Document:

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                                                                  EXHIBIT 10.15

                            INDEMNIFICATION AGREEMENT

                  AGREEMENT made this ___ day of __________, ____, between
eLoyalty Corporation, a Delaware corporation (the "Company"), and
_______________ (the "Indemnitee").

                  WHEREAS, it is essential to the Company and its stockholders
to attract and retain qualified and capable directors, officers, employees,
agents and fiduciaries;

                  WHEREAS, the Certificate of Incorporation of the Company (the
"Certificate of Incorporation") requires the Company to indemnify and advance
expenses to its directors and officers to the extent not prohibited by law;

                  WHEREAS, historically, basic protection against undue risk of
personal liability of directors and officers has been provided through insurance
coverage affording reasonable protection at reasonable cost;

                  WHEREAS, it is presently uncertain whether, and to what
extent, such insurance is or will continue to be available to the Company at a
reasonable cost for the protection of Indemnitee;

                  WHEREAS, in recognition of Indemnitee's need for protection
against personal liability in order to induce Indemnitee to serve or continue to
serve the Company in an effective manner, and, in the case of directors and
officers, to supplement or replace the Company's directors' and officers'
liability insurance coverage, and in part to provide Indemnitee with specific
contractual assurance that the protection promised by the Certificate of
Incorporation will be available to Indemnitee (regardless of, among other
things, any amendment to or revocation of the Certificate of Incorporation or
any change in the composition of the Company's Board of Directors or any
acquisition transaction relating to the Company), the Company wishes to provide
the Indemnitee with the benefits contemplated by this Agreement; and

                  WHEREAS, as a result of the provision of such benefits
Indemnitee has agreed to serve or to continue to serve the
Company;

                  NOW, THEREFORE, the parties hereto hereby agree as follows:

                  1. Definitions. The following terms, as used herein, shall
have the following respective meanings:

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                  (a) Claim: means any threatened, pending or completed action,
suit, arbitration or proceeding, or any inquiry or investigation, whether
brought by or in the right of the Company or otherwise, that Indemnitee in good
faith believes might lead to the institution of any such action, suit,
arbitration or proceeding, whether civil, criminal, administrative,
investigative or other, or any appeal therefrom.

                  (b) D&O Insurance: means any valid directors' and officers'
liability insurance policy maintained by the Company for the benefit of the
Indemnitee, if any.

                  (c) Determination: means a determination, and Determined means
a matter which has been determined based on the facts known at the time, by: (i)
a majority vote of a quorum of disinterested directors, or (ii) if such a quorum
is not obtainable, or even if obtainable, if a quorum of disinterested directors
so directs, by independent legal counsel in a written opinion, or (iii) a
majority of the disinterested stockholders of the Company, or (iv) a final
adjudication by a court of competent jurisdiction.

                  (d) Excluded Claim: means any payment for Losses or Expenses
in connection with any Claim: (i) based upon or attributable to Indemnitee
gaining in fact any personal profit or advantage to which Indemnitee is not
entitled; or (ii) for the return by Indemnitee of any remuneration paid to
Indemnitee without the previous approval of the stockholders of the Company
which is illegal; or (iii) for an accounting of profits in fact made from the
purchase or sale by Indemnitee of securities of the Company within the meaning
of Section 16 of the Securities Exchange Act of 1934, as amended, or similar
provisions of any state law; or (iv) resulting from Indemnitee's knowingly
fraudulent, dishonest or willful misconduct; or (v) the payment of which by the
Company under this Agreement is not permitted by applicable law.

                  (e) Expenses: means any reasonable expenses incurred by
Indemnitee as a result of a Claim or Claims made against Indemnitee for
Indemnifiable Events including, without limitation, attorneys' fees and all
other costs, expenses and obligations paid or incurred in connection with
investigating, defending, being a witness in or participating in (including on
appeal), or preparing to defend, be a witness in or participate in any Claim
relating to any Indemnifiable Event.

                  (f) Fines: means any fine, penalty or, with respect to an
employee benefit plan, any excise tax or penalty assessed with respect thereto.

