Document:

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                                                                    EXHIBIT 10.3

                                SIGNALSOFT CORP.

                           INVESTORS' RIGHTS AGREEMENT

                                 AUGUST 1, 1996

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                                SIGNALSOFT CORP.

                           INVESTORS' RIGHTS AGREEMENT

         This Investors' Rights Agreement (the "Agreement") is made as of the
1st day of August, 1996 by and among SignalSoft Corp., a Colorado corporation
(the "Company"), the investors listed on Exhibit A hereto, each of which is
herein referred to as an "Investor," and David Hose, Mark Flolid and Jim Fitch,
each of whom is herein referred to as a "Founder".

                                    RECITALS

         The Company and the Investors have entered into a Series A Preferred
Stock Purchase Agreement (the "Purchase Agreement") of even date herewith
pursuant to which the Company desires to sell to the Investors and the Investors
desire to purchase from the Company shares of the Company's Series A Preferred
Stock. A condition to the Investors' obligations under the Purchase Agreement is
that the Company, the Founders and the Investors enter into this Agreement in
order to provide the Investors with (i) certain rights to register shares of the
Company's Common Stock issuable upon conversion of the Series A Preferred Stock
held by the Investors, (ii) certain rights to receive or inspect information
pertaining to the Company, and (iii) a right of first offer with respect to
certain issuances by the Company of its securities. The Company, the Investors
and the Founders each desire to induce the Investors to purchase shares of
Series A Preferred Stock pursuant to the Purchase Agreement by agreeing to the
terms and conditions set forth herein.

                                    AGREEMENT

         1.       REGISTRATION RIGHTS. The Company and the Investors covenant
and agree as follows:

                  1.1      DEFINITIONS. For purposes of this Section 1:

                           (a) The terms "register", "registered", and
"registration" refer to a registration effected by preparing and filing a
registration statement or similar document in compliance with the Securities Act
of 1933, as amended (the "Act"), and the declaration or ordering of
effectiveness of such registration statement or document;

                           (b) The term "Registrable Securities" means (i) the
shares of Common Stock issuable or issued upon conversion of the Series A
Preferred Stock (such shares of Common Stock are collectively referred to
hereinafter as the "Stock"), (ii) any other shares of Common Stock of the
Company issued as (or issuable upon the conversion or exercise of any warrant,
right or other security which is issued as) a dividend or other distribution
with respect to, or in exchange for or in replacement of, the Stock, and (iii)
the shares of Common Stock issued prior to August 1, 1996 to the Founders
(including any other shares of Common Stock of the Company issued as a dividend
or other distribution with respect to, or in exchange for or in replacement of,
such Common Stock)(the "Founders' Stock"), provided, however, that for the
purposes of Section 1.10, the Founders' Stock shall not be deemed Registrable
Securities and the Founders shall not be deemed Holders and provided, further,
that the foregoing definition shall exclude in all cases any

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Registrable Securities sold by a person in a transaction in which his or her
rights under this Agreement are not assigned in accordance with the provisions
of this Agreement. Notwithstanding the foregoing, Common Stock or other
securities shall only be treated as Registrable Securities if and so long as
they have not been (A) sold to or through a broker or dealer or underwriter in a
public distribution or a public securities transaction, or (B) sold in a
transaction exempt from the registration and prospectus delivery requirements of
the Act under Section 4(1) thereof so that all transfer restrictions, and
restrictive legends with respect thereto, if any, are removed upon the
consummation of such sale;

                           (c) The number of shares of "Registrable Securities
then outstanding" shall be determined by the number of shares of Common Stock
outstanding which are, and the number of shares of Common Stock issuable
pursuant to then exercisable or convertible securities which are, Registrable
Securities;

                           (d) The term "Holder" means any person owning or
having the right to acquire Registrable Securities or any assignee thereof in
accordance with Section 1.11 hereof;

                           (e) The term "Form S-3" means such form under the Act
as in effect on the date hereof or any successor form under the Act; and

                           (f) The term "SEC" means the Securities and Exchange
Commission.

                  1.2      COMPANY REGISTRATION. If (but without any obligation
to do so) the Company proposes to register (including for this purpose a
registration effected by the Company for stockholders other than the Holders)
any of its stock under the Act in connection with the public offering of such
securities solely for cash (other than a registration relating solely to the
sale of securities to participants in a Company stock plan or a transaction
covered by Rule 145 under the Act, a registration in which the only stock being
registered is Common Stock issuable upon conversion of debt securities which are
also being registered, or any registration on any form which does not include
substantially the same information as would be required to be included in a
registration statement covering the sale of the Registrable Securities), the
Company shall, at such time, promptly give each Holder written notice of such
registration. Upon the written request of each Holder given within thirty (30)
days after mailing of such notice by the Company in accordance with Section 3.5,
the Company shall, subject to the provisions of Section 1.6, use its best
efforts to cause to be registered under the Act all of the Registrable
Securities that each such Holder has requested to be registered. Each Investor
shall be bound by the Company's choice of managing underwriter.

                  1.3      OBLIGATIONS OF THE COMPANY. Whenever required under
this Section 1 to use its best efforts to effect the registration of any
Registrable Securities, the Company shall, as expeditiously as reasonably
possible:

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                           (a) Prepare and file with the SEC a registration
statement that includes such Registrable Securities and use its best efforts to
cause such registration statement to become effective, and, upon the request of
the Holders of a majority of the Registrable Securities registered thereunder,
keep such registration statement effective for up to one hundred twenty (120)
days or until all of such Registrable Securities have been disposed of (if
earlier).

