Document:

<PAGE>

Exhibit 10.27: Non-Negotiable Promissory Note in favor of Ibex Investments Ltd.

                                  NONNEGOTIABLE
                                 PROMISSORY NOTE

$300,000                                                Issued:  April 25, 2001
Principal Amount                                   Maturity Date:  May 25, 2001

         FOR VALUE RECEIVED, VOICE MOBILITY INTERNATIONAL, INC., A NEVADA
         CORPORATION ("MAKER"), HEREBY PROMISES TO PAY TO IBEX INVESTMENTS LTD.
         (THE "PAYEE"), THE PRINCIPAL AMOUNT ("PRINCIPAL AMOUNT") OF THREE
         HUNDRED THOUSAND DOLLARS (CDN.$300,000), ACCORDING TO THE FOLLOWING
         TERMS AND CONDITIONS. EXCEPT AS MAY BE REQUIRED BY APPLICABLE LAW, NO
         INTEREST SHALL ACCRUE OR BE PAYABLE WITH RESPECT TO THE OUTSTANDING
         PRINCIPAL AMOUNT OF THIS NOTE. THIS INSTRUMENT IS NOT NEGOTIABLE OR
         ASSIGNABLE BY PAYEE EXCEPT TO A PERMITTED TRANSFEREE AS DEFINED BELOW.
         ALL REFERENCES TO CURRENCY HEREIN REFER TO CANADIAN DOLLARS UNLESS
         OTHERWISE NOTED.

         1. FEES AND PAYMENT SCHEDULE.

                  All unpaid portions of the Principal Amount and a fee of
$10,000 remaining on this Note shall be due and payable on the earlier of May
25, 2001 (the "Maturity Date") or the receipt of proceeds from Maker's next bona
fide third party equity financing.

         2. DEFAULT. For purposes of this Note, a "Default" shall be deemed to
have occurred upon any of the following events:

                  (a) A failure by Maker to pay any Principal or Fees owing
under this Note when due on the Maturity Date;

                  (b) Maker shall make an assignment for the benefit of
creditors, or if a receiver of Maker's property shall be appointed, or if a
petition in bankruptcy or for the reorganization under any Chapter of any
Federal or State Bankruptcy Act or other similar proceeding under law for relief
of debtors shall be filed by or against Maker, or if any lien of attachment,
execution, lien, or claim of lien be placed against all or any portion of the
assets of the Maker and is not cleared from the record or reasonably bonded
against within ninety (90) days after it has been filed; unless

                  (c) Any such failure or action by Maker under Sections 3(a)
and (b) shall not have been cured within fifteen (15) days of receipt of a
notice from Payee specifying the alleged Default or failure; and

                  (d) Provided, however, that no delay or omission on the part
of Payee in exercising any right hereunder shall operate as a waiver of such
right or of any right under this Note. A waiver on any one occasion shall not be
construed as a bar to or

                                      1
<PAGE>

waiver of any right or remedy on any future occasion. Except as set forth in
this Section 3, Maker hereby expressly waives any presentment, demand, protest,
notice of protest or other notice of any kind and hereby expressly waives and
covenants not to assert any appraisement, stay, extension, redemption or similar
laws, now or at any time hereafter enforce, which might delay, prevent or
otherwise impede the enforcement of this Note.

         3. REMEDIES. Upon the occurrence of a Default and unless such Default
shall have been cured in accordance with the terms of this Note, the Payee may
declare the entire unpaid Principal Amount any all other amounts due hereunder
immediately due and payable. The rights and remedies available to Payee under
this Note shall be cumulative and in addition to any other rights or remedies
that Payee may be entitled to pursue at law or in equity. The exercise of one or
more of such rights or remedies shall not impair Payee's right to exercise any
other right or remedy at law or in equity.
         4. ASSIGNMENT. The rights and obligations of the parties hereunder
shall not be assignable by either party without the consent of the other except
Payee may assign its rights to a Permitted Transferee. For purposes hereof a
Permitted Transferee, shall be (x) a corporation, partnership or other entity,
which is a successor by merger, reorganization, consolidation or similar
corporate transaction, or in which the members of the Payee or any member of the
immediate family of the Payee are the sole owners of the equity interests in
such corporation, partnership or other entity, (y) any member of the Payee or
any adult member of such member's immediate family or any trust established for
the beneficiary of any such persons or, (z) in the case of the dissolution or
liquidation of the Payee, or in the death of any individual Permitted
Transferee, the successor to the same by will, the laws of intestate succession
or the corporate laws of the state of Nevada. To the extent such assignments are
allowed, the provisions of this Note shall be binding upon and inure to the
benefit of the parties hereto and their respective designees, heirs, legal
representatives, successors and assigns, to the extent provided herein.

