YAK COMMUNICATIONS INC. WARRANT

EXHIBIT 4.3

NEITHER THESE SECURITIES NOR THE SECURITIES ISSUABLE UPON EXERCISE OF THESE SECURITIES HAVE BEEN REGISTERED WITH THE SECURITIES AND EXCHANGE COMMISSION OR THE SECURITIES COMMISSION OF ANY STATE IN RELIANCE UPON AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), AND, ACCORDINGLY, MAY NOT BE OFFERED OR SOLD EXCEPT PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT OR PURSUANT TO AN AVAILABLE EXEMPTION FROM, OR IN A TRANSACTION NOT SUBJECT TO, THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT AND IN ACCORDANCE WITH APPLICABLE STATE SECURITIES LAWS AS EVIDENCED BY A LEGAL OPINION OF COUNSEL TO THE TRANSFEROR TO SUCH EFFECT, THE SUBSTANCE OF WHICH SHALL BE REASONABLY ACCEPTABLE TO THE COMPANY. THESE SECURITIES AND THE SECURITIES ISSUABLE UPON EXERCISE OF THESE SECURITIES MAY BE PLEDGED IN CONNECTION WITH A BONA FIDE MARGIN ACCOUNT SECURED BY SUCH SECURITIES.

YAK COMMUNICATIONS INC.

WARRANT

Date of Original Issuance: March     , 2004

Yak Communications Inc., a Florida corporation (the “Company”), hereby certifies that, for value received, [                    ] or its registered assigns (the “Holder”), is entitled to purchase from the Company up to a total of [            ]¹ shares of Common Stock (as defined below) (such shares, the “Warrant Shares”). This Warrant (“Warrant”) may be exercised from time to time from and after the date hereof and through and including March     , 2010 (the “Expiration Date”), and subject to the following terms and conditions:

1. Definitions. As used in this Warrant, the following terms shall have the respective definitions set forth in this Section. Capitalized terms that are used and not defined in this Warrant that are defined in the Purchase Agreement (as defined below) shall have the respective definitions set forth in the Purchase Agreement.

(a) “Business Day” means any day except Saturday, Sunday and any day that is a federal legal holiday in the United States or a day on which banking institutions in the State of New York are authorized or required by law or other government action to close.

(b) “Common Stock” means the common stock of the Company, no par value per share, and any securities into which such common stock may be hereafter reclassified.

(c) “Exercise Price” means $17.00, subject to adjustment in accordance with Section 9 hereof.

(d) “Purchase Agreement” means the Securities Purchase Agreement dated as of the date of this Warrant to which the Company and the original Holder are parties.

(e) “Trading Day” means (i) a day on which the Common Stock is traded on a Trading Market (other than the OTC Bulletin Board), or (ii) if the Common Stock is not listed on a Trading Market (other than the OTC Bulletin Board), a day on which the Common Stock is traded in the over-the-counter market, as reported by the OTC Bulletin Board, or (iii) if the Common Stock is not quoted on the OTC Bulletin Board, a day on which the Common Stock is quoted in the over-the-counter market as reported by the National Quotation Bureau Incorporated (or any similar organization or agency succeeding to its functions of reporting prices); provided, that in the event that the Common Stock is not listed or quoted as set forth in (i), (ii) and (iii) hereof, then Trading Day shall mean a Business Day.

2. Registration of Warrant. The Company shall register this Warrant upon records to be maintained by the Company for that purpose (the “Warrant Register”), in the name of the record Holder hereof from time to time. The Holder agrees that it may not transfer this Warrant as to more than the number of Warrant Shares then outstanding as shown on the most updated Warrant Exercise Log, and any purported transfer in excess of such number of Warrant Shares shall have no effect. The Company may deem and treat the registered Holder of this Warrant as the absolute owner hereof for the purpose of any exercise hereof or any distribution to the Holder, and for all other purposes, absent actual notice to the contrary.