                           (b) Prepare and file with the SEC such amendments and
supplements to such registration statement and the prospectus used in connection
with such registration statement as may be necessary to comply with the
provisions of the Act with respect to the disposition of all securities covered
by such registration statement for up to one hundred eighty (180) days or until
all of such Registrable Securities have been disposed of (if earlier).

                           (c) Furnish to the Holders such numbers of copies of
a prospectus, including a preliminary prospectus, in conformity with the
requirements of the Act, and such other documents as they may reasonably request
in order to facilitate the disposition of Registrable Securities owned by them.

                           (d) Use its best efforts to register and qualify the
securities covered by such registration statement under such other securities or
Blue Sky laws of such states or jurisdictions as shall be reasonably requested
by the Holders, provided that the Company shall not be required in connection
therewith or as a condition thereto to qualify to do business or to file a
general consent to service of process in any such states or jurisdictions.

                           (e) In the event of any underwritten public offering,
enter into and perform its obligations under an underwriting agreement, in usual
and customary form, with the managing underwriter of such offering. Each Holder
participating in such underwriting shall also enter into and perform its
obligations under such an agreement.

                           (f) Notify each Holder of Registrable Securities
covered by such registration statement at any time when a prospectus relating
thereto is required to be delivered under the Act of the happening of any event
as a result of which the prospectus included in such registration statement, as
then in effect, includes an untrue statement of a material fact or omits to
state a material fact required to be stated therein or necessary to make the
statements therein not misleading in the light of the circumstances then
existing, such obligation to continue for one hundred eighty (180) days.

                           (g) Cause all such Registrable Securities registered
pursuant hereunder to be listed on each securities exchange or market on which
similar securities issued by the Company are then listed.

                           (h) Provide a transfer agent and registrar for all
Registrable Securities (which may be the same entity and may be the Company if
the Company is registrar and

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transfer agent for all its outstanding securities) registered pursuant hereunder
and a CUSIP number for all such Registrable Securities, in each case not later
than the effective date of such registration.

                           (i) Use its best efforts to furnish, at the request
of any Holder requesting registration of Registrable Securities pursuant to this
Section 1, on the date that such Registrable Securities are delivered to the
underwriters for sale in connection with a registration pursuant to this Section
1, if such securities are being sold through underwriters, or, if such
securities are not being sold through underwriters, on the date that the
registration statement with respect to such securities becomes effective, (i) an
opinion, dated such date, of the counsel representing the Company for the
purposes of such registration, in form and substance as is customarily given to
underwriters in an underwritten public offering, addressed to the underwriters,
if any, and to the Holders requesting registration of Registrable Securities and
(ii) a letter dated such date, from the independent certified public accountants
of the Company, in form and substance as is customarily given by independent
certified public accountants to underwriters in an underwritten public offering,
addressed to the underwriters, if any, and to the Holders requesting
registration of Registrable Securities.

                  1.4      FURNISH INFORMATION. It shall be a condition
precedent to the obligations of the Company to take any action pursuant to this
Section 1 with respect to the Registrable Securities of any selling Holder that
such Holder shall furnish to the Company such information regarding itself, the
Registrable Securities held by it, and the intended method of disposition of
such securities as shall be required to effect the registration of such Holder's
Registrable Securities. The Company shall have no obligation with respect to any
registration requested pursuant to Section 1.10 of this Agreement if, as a
result of the application of the preceding sentence, the number of shares or the
anticipated aggregate offering price of the Registrable Securities to be
included in the registration does not equal or exceed the number of shares or
the anticipated aggregate offering price required to originally trigger the
Company's obligation to initiate such registration as specified in subsection
1.10(b)(2).

                  1.5      EXPENSES OF COMPANY REGISTRATION. The Company shall
bear and pay all expenses incurred in connection with any registration, filing
or qualification of Registrable Securities with respect to the registrations
pursuant to Section 1.2 for each Holder (which right may be assigned as provided
in Section 1.11), including (without limitation) all registration, filing, and
qualification fees, printers' and accounting fees relating or apportionable
thereto and the reasonable fees and disbursements of one counsel for the selling
Holders selected by them with the approval of the Company, which approval shall
not be unreasonably withheld, but excluding underwriting discounts and
commissions relating to Registrable Securities.

                  1.6      UNDERWRITING REQUIREMENTS. In connection with any
offering involving an underwriting of shares of the Company's capital stock, the
Company shall not be required under Section 1.2 to include any of the Holders'
securities in such underwriting unless they accept the terms of the underwriting
as agreed upon between the Company and the underwriters selected by the Company
(or by other persons entitled to select the underwriters), and then only in

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such quantity as the underwriters determine in their sole discretion will not
jeopardize the success of the offering by the Company. If the total amount of
securities, including Registrable Securities, requested by stockholders to be
included in such offering exceeds the amount of securities sold other than by
the Company that the underwriters determine in their sole discretion is
compatible with the success of the offering, then the Company shall be required
to include in the offering only that number of such securities, including
Registrable Securities, which the underwriters determine in their sole
discretion will not jeopardize the success of the offering (the securities so
included to be apportioned pro rata among the selling stockholders, including
the Founders, according to the total amount of securities entitled to be
included therein owned by each selling stockholder, including the Founders, or
in such other proportions as shall mutually be agreed to by such selling
stockholders, including the Founders) but in no event shall the amount of
securities of the selling Holders included in the offering be reduced below
thirty percent (30%) of the total amount of securities included in such
offering, unless such offering is the initial public offering of the Company's
securities in which case the selling stockholders may be excluded if the
underwriters make the determination described above and no other stockholder's
securities are included. For purposes of the preceding parenthetical concerning
apportionment, for any selling stockholder which is a holder of Registrable
Securities and which is a partnership or corporation, the partners, retired
partners and stockholders of such holder, or the estates and family members of
any such partners and retired partners and any trusts for the benefit of any of
the foregoing persons shall be deemed to be a single "selling stockholder", and
any pro-rata reduction with respect to such "selling stockholder" shall be based
upon the aggregate amount of shares carrying registration rights owned by all
entities and individuals included in such "selling stockholder", as defined in
this sentence.