         5. COSTS. Maker shall pay, on demand, any and all costs and expenses,
including reasonable attorneys' fees, incurred by Payee in connection with a
Default and the collection of any portion of the Principal Amount and Fees
accrued thereon. Maker shall pay Payee an additional fee of $10,000 on the
Maturity Date.

         6. NO CONTINUING WAIVER. The waiver of a Default shall not constitute a
continuing waiver or a waiver of any subsequent Default. Maker hereby waives
presentment, demand, dishonor and notice of nonpayment.

         7. NOTICE. All notices, requests, consents and other communications
which may be desired or required hereunder shall be in writing, and shall be
deemed to have been duly given on the date of delivery if delivered in person to
the party named below, or three (3) days after mailing if deposited in the
United States mail, first class, registered or certified mail, return receipt
requested, with postage prepaid, addressed as follows:

                                      2
<PAGE>

                  If to Maker:              Voice Mobility International, Inc.
                                            180 - 13777 Commerce Parkway
                                            Richmond, B.C. V6V 2X3
                                            Attention: James Hewett, CFO
                                            Telecopier: 604-232-4826

                  If to Payee:              Ibex Investments Ltd.
                                            110 Farm Court
                                            Salt Spring Island, B.C.
                                            B.C. V8K 1H7
                                            Telecopier: 250-537-0873

         8. SEVERABILITY. If any provision of this Note or the application
thereof to any person or circumstance shall be held invalid or unenforceable to
any extent, the remainder of this Note and the application of any such provision
to other persons or circumstances shall not be affected thereby and shall be
enforced to the greatest extent permitted by law.

         9. INTERPRETATION OF DOCUMENT. The parties hereto acknowledge and agree
that this Note has been negotiated arms length and between parties equally
sophisticated and knowledgeable in the matters dealt with in this Note. Each
party has had access to counsel of their selection. Accordingly, any rule of
law, court decision or other legal precedent that would require interpretation
of any ambiguities in this Note against the party that has drafted it is not
applicable and is waived.

         10. GOVERNING LAW AND VENUE. This Note and the rights and obligations
of the parties hereunder and the persons subject hereto shall be governed by,
and construed and interpreted in accordance with, the law of the State of
Nevada, without giving effect to the choice of law principles thereof. Each
party agrees that any proceeding relating to this Note shall be brought in a
state court in Nevada and each party consents to personal jurisdiction in any
such action brought in any such court.

                                            VOICE MOBILITY INTERNATIONAL, INC.,
                                            a Nevada Corporation

                                            By:      /s/ JAMES HEWETT
                                                     ---------------------------
                                            Name:    James Hewett
                                            Title:   CFO

                                      3<PAGE>

Exhibit 10.28: Class K Stock Purchase Warrant

THESE SECURITIES HAVE BEEN ACQUIRED FOR INVESTMENT AND HAVE NOT BEEN REGISTERED
UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"). SUCH
SECURITIES MAY NOT BE OFFERED OR SOLD OR TRANSFERRED IN THE UNITED STATES OR TO
U.S. PERSONS IN THE ABSENCE OF SUCH REGISTRATION OR AN EXEMPTION THEREFROM UNDER
THE SECURITIES ACT WHICH, EXCEPT IN THE CASE OF AN EXEMPTION PURSUANT TO (A)
RULE 144 UNDER THE SECURITIES ACT, OR (B) REGULATION S PROMULGATED UNDER THE
SECURITIES ACT, IS CONFIRMED IN A LEGAL OPINION SATISFACTORY TO THE COMPANY.

Warrant No. K-001                                      Date:     April 25, 2001
                                       Warrant Expiration Date:  April 25, 2004

                         CLASS K STOCK PURCHASE WARRANT
                      TO PURCHASE SHARES OF COMMON STOCK OF
                       VOICE MOBILITY INTERNATIONAL, INC.