3. Registration of Transfers. The Company shall register the transfer of any portion of this Warrant in the Warrant Register, upon surrender of this Warrant, with the Form of Assignment attached hereto duly completed and signed, to the Company at its address specified herein. Upon any such registration or transfer, a new Warrant to purchase Common Stock, in substantially the form of this Warrant (any such new Warrant, a “New Warrant”), evidencing the portion of this Warrant so transferred shall be issued to the transferee and a New Warrant evidencing the remaining portion of this Warrant not so transferred, if any, shall be issued to the transferring Holder. The acceptance of the New Warrant by the transferee thereof shall be deemed the acceptance by such transferee of all of the rights and obligations of a holder of a Warrant.

4. Exercise and Duration of Warrants. This Warrant shall be exercisable by the registered Holder at any time and from time to time on or after the date hereof to and including 6:30 p.m. New York City time on the Expiration Date. At 6:30 p.m., New York City time on the Expiration Date, the portion of this Warrant not exercised prior thereto shall be and become void and of no value. The Company may not call or redeem any portion of this Warrant without the consent of the Holder.

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5. Delivery of Warrant Shares.

(a) To acquire Warrant Shares under this Warrant, the Holder shall not be required to physically surrender this Warrant unless the aggregate number of Warrant Shares then represented by this Warrant is being exercised. Upon delivery of a written notice, in the form of the Exercise Notice attached hereto (the “Exercise Notice”) to the Company (together with the Warrant Exercise Log attached thereto (the “Warrant Exercise Log”) at its address for notice set forth herein and upon payment of the Exercise Price multiplied by the number of Warrant Shares that the Holder intends to purchase hereunder, the Company shall promptly (but in no event later than three Trading Days after the Date of Exercise) issue and deliver to the Holder, a certificate representing the number of Warrant Shares to which such exercise pertains (the dollar amount of the exercise at issue divided by the Exercise Price), which, unless otherwise required by the Purchase Agreement, shall be free of restrictive legends. The Company shall, upon request of the Holder and subsequent to the date on which a registration statement covering the resale of the Warrant Shares has been declared effective by the Securities and Exchange Commission, use its best efforts to deliver the Warrant Shares hereunder electronically through the Depository Trust Corporation or another established clearing corporation performing similar functions, if available, provided, that, the Company may, but will not be required to change its transfer agent if its current transfer agent cannot deliver Warrant Shares electronically through the Depository Trust Corporation. A “Date of Exercise” means the date on which the Holder shall have delivered to Company: (i) the Exercise Notice (with the Warrant Exercise Log attached to it), appropriately completed and duly signed and (ii) the Exercise Price for the number of Warrant Shares so indicated by the Holder to be purchased.

(b) If by the third Trading Day after a Date of Exercise the Company fails to deliver the required number of Warrant Shares in the manner required pursuant to Section 5(a), then the Holder will have the right to rescind such exercise.

(c) If by the third Trading Day after a Date of Exercise the Company fails to deliver the required number of Warrant Shares in the manner required pursuant to Section 5(a), and if after such third Trading Day and prior to the receipt of such Warrant Shares, the Holder purchases (in an open market transaction or otherwise) shares of Common Stock to deliver in satisfaction of a sale by the Holder of the Warrant Shares which the Holder anticipated receiving upon such exercise (a “Buy-In”), then the Company shall (1) pay in cash to the Holder the amount by which (x) the Holder’s total purchase price (including brokerage commissions, if any) for the shares of Common Stock so purchased exceeds (y) the amount obtained by multiplying (A) the number of Warrant Shares that the Company was required to deliver to the Holder in connection with the exercise at issue by (B) the closing bid price of the Common Stock at the time of the obligation giving rise to such purchase obligation and (2) reinstate the portion of the Warrant and equivalent number of Warrant Shares for which such exercise was not honored. The Holder shall provide the Company written notice indicating the amounts payable to the Holder in respect of the Buy-In.

(d) The Company’s obligations to issue and deliver Warrant Shares in accordance with the terms hereof are absolute and unconditional, irrespective of any action or inaction by the Holder to enforce the same, any waiver or consent with respect to any provision hereof, the recovery of any judgment against any Person or any action to enforce the same, or any setoff, counterclaim, recoupment, limitation or termination, or any breach or alleged breach by the Holder or any other Person of any obligation to the Company or any violation or alleged

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violation of law by the Holder or any other Person, and irrespective of any other circumstance which might otherwise limit such obligation of the Company to the Holder in connection with the issuance of Warrant Shares. Nothing herein shall limit a Holder’s right to pursue any other remedies available to it hereunder, at law or in equity including, without limitation, a decree of specific performance and/or injunctive relief with respect to the Company’s failure to timely deliver certificates representing Warrant Shares upon exercise of the Warrant as required pursuant to the terms hereof.

