<PAGE>   1
                                                                   EXHIBIT 10.28




THE SECURITIES EVIDENCED HEREBY HAVE BEEN ACQUIRED FOR INVESTMENT PURPOSES ONLY
AND HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED. SUCH
SECURITIES MAY NOT BE SOLD, ASSIGNED, TRANSFERRED, PLEDGED OR HYPOTHECATED
UNLESS REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR UNLESS THE
COMPANY HAS RECEIVED AN OPINION OF ITS COUNSEL OR COUNSEL REASONABLY
SATISFACTORY TO THE COMPANY THAT SUCH REGISTRATION IS NOT REQUIRED.

                        LONG DISTANCE INTERNATIONAL INC.,

                              A FLORIDA CORPORATION

                               WARRANT CERTIFICATE

              Class A Bridge Loan Warrant to Purchase Common Stock
              ----------------------------------------------------

                  Long Distance International Inc., a Florida Corporation (the
"Company"), hereby certifies that, for value received, World Access, Inc., a
Delaware corporation, with offices at Resurgens Plaza - Suite 2210, 945 East
Paces Ferry Road, Atlanta, Georgia 30326 (the "Holder"), is entitled to purchase
from the Company [number]1 of fully paid, validly issued and non-assessable
shares of common stock, par value $0.001 per share, of the Company ("Common
Stock") at an exercise price of $0.001 per share (the "Exercise Price") at any
time or from time to time from and after the Initial Exercise Date up to and
including October 19, 2004. This Warrant is one of a series of warrants
designated the Class A Bridge Loan Warrants to Purchase Common Stock ("Class A
Warrants") and has been issued with a companion warrant in a series designated
the Class B Bridge Loan Warrants to Purchase Common Stock ("Class B Warrants").
The Class A Warrants and the Class B Warrants are being issued to the initial
holders thereof pursuant to that certain Term Loan Agreement, dated as of July
20, 1999 ("Term Loan Agreement"), as additional consideration for, and as an
inducement to make, the Term Loans (as defined therein). Pursuant to the terms
of the Class B Warrants, the Class B Warrants shall become void and of no
further force and effect in the event that the loans outstanding under the Term
Loan Agreement are repaid on or prior to February 19, 2000. The number of shares
of Common Stock to be received upon the exercise of this Warrant may be adjusted
from time to time as provided herein.

                  Section 1. EXERCISE OF WARRANT. This Warrant may be exercised
in whole or in part at any time or from time to time on or after the Initial
Exercise Date of this Warrant;

----------------------
        (1) This number ("ws") will be determined in accordance with the
            following formula:

                            P
                    WS = (-----)(OS)
                          1 - P

                  p = the product of (a) 0.30, multiplied by (b) the quotient of
         the amount of the Term Loan made by the Holder divided by $40 million,

                  os = 87,805,899, the number of outstanding shares of the
         Company on a fully diluted basis immediately prior to the initial
         closing under the Term Loan Agreement.