         THIS CLASS K STOCK PURCHASE WARRANT (this "WARRANT") certifies that,
for value received, Ibex Investments Ltd. (the "INVESTOR"), is entitled, upon
the terms and subject to the conditions hereinafter set forth, at any time after
the date hereof and on or prior to April 25, 2004 (the "TERMINATION DATE"), but
not thereafter, to subscribe for and purchase from VOICE MOBILITY INTERNATIONAL,
INC., a Nevada corporation (the "COMPANY"), 100,000 shares of Common Stock (the
"WARRANT SHARES") on the terms and at the Exercise Price set forth below. This
Warrant is being issued in connection with the Nonnegotiable Promissory Note
(the "NOTE"), dated as of even date herewith, made by the Company in favor of
the Investor, and is subject to the terms of the Note.

         The purchase price of one share of Common Stock (the "EXERCISE PRICE")
under this Warrant shall be shall be One Dollar and Fifty Cents (US$1.50). The
Exercise Price and the number of shares for which the Warrant is exercisable
shall be subject to adjustment as provided herein.

         1. TITLE OF WARRANT. This Warrant shall be issued in the name of the
Investor. This Warrant is not transferable.

         2. AUTHORIZATION OF SHARES. The Company covenants that all shares of
Common Stock which may be issued upon the exercise of rights represented by this
Warrant will, upon exercise of the rights represented by this Warrant and
payment in full of the Exercise Price, be duly authorized, validly issued, fully
paid and nonassessable and free from all taxes, liens and charges in respect of
the issue thereof (other than taxes in respect of any transfer occurring
contemporaneously with such issue).

         3. EXERCISE OF WARRANT. This Warrant may not be exercised in the United
States or by or on behalf of a U.S. person unless it has been registered under
the

                                      1
<PAGE>

Securities Act of 1933, as amended (the "SECURITIES Act"), and any applicable
State securities laws, or unless an exemption from such registration
requirements is available. Exercise of the purchase rights represented by this
Warrant may be made at any time or times one day after the date hereof, in whole
or in part, before the close of business on the Termination Date by the
surrender of this Warrant and the Notice of Exercise annexed hereto duly
executed, at the office of the Company (or such other office or agency of the
Company as it may designate by notice in writing to the Investor at the address
of the Investor appearing on the books of the Company) and upon payment of the
Exercise Price of the shares thereby purchased; whereupon the Investor shall be
entitled to receive a certificate for the number of shares of Common Stock so
purchased. Certificates for shares purchased hereunder shall be delivered to the
Investor within five (5) business days after the date on which this Warrant
shall have been exercised as aforesaid. Payment of the Exercise Price of the
shares may be by certified check or cashier's check or by wire transfer to an
account designated by the Company in an amount equal to the Exercise Price
multiplied by the number of shares being purchased.

         4. NO FRACTIONAL SHARES OR SCRIP. No fractional shares or scrip
representing fractional shares shall be issued upon the exercise of this
Warrant.

         5. CHARGES, TAXES AND EXPENSES. Issuance of certificates for shares of
Common Stock upon the exercise of this Warrant shall be made without charge to
the Investor for any issue or transfer tax or other incidental expense in
respect of the issuance of such certificate, all of which taxes and expenses
shall be paid by the Company, and such certificates shall be issued in the name
of the Investor.

         6. RESTRICTIONS ON TRANSFER OF WARRANT SHARES.

                  (a) Investor hereby agrees that Investor shall sell not,
transfer, assign or distribute, either directly or indirectly, any of the
Warrant Shares other than in accordance with and pursuant to the Securities Act
and any exemptions from registration thereunder, including without limitation,
Rule 144 or Regulation S. Notwithstanding the foregoing, Investor agrees that
Investor will not transfer, assign or distribute, either directly or indirectly,
any of the Warrant Shares pursuant to an exemption from registration under the
Securities Act and any applicable State securities laws unless all appropriate
action necessary for compliance with such exemption (including Rule 144
promulgated under the Securities Act) shall have been taken. Any transferee of
the Warrant Shares must agree in writing to comply with the provisions of this
Section 6(a) with respect to any resale or other disposition of such securities.

                  (b) The Company shall not be required to: (i) transfer on its
books any Warrant Shares that have been sold, transferred, assigned or
distributed in violation of the provisions of Section 6(a), or (ii) treat as the
owner of the Warrant Shares, or otherwise to accord voting or dividend rights
to, any transferee to whom Warrant Shares have been transferred in contravention
of this Agreement.