6. Charges, Taxes and Expenses. Issuance and delivery of Warrant Shares upon exercise of this Warrant shall be made without charge to the Holder for any issue or transfer tax, withholding tax, transfer agent fee or other incidental tax or expense in respect of the issuance of such certificates, all of which taxes and expenses shall be paid by the Company; provided, however, that the Company shall not be required to pay any tax which may be payable in respect of any transfer involved in the registration of any certificates for Warrant Shares in a name other than that of the Holder. The Holder shall be responsible for all other tax liability that may arise as a result of holding or transferring this Warrant or receiving Warrant Shares upon exercise hereof.

7. Replacement of Warrant. If this Warrant is mutilated, lost, stolen or destroyed, the Company shall issue or cause to be issued in exchange and substitution for and upon cancellation hereof, or in lieu of and substitution for this Warrant, a New Warrant, but only upon receipt of evidence reasonably satisfactory to the Company of such loss, theft or destruction and customary and reasonable indemnity (which shall not include a surety bond), if requested. Applicants for a New Warrant under such circumstances shall also comply with such other reasonable regulations and procedures and pay such other reasonable third-party costs as the Company may prescribe. If a New Warrant is requested as a result of a mutilation of this Warrant, then the Holder shall deliver such mutilated Warrant to the Company as a condition precedent to the Company’s obligation to issue the New Warrant.

8. Reservation of Shares. The Company covenants that it will at all times reserve and keep available out of the aggregate of its authorized but unissued and otherwise unreserved Common Stock, solely for the purpose of enabling it to issue Warrant Shares upon exercise of this Warrant as herein provided, the number of Warrant Shares which are then issuable and deliverable upon the exercise of this entire Warrant, free from preemptive rights or any other contingent purchase rights of persons other than the Holder (taking into account the adjustments and restrictions of Section 9). The Company covenants that all Warrant Shares so issuable and deliverable shall, upon issuance and the payment of the applicable Exercise Price in accordance with the terms hereof, be duly and validly authorized, issued and fully paid and nonassessable.

9. Certain Adjustments. The Exercise Price and number of Warrant Shares issuable upon exercise of this Warrant are subject to adjustment from time to time as set forth in this Section 9.

(a) Stock Dividends and Splits. If the Company, at any time while this Warrant is outstanding, (i) pays a stock dividend on its Common Stock or otherwise makes a distribution on any class of capital stock that is payable in shares of Common Stock, (ii) subdivides outstanding shares of Common Stock into a larger number of shares, or (iii) combines

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outstanding shares of Common Stock into a smaller number of shares, then in each such case the Exercise Price shall be multiplied by a fraction of which the numerator shall be the number of shares of Common Stock outstanding immediately before such event and of which the denominator shall be the number of shares of Common Stock outstanding immediately after such event. Any adjustment made pursuant to clause (i) of this paragraph shall become effective immediately after the record date for the determination of stockholders entitled to receive such dividend or distribution, and any adjustment pursuant to clause (ii) or (iii) of this paragraph shall become effective immediately after the effective date of such subdivision or combination. If any event requiring an adjustment under this paragraph occurs during the period that an Exercise Price is calculated hereunder, then the calculation of such Exercise Price shall be adjusted appropriately to reflect such event.