<PAGE>   2

provided, however, that if the day of exercise is a day on which banking
institutions in the State of Florida are authorized by law to close, then the
exercise by the Holder shall be deemed to take place on the next succeeding day
that is not such a bank closing day. The Initial Exercise Date shall mean the
date on which the first to occur of the following events has occurred: (a) the
sixteenth month anniversary date of the issuance of this Warrant; (b) the date
the Company consummates an initial public offering of shares of Common Stock
pursuant to an effective registration statement under the Securities Act of
1933; (c) the date the Company consummates a sale of all or a substantial
portion of the business of the Company and its consolidated subsidiaries taken
as a whole, whether by way of merger, consolidation, sale of assets or sale of
capital stock; (d) the date a bankruptcy petition is filed by or against the
Company, LDI Acquisition Sub Inc. or a material operating subsidiary of LDI
Acquisition Sub Inc.; (e) the effective date of a waiver under the Indenture,
dated as of April 13, 1998 (the "Indenture"), pursuant to which the Company's 12
1/4% Senior Notes Due 2008 were issued, the effect of which waiver would be to
waive the requirement that the Company repurchase the Notes pursuant to Section
4.12 of the Indenture because of a Change of Control (as defined in the
Indenture); and (f) the date on which the exercise of all Class A Warrants and
all Class B Warrants would not result in a Change of Control; (g) the date on
which a Change of Control under the Indenture occurs for a reason other than an
exercise of any of the Class A Warrants or Class B Warrants issued under the
Term Loan Agreement and a waiver with respect thereto described in clause (e)
above is not obtained; and (h) the date on which Clifford Friedland and David
Glassman cease to be directors of the Company (other than by reason of their
death or disability) or beneficially own in the aggregate less than 5,000,000
shares of Common Stock. This Warrant shall be exercised by presentation and
surrender of this Warrant to the Company at its principal office, with the
Exercise Form annexed hereto as EXHIBIT A duly executed by the Holder,
accompanied by payment in full of an amount equal to the product of the number
of shares of Common Stock being purchased by the Holder hereunder and one-tenth
of one cent ($0.001). Payment for such shares shall be made to the Company in
U.S. dollars in cash, by wire transfer or by certified or official bank check
payable to the order of the Company. Promptly after each such exercise of this
Warrant, the Company shall issue and deliver to the Holder a certificate or
certificates for the Common Stock issuable upon such exercise, registered in the
name of the Holder. If this Warrant should be exercised in part only, the
Company shall, upon surrender of this Warrant for cancellation, promptly execute
and deliver a new Warrant, in substantially the form of this Warrant, evidencing
the rights of the Holder thereof to purchase the balance of the Common Stock
purchasable hereunder. Upon the last to occur of receipt by the Company of this
Warrant at its office in proper form for exercise, together with a duly executed
Exercise Form, and receipt by the Company of full payment of the exercise price
for the shares of Common Stock then being purchased hereunder, in accordance
with the terms hereof, (i) the Holder shall be deemed to be the holder of record
of the shares of Common Stock issuable upon such exercise, notwithstanding that
the stock transfer books of the Company shall then be closed or that
certificates representing such shares of Common Stock shall not then be
physically delivered to the Holder, and (ii) such shares of Common Stock shall
be fully paid and non-assessable and free from all preemptive rights of any
shareholder and all taxes, liens and charges, with respect to the issue thereof.
The Company shall pay any stamp or issue taxes payable in connection with
issuance of Common Stock under this Warrant.

                  Section 2. FRACTIONAL SHARES. No fractional shares or scrip
representing fractional shares shall be issued upon the exercise of this
Warrant. With respect to any fraction




                                       2

<PAGE>   3

of a share called for upon any exercise hereof, the Company shall pay to the
Holder an amount in cash (rounded to the nearest cent) equal to such fraction
multiplied by one-tenth of one cent ($0.001) provided such amount is no less
than one cent.

                  Section 3. LOSS OF WARRANT. Upon receipt by the Company of
evidence satisfactory to it of the loss, theft, destruction or mutilation of
this Warrant (including any reasonable written certification that the Company
may require), and (in the case of loss, theft or destruction) of an agreement
indemnifying the Company in a form reasonably satisfactory to it, and (in the
case of mutilation) upon surrender and cancellation of this Warrant, the Company
shall execute and deliver to the Holder a new Warrant of like terms and date.

                  Section 4. RIGHTS OF THE HOLDER. This Warrant shall not
entitle the Holder hereof to any voting or other rights of a shareholder of the
Company, either at law or in equity, or to any notice of meetings of
shareholders or of any other proceedings of the Company, except as provided in
this Warrant, and except in connection with Common Stock that the Holder
purchases as provided herein. No provision of this Warrant, in the absence of
the purchase by the Holder of Common Stock hereunder, shall give rise to any
liability of such Holder for the exercise price or as a shareholder of the
Company, whether to the Company or creditors of the Company. The shares of
Common Stock issued upon exercise of this Warrant shall be subject to a stop
transfer order and the certificate or certificates evidencing such shares shall
bear the following legend:

                  "THE SHARES REPRESENTED BY THIS CERTIFICATE HAVE BEEN
                  REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE
                  "ACT"), PURSUANT TO A REGISTRATION STATEMENT FILED WITH THE
                  SECURITIES AND EXCHANGE COMMISSION. HOWEVER, SUCH SHARES MAY
                  NOT BE OFFERED OR SOLD EXCEPT PURSUANT TO (i) A POST-EFFECTIVE
                  AMENDMENT TO SUCH REGISTRATION STATEMENT, (ii) A SEPARATE
                  REGISTRATION STATEMENT UNDER SUCH ACT, OR (iii) AN EXEMPTION
                  FROM REGISTRATION UNDER SUCH ACT."

and shall bear all legends as required pursuant to the other agreements to which
such Holder and the Company are a party. Any holder of any such certificate or
instrument bearing the foregoing legend shall be entitled to promptly receive
from the Company, without expense, a new certificate or instrument of identical
tenor representing the same kind of securities and the same number or other
amount thereof not bearing such legend if such securities shall have been
effectively registered under the Act and are sold or otherwise disposed of in
accordance with the intended method of disposition by the seller thereof set
forth in the registration statement, or such securities may be freely
transferred by such holder by reason of an exemption from registration under the
Act, or such legend otherwise is not required in order to ensure compliance with
the Act. The opinion of Loeb & Loeb LLP or other legal counsel selected by such
holder and reasonably satisfactory to the Company with respect to any of the
foregoing or with respect to any question concerning whether any proposed
transfer of any shares of common stock would violate the Act, shall be
sufficient to determine the issue.




                                       3
<PAGE>   4

Section 5. ADJUSTMENTS.

                  (a) ADJUSTMENT OF PRICE AND NUMBER OF COMMON STOCK. The
initial Exercise Calculation Price per share shall be one-tenth of one cent
($0.001). The Exercise Calculation Price shall be subject to adjustment from
time to time as provided in Section 5(b), (c) and (h). Upon each adjustment, the
Holder shall thereafter be entitled to purchase, at one-tenth of one cent
($0.001), the number of shares of Common Stock obtained by multiplying the
Exercise Calculation Price in effect immediately prior to such adjustment by the
number of shares of Common Stock issuable upon exercise of this Warrant
immediately prior to such adjustment, and dividing the product thereof by the
Exercise Calculation Price resulting from such adjustment.

                  (b) ADJUSTMENT FOR STOCK SPLITS AND COMBINATIONS. If the
Company at any time or from time to time after the date of this Warrant (the
"Commitment Date") effects a subdivision of the outstanding Common Stock of the
Company, the Exercise Calculation Price then in effect immediately before that
subdivision shall be proportionately decreased; and conversely, if the Company
at any time or from time to time after the Commitment Date combines the
outstanding shares of Common Stock into a smaller number of shares, the Exercise
Calculation Price then in effect immediately before the combination shall be
proportionately increased. Any adjustment under this subsection (b) shall become
effective at the close of business on the date the subdivision or combination
becomes effective.

                  (c) ADJUSTMENTS FOR CERTAIN DIVIDENDS AND DISTRIBUTIONS. If
the Company at any time after the Commitment Date makes, or fixes a record date
for the determination of holders of Common Stock entitled to receive, a dividend
or other distribution payable in additional shares of Common Stock, then and in
each such event the Exercise Calculation Price then in effect shall be decreased
as of the time of such issuance or, in the event such record date is fixed, as
of the close of business on such record date, by multiplying the Exercise
Calculation Price then in effect by a fraction (1) the numerator of which is the
total number of shares of Common Stock issued and outstanding immediately prior
to the time of such issuance or the close of business on such record date, and
(2) the denominator of which shall be the total number of shares of Common Stock
issued and outstanding immediately prior to the time of such issuance or the
close of business on such record date plus the number of shares of Common Stock
issuable in payment of such dividend or distribution.

