NEITHER THIS WARRANT NOR THE SECURITIES ISSUABLE UPON EXERCISE OF THIS
  WARRANT HAVE BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED
  (THE "1933 ACT"), OR ANY STATE SECURITIES LAW, AND NEITHER THIS WARRANT NOR
  SUCH SECURITIES MAY BE TRANSFERRED OR OTHERWISE DISPOSED OF UNLESS THEY HAVE
  BEEN REGISTERED UNDER THE ACT OR SUCH SECURITIES LAWS OR UNLESS AN EXEMPTION
  FROM SUCH REGISTRATION IS AVAILABLE.

               COMMUNICATION TELESYSTEMS INTERNATIONAL D.B.A.
                       WORLDXCHANGE COMMUNICATIONS

                    WARRANT TO PURCHASE COMMON STOCK

No. W-1                                                 Date: December 31, 1998

              EXERCISABLE COMMENCING ON THE DATE OF ISSUANCE
                HEREOF AND ENDING ON THE EXPIRATION DATE


          Communication TeleSystems International d.b.a. WorldxChange
Communications, a California corporation (the "COMPANY"), certifies for value
received that Gold & Appel Transfer S.A., a British Virgin Islands
corporation, or its registered assigns is, subject to and in accordance with
the terms and conditions herein set forth, the registered holder
("WARRANTHOLDER") of a warrant to purchase up to Twenty Thousand (20,000)
shares (as adjusted from time to time in accordance with this Warrant) (the
"WARRANT SHARES"), of the Company's Common Stock, no par value ("COMMON
STOCK"), at an exercise price determined as provided hereinafter (such
exercise price per share as adjusted from time to time being referred to
herein as the "EXERCISE PRICE"), at any time prior to the Expiration Date (as
defined in SECTION 1) at the Company's principal executive office, with the
appropriate form of Election to Purchase set forth herein, duly executed and
by paying in full the Exercise Price, plus transfer taxes, if any, in the
manner set forth in SECTION 1.

     1.   EXERCISE; EXPIRATION AND TERMINATION. Subject to adjustment
pursuant to SECTION 3, the initial Exercise Price shall be $12.05. This
Warrant may be exercised from time to time, in whole or in part, at the
Company's principal executive office from the date hereof until 5:00 p.m.,
San Diego, California time on December 15, 2001 (the "EXPIRATION DATE"), by
delivering a duly completed and executed Election to Purchase in the form
attached hereto (indicating the number of the Warrant Shares to be purchased)
and paying in full the applicable Exercise Price, plus transfer taxes, if
any, in cash or by wire transfer or cashier's check payable to the order of
the Company.

     2.   ISSUANCE OF SHARE CERTIFICATES. Upon surrender of this Warrant,
delivery of a duly completed and executed form of Election to Purchase and
payment of the applicable Exercise Price, the Company shall issue
certificates representing the Warrant Shares ("SHARE CERTIFICATES") in the
name of the tendering Warrantholder or its designee and deliver the Share

                                     1


Certificates to the tendering Warrantholder or its designee, together with a
new Warrant for any portion of this Warrant not exercised. If the securities
of the Company deliverable upon exercise of this Warrant have not been
registered for resale under the 1933 Act, any Share Certificate delivered
shall bear appropriate private placement legends thereon, including, without
limitation, a legend in substantially the following form:

     "THE SECURITIES REPRESENTED BY THIS CERTIFICATE
     HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT
     OF 1933, AS AMENDED (THE "1933 ACT"), OR ANY
     STATE SECURITIES LAW, AND MAY NOT BE TRANSFERRED
     OR OTHERWISE DISPOSED OF UNLESS THEY HAVE BEEN
     REGISTERED UNDER THE 1933 ACT OR SUCH SECURITIES
     LAWS OR UNLESS AN EXEMPTION FROM SUCH REGISTRATION
     IS AVAILABLE."

     3.   ADJUSTMENTS TO EXERCISE PRICE AND NUMBER OF WARRANT SHARES. The
Exercise Price and the number of Warrant Shares purchasable upon the exercise
of this Warrant are subject to adjustment from time to time upon the
occurrence of the events specified in this SECTION 3.