                  (g) Indemnifiable Event: means any event or occurrence,
occurring prior to or after the date of this

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Agreement, related to the fact that Indemnitee is, was or has agreed to serve
as, a director or officer of the Company, or is or was serving at the request of
the Company as a director, officer, employee or agent of another corporation,
partnership, joint venture, employee benefit plan, trust or other enterprise;
provided that the Indemnitee acted in good faith and in a manner the Indemnitee
reasonably believed to be in or not opposed to the best interests of the
Company, and, with respect to any criminal action or proceeding, the Indemnitee
had no reasonable cause to believe his conduct was unlawful.

                  (h) Losses: means any amounts or sums which Indemnitee is
legally obligated to pay as a result of a Claim or Claims made against
Indemnitee for Indemnifiable Events including, without limitation, damages,
judgments and sums or amounts paid in settlement of a Claim or Claims, and
Fines.

                  2. Basic Indemnification Agreement. In consideration of, and
as an inducement to, the Indemnitee rendering valuable services to the Company,
the Company agrees that in the event Indemnitee is or becomes a party to or
witness or other participant in, or is threatened to be made a party to or
witness or other participant in, a Claim by reason of (or arising in part out
of) an Indemnifiable Event, the Company will indemnify Indemnitee to the fullest
extent authorized by law, against any and all Losses and Expenses (including all
interest, assessments and other charges paid or payable in connection with or in
respect of such Losses and Expenses) of such Claim, whether or not such Claim
proceeds to judgment or is settled or otherwise is brought to a final
disposition, subject in each case, to the further provisions of this Agreement.

                  3. Limitations on Indemnification. Notwithstanding the
provisions of Section 2, Indemnitee shall not be indemnified and held harmless
from any Losses or Expenses (a) which have been Determined, as provided herein,
to constitute an Excluded Claim; (b) to the extent Indemnitee is indemnified by
the Company and has actually received payment pursuant to the Certificate of
Incorporation, D&O Insurance or otherwise; or (c) other than pursuant to the
last sentence of Section 4(d) or Section 12, in connection with any claim
initiated by Indemnitee, unless the Board of Directors has authorized such
claim.

                  4. Indemnification Procedures.

                  (a) Promptly after receipt by Indemnitee of notice of any
Claim, Indemnitee shall, if indemnification with respect thereto may be sought
from the Company under this Agreement, notify the Company of the commencement
thereof; provided, however, that the failure to give such notice promptly shall
not affect or limit the Company's obligations with respect to the matters
described in the notice of such Claim, except to the

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extent that the Company is prejudiced thereby. Indemnitee agrees further not to
make any admission or effect any settlement with respect to such Claim without
the consent of the Company, except any Claim with respect to which the
Indemnitee has undertaken the defense in accordance with the second to last
sentence of Section 4(d).

                  (b) If, at the time of the receipt of such notice, the Company
has D&O Insurance in effect, the Company shall give prompt notice of the
commencement of Claim to the insurers in accordance with the procedures set
forth in the respective policies. The Company shall thereafter take all
necessary or desirable action to cause such insurers to pay, on behalf of
Indemnitee, all Losses and Expenses payable as a result of such Claim.

                  (c) To the extent the Company does not, at the time of the
Claim have applicable D&O Insurance, or if a Determination is made that any
Expenses arising out of such Claim will not be payable under the D&O Insurance
then in effect, the Company shall be obligated to pay the Expenses of any Claim
in advance of the final disposition thereof and the Company, if appropriate,
shall be entitled to assume the defense of such Claim, with counsel satisfactory
to Indemnitee, upon the delivery to Indemnitee of written notice of its election
so to do. After delivery of such notice, the Company will not be liable to
Indemnitee under this Agreement for any legal or other Expenses subsequently
incurred by Indemnitee in connection with such defense other than reasonable
Expenses of investigation; provided that Indemnitee shall have the right to
employ its counsel in such Claim but the fees and expenses of such counsel
incurred after delivery of notice from the Company of its assumption of such
defense shall be at the Indemnitee's expense; provided further that if: (i) the
employment of counsel by Indemnitee has been previously authorized by the
Company, (ii) Indemnitee shall have reasonably concluded that there may be a
conflict of interest between the Company and Indemnitee in the conduct of any
such defense, or (iii) the Company shall not, in fact, have employed counsel to
assume the defense of such action, the reasonable fees and expenses of counsel
shall be at the expense of the Company.