                  (d) ADJUSTMENTS FOR OTHER DIVIDENDS AND DISTRIBUTIONS. In the
event the Company at any time after the Commitment Date makes, or fixes a record
date for the determination of holders of Common Stock entitled to receive a
dividend or other distribution payable in securities (including options or
warrants for Common Stock) of the Company other than shares of Common Stock,
then and in each such event provision shall be made by the Company so that the
Holder of this Warrant shall receive upon exercise thereof, in addition to the
number of shares of Common Stock receivable thereupon, the amount of securities
of the Company which the Holder would have received had this Warrant been
exercised to purchase Common Stock immediately before the time of such issuance
or the close of business on such record date and had the Holder thereafter,
during the period from the date of such event to and including the exercise
date, retained such securities receivable by the Holder as aforesaid during such
period, subject to all other adjustments called for during such period under
this Section 5 with respect to the rights of the Holder, and subject to further
adjustment as provided herein.




                                       4

<PAGE>   5

                  (e) ADJUSTMENTS FOR THE RECLASSIFICATION, EXCHANGE AND
SUBSTITUTION. In the event that at any time or from time to time after the
Commitment Date, the Common Stock issuable upon the exercise of this Warrant is
changed into the same or a different number of shares of any class or classes of
stock, whether by recapitalization, reclassification or otherwise (other than a
subdivision or combination of shares or stock dividend or a reorganization,
merger, consolidation or sale of assets, provided for elsewhere in this Section
5), then and in any such event the Holder of this Warrant shall have the right
thereafter to exercise this Warrant and receive the kind and amount of stock and
other securities and property receivable, upon such recapitalization,
reclassification or other change, which the Holder would have received had this
Warrant been exercised to purchase Common Stock immediately before the time of
such recapitalization, reclassification or change, and had the Holder
thereafter, during the period from the date of such event to and including the
exercise date, retained such securities receivable by the Holder as aforesaid
during such period, subject to all other adjustments called for during such
period under this Section 5 with respect to the rights of the Holder, and
subject to further adjustment as provided herein. In any such case, appropriate
adjustment shall be made in the application of the provisions of this Section 5
with respect to the rights of the Holder hereof after the reorganization,
merger, consolidation or sale to the end that the provision of this Section 5
(including adjustment of the Exercise Calculation Price then in effect and the
number of shares purchasable upon exercise hereof) shall be applicable after
that event and be as nearly equivalent as may be practicable.

                  (f) REORGANIZATIONS, MERGERS, CONSOLIDATIONS OR SALES OF
ASSETS. If at any time or from time to time after the Commitment Date there is a
capital reorganization of the Common Stock (other than a recapitalization,
subdivision, combination, reclassification or exchange of shares provided for
elsewhere in this Section 5) or a merger or consolidation of the Company with or
into another entity, or the sale of all or substantially all of the Company's
properties and assets to any other person or entity, then as part of such
reorganization, merger, consolidation or sale, provision shall be made so that
the Holder of this Warrant shall thereafter be entitled to receive upon exercise
of the Warrant the number of shares of stock or other securities or property
which the Holder would have received had this Warrant been exercised to purchase
Common Stock immediately before the time of such capital reorganization, merger,
consolidation or sale, and had the Holder thereafter, during the period from the
date of such event to and including the exercise date, retained such securities
receivable by the Holder as aforesaid during such period, subject to all other
adjustments called for during such period under this Section 5 with respect to
the rights of the Holder, and subject to further adjustment as provided herein.
In any such case, appropriate adjustment shall be made in the application of the
provisions of this Section 5 with respect to the rights of the Holder hereof
after the reorganization, merger, consolidation or sale to the end that the
provision of this Section 5 (including adjustment of the Exercise Calculation
Price then in effect and the number of shares purchasable upon exercise hereof)
shall be applicable after that event and be as nearly equivalent as may be
practicable.

                  (g) OTHER ADJUSTMENTS OF EXERCISE PRICE AND NUMBER OF WARRANT
SHARES.