                  1.7      DELAY OF REGISTRATION. No Holder shall have any right
to obtain or seek an injunction restraining or otherwise delaying any such
registration as the result of any controversy that might arise with respect to
the interpretation or implementation of this Section 1.

                  1.8      INDEMNIFICATION. In the event any Registrable
Securities are included in a registration statement under this Section 1:

                           (a) To the extent permitted by law, the Company will
indemnify and hold harmless each Holder, any underwriter (as defined in the Act)
for such Holder and each person, if any, who controls such Holder or underwriter
within the meaning of the Act or the Securities Exchange Act of 1934, as amended
(the "Exchange Act"), against any losses, claims, damages, or liabilities (joint
or several) to which they may become subject under the Act, the Exchange Act or
other federal or state law, insofar as such losses, claims, damages, or
liabilities (or actions in respect thereof) arise out of or are based upon any
of the following statements, omissions or violations (collectively a
"Violation"): (i) any untrue statement or alleged untrue statement of a material
fact contained in such registration statement, including any preliminary
prospectus or final prospectus contained therein or any amendments or
supplements thereto, (ii) the omission or alleged omission to state therein a
material fact required to be stated therein, or necessary to make the statements
therein, in light of the circumstances under which they were made, not
misleading, or (iii) any violation or alleged violation by the Company of the
Act, or the Exchange Act, or any rule

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or regulation promulgated under the Act or the Exchange Act or any state
securities law or any rule or regulation thereunder applicable to the Company
and relating to action or inaction required of the Company in connection with
such registration or qualification under such state securities law, and
the Company will pay to each such Holder, underwriter or controlling person, as
incurred, any legal or other expenses reasonably incurred by them in connection
with investigating or defending any such loss, claim, damage, liability, or
action; provided, however, that the indemnity agreement contained in this
subsection 1.8(a) shall not apply to amounts paid in settlement of any such
loss, claim, damage, liability, or action if such settlement is effected without
the consent of the Company (which consent shall not be unreasonably withheld),
nor shall the Company be liable in any such case for any such loss, claim,
damage, liability, or action to the extent that it arises out of or is based
upon a Violation which occurs in reliance upon and in conformity with written
information furnished expressly for use in connection with such registration by
any such Holder, underwriter or controlling person.

                           (b) To the extent permitted by law, each selling
Holder will indemnify and hold harmless the Company, each of its directors, each
of its officers who has signed the registration statement, each person, if any,
who controls the Company within the meaning of the Act, any underwriter, any
other Holder selling securities in such registration statement and any
controlling person of any such underwriter or other Holder, against any losses,
claims, damages, or liabilities (joint or several) to which any of the foregoing
persons may become subject, under the Act, the Exchange Act or other federal or
state law, insofar as such losses, claims, damages, or liabilities (or actions
in respect thereto) arise out of or are based upon any Violation, in each case
to the extent (and only to the extent) that such Violation occurs in reliance
upon and in conformity with written information furnished by such Holder
expressly for use in connection with such registration; and each such Holder
will pay, as incurred, any legal or other expenses reasonably incurred by any
person intended to be indemnified pursuant to this subsection 1.8(b), in
connection with investigating or defending any such loss, claim, damage,
liability, or action; provided, however, that the indemnity agreement contained
in this subsection 1.8(b) shall not apply to amounts paid in settlement of any
such loss, claim, damage, liability or action if such settlement is effected
without the consent of the Holder, which consent shall not be unreasonably
withheld; provided, that, in no event shall any indemnity under this subsection
1.8(b) exceed the net proceeds from the offering received by such Holder, except
in the case of willful fraud by such Holder.

                           (c) Promptly after receipt by an indemnified party
under this Section 1.8 of notice of the commencement of any action (including
any governmental action), such indemnified party will, if a claim in respect
thereof is to be made against any indemnifying party under this Section 1.8,
deliver to the indemnifying party a written notice of the commencement thereof
and the indemnifying party shall have the right to participate in, and, to the
extent the indemnifying party so desires, jointly with any other indemnifying
party similarly noticed, to assume the defense thereof with counsel mutually
satisfactory to the parties; provided, however, that an indemnified party
(together with all other indemnified parties which may be represented without
conflict by one counsel) shall have the right to retain one separate counsel,
with the reasonable fees and expenses to be paid by the indemnifying party, if
representation of such indemnified party by

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the counsel retained by the indemnifying party would be inappropriate due to
actual or potential differing interests between such indemnified party and any
other party represented by such counsel in such proceeding. The failure to
deliver written notice to the indemnifying party within a reasonable time of the
commencement of any such action, if prejudicial to its ability to defend such
action, shall relieve such indemnifying party of any liability to the
indemnified party under this Section 1.8, but the omission so to deliver written
notice to the indemnifying party will not relieve it of any liability that it
may have to any indemnified party otherwise than under this Section 1.8.