(b) Fundamental Transactions. If, at any time while this Warrant is outstanding, (1) the Company effects any merger or consolidation of the Company with or into another Person, (2) the Company effects any sale of all or substantially all of its assets in one or a series of related transactions, (3) any tender offer or exchange offer (whether by the Company or another Person) is completed pursuant to which holders of Common Stock are permitted to tender or exchange their shares for other securities, cash or property, or (4) the Company effects any reclassification of the Common Stock or any compulsory share exchange pursuant to which the Common Stock is effectively converted into or exchanged for other securities, cash or property (in any such case, a “Fundamental Transaction”), then the Holder shall have the right to either (A) to purchase and receive upon the basis and upon the terms and conditions herein specified and in lieu of the Warrant Shares immediately theretofore issuable upon exercise of the Warrant, such shares of stock, securities or assets (including cash) as would have been issuable or payable with respect to or in exchange for a number of Warrant Shares equal to the number of Warrant Shares immediately theretofore issuable upon exercise of the Warrant, had such Fundamental Transaction not taken place, and in any such case appropriate provision shall be made with respect to the rights and interests of each Holder to the end that the provisions hereof shall thereafter be applicable, as nearly equivalent as may be practicable in relation to any shares of stock, securities or assets (including cash) thereafter deliverable upon the exercise thereof or (B) require the repurchase of this Warrant for a purchase price, payable in cash within five Trading Days after such request, equal to the Black Scholes value of the remaining unexercised portion of this Warrant on the date of such request. The terms of any agreement pursuant to which a Fundamental Transaction is effected shall include terms requiring any such successor or surviving entity to comply with the provisions of this Section.

(c) Subsequent Equity Sales.

(i) (X) If the Company or any subsidiary thereof, as applicable with respect to Common Stock Equivalents (as defined below), at any time during the first 15 months that this Warrant is outstanding, shall issue any securities of the Company or any Subsidiary which entitle the holder thereof to acquire Common Stock at any time, including without limitation, any debt, preferred stock, rights, options, warrants or any other instrument that is at any time convertible into or exchangeable for, or otherwise entitles the holder thereof to receive, Common Stock or other securities that entitle the holder to receive, directly or indirectly, Common Stock (“Common Stock Equivalents”) entitling any Person to acquire shares of Common Stock, at a price per share less than the Exercise Price (if the holder of the Common

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Stock or Common Stock Equivalent so issued shall at any time, whether by operation of purchase price adjustments, reset provisions, floating conversion, exercise or exchange prices or otherwise, or due to warrants, options or rights issued in connection with such issuance, be entitled to receive shares of Common Stock at a price less than the Exercise Price, such issuance shall be deemed to have occurred for less than the Exercise Price), then, at the option of the Holder for such exercises as it shall indicate, the Exercise Price shall be adjusted to mirror the conversion, exchange or purchase price for such Common Stock or Common Stock Equivalents (including any reset provisions thereof) at issue. Such adjustment shall be made whenever such Common Stock or Common Stock Equivalents are issued. The Company shall notify the Holder in writing, no later than the Trading Day following the issuance of any Common Stock or Common Stock Equivalent subject to this section, indicating therein the applicable issuance price, or of applicable reset price, exchange price, conversion price and other pricing terms.

(Y) If the Company or any subsidiary thereof, as applicable with respect to Common Stock Equivalents, at any time after the expiration of the 15-month period described in subparagraph (X), above, shall issue any securities of the type described in such subparagraph, at a price per share less than the Exercise Price, then the Exercise Price shall be multiplied by a fraction, the numerator of which shall be the number of shares of Common Stock outstanding immediately prior to the issuance of such Common Stock or Common Stock Equivalents plus the number of shares of Common Stock which the aggregate offering price for such shares of Common Stock or Common Stock Equivalents would purchase at the Exercise Price then in effect, and the denominator of which shall be the sum of the number of shares of Common Stock outstanding immediately prior to such issuance plus the number of shares of Common Stock so issued or issuable, provided, that for purposes hereof, all shares of Common Stock that are issuable upon conversion, exercise or exchange of Common Stock Equivalents shall be deemed outstanding immediately after the issuance of such Common Stock Equivalents.