                      (i) In case the Company shall, at any time after the date
hereof and in connection with an equity investment in or a loan to the Company
and/or LDI Acquisition Sub Inc., (a "SUBSEQUENT FINANCING") issue or sell any
shares of Common Stock and/or any options,


                                       5



<PAGE>   6

rights or warrants to subscribe for shares of Common Stock ("NEW SHARES"), then
the number of shares of Common Stock issuable upon exercise of this Warrant
shall be increased in accordance with, and subject to, the following provisions:


                  (A) The number of additional shares of Common Stock issuable
upon exercise of this Warrant shall be determined in accordance with the
following formula:

X=               (WS)(NS)
                 --------
                 OS

X =              The number of additional shares of Common Stock issuable upon
                 exercise of this Warrant

WS =             The number of shares of Common Stock issuable upon exercise of
                 this Warrant immediately prior to the issuance or sale of New
                 Shares.

NS =             The number of shares of Common Stock issued or sold giving
                 rise to the adjustment pursuant to this Section 5(g), and/or
                 the maximum number of shares of Common Stock issuable upon
                 exercise, conversion or exchange of the Rights issued or sold
                 giving rise to the adjustment pursuant to this Section 5(g)

OS               87,805,999

                  (B) Upon the expiration of any rights, options, warrants or
convertible or exchangeable securities for which an adjustment was made
hereunder, if any thereof shall not have been exercised, the number of shares of
Common Stock purchasable upon the exercise of each Warrant shall, upon such
expiration, be readjusted and shall thereafter be such as it would have been had
it been originally adjusted (or had the original adjustment not been required,
as the case may be) as if (i) the only rights, options, warrants or convertible
or exchangeable securities so issued were the rights, options, warrants or
convertible or exchangeable securities, if any, actually exercised, converted or
exchanged and (ii) such rights, options, warrants or convertible or exchangeable
securities, if any, were exercised, converted or exchanged for the consideration
actually received by the Company upon such exercise, conversion or exchange plus
the aggregate consideration, if any, actually received by the Company for the
issuance, sale or grant of all such rights, options, warrants or convertible or
exchangeable securities whether or not exercised, converted or exchanged.

                  (C) Except as set forth below, "NEW SHARES" shall mean any
shares of Common Stock or Rights issued or sold or proposed to be issued or sold
by the Company on or after the initial issue date (the "Initial Issue Date") of
the initial Class A Warrants and Class B Warrants under the Term Loan Agreement.
"NEW SHARES" does not include (i) the Class A Warrants and the Class B Warrants
issued and sold by the Company or any shares of Common Stock issued upon
exercise of any thereof, (ii) shares of Common Stock or Rights issued in
consideration of the acquisition of all or any portion of a business as a going
concern, whether such acquisition shall be effected by a purchase of assets,
exchange of securities, merger, consolidation, reorganization or otherwise,
(iii) shares of Common Stock or



                                       6
<PAGE>   7

Rights offered or proposed to be offered to the public pursuant to a
registration statement filed under the Securities Act of 1933, as amended, or to
any underwriter of any such offering, (iv) shares of Common Stock or Rights
issued in connection with any stock split or stock dividend by the Company, (v)
shares of Common Stock or Rights which the Company and the holders of at least
50% of the issued and outstanding shares issuable upon exercise of the Class A
Warrants agree in writing at any time and from time to time should not be
subject to the provisions of this Section 5(g); (vi) stock options granted to
the Company's directors, officers, employees, consultants and independent
contractors pursuant to bona fide stock option or employee benefit plans of the
Company approved by a majority of either the Board of Directors of the Company
or committee of the Board of Directors of the Company delegated to perform such
function, or shares of Common Stock issued upon exercise thereof, (vii) shares
of Common Stock issued upon exercise of Rights outstanding on the Initial Issue
Date, or (viii) shares of Common Stock issued upon exercise, exchange or
conversion of any Rights referred to in any preceding clause of this sentence.
No adjustment in the number of shares of Common Stock issuable or issued upon
exercise, exchange or conversion of any of the Rights referred to in the
immediately preceding sentence by reason of original provisions thereof which
provide for an automatic adjustment upon the occurrence of specified events
shall be deemed to be an issuance or proposed issuance of New Shares. For the
purposes of the definition of "New Shares", the term "Rights" shall mean any
options, warrants, convertible or exchangeable securities or other rights,
however denominated, to subscribe for, purchase or otherwise acquire Common
Stock or other Rights to subscribe for purchase or otherwise acquire Common
Stock, with or without payment of additional consideration in cash or property,
either immediately or upon the occurrence of a specified date or a specified
event or the satisfaction or happening of any other condition or contingency.