               3.1  ADJUSTMENTS FOR STOCK SPLITS AND COMBINATIONS. If, while
     this Warrant is outstanding, the Company effects a subdivision of the
     outstanding Common Stock, the Exercise Price then in effect shall be
     proportionately decreased and the number of Warrant Shares issuable upon
     exercise of this Warrant shall be increased in proportion to such
     increase of outstanding Common Stock, and conversely, if, while this
     Warrant is outstanding, the Company combines the outstanding Common
     Stock, the Exercise Price then in effect shall be proportionately
     increased and the number of Warrant Shares issuable upon exercise of
     this Warrant shall be decreased in proportion to such decrease in
     outstanding Common Stock. Any adjustment under this SECTION 3.1 shall
     become effective as of the record date for such event and if such
     subdivision or combination is not consummated in full the Exercise Price
     and the number of Warrant Shares shall be readjusted accordingly. For
     purposes of this SECTION 3.1, a stock dividend shall be considered a
     stock split.

               3.2  ADJUSTMENTS FOR OTHER DIVIDENDS AND DISTRIBUTIONS. If,
     while this Warrant is outstanding, the Company makes a dividend or other
     distribution payable in securities of the Company other than shares of
     Common Stock, then and in each event provision shall be made so that the
     Warrantholder shall receive upon exercise of this Warrant (but only to
     the extent this Warrant is exercised), in addition to the Warrant Shares
     receivable thereupon, the amount of securities of the Company which the
     Warrantholder would have received had it owned such Warrant Shares on
     the date of such event.

               3.3  ADJUSTMENT FOR RECLASSIFICATION, EXCHANGE AND
     SUBSTITUTION. If the Warrant Shares issuable upon exercise of this
     Warrant are changed into the same or a different number of shares of the
     same or any other class or classes of stock,


                                     2


     whether by recapitalization, reclassification or otherwise (other than a
     subdivision or combination of shares provided for in SECTION 3.1), then
     and in any such event the Warrantholder shall have the right thereafter,
     upon exercise of this Warrant, to receive in lieu of Warrant Shares the
     kind and amount of stock and other securities and property receivable
     upon such recapitalization, reclassification or other change, in an
     amount equal to the amount that the Warrantholder would have been entitled
     to had this Warrant been exercised to such extent prior to such event.

           3.4  DETERMINATION OF ADJUSTMENT. Any determination as to whether
     an adjustment is required to be made under SECTION 3 to (i) the Exercise
     Price in effect hereunder, (ii) the number of Warrant Shares issuable upon
     exercise of this Warrant, or (iii) as to the amount of any such adjustment
     described in clauses (i) or (ii) of this SECTION 3.4, shall be binding
     upon the Warrantholder and the Company if made in good faith by the
     Company's Board of Directors.

     4.  FRACTIONAL WARRANTS AND FRACTIONAL SHARES. The Company shall not be
required to issue fractional shares of Common Stock on the exercise of this
Warrant or issue fractions of warrants on any distribution of warrants to the
Warrantholder or distribute warrant certificates that evidence fractional
warrants. If more than one warrant shall be presented for exercise in full
at the same time by the same Warrantholder, the number of full shares of
Common Stock which shall be issuable upon the exercise thereof shall be
computed on the basis of the aggregate number of shares of Common Stock
represented by the warrants so presented. If any fraction of a share would,
except for the provisions of this SECTION 4, be issuable on the exercise of
any warrant (or specified portion thereof), the Company shall pay an amount
in cash equal to the same fraction of the then current fair market value of a
full share of Common Stock, as determined in good faith by the Company's
Board of Directors, unless the Company has then listed shares of its Common
Stock for trading on a national securities exchange or for quotation on The
Nasdaq Stock Market, in which case the current fair market value shall be the
most recent closing sale price of or the last sale price paid for, shares of
Common Stock, respectively, which occurred prior to the day on which the
Warrant was exercised.

     5.  EXCHANGE OF WARRANT. This Warrant may be divided or combined upon
request to the Company by the Warrantholder, into a certificate or
certificates representing the right to purchase the same aggregate number of
Warrant Shares. Unless the context indicates otherwise, the term
"WARRANTHOLDER" shall include any transferee or transferees of this Warrant
and the term "WARRANT" shall include any and all warrants issued upon
division, exchange, substitution or transfer of this Warrant.