                  (d) All payments on account of the Company's indemnification
obligations under this Agreement shall be made within sixty (60) days of
Indemnitee's written request therefor unless a Determination is made that the
Claims giving rise to Indemnitee's request are Excluded Claims or otherwise not
payable under this Agreement, provided that all payments on account of the
Company's obligation to pay Expenses under Section 4(c) of this Agreement prior
to the final disposition of any Claim shall be made within 20 days of
Indemnitee's written request therefor and such obligation shall not be subject
to any such Determination but shall be subject to Section 4(e) of this

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Agreement. In the event the Company takes the position that Indemnitee is not
entitled to indemnification in connection with the proposed settlement of any
Claim, Indemnitee shall have the right at his own expense to undertake defense
of any such Claim, insofar as such proceeding involves Claims against the
Indemnitee, by written notice given to the Company within 10 days after the
Company has notified Indemnitee in writing of its contention that Indemnitee is
not entitled to indemnification; provided, however, that the failure to give
such notice within such 10-day period shall not affect or limit the Company's
obligations with respect to any such Claim if such Claim is subsequently
determined not to be an Excluded Claim or otherwise to be payable under this
Agreement, except to the extent that the Company is prejudiced thereby. If it is
subsequently determined in connection with such proceeding that the
Indemnifiable Events are not Excluded Claims and that Indemnitee, therefor, is
entitled to be indemnified under the provisions of Section 2 hereof, the Company
shall promptly indemnify Indemnitee.

                  (e) Indemnitee hereby expressly undertakes and agrees to
reimburse the Company for all Losses and Expenses paid by the Company in
connection with any Claim against Indemnitee in the event and only to the extent
that a Determination shall have been made by a court of competent jurisdiction
in a decision from which there is no further right to appeal that Indemnitee is
not entitled to be indemnified by the Company for such Losses and Expenses
because the Claim is an Excluded Claim or because Indemnitee is otherwise not
entitled to payment under this Agreement.

                  (f) In connection with any Determination as to whether
Indemnitee is entitled to be indemnified hereunder the burden of proof shall be
on the Company to establish that Indemnitee is not so entitled.

                  5. Settlement. The Company shall have no obligation to
indemnify Indemnitee under this Agreement for any amounts paid in settlement of
any Claim effected without the Company's prior written consent. The Company
shall not settle any Claim in which it takes the position that Indemnitee is not
entitled to indemnification in connection with such settlement without the
consent of Indemnitee, nor shall the Company settle any Claim in any manner
which would impose any Fine or any obligation on Indemnitee, without
Indemnitee's written consent. Neither the Company nor Indemnitee shall
unreasonably withhold its or his consent to any proposed settlement.

                  6. No Presumption. For purposes of this Agreement, the
termination of any Claim by judgment, order, settlement (whether with or without
court approval) or conviction, or upon a plea of nolo contendere, or its
equivalent, shall not, of itself, create a presumption that Indemnitee did not
meet any particular

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standard of conduct or have any particular belief or that a court has determined
that indemnification is not permitted by applicable law.

                  7. Non-exclusivity, Etc. The rights of Indemnitee hereunder
shall be in addition to any other rights Indemnitee may have under the
Certificate of Incorporation, the Company's By- laws, the Delaware General
Corporation Law, any vote of stockholders or disinterested directors or
otherwise, both as to action in Indemnitee's official capacity and as to action
in any other capacity by holding such office, and shall continue after
Indemnitee ceases to serve the Company as a director or officer for so long as
Indemnitee shall be subject to any Claim by reason of (or arising in part out
of) an Indemnifiable Event. To the extent that a change in the Delaware General
Corporation Law (whether by statute or judicial decision) permits greater
indemnification by agreement than would be afforded currently under the
Certificate of Incorporation and this Agreement, it is the intent of the parties
hereto that Indemnitee shall enjoy by this Agreement the greater benefits so
afforded by such change.