Notwithstanding the foregoing, in neither event will any adjustment be made under this Section 9(c) in respect of:

(A) Any grant of an option or warrant for Common Stock or issuance of any shares of Common Stock upon the exercise of any options or warrants to employees, officers and directors of or consultants to the Company pursuant to any stock option plan, employee stock purchase plan or similar plan or incentive or consulting arrangement approved by the Company’s board of directors; and

(B) Any restricted stock awards approved by the Company’s Board of Directors;

(C) Any Common Stock or Common Stock Equivalents issued in connection with equipment leases or real property leases, provided that not more than $250,000 of securities is so issuable and such leases are otherwise on customary terms;

(D) Any Common Stock issued as a dividend or distribution on the Company’s Common Stock or in a transaction described in Section 9(a);

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(E) Any Common Stock or Common Stock Equivalents issued as part of the purchase price of the acquisition of another corporation or entity by the Company by consolidation, merger, purchase of all or substantially all of the assets, or other reorganization in which the Company acquires, in a single transaction or a series of related transactions, all or substantially all of the assets of such other corporation or entity; provided, that such transaction is not primarily a financing transaction; or

(F) Any rights or agreements to purchase Common Stock Equivalents outstanding on the date hereof and as specified in Schedule 3.1(g) to the Purchase Agreement (but not as to any amendments or other modifications to the number of Common Stock issuable thereunder, the terms set forth therein, or the exercise price set forth therein).

(ii) If, at any time while this Warrant is outstanding, the Company or any Subsidiary issues Common Stock Equivalents at a price per share that floats or resets or otherwise varies or is subject to adjustment based on market prices of the Common Stock (a “Floating Price Security”), then for purposes of applying the preceding paragraph in connection with any subsequent exercise, the Exercise Price will be determined separately on each Exercise Date and will be deemed to equal the lowest price per share at which any holder of such Floating Price Security is entitled to acquire shares of Common Stock on such Exercise Date (regardless of whether any such holder actually acquires any shares on such date).

(d) Number of Warrant Shares. Simultaneously with any adjustment to the Exercise Price pursuant to paragraph (a) or (b) of this Section, the number of Warrant Shares that may be purchased upon exercise of this Warrant shall be increased or decreased proportionately, so that after such adjustment the aggregate Exercise Price payable hereunder for the adjusted number of Warrant Shares shall be the same as the aggregate Exercise Price in effect immediately prior to such adjustment.

(e) Calculations. All calculations under this Section 9 shall be made to the nearest cent or the nearest 1/100^th of a share, as applicable. The number of shares of Common Stock outstanding at any given time shall not include shares owned or held by or for the account of the Company, and the disposition of any such shares shall be considered an issue or sale of Common Stock.

(f) Notice of Adjustments. Upon the occurrence of each adjustment pursuant to this Section 9, the Company at its expense will promptly compute such adjustment in accordance with the terms of this Warrant and prepare a certificate setting forth such adjustment, including a statement of the adjusted Exercise Price and adjusted number or type of Warrant Shares or other securities issuable upon exercise of this Warrant (as applicable), describing the transactions giving rise to such adjustments and showing in detail the facts upon which such adjustment is based. Upon written request, the Company will promptly deliver a copy of each such certificate to the Holder and to the Company’s Transfer Agent.

(g) Notice of Corporate Events. If the Company (i) declares a dividend or any other distribution of cash, securities or other property in respect of its Common Stock, including without limitation any granting of rights or Warrants to subscribe for or purchase any capital stock of the Company or any Subsidiary, (ii) authorizes or approves, enters into any agreement

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contemplating or solicits stockholder approval for any Fundamental Transaction or (iii) authorizes the voluntary dissolution, liquidation or winding up of the affairs of the Company (but only to the extent such disclosure would not result in the dissemination of material, non-public information to the Holder), then the Company shall deliver to the Holder a notice describing the material terms and conditions of such transaction, at least 10 calendar days prior to the applicable record or effective date on which a Person would need to hold Common Stock in order to participate in or vote with respect to such transaction, and the Company will take all steps reasonably necessary in order to insure that the Holder is given the practical opportunity to exercise this Warrant prior to such time so as to participate in or vote with respect to such transaction; provided, however, that the failure to deliver such notice or any defect therein shall not affect the validity of the corporate action required to be described in such notice.