     6.  MUTILATED OR MISSING WARRANT. If this Warrant shall be mutilated,
lost, stolen or destroyed, the Company shall issue and deliver, in exchange
and substitution for and upon cancellation of the mutilated Warrant, or in
lieu of and substitution for the lost, stolen or destroyed Warrant, a new
warrant of like tenor, but only upon receipt of evidence reasonably
satisfactory to the Company of such loss, theft or destruction of this
Warrant and an indemnity or bond, if requested, reasonably satisfactory to
the Company. The applicant shall also comply

                                      3


with such other reasonable regulations and pay such other reasonable
administrative charges as the Company may prescribe.

     7.  NO IMPAIRMENT. The Company will not hereafter reorganize, dissolve
or take any other voluntary action, a primary purpose or effect of which is
to avoid or seek to avoid the observance or performance of any of the terms
of this Warrant.

     8.  RESERVATION AND ISSUANCE OF WARRANT SHARES. The Company represents
and warrants that (i) there have been reserved, and the Company shall at all
times keep reserved so long as this Warrant remains outstanding, out of its
authorized capital a number of shares of Common Stock sufficient to provide
for the exercise of the rights of purchase represented by this Warrant, and
(ii) the Common Stock issued upon exercise of this Warrant will, upon
issuance in accordance with the terms of this Warrant, be duly and validly
issued, fully paid and nonassessable shares of Common Stock.

     9.  PAYMENT OF TAXES. The Company will pay all documentary stamp taxes
attributable to the initial issuance of Common Stock issuable upon the
exercise of this Warrant; PROVIDED, HOWEVER, that the Company shall not be
required to pay any tax or other charges that may be payable in respect of
any transfer involved in the issuance of any warrants or any Share
Certificates in a name other than that of the Warrantholder of record, and
the Company shall not be required to issue or deliver such Share Certificates
unless and until the person or persons requesting the issuance thereof shall
have paid to the Company the amount of such tax or shall have established to
the reasonable satisfaction of the Company that such tax has been paid.

    10.  RESTRICTIONS ON TRANSFER. The Warrantholder, by its acceptance
hereof, represents, warrants, covenants and agrees, and upon the exercise of
this Warrant shall be deemed to have represented, warranted, covenanted and
agreed as of the date of such exercise, that (i) the Warrantholder has
sufficient knowledge of the business and affairs of the Company and the
Company has made available to the Warrantholder or its agents all documents
and information relating to an investment in the Warrant Shares requested by
or on behalf of the Warrantholder; (ii) the Warrantholder is acquiring the
Warrant Shares for investment for its or his own account, and not with a view
to or for sale in connection with any distribution thereof; (iii) the
Warrantholder understands that the Warrant Shares to be purchased have not
been registered pursuant to the 1933 Act or any state securities laws, and
the offer and sale of the Warrant Shares is intended to be exempt from
registration under the 1933 Act and under applicable state securities laws,
which exemption depends upon, among other things, the bona fide nature of the
investment intent and the accuracy of the Warrantholder's representations as
expressed herein; (iv) if the Warrant Shares are not listed for trading on a
national securities exchange or quoted on The Nasdaq Stock Market, the
Warrantholder understands that no public market exists for the Warrant Shares
and that there is no assurance that a public market will ever exist for the
Warrant Shares; (v) the Warrantholder has such knowledge and experience in
financial and business matters so as to be capable of evaluating the merits
and risks of its investment in the Warrant Shares, and the Warrantholder is
capable of bearing the economic risks of such investment, including the risk
of loss of its entire investment in the Warrant Shares; and (vi) absent an
effective registration statement under the 1933 Act (and/or compliance with
any applicable state securities law registration requirements) covering the

                                      4


disposition of this Warrant or the Warrant Shares issued or issuable upon
exercise of this Warrant, neither this Warrant nor the Warrant Shares issued or
issuable upon exercise of this Warrant may be sold, transferred, assigned,
hypothecated or otherwise disposed of without first providing the Company with
evidence reasonably satisfactory to the Company that such sale, transfer,
assignment, hypothecation or other disposal will be exempt from the registration
and prospectus delivery requirements of applicable Federal and state securities
laws and regulations.