                           (d) If the indemnification provided for in this
Section 1.8 is held by a court of competent jurisdiction to be unavailable to an
indemnified party with respect to any loss, liability, claim, damage, or expense
referred to therein, then the indemnifying party, in lieu of indemnifying such
indemnified party hereunder, shall contribute to the amount paid or payable by
such indemnified party as a result of such loss, liability, claim, damage, or
expense in such proportion as is appropriate to reflect the relative fault of
the indemnifying party on the one hand and of the indemnified party on the other
in connection with the statements or omissions that resulted in such loss,
liability, claim, damage, or expense as well as any other relevant equitable
considerations; provided, that, in no event shall any contribution by a Holder
under this Subsection 1.8(d) exceed the net proceeds from the offering received
by such Holder, except in the case of willful fraud by such Holder. The relative
fault of the indemnifying party and of the indemnified party shall be determined
by reference to, among other things, whether the untrue or alleged untrue
statement of a material fact or the omission to state a material fact relates to
information supplied by the indemnifying party or by the indemnified party and
the parties' relative intent, knowledge, access to information, and opportunity
to correct or prevent such statement or omission.

                           (e) Notwithstanding the foregoing, to the extent that
the provisions on indemnification and contribution contained in the underwriting
agreement entered into in connection with the underwritten public offering are
in conflict with the foregoing provisions, the provisions in the underwriting
agreement shall control.

                           (f) The obligations of the Company and Holders under
this Section 1.8 shall survive the completion of any offering of Registrable
Securities in a registration statement under this Section 1, and otherwise.

                  1.9      REPORTS UNDER SECURITIES EXCHANGE ACT OF 1934. With a
view to making available to the Holders the benefits of Rule 144 promulgated
under the Act and any other rule or regulation of the SEC that may at any time
permit a Holder to sell securities of the Company to the public without
registration or pursuant to a registration on Form S-3, the Company agrees to:

                           (a) make and keep public information available, as
those terms are understood and defined in SEC Rule 144, at all times after
ninety (90) days after the effective date of the first registration statement
filed by the Company for the offering of its securities to the general public so
long as the Company remains subject to the periodic reporting requirements under
Sections 13 or 15(d) of the Exchange Act;

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                           (b) take such action, including the voluntary
registration of its Common Stock under Section 12 of the Exchange Act, as is
necessary to enable the Holders to utilize Form S-3 for the sale of their
Registrable Securities, such action to be taken as soon as practicable after the
end of the fiscal year in which the first registration statement filed by the
Company for the offering of its securities to the general public is declared
effective;

                           (c) file with the SEC in a timely manner all reports
and other documents required of the Company under the Act and the Exchange Act;
and

                           (d) furnish to any Holder, so long as the Holder owns
any Registrable Securities, forthwith upon request (i) a written statement by
the Company that it has complied with the reporting requirements of SEC Rule 144
(at any time after ninety (90) days after the effective date of the first
registration statement filed by the Company), the Act and the Exchange Act (at
any time after it has become subject to such reporting requirements), or that it
qualifies as a registrant whose securities may be resold pursuant to Form S-3
(at any time after it so qualifies), (ii) a copy of the most recent annual or
quarterly report of the Company and such other reports and documents so filed
under the Exchange Act by the Company, and (iii) such other information as may
be reasonably requested in availing any Holder of any rule or regulation of the
SEC which permits the selling of any such securities without registration or
pursuant to such form.

                  1.10 FORM S-3 REGISTRATION. In case the Company shall receive
from any Holder or Holders of not less than thirty percent (30%) of the
Registrable Securities then outstanding a written request or requests that the
Company effect a registration on Form S-3 and any related qualification or
compliance with respect to all or a part of the Registrable Securities owned by
such Holder or Holders, the Company will:

                           (a) promptly give written notice of the proposed
registration, and any related qualification or compliance, to all other Holders;
and

                           (b) as soon as practicable, effect such registration
and all such qualifications and compliances as may be so requested and as would
permit or facilitate the sale and distribution of all or such portion of such
Holder's or Holders' Registrable Securities as are specified in such request,
together with all or such portion of the Registrable Securities of any other
Holder or Holders joining in such request as are specified in a written request
given within 15 days after receipt of such written notice from the Company;
provided, however, that the Company shall not be obligated to effect any such
registration, qualification or compliance, pursuant to this Section 1.10: (1) if
Form S-3 is not available for such offering by the Holders; (2) if the Holders,
together with the holders of any other securities of the Company entitled to
inclusion in such registration, propose to sell Registrable Securities and such
other securities (if any) at an aggregate price to the public (net of any
underwriters' discounts or commissions) of less than $500,000; (3) if the
Company shall furnish to the Holders a certificate signed by the President of
the Company stating that in the good faith judgment of the Board of Directors of
the Company, it would be seriously detrimental to the Company and its
stockholders for such Form S-3 Registration to be effected at such time, in
which

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event the Company shall have the right to defer the filing of the Form S-3
registration statement for a period of not more than 120 days after receipt of
the request of the Holder or Holders under this Section 1.10; provided, however,
that the Company shall not utilize this right more than once in any twelve month
period; (4) if the Company has, within the nine (9) month period preceding the
date of such request, already effected one registration on Form S-3 for the
Holders pursuant to this Section 1.10; or (5) in any particular jurisdiction in
which the Company would be required to qualify to do business or to execute a
general consent to service of process in effecting such registration,
qualification or compliance.