                      (ii) The adjustments provided for in this Section 5(g)
shall be made for all Subsequent Financings to the extent the aggregate gross
proceeds thereof do not exceed the difference of $40,000,000 less the aggregate
amount of Term Loans made by the Holder on the date of original issuance and by
all other holders of Class A Warrants and Class B Warrants on or prior to such
date.

                  (h) ACCOUNTANTS' CERTIFICATE OF ADJUSTMENT. In each case of an
adjustment or readjustment of the Exercise Calculation Price or the number of
shares of Common Stock or other securities issuable upon exercise of this
Warrant, the Company, at its expense, reasonably promptly after such adjustment
or readjustment, shall cause independent public accountants of recognized
standing selected by the Company (who may be the independent public accountants
then auditing the books of the Company) to compute such adjustment or
readjustment in accordance with the provisions hereof and to prepare a statement
showing such adjustment or readjustment, and shall mail such statement, by first
class mail, postage prepaid, to the Holder of this Warrant at the Holder's
address as shown in the Company's books and records. The statement shall set
forth such adjustment or readjustment, showing in detail the facts upon which
such adjustment or readjustment is based.

                  Section 6. RESERVATION AND ISSUANCE OF COMMON STOCK

                  The Company shall at all times have authorized, and reserve
and keep available, free from preemptive rights, for the purpose of enabling it
to satisfy any obligation to issue fully



                                       7
<PAGE>   8

paid and non-assessable shares of Common Stock upon the exercise of this
Warrant, the number of shares of Common Stock deliverable upon exercise of this
Warrant, and the shares of Common Stock issued upon exercise of this Warrant and
full payment therefor in accordance with the provisions hereof shall be validly
issued, fully paid, non-assessable and free of preemptive rights.

                  Section 7. DELIVERY OF STOCK CERTIFICATES ON EXERCISE. As soon
as practicable after the exercise of this Warrant in full or in part, and in any
event within ten days thereafter, the Company at its expense (including the
payment by it of any applicable issue taxes) will cause to be issued in the name
of and delivered to the holder hereof, or as such holder (upon payment by such
holder of any applicable transfer taxes) may direct, a certificate or
certificates for the number of fully paid and nonassessable shares of Common
Stock (or Other Securities) to which such holder shall be entitled on such
exercise, plus, in lieu of any fractional share to which such holder would
otherwise be entitled, cash equal to such fraction multiplied by the then
current market value of one full share, together with any other stock or other
securities and property (including cash, where applicable) to which such holder
is entitled upon such exercise pursuant to Section 1 or otherwise under the
terms of this Warrant.

                  Section 8. NO IMPAIRMENT. The Company will not, by amendment
of its Certificate of Incorporation or through any reorganization, acquisition,
business combination, transfer of assets, consolidation, merger, dissolution,
issue or sale of securities or any other voluntary action, avoid or seek to
avoid the observance or performance of any of the terms of this Warrant, but
will at all times in good faith assist in the carrying out of all such terms and
in the taking of all such action as may be necessary or appropriate in order to
protect the rights of the holder of this Warrant. Without limiting the
generality of the foregoing, the Company:

                  (a) will not increase the par value of any shares of stock
receivable on the exercise of this Warrant above the amount payable therefor on
such exercise; and

                  (b) will take all such action as may be necessary or
appropriate in order that the Company may validly and legally issue fully paid
and nonassessable shares of Common Stock on the exercise of this Warrant from
time to time outstanding.