     11.  NO RIGHTS AS A SHAREHOLDER. Nothing contained herein shall be
construed as conferring upon the Warrantholder any rights whatsoever as a
shareholder of the Company, including the right to vote, to receive dividends
(except as provided in SECTION 3.2), to consent or to receive notices as a
shareholder in respect of any meeting of shareholders for the election of
directors of the Company or any other matter. If, however, at any time prior to
the expiration of this Warrant and prior to its exercise, any of the following
events shall occur:

          (i)  any action which would require an adjustment pursuant to SECTION
3; or

          (ii) a dissolution, liquidation or winding up of the Company (other
than in connection with a consolidation, merger or sale of its property, assets
and business, as an entirety) shall be proposed;

          then in any one or more of said events, the Company shall give notice
in writing of such event to the Warrantholder at least 15 days prior to the
date fixed as a record date or the date of closing the transfer books or other
applicable date with respect thereto. Such notice shall specify such record date
or the date of closing the transfer books, as the case may be.

     12.  "MARKET STAND-OFF" AGREEMENT. The Warrantholder hereby agrees that it
shall not, to the extent requested by the Company and an underwriter of Common
Stock (or other securities) of the Company, sell or otherwise transfer or
dispose of this Warrant or any Warrant Shares in a market transaction during a
period deemed by the underwriter (in its sole judgment) to be necessary or
appropriate following the effective date of a registration statement of the
Company filed under the 1933 Act, provided that Roger B. Abbott, Rosalind
Abbott, and Edward S. Soren are subject to such an agreement for the same
period. In order to enforce the foregoing covenant, the Company may impose
stop-transfer instructions with respect to this Warrant and the Warrant Shares
until the end of such period.

     13.  NOTICE. 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 WARRANTHOLDER, ADDRESSED TO:

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


                                          5



          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) 625-0217

     14.  SUPPLEMENTS AND AMENDMENTS. Neither this Warrant nor any term hereof
may be changed or waived except pursuant to an instrument in writing signed by
the party against which enforcement of the change or waiver is sought.

     15.  SUCCESSORS. All the representations, warranties, agreements, covenants
and provisions of this Warrant by or for the benefit of the Company or the
Warrantholder shall bind and inure to the benefit of their respective permitted
successors and assigns hereunder.

     16.  GOVERNING LAW. This Warrant shall be construed for all purposes in
accordance with the laws of the State of California, without regard to conflicts
of law principles thereof.

     17.  BENEFITS OF THIS WARRANT. Nothing in this Warrant shall be construed
to give to any person or entity other than the Company and the Warrantholder
any legal or equitable right, remedy or claim under this Warrant; and this
Warrant shall be for the sole and exclusive benefit of the Company and the
Warrantholder.

     18.  INVALIDITY OF PROVISIONS. If any provision of this Warrant is or
becomes invalid, illegal or unenforceable in any respect, such provision shall
be deemed amended to the extent necessary to cause it to express the intent of
the parties to the maximum possible extent and be valid, legal and enforceable.
The invalidity or deemed amendment of such provision shall not affect the
validity, legality or enforceability of any other provision hereof.

     19.  SECTION HEADINGS. The section headings contained in this Warrant are
for convenience only and shall be without substantive meaning or content.


                     [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]


                                      6



          IN WITNESS WHEREOF, the Company has caused this Warrant to be duly
executed and its corporate seal to be impressed hereon and attested by its
Secretary, as of the day and year first above written.

               COMMUNICATION TELESYSTEMS INTERNATIONAL D.B.A.
               WORLDXCHANGE COMMUNICATIONS

               By:    /s/ Edward S. Soren
                      -----------------------------

               Name   Edward S. Soren
                      -----------------------------

               Title  Executive Vice President
                      -----------------------------


ACCEPTED AND AGREED TO:
- -----------------------

GOLD & APPEL TRANSFER S.A.

By:   /s/ Walt Anderson
      -------------------------
Name  Walt Anderson
      -------------------------
Title Power of Attorney in Fact
      -------------------------






                                          7



                               List of Omitted Exhibits

          The following Exhibits to the Warrant Purchase Agreement have been
omitted from this Exhibit and shall be furnished supplementally to the
Commission upon request:

          Exhibit A - Form of Election to Purchase

          Exhibit B - Form of Assignment