                           (c) Subject to the foregoing, the Company shall file
a registration statement covering the Registrable Securities and other
securities so requested to be registered as soon as practicable after receipt of
the request or requests of the Holders. All expenses incurred in connection with
a registration requested pursuant to Section 1.10, including (without
limitation) all registration, filing, qualification, printers' and accounting
fees and the reasonable fees and disbursements of counsel for the selling Holder
or Holders and counsel for the Company, shall be borne pro rata by the Holder or
Holders participating in the Form S-3 Registration.

                  1.11     ASSIGNMENT OF REGISTRATION RIGHTS. The rights to
cause the Company to register Registrable Securities pursuant to this Section 1
may be assigned (but only with all related obligations) by a Holder to a
transferee or assignee of at least 100,000 shares of such securities, provided
the Company is, within a reasonable time after such transfer, furnished with
written notice of the name and address of such transferee or assignee and the
securities with respect to which such registration rights are being assigned;
and provided, further, that such assignment shall be effective only if
immediately following such transfer the further disposition of such securities
by the transferee or assignee is restricted under the Act and such person as a
condition to the effectiveness of such assignment executes a counterpart to this
agreement agreeing to be treated as a Holder. For the purposes of determining
the number of shares of Registrable Securities held by a transferee or assignee,
the holdings of transferees and assignees of a partnership who are partners or
retired partners of such partnership (including spouses and ancestors, lineal
descendants and siblings of such partners or spouses who acquire Registrable
Securities by gift, will or intestate succession) shall be aggregated together
and with the partnership; provided that all assignees and transferees who would
not qualify individually for assignment of registration rights shall have a
single attorney-in-fact for the purpose of exercising any rights, receiving
notices or taking any action under Section 1.

                  1.12     "MARKET STAND-OFF" AGREEMENT. Each Holder hereby
agrees that, during the period of duration (up to, but not exceeding, 180 days)
specified by the Company and an underwriter of Common Stock or other securities
of the Company, following the date of the final prospectus distributed in
connection with a registration statement of the Company filed under the Act, it
shall not, to the extent requested by the Company and such underwriter, directly
or indirectly sell, offer to sell, contract to sell (including, without
limitation, any short sale), grant any option to purchase or otherwise transfer
or dispose of (other than to donees who agree to be similarly bound) any
securities of the Company held by it at any time during such period except
Common Stock included in such registration; provided, however, that:

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                           (a) such agreement shall be applicable only to the
first such registration statement of the Company which covers Common Stock (or
other securities) to be sold on its behalf to the public in an underwritten
offering; and

                           (b) all officers and directors of the Company, all
one-percent security holders, and all other persons with registration rights
(whether or not pursuant to this Agreement) enter into similar agreements.

         In order to enforce the foregoing covenant, the Company may impose
stop-transfer instructions with respect to the Registrable Securities of each
Holder (and the shares or securities of every other person subject to the
foregoing restriction) until the end of such period, and each Holder agrees
that, if so requested, such Holder will execute an agreement in the form
provided by the underwriter containing terms which are essentially consistent
with the provisions of this Section 1.12.

         Notwithstanding the foregoing, the obligations described in this
Section 1.12 shall not apply to a registration relating solely to employee
benefit plans on Form S-1 or Form S-8 or similar forms which may be promulgated
in the future, or a registration relating solely to an SEC Rule 145 transaction
on Form S-4 or similar forms which may be promulgated in the future.

                  1.13     TERMINATION OF REGISTRATION RIGHTS. No Holder shall
be entitled to exercise any right provided for in this Section 1 after the later
of (i) two (2) years following the consummation of the sale of securities
pursuant to a registration statement filed by the Company under the Act in
connection with the initial firm commitment underwritten offering of its
securities to the general public, or (ii) such time as Rule 144 or another
similar exemption under the Act is available for the sale of all of such
Holder's shares during a three (3)-month period without registration.

         2.       COVENANTS OF THE COMPANY.

                  2.1      DELIVERY OF FINANCIAL STATEMENTS. The Company shall
deliver to each Investor holding, and to transferees of, at least 100,000 shares
of Registrable Securities:

                           (a) as soon as practicable, but in any event within
sixty (60) days after the end of each fiscal year of the Company, an income
statement for such fiscal year, a balance sheet of the Company and statement of
stockholder's equity as of the end of such year, and a statement of cash flows
for such year, such year-end financial reports to be in reasonable detail,
prepared in accordance with generally accepted accounting principles ("GAAP"),
and audited and certified by an independent public accounting firm of nationally
recognized standing selected by the Company;

                           (b) as soon as practicable, but in any event within
thirty (30) days after the end of each of the first three (3) quarters of each
fiscal year of the Company, an unaudited

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profit or loss statement, a statement of cash flows for such fiscal quarter and
an unaudited balance sheet as of the end of such fiscal quarter;

                           (c) within thirty (30) days of the end of each month,
an unaudited income statement and a statement of cash flows and balance sheet
for and as of the end of such month, in reasonable detail;

                           (d) as soon as practicable, but in any event thirty
(30) days prior to the end of each fiscal year, a budget and business plan for
the next fiscal year, prepared on a monthly basis, including balance sheets and
sources and applications of funds statements for such months and, as soon as
prepared, any other budgets or revised budgets prepared by the Company;