                  (c) Unless the Warrant Shares have been registered under the
Securities Act, or are exempt from registration, upon exercise of the Warrant or
any

                                      2
<PAGE>

portion thereof and the issuance of any Warrant Shares, all certificates
representing Warrant Shares shall bear on the face thereof substantially the
following legend:

                  THE SECURITIES EVIDENCED BY THIS CERTIFICATE HAVE BEEN
                  ACQUIRED FOR INVESTMENT AND HAVE NOT BEEN AND WILL NOT BE
                  REGISTERED UNDER THE UNITED STATES SECURITIES ACT OF 1933, AS
                  AMENDED (THE "SECURITIES ACT"), OR UNDER SECURITIES LAWS OF
                  ANY STATE OR OTHER JURISDICTION, AS APPLICABLE, AND MAY NOT BE
                  SOLD, TRANSFERRED, ASSIGNED, PLEDGED OR HYPOTHECATED OR
                  OTHERWISE DISPOSED OF EXCEPT (A) IN ACCORDANCE WITH THE
                  PROVISIONS OF REGULATION S PROMULGATED UNDER THE SECURITIES
                  ACT, (B) PURSUANT TO REGISTRATION UNDER THE SECURITIES ACT AND
                  APPROPRIATE QUALIFICATION UNDER THE SECURITIES LAWS OF ANY
                  APPLICABLE STATE, OR (C) PURSUANT TO AN EXEMPTION FROM THE
                  REGISTRATION REQUIREMENTS OF THE SECURITIES ACT AND ANY
                  APPLICABLE STATE SECURITIES LAWS. NO HEDGING TRANSACTIONS
                  INVOLVING THE SECURITIES EVIDENCED BY THIS CERTIFICATE MAY BE
                  CONDUCTED EXCEPT IN COMPLIANCE WITH THE SECURITIES ACT.
The Investor agrees and acknowledges that this Warrant is being purchased for
its own account, for investment purposes only, and not for the account of any
other person, and not with a view to distribution, assignment, pledge or resale
to others or to fractionalization in whole or in part. The Investor further
represents, warrants and agrees as follows: no other person has or will have a
direct or indirect beneficial interest in this Warrant and the Investor will not
sell, hypothecate or otherwise transfer the Warrant except in accordance with
the Securities Act and applicable state securities laws or unless, in the
opinion of counsel for the Investor acceptable to the Company, an exemption from
the registration requirements of the Securities Act and such laws is available;
and that Investor is an "accredited investor" under the Securities Act.

         7. CLOSING OF BOOKS. The Company will at no time close its shareholder
books or records in any manner which interferes with the timely exercise of this
Warrant.

         8. NO RIGHTS AS SHAREHOLDER UNTIL EXERCISE. This Warrant does not
entitle the Investor to any voting rights or other rights as a shareholder of
the Company prior to the exercise thereof. If, however, at the time of the
surrender of this Warrant and purchase of Warrant Shares the Investor shall be
entitled to exercise this Warrant, the shares so purchased shall be and be
deemed to be issued to the Investor as the record owner of such shares as of the
close of business on the date on which this Warrant shall have been exercised.

         9. LOSS, THEFT, DESTRUCTION OR MUTILATION OF WARRANT. The Company
represents and warrants that upon receipt by the Company of evidence reasonably
satisfactory to it of the loss, theft, destruction or mutilation of any Warrant,
and in case of

                                      3
<PAGE>

loss, theft or destruction, of indemnity or security reasonably satisfactory to
it, and upon reimbursement to the Company of all reasonable expenses incidental
thereto, and upon surrender and cancellation of such Warrant, if mutilated, the
Company will make and deliver a new Warrant of like tenor and dated as of such
cancellation, in lieu of this Warrant.

         10. SATURDAYS, SUNDAYS, HOLIDAYS, ETC. If the last or appointed day for
the taking of any action or the expiration of any right required or granted
herein shall be a Saturday, Sunday or a legal holiday in the United States, then
such action may be taken or such right may be exercised on the next succeeding
day not a Saturday, Sunday or legal holiday.