10. Payment of Exercise Price. The Holder may pay the Exercise Price in one of the following manners:

(a) Cash Exercise. The Holder may deliver immediately available funds; or

(b) Cashless Exercise. If an Exercise Notice is delivered after the Effectiveness Date (as defined in the Registration Rights Agreement among the original Holder and the Company in connection with this Warrant) and a registration statement permitting the Holder to resell the Warrant Shares is not then effective or the prospectus forming a part thereof is not then available to the Holder for the resale of the Warrant Shares, then and only then, the Holder may notify the Company in an Exercise Notice of its election to utilize cashless exercise, in which event the Company shall issue to the Holder the number of Warrant Shares determined as follows:

X = Y [(A-B)/A]

where:

X = the number of Warrant Shares to be issued to the Holder.

Y = the number of Warrant Shares with respect to which this Warrant is being exercised.

A = the average of the closing prices for the five Trading Days immediately prior to (but not including) the Exercise Date.

B = the Exercise Price.

For purposes of Rule 144 promulgated under the Securities Act, it is intended, understood and acknowledged that the Warrant Shares issued in a cashless exercise transaction shall be deemed to have been acquired by the Holder, and the holding period for the Warrant Shares shall be deemed to have commenced, on the date this Warrant was originally issued.

11. Company Right to Purchase. Effective after the three year anniversary of the Effective Date, the Holder hereby grants to the Company the right to purchase this Warrant (in whole only and not in part) for cash (the “Call Option”) at a purchase price equal to $0.001 per

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share of Common Stock for which this Warrant is then exercisable (the “Call Price”); provided, however, that the Call Option shall only be exercisable (i) if the VWAP of the Common Stock for twenty (20) consecutive Trading Days equals or exceeds 160% per share in excess of the then-current Exercise Price (by way of example, if the then-current Exercise Price is $1.00, then the VWAP shall need to equal or exceed $2.60 for such 20-Trading Days period) and (ii) if a registration statement under the Securities Act is effective on the Call Date (as hereinafter defined) that registers the resale of the Warrant Shares. As used herein, “Call Date” means the Business Day fixed by the Company upon which this Warrant shall be called in accordance with this Section 11. As used herein, “VWAP” means, as determined by the first of the following clauses that applies: (i) if the Common Stock is listed on a Trading Market during a Trading Day, the daily volume weighted average price of the Common Stock for such Trading Day (or, if there be no such price on such Trading Day, the nearest preceding Trading Day) on the Trading Market on which the Common Stock is then listed, as reported by Bloomberg Financial L.P. using the VAP function; (ii) if the Common Stock is not then listed on a Trading Market, but is eligible for priced quotations on the OTC Bulletin Board (or, if there be no such priced quotation on such Trading Day, the nearest preceding Trading Day), as reported by Bloomberg Financial L.P. using the VAP function; (iii) if the Common Stock is not then eligible for priced quotations on the OTC Bulletin Board, but its prices are then reported in the “Pink Sheets” published by the Pink Sheets LLC (or a similar organization or agency succeeding to its functions of reporting prices), the most recent bid price per share of the Common Stock so reported; or (iv) in all other cases, the fair market value of a share of Common Stock as determined by a nationally recognized-independent appraiser selected in good faith by the Investors holding a majority of the then-outstanding Shares.

12. Notice to Holder. If the Company elects to exercise its Call Option pursuant to this Section 12, then at least fifteen (15) Business Days but not more than sixty (60) Business Days before the Call Date, the Company shall mail or cause to be mailed a redemption notice (the “Redemption Notice”) to Holder. The Redemption Notice shall state: (i) the Call Date; (ii) the Call Price; (iii) the Exercise Price; (iv) that this Warrant must be presented and surrendered to the warrant agent (as set forth in Section 17 hereof) to collect the Call Price; (v) that this Warrant may be exercised at any time before the close of business on the fifth (5^th) Business Day immediately preceding the Call Date (the “Exercise Termination Date”); (vi) that, if the Holder wishes to exercise this Warrant, the Holder must satisfy the requirements of Section 5 and Section 14 hereof prior to the Exercise Termination Date; and (vii) that, unless the Company defaults in making the payment of the Call Price, the only remaining right of Holder after the Exercise Termination Date shall be to receive payment of the Call Price upon presentation and surrender of this Warrant to the warrant agent.