                           (e) with respect to the financial statements called
for in subsections (b) and (c) of this Section 2.1, an instrument executed by
the Chief Financial Officer or President of the Company and certifying that such
financials were prepared in accordance with GAAP consistently applied with prior
practice for earlier periods (with the exception of footnotes that may be
required by GAAP) and fairly present the financial condition of the Company and
its results of operation for the period specified, subject to year-end audit
adjustment, provided that the foregoing shall not restrict the right of the
Company to change its accounting principles consistent with GAAP, if the Board
of Directors determines that it is in the best interest of the Company to do so;
and

                           (f) such other information relating to the financial
condition, business, prospects or corporate affairs of the Company as the
Investor or any assignee of the Investor may from time to time reasonably
request, provided, however, that the Company shall not be obligated under this
subsection (f) or any other subsection of Section 2.1 to provide information
which it deems in good faith to be a trade secret or similar confidential
information.

                  2.2      INSPECTION. The Company shall permit each Investor,
at such Investor's expense, to visit and inspect the Company's properties, to
examine its books of account and records and to discuss the Company's affairs,
finances and accounts with its officers, all at such reasonable times as may be
requested by the Investor; provided, however, that the Company shall not be
obligated pursuant to this Section 2.2 to provide access to any information
which it reasonably considers to be a trade secret or similar confidential
information.

                  2.3      TERMINATION OF INFORMATION AND INSPECTION COVENANTS.
The covenants set forth in Sections 2.1 and 2.2 shall terminate as to Investors
and be of no further force or effect when the sale of securities pursuant to a
registration statement filed by the Company under the Act in connection with the
firm commitment underwritten offering of its securities to the general public is
consummated or when the Company first becomes subject to the periodic reporting
requirements of Sections 13 or 15(d) of the Exchange Act, whichever event shall
first occur.

                                      -11-
<PAGE>   13

         3.       MISCELLANEOUS.

                  3.1      SUCCESSORS AND ASSIGNS. Except as otherwise provided
herein, the terms and conditions of this Agreement shall inure to the benefit of
and be binding upon the respective successors and assigns of the parties
(including transferees of any of the Series A Preferred Stock or any Common
Stock issued upon conversion thereof). Nothing in this Agreement, express or
implied, is intended to confer upon any party other than the parties hereto or
their respective successors and assigns any rights, remedies, obligations, or
liabilities under or by reason of this Agreement, except as expressly provided
in this Agreement.

                  3.2      GOVERNING LAW. This Agreement and all acts and
transactions pursuant hereto shall be governed, construed and interpreted in
accordance with the laws of the State of Colorado without giving effect to
principles of conflicts of laws.

                  3.3      COUNTERPARTS. This Agreement may be executed in two
or more counterparts, each of which shall be deemed an original, but all of
which together shall constitute one and the same instrument.

                  3.4      TITLES AND SUBTITLES. The titles and subtitles used
in this Agreement are used for convenience only and are not to be considered in
construing or interpreting this Agreement.

                  3.5      NOTICES. Unless otherwise provided, any notice
required or permitted by this Agreement shall be in writing and shall be deemed
sufficient upon delivery, when delivered personally or by overnight courier or
sent by telegram or fax, or forty-eight (48) hours after being deposited in the
U.S. mail, as certified or registered mail, with postage prepaid, and addressed
to the party to be notified at such party's address as set forth below or on
Exhibit A hereto or as subsequently modified by written notice.

                  3.6      EXPENSES. If any action at law or in equity is
necessary to enforce or interpret the terms of this Agreement, the prevailing
party shall be entitled to reasonable attorneys' fees, costs and necessary
disbursements in addition to any other relief to which such party may be
entitled.

                  3.7      AMENDMENTS AND WAIVERS. Any term of this Agreement
may be amended and the observance of any term of this Agreement may be waived
(either generally or in a particular instance and either retroactively or
prospectively), only with the written consent of the Company and the holders of
a majority of the Registrable Securities then outstanding, not including the
Founders' Stock; provided that if such amendment has the effect of affecting the
Founders' Stock (i) in a manner different than securities issued to the
Investors and (ii) in a manner adverse to the interests of the holders of the
Founders' Stock, then such amendment shall require the consent of the holder or
holders of a majority of the Founders' Stock. Any amendment or waiver effected
in

                                      -12-
<PAGE>   14

accordance with this paragraph shall be binding upon each holder of any
Registrable Securities then outstanding, each future holder of all such
Registrable Securities, and the Company.

                  3.8      SEVERABILITY. If one or more provisions of this
Agreement are held to be unenforceable under applicable law, the parties agree
to renegotiate such provision in good faith. In the event that the parties
cannot reach a mutually agreeable and enforceable replacement for such
provision, then (x) such provision shall be excluded from this Agreement, (y)
the balance of the Agreement shall be interpreted as if such provision were so
excluded and (z) the balance of the Agreement shall be enforceable in accordance
with its terms.

                  3.9      AGGREGATION OF STOCK. All shares of the Preferred
Stock held or acquired by affiliated entities or persons shall be aggregated
together for the purpose of determining the availability of any rights under
this Agreement.

                            [Signature Page Follows]

                                      -13-
<PAGE>   15

         The parties have executed this Investors' Rights Agreement as of the
date first above written.

                                COMPANY:

                                SIGNALSOFT CORP.

