exhibit A - New Registration Rights Agreement

     Exhibit B - Form of Opinion of O'Melveny & Myers LLP - Initial Closing

     Exhibit C - Form of Opinion of O'Melveny & Myers LLP - Second Closing

     Exhibit D - Form of Opinion of O'Melveny & Myers LLP - Third Closing