                  Section 9. OTHER NOTICES. In case at any time:

                  (a) The Company shall declare any cash dividend on its Common
Stock;

                  (b) The Company shall pay any dividend payable in capital
stock upon its Common Stock or make any distribution (other than regular cash
dividends) to the holders of its Common Stock;

                  (c) The Company shall authorize the distribution to all
holders of its Common Stock of evidences of its indebtedness or assets (other
than cash dividends or cash distributions payable out of earnings or earned
surplus or dividends payable in Common Stock);

                  (d) There shall be any capital reorganization, or
reclassification of the capital stock of the Company, or consolidation or merger
of the Company with another entity (other than a subsidiary of the Company in
which the Company is the surviving or continuing



                                       8
<PAGE>   9

corporation and no change occurs in the Company's Common Stock), or sale of all
or substantially all of its assets to, another person or entity;

                  (e) There shall be a voluntary or involuntary dissolution,
liquidation, bankruptcy, assignment for the benefit of creditors, or winding up
of the Company; or

                  (f) The Company proposes to take any other action or an event
occurs which would require an adjustment pursuant to Section 5;

then, in any one or more of said cases, the Company shall give written notice,
addressed to the Holder at the address of such Holder as shown on the books of
the Company within three business days thereafter.

                  Section 10. GOVERNING LAW AND JURISDICTION. This Warrant shall
be governed by and interpreted under the law of the State of New York applicable
to contracts negotiated, entered into and to be performed solely in that State,
without regard to the choice or conflicts of law principles of such State.

                  Section 11. SEVERABILITY. If any part of this Warrant is held
to be unenforceable or invalid under, or in conflict with, the applicable law of
any jurisdiction, then the unenforceable, invalid or conflicting part shall be
narrowed or replaced, to the extent possible, with a construction in such
jurisdiction that effectuates the intent of the parties regarding this Warrant
and the unenforceable, invalid or conflicting part. Notwithstanding the
unenforceability, invalidity or conflict with applicable law of any part of this
Warrant, the remaining parts shall be valid, enforceable and binding on the
parties.

                  Section 12. BINDING EFFECT. This Warrant shall be binding
upon, enforceable by and shall inure to the benefit of the parties hereto and
their respective permitted successors or assignees. Any Holder and its permitted
successors and assignees shall be deemed to be a Holder as defined and provided
for in this Warrant.

                  Section 13. REGISTER; ASSIGNMENT. The Holder may assign or
transfer all or any portion of this Warrant in compliance with the terms hereof.
Any Warrants issued upon the transfer or exercise in part of this Warrant shall
be numbered and shall be registered in a Warrant Register as they are issued.
The Company shall be entitled to treat the registered holder of any Warrant on
the Warrant Register as the owner in fact thereof for all purposes and shall not
be bound to recognize any equitable or other claim to or interest in such
Warrant on the part of any other person, and shall not be liable by reason of
any registration or transfer of Warrants which are registered or to be
registered in the name of a fiduciary or the nominee of a fiduciary unless made
with the actual knowledge that a fiduciary or nominee is committing a breach of
trust in requesting such registration or transfer, or with the knowledge of such
facts that its participation therein amounts to bad faith. This Warrant shall be
transferable only on the books of the Company upon delivery thereof duly
endorsed by the Holder or by its duly authorized attorney or representative, or
accompanied by proper evidence of succession, assignment, or authority to
transfer. In all cases of transfer by an attorney, executor, administrator,
guardian, or other legal representative, duly authenticated evidence of his or
its authority shall be produced. Upon any registration of transfer, the Company
shall deliver a new Warrant or Warrants to the person


                                       9
<PAGE>   10

entitled thereto. This Warrant may be exchanged, at the option of the Holder
thereof, for another Warrant, or other Warrants of different denominations, of
like tenor and representing in the aggregate the right to purchase a like number
of Warrants (or portions thereof), upon surrender to the Company or its duly
authorized agent. Notwithstanding the foregoing, the Company shall have no
obligation to cause Warrants to be transferred on its books to any person unless
it receives an opinion from counsel reasonably satisfactory to it that such
transfer complies with the provisions of the Act, and the rules and regulations
thereunder.

                  Section 14. AMENDMENT; WAIVER. This Warrant may be amended
only by a writing signed by the parties hereto. Neither any failure nor any
delay on the part of any party to this Warrant in exercising any right, power or
privilege hereunder shall operate as a waiver of any rights of any such party,
unless such waiver is made by a writing executed by such party and delivered to
the other party, nor shall a single or partial exercise of any right preclude
any other or further exercise of any other right, power or privilege accorded to
any party to this Warrant.