                                By: /s/ David Hose
                                    --------------------------------------------
                                President

                                INVESTORS:

                                OLYMPIC VENTURE PARTNERS III, L.P.

                                By: OVMC III LP ITS GP

                                By: /s/ Charles P. Waite, Jr.,
                                    --------------------------------------------
                                Title: General Partner

                                OVP ENTREPRENEURS FUND, L.P.

                                By: OVMC III LP ITS GP

                                By:  /s/ Charles P. Waite, Jr.,
                                    --------------------------------------------
                                Title:  General Partner

                                FOUNDERS:

                                /s/ David Hose

                                /s/ Mark Flolid

                                /s/ Jim Fitch

                                      -14-<PAGE>   1
                                                                    EXHIBIT 10.4

               AMENDMENT ONE TO 8/1/96 INVESTORS' RIGHTS AGREEMENT
                                       OF
                                SIGNALSOFT CORP.

         THIS AMENDMENT, is entered into as of this 22nd day of January, 1998,
by and among SignalSoft Corp., a Colorado corporation (the"Company"), the
undersigned investors who comprise all of the holders of the Company's Series A
Preferred Stock (the "Series A Investors"), the Company's three founders --
David Hose, Mark Flolid, and Jim Fitch (individually a "Founder" and
collectively the "Founders") -- and the investors listed on Exhibit A hereto as
that Exhibit A now exists and may hereafter be added to in accordance with the
provisions of paragraph 1.2(c) of that certain SignalSoft Corp. Series B
Preferred Stock Purchase Agreement of even date herewith (the "Series B Purchase
Agreement") by and among the Company and the investors listed on Exhibit A
hereto and thereto (the "Series B Investors").

                                    RECITALS

                  WHEREAS, The Company, the Series A Investors, and the Founders
are signatories to that certain SignalSoft Corp. Investors' Rights Agreement
entered into as of the 1st day of August, 1996 (the "8/1/96 Investors' Rights
Agreement"); and,

                  WHEREAS, paragraph 3.7 of the 8/1/96 Investors' Rights
Agreement provides that such agreement may be amended only with the written
consent of the Company and the holders of a majority of the Registrable
Securities then outstanding, not including the Founders' Stock, as those terms
are defined therein (provided that the consent of the holder or holders of a
majority of the Founders' Stock is also required in certain circumstances), and
that any amendment so effected shall be binding upon each holder of any
Registrable Securities then outstanding, each future holder of all such
Registrable Securities, and the Company; and,

                  WHEREAS, the Series A Investors are - and have been
continuously since August 7, 1996 through and including the date hereof first
above written - the holders of a majority of the currently outstanding
Registrable Securities, not including the Founders' Stock as defined in the
8/20/86 Registration Rights Agreement; and both the Series A Investors and the
Company, as well as each of the Founders, desire to amend the 8/1/96 Investors'
Rights Agreement in the manner set forth in this Amendment in order to induce
the Series B Investors to purchase shares of the Company's Series B Preferred
Stock pursuant to the Series B Purchase Agreement by agreeing to the terms and
conditions in this Amendment; and,

                  WHEREAS, it is the intent of the parties hereto by this
Amendment to extend to all the holders of the Company's Series B Preferred Stock
the identical rights, privileges and obligations granted to, and assumed by, the
Series A Investors under the terms and conditions of the 8/1/96 Investors'
Rights Agreement.

<PAGE>   2

         NOW THEREFORE, in consideration of the above recitals and the mutual
promises contained below, the parties hereby agree as follows:

         1. Paragraph 1.1 of the 8/1/96 Investors' Rights Agreement is amended
by deleting the words "Section 1" in the heading and replacing them with the
word "Agreement", so that the heading of paragraph 1.1 as amended will
henceforth read in its entirety as follows:

         "1.1 Definitions. For purposes of this Agreement:"

         2. Paragraph 1.1(b) of the 8/1/96 Investors' Rights Agreement is
amended by inserting the words "and Series B" between the words "Series A" and
"Preferred Stock" in subparagraph 1.1(b)(i), so that subparagraph 1.1(b)(i) as
amended will henceforth read in its entirety as follows:

         "(b) The term "Registrable Securities" means (i) the shares of Common
         Stock issuable or issued upon conversion of the Series A and Series B
         Preferred Stock (such shares of Common Stock are collectively referred
         to hereinafter as the "Stock"),"

         3. A new paragraph 1.1(g) is hereby added to the 8/1/96 Investors'
Rights Agreement by this Amendment, to read in its entirety as follows:

         "(g) The term "Investor" means and shall include each holder of Series
         A Preferred Stock and/or Series B Preferred Stock of the Company."

         4. A new paragraph 1.1(h) is hereby added to the 8/1/96 Investors'
Rights Agreement by this Amendment), to read in its entirety as follows:

         "(h) The term "Preferred Stock" means and shall include both the
         Company's Series A Preferred Stock and Series B Preferred Stock
         aggregated together."

         5. A new paragraph 1.1(i) is hereby added to the 8/1/96 Investors'
Rights Agreement by this Amendment, to read in its entirety as follows:

         "(i) The term "Amended Investors' Rights Agreement" shall mean, and be
         used to describe, this Agreement taken together with all amendments
         hereto effected subsequent to 8/1/96 in conformity with the provisions
         of paragraph 3.7 hereof."