13. Payment upon Surrender of Warrant. If the Company elects to exercise its Call Option pursuant to this Section 13, and the Holder does not exercise this Warrant prior to the Exercise Termination Date, then the Company shall pay the Call Price to the Holder in accordance with the Redemption Notice upon presentation and surrender by the Holder of this Warrant to the warrant agent.

14. Limitation on Exercise. Notwithstanding anything to the contrary contained herein, the number of Warrant Shares that may be acquired by the Holder upon any exercise of this Warrant (or otherwise in respect hereof) shall be limited to the extent necessary to insure

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that, following such exercise (or other issuance), the total number of shares of Common Stock then beneficially owned by such Holder and its Affiliates and any other Persons whose beneficial ownership of Common Stock would be aggregated with the Holder’s for purposes of Section 13(d) of the Exchange Act, does not exceed 9.999% of the total number of issued and outstanding shares of Common Stock (including for such purpose the shares of Common Stock issuable upon such exercise). For such purposes, beneficial ownership shall be determined in accordance with Section 13(d) of the Exchange Act and the rules and regulations promulgated thereunder. This provision shall not restrict the number of shares of Common Stock which a Holder may receive or beneficially own in order to determine the amount of securities or other consideration that such Holder may receive in the event of a Fundamental Transaction as contemplated in Section 9 of this Warrant. This restriction may not be waived.

15. No Fractional Shares. No fractional shares of Warrant Shares will be issued in connection with any exercise of this Warrant and in lieu thereof, any fractional shares shall be rounded down to the nearest whole.

16. Notices. Any and all notices or other communications or deliveries hereunder (including, without limitation, any Exercise Notice) shall be in writing and shall be deemed given and effective on the earliest of (i) the date of transmission, if such notice or communication is delivered via facsimile at the facsimile number specified in this Section prior to 6:30 p.m. (New York City time) on a Trading Day, (ii) the next Trading Day after the date of transmission, if such notice or communication is delivered via facsimile at the facsimile number specified in this Section on a day that is not a Trading Day or later than 6:30 p.m. (New York City time) on any Trading Day, (iii) the Trading Day following the date of mailing, if sent by nationally recognized overnight courier service, or (iv) upon actual receipt by the party to whom such notice is required to be given. The addresses for such communications shall be: (i) if to the Company, to Yak Communications Inc., 55 Town Centre Court, Suite 610, Toronto, Ontario, Canada M1P 4X4, Facsimile No.: (416) 279-1372, Attn: Chief Financial Officer, or (ii) if to the Holder, to the address or facsimile number appearing on the Warrant Register or such other address or facsimile number as the Holder may provide to the Company in accordance with this Section.

17. Warrant Agent. The Company shall serve as Warrant agent under this Warrant. Upon 30 days’ notice to the Holder, the Company may appoint a new Warrant agent. Any corporation into which the Company or any new Warrant agent may be merged or any corporation resulting from any consolidation to which the Company or any new Warrant agent shall be a party or any corporation to which the Company or any new Warrant agent transfers substantially all of its corporate trust or shareholders services business shall be a successor Warrant agent under this Warrant without any further act. Any such successor Warrant agent shall promptly cause notice of its succession as Warrant agent to be mailed (by first class mail, postage prepaid) to the Holder at the Holder’s last address as shown on the Warrant Register.

18. Miscellaneous.

(a) This Warrant shall be binding on and inure to the benefit of the parties hereto and their respective successors and assigns. Subject to the preceding sentence, nothing in this Warrant shall be construed to give to any Person other than the Company and the Holder any

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legal or equitable right, remedy or cause of action under this Warrant. This Warrant may be amended only in writing signed by the Company and the Holder and their successors and assigns.