         11. ADJUSTMENTS OF EXERCISE PRICE AND NUMBER OF WARRANT SHARES. In the
event of any stock split, reverse stock split, stock dividend, reclassification
or similar event affecting the Common Stock occurring after the date hereof
(each an "ADJUSTMENT TRANSACTION"), (i) the Exercise Price shall be adjusted by
multiplying it by a fraction, the numerator of which shall be the number of
shares of Common Stock outstanding immediately prior to such Adjustment
Transaction, and the denominator of which shall be the number of shares of
Common Stock outstanding immediately after such Adjustment Transaction, and (ii)
the number of Warrant Shares purchasable upon exercise of this Warrant
immediately prior thereto shall be adjusted by multiplying it by a fraction, the
numerator of which shall be the number of shares of Common Stock outstanding
immediately after such Adjustment Transaction, and the denominator of which
shall be the number of shares of Common Stock outstanding immediately prior to
such Adjustment Transaction; PROVIDED, HOWEVER, that the Company shall not issue
any fractional shares of Common Stock in any exercise of this Warrant, and the
number of shares of Common Stock issuable upon such exercise, if not a whole
number, shall be rounded up to the next whole number of shares.

         12. VOLUNTARY ADJUSTMENT BY THE COMPANY. The Company may at its
discretion, at any time during the term of this Warrant, reduce the then current
Exercise Price to any amount and for any period of time deemed appropriate by
the Board of Directors of the Company.

         13. NOTICE OF ADJUSTMENT. Whenever the number of Warrant Shares or
number or kind of securities or other property purchasable upon the exercise of
this Warrant or the Exercise Price is adjusted as herein provided, the Company
shall promptly mail by registered or certified mail, return receipt requested,
to the Investor notice of such adjustment or adjustments setting forth the
number of Warrant Shares (and other securities or property) purchasable upon the
exercise of this Warrant and the Exercise Price of such Warrant Shares after
such adjustment, setting forth a brief statement of the facts requiring such
adjustment and setting forth computation by which such adjustment was made. Such
notice, in absence of manifest error, shall be conclusive evidence of the
correctness of such adjustment.

         14. AUTHORIZED SHARES. The Company covenants that during the period the
Warrant is outstanding, it will reserve from its authorized and unissued Common
Stock a

                                      4
<PAGE>

sufficient number of shares to provide for the issuance of the Warrant Shares
upon the exercise of any rights under this Warrant. The Company further
covenants that its issuance of this Warrant shall constitute full authority to
its officers who are charged with the duty of executing stock certificates to
execute and issue the necessary certificates for shares of the Company's Common
Stock upon the exercise of the purchase rights under this Warrant. The Company
will take all such reasonable action as may be necessary to assure that such
shares of Common Stock may be issued as provided herein without violation of any
applicable law or regulation, or of any requirements of the OTC Bulletin Board
or any domestic securities exchange upon which the Common Stock may be listed.

         15. MISCELLANEOUS.

                  (a) ISSUE DATE; JURISDICTION. The provisions of this Warrant
shall be construed and shall be given effect in all respects as if it had been
issued and delivered by the Company on the date hereof. This Warrant shall be
binding upon any successors or assigns of the parties hereto. This Warrant shall
constitute a contract under the laws and jurisdiction of the state of Nevada and
for all purposes shall be construed in accordance with and governed by the laws
of said state without regard to its conflict of law, principles or rules.

                  (b) RESTRICTIONS. The Investor acknowledges that the Common
Stock acquired upon the exercise of this Warrant, if not registered, may have
restrictions upon its resale imposed by state and federal securities laws.

                  (c) MODIFICATION AND WAIVER. This Warrant and any provisions
hereof may be changed, waived, discharged or terminated only by an instrument in
writing signed by the party against which enforcement of the same is sought.

                  (d) NOTICES. Any notice, request or other document required or
permitted to be given or delivered to the Investor or the Company shall be
delivered or shall be sent by certified or registered mail, postage prepaid, to
the Investor at its address as shown on the books of the Company or to the
Company at the address set forth in the Note.

         IN WITNESS WHEREOF, the Company has caused this Warrant to be executed
by its officers thereunto duly authorized.
Dated:   April 25, 2001

                                   VOICE MOBILITY INTERNATIONAL, INC.

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

                                      5
<PAGE>

                               NOTICE OF EXERCISE

To:      Voice Mobility International, Inc.

                  (1) The undersigned hereby elects to purchase
_________________ shares of Common Stock of Voice Mobility International, Inc.
pursuant to the terms of the attached Warrant, and tenders herewith payment of
the purchase price in full, together with all applicable transfer taxes, if any.

                  (2) Please issue a certificate or certificates representing
said shares of Common Stock in the name of the undersigned.

Dated:                                 [INVESTOR]
      -------------

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

NOTE: Signature must conform in all respects to holder's name as specified on
the face of the attached warrant.

                                      6

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00025-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00025-of-00352.parquet"}]]