         6. The first sentence of paragraph 3.1 of the 8/1/96 Investors' Rights
Agreement is amended by inserting the words "and/or Series B" between the words
"Series A" and "Preferred Stock" within the parenthetical, so that the first
sentence of paragraph 3.1 as amended will henceforth read in its entirety as
follows:

         "3.1 Successors and Assigns. Except as otherwise provided herein, the
         terms and conditions of this Agreement shall inure to the benefit of
         and be binding upon the respective successors

                                       2
<PAGE>   3

         and assigns of the parties (including transferees of any of the Series
         A and/or Series B Preferred Stock or any Common Stock issued upon
         conversion thereof)."

         7. Paragraph 3 of the 8/1/96 Investors' Rights Agreement is amended by
the addition of a new paragraph 3.10 to read in its entirety as follows:

                  "3.10 Legend on Stock Certificates. Each certificate
         representing shares of capital stock that are subject to this Agreement
         shall bear a legend substantially in the following form:

                  "THE SALE, TRANSFER, ASSIGNMENT, PLEDGE, OR ENCUMBRANCE OF THE
                  SECURITIES REPRESENTED BY THIS CERTIFICATE ARE SUBJECT TO AN
                  INVESTORS' RIGHTS AGREEMENT DATED AUGUST 1, 1996, AS AMENDED
                  ON JANUARY 22, 1998, BY AND AMONG SIGNALSOFT CORP. AND CERTAIN
                  HOLDERS OF ITS OUTSTANDING CAPITAL STOCK. COPIES OF SUCH
                  AGREEMENT MAY BE OBTAINED AT NO COST BY WRITTEN REQUEST MADE
                  BY THE HOLDER OF RECORD OF THIS CERTIFICATE TO THE SECRETARY
                  OF SIGNALSOFT CORP."

         8. This Amendment shall be deemed effective as of January 22, 1998, the
date of the SignalSoft Corp. Series B Purchase Agreement, and specifically
hereby is intended to ratify, confirm and embody certain terms of the offer made
to the Series B Investors in the Term Sheet prior to their becoming a signatory
to the Series B Purchase Agreement and this Amendment, such that the Series B
Investors will become beneficiaries of the Amended Investors' Rights Agreement
as defined above as soon as they purchase shares of the Company's Series B
Preferred Stock pursuant to the Series B Purchase Agreement.

                            [Signature Pages Follow]

                                        3
<PAGE>   4

         The parties have executed this Amendment One to 8/1/96 Investors'
Rights Agreement as of the date first written above.

COMPANY:

SIGNALSOFT CORP.

By: /s/ David Hose
   -------------------------------
Name:   David Hose
     -----------------------------
               (print)

Title:   President
      ----------------------------

Address: 2045 Broadway
        --------------------------
         Boulder, CO 80302
        --------------------------

SERIES A INVESTORS:

OLYMPIC VENTURE PARTNERS III, L.P.
By: Olympic Venture Partners III, L.P. Its G.P.

By: /s/ Charles P. Waite, Jr.
   -------------------------------
Name:   Charles P. Waite, Jr.
     -----------------------------
               (print)

Title:  General Partner
      ----------------------------

Address:
        --------------------------

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

                                        4
<PAGE>   5

OVP III ENTREPRENEURS FUND, L.P.
By: OVMC III, L.P., Its G.P.

By: /s/ Charles P. Waite, Jr.
   -------------------------------
Name:   Charles P. Waite, Jr.
     -----------------------------
               (print)

Title:  General Partner
      ----------------------------

Address:
        --------------------------

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

FOUNDERS:

    /s/ David Hose

    /s/ Mark Flolid

    /s/ Jim Fitch

SERIES B INVESTORS:

OLYMPIC VENTURE PARTNERS III, L.P.
By: OVMC III, L.P., Its G.P.

By: /s/ Charles P. Waite, Jr.
   -------------------------------
Name:   Charles P. Waite, Jr.
     -----------------------------
               (print)
Title:  General Partner
      ----------------------------

                                        5
<PAGE>   6

OVP III ENTREPRENEURS FUND, L.P.
By: OVMC III, L.P., Its G.P.

By: /s/ Charles P. Waite, Jr.
   -------------------------------
Name:   Charles P. Waite, Jr.
     -----------------------------
               (print)
Title:  General Partner
      ----------------------------

OLYMPIC VENTURE PARTNERS IV, L.P.

By: OVMC IV, L.L.C., Its G.P.

By: /s/ Charles P. Waite, Jr.
   -------------------------------
Name:   Charles P. Waite, Jr.
     -----------------------------
               (print)
Title:  Managing Member
      ----------------------------

OVP IV ENTREPRENEURS FUND, L.P.
By: OVMC IV, L.L.C., Its G.P.

By: /s/ Charles P. Waite, Jr.
   -------------------------------
Name:   Charles P. Waite, Jr.
     -----------------------------
               (print)
Title:  Managing Member
      ----------------------------

/s/ Peter J. Mooney
----------------------------------
Peter J. Mooney as nominee
 for the Broadview Partners Group

/s/ Michael Berman

                                        6
<PAGE>   7

WESSELS, ARNOLD & HENDERSON, L.L.C.

By: /s/ Thomas J. Brigl
   -------------------------------

Print Name: Thomas J. Brigl
           -----------------------
Print Title: CFO/Managing Director
            ----------------------

/s/ Robert P. Mitchell
----------------------------------

Lazard Freres & Co. LLC

/s/ Russell P. Planitzer

TGI Fund II, LC
By Tredegar Investments Inc., its Manager

By: /s/ L. U. A. Blanchard

                                        7

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