(b) All questions concerning the construction, validity, enforcement and interpretation of this Warrant shall be governed by and construed and enforced in accordance with the internal laws of the State of New York, without regard to the principles of conflicts of law thereof. Each party agrees that all legal proceedings concerning the interpretations, enforcement and defense of this Warrant and the transactions herein contemplated (“Proceedings”) (whether brought against a party hereto or its respective Affiliates, employees or agents) shall be commenced exclusively in the state and federal courts sitting in the City of New York, Borough of Manhattan (the “New York Courts”). Each party hereto hereby irrevocably submits to the exclusive jurisdiction of the New York Courts for the adjudication of any dispute hereunder or in connection herewith or with any transaction contemplated hereby or discussed herein, and hereby irrevocably waives, and agrees not to assert in any Proceeding, any claim that it is not personally subject to the jurisdiction of any New York Court, or that such Proceeding has been commenced in an improper or inconvenient forum. Each party hereto hereby irrevocably waives personal service of process and consents to process being served in any such Proceeding by mailing a copy thereof via registered or certified mail or overnight delivery (with evidence of delivery) to such party at the address in effect for notices to it under this Warrant and agrees that such service shall constitute good and sufficient service of process and notice thereof. Nothing contained herein shall be deemed to limit in any way any right to serve process in any manner permitted by law. Each party hereto hereby irrevocably waives, to the fullest extent permitted by applicable law, any and all right to trial by jury in any legal proceeding arising out of or relating to this Warrant or the transactions contemplated hereby. If either party shall commence a Proceeding to enforce any provisions of this Warrant, then the prevailing party in such Proceeding shall be reimbursed by the other party for its attorney’s fees and other costs and expenses incurred with the investigation, preparation and prosecution of such Proceeding.

(c) The headings herein are for convenience only, do not constitute a part of this Warrant and shall not be deemed to limit or affect any of the provisions hereof.

(d) In case any one or more of the provisions of this Warrant shall be invalid or unenforceable in any respect, the validity and enforceability of the remaining terms and provisions of this Warrant shall not in any way be affected or impaired thereby and the parties will attempt in good faith to agree upon a valid and enforceable provision which shall be a commercially reasonable substitute therefor, and upon so agreeing, shall incorporate such substitute provision in this Warrant.

(e) Subject to the provisions of Section 9 hereof, prior to exercise of this Warrant, the holder hereof shall not, by reason of by being a holder hereof, be entitled to any rights of a stockholder with respect to the Warrant Shares, including (without limitation) the right to vote such Warrant Shares, receive dividends or other distributions thereon, exercise preemptive rights or be notified of stockholder meetings, and such holder shall not be entitled to any notice or other communication concerning the business or affairs of the Company.

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(f) This Warrant may be modified or amended or the provisions hereof waived with the written consent of the Company and the Holder.

[REMAINDER OF PAGE INTENTIONALLY LEFT BLANK,

SIGNATURE PAGE FOLLOWS]

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IN WITNESS WHEREOF, the Company has caused this Warrant to be duly executed by its authorized officer as of the date first indicated above.

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EXERCISE NOTICE

YAK COMMUNICATIONS INC.

WARRANT DATED MARCH [    ], 2004

The undersigned hereby irrevocably elects to purchase                      shares of Common Stock pursuant to the above referenced Warrant, and the Holder encloses herewith $             in cash, certified or official bank check or checks or other immediately available funds, which sum represents the aggregate Exercise Price for the number of Warrant Shares to which this Exercise Notice relates, together with any applicable taxes payable by the undersigned pursuant to the Warrant.

By its delivery of this Exercise Notice, the undersigned represents and Warrants to the Company that in giving effect to the exercise evidenced hereby the Holder will not beneficially own in excess of the number of shares of Common Stock (determined in accordance with Section 13(d) of the Securities Exchange Act of 1934) permitted to be owned under Section 14 of this Warrant to which this notice relates.

The undersigned requests that certificates for the Warrant Shares issuable upon this exercise be issued in the name of

PLEASE INSERT SOCIAL SECURITY OR

TAX IDENTIFICATION NUMBER

(Please print name and address)

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Warrant Exercise Log

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YAK COMMUNICATIONS INC.

WARRANT DATED MARCH [    ], 2004

FORM OF ASSIGNMENT

[To be completed and signed only upon transfer of Warrant]

FOR VALUE RECEIVED, the undersigned hereby sells, assigns and transfers unto                      the right represented by the within Warrant to purchase              shares of Common Stock to which the within Warrant relates and appoints              attorney to transfer said right on the books of the Company with full power of substitution in the premises.

Dated:                     ,     

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