                  Section 15. NOTICES.

                  (a) All notices permitted or required hereunder shall be in
writing and shall be delivered by hand, by leading nationwide overnight courier
or by deposit in the United States mail, postage prepaid, by registered or
certified mail, return receipt requested, addressed to the Company or the
Holder, as the case may be, at the addresses set forth below:

                  If to the Company:

                  Long Distance International Inc.
                  4150 SW 28th Way
                  Ft. Lauderdale, Florida  33312
                  Facsimile: (954) 524-5110
                  Attention: Chief Financial Officer

                  with a copy to the General Counsel

                  with a copy to:

                  Loeb & Loeb LLP
                  345 Park Avenue
                  New York, New York  10154
                  Facsimile: (212) 407-4990
                  Attention: David S. Schaefer, Esq.













                                       10
<PAGE>   11



                  If to the Holder:

                  World Access, Inc.
                  Resurgens Plaza - Suite 2210
                  945 East Paces Ferry Road
                  Atlanta, Georgia 30326
                  Facsimile:  404-233-2280
                  Attention:  W. Tod Chmar

                  with a copy to:

                  Long Aldridge & Norman
                  303 Peachtree Street, Suite 5300
                  Atlanta, Georgia 30308
                  Facsimile:  404-527-4198
                  Attn:  Wayne N. Bradley, Esq.

                  (b) Notices given by mail shall be deemed effective on the
date shown on the proof of receipt of such mail. Other notices shall be deemed
given on the date of receipt. Any party hereto may change the address specified
above by written notice to the other parties hereto.

                  Section 16. [INTENTIONALLY OMITTED]

                  Section 17. ENTIRE AGREEMENT. This Warrant and the exhibit
attached hereto embody the entire agreement and understanding of the parties
hereto with respect to the subject matter hereof, and supersede all prior and
contemporaneous agreements and understandings, oral or written, relative to said
subject matter, and each party acknowledges that there are no other
representations or warranties regarding the subjects addressed in this Warrant
or such related instruments given to the other party other than as expressly set
forth herein and therein.

                  Section 18. HEADINGS. The headings contained herein are for
reference purposes only and shall not affect the meaning or interpretation of
this Warrant.

















                                       11


<PAGE>   12



                  IN WITNESS WHEREOF, the undersigned has executed this Warrant
as of October 19, 1999.

                                   LONG DISTANCE INTERNATIONAL INC.

                                   By: /s/ David R. Hess
                                      --------------------------------
                                      David R. Hess
                                      Chief Executive Officer








































                  SIGNATURE PAGE TO CLASS A BRIDGE LOAN WARRANT


<PAGE>   13



                                    EXHIBIT A

                                  EXERCISE FORM
                                  -------------

             For Exercise of Class A Bridge Loan Warrant to Purchase

                Common Stock of Long Distance International Inc.

                  The undersigned Warrant Holder (the "Holder") hereby elects to
exercise the right, represented by the Warrant Certificate dated __________ to
which this Exercise Form is annexed (the "Warrant"), to purchase ________ shares
of common stock of Long Distance International Inc. (the "Company"), par value
$0.001 per share ("Common Stock"), for a purchase price of $0.001 per share, and
tenders payment in full for such Common Stock with this form in the amount of
$_______ in accordance with the terms of the Warrant. The undersigned requests
that the Company issue and register a certificate representing such shares of
Common Stock in the name of the Holder and deliver such certificate to the
address set forth below.

                  If the portion of the Common Stock purchased on their exercise
of the Warrant is less than all of the Common Stock purchasable under the
Warrant, then the undersigned requests that a new Warrant certificate
representing the balance of the Common Stock as to which the Warrant is not
exercised be issued by the Company to the Holder and be delivered to the address
set forth below.

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

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

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

Date: ----------------------------------------

                                             WARRANT HOLDER

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

















                                       13