                  8. Liability Insurance. To the extent the Company maintains an
insurance policy or policies providing directors' and officers' liability
insurance, Indemnitee, if an officer or director of the Company, shall be
covered by such policy or policies, in accordance with its or their terms, to
the maximum extent of the coverage available for any director or officer of the
Company.

                  9. Subrogation. In the event of payment under this Agreement,
the Company shall be subrogated to the extent of such payment to all of the
rights of recovery of Indemnitee, who shall execute all papers required and
shall do everything that may be necessary to secure such rights, including the
execution of such documents necessary to enable the Company effectively to bring
suit to enforce such rights.

                  10. Partial Indemnity, Etc. If Indemnitee is entitled under
any provision of this Agreement to indemnification by the Company for some or a
portion of the Losses and Expenses of a Claim but not, however, for all of the
total amount thereof, the Company shall nevertheless indemnify Indemnitee for
the portion thereof to which Indemnitee is entitled. Moreover, notwithstanding
any other provision of this Agreement, to the extent that Indemnitee has been
successful on the merits or otherwise in defense of any or all Claims relating
in whole or in part to any Indemnifiable Event or in defense of any issue or
matter therein, including dismissal without prejudice, Indemnitee shall be
indemnified against all Expenses incurred in connection therewith.

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                  11. Liability of Company. Indemnitee agrees that neither the
stockholders nor the directors nor any officer, employee, representative or
agent of the Company shall be personally liable for the satisfaction of the
Company's obligations under this Agreement and Indemnitee shall look solely to
the assets of the Company for satisfaction of any claims hereunder.

                  12. Enforcement.

                  (a) Indemnitee's right to indemnification and other rights
under this Agreement shall be specifically enforceable by Indemnitee only in the
state or Federal courts of the States of Delaware or Illinois and shall be
enforceable notwithstanding any adverse Determination by the Company's Board of
Directors, independent legal counsel or the Company's stockholders and no such
Determination shall create a presumption that Indemnitee is not entitled to be
indemnified hereunder. In any such action the Company shall have the burden of
proving that indemnification is not required under this Agreement.

                  (b) In the event that any action is instituted by Indemnitee
under this Agreement, or to enforce or interpret any of the terms of this
Agreement, Indemnitee shall be entitled to be paid all court costs and
reasonable expenses, including reasonable counsel fees, incurred by Indemnitee
with respect to such action, unless the court determines that each of the
material assertions made by Indemnitee as a basis for such action was not made
in good faith or was frivolous.

                  13. Severability. In the event that any provision of this
Agreement is determined by a court to require the Company to do or to fail to do
an act which is in violation of applicable law, such provision (including any
provision within a single section, paragraph or sentence) shall be limited or
modified in its application to the minimum extent necessary to avoid a violation
of law, and, as so limited or modified, such provision and the balance of this
Agreement shall be enforceable in accordance with their terms to the fullest
extent permitted by law.

                  14. Governing Law. This Agreement shall be governed by and
construed in accordance with the laws of the State of Delaware applicable to
agreements made and to be performed entirely within such State.

                  15. Consent to Jurisdiction. The Company and Indemnitee each
hereby irrevocably consents to the jurisdiction of the courts of the States of
Delaware and Illinois for all purposes in connection with any action

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or proceeding which arises out of or relates to this Agreement and agrees that
any action instituted under this Agreement shall be brought only in the state
and Federal courts of the States of Delaware and Illinois.

                  16. Notices. All notices or other communications required or
permitted hereunder shall be sufficiently given for all purposes if in writing
and personally delivered, telegraphed, telexed, sent by facsimile transmission
or sent by registered or certified mail, return receipt requested, with postage
prepaid addressed as follows, or to such other address as the parties shall have
given notice of pursuant hereto:

                  (a)      If to the Company, to:
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                           ------------------------------

                  (b)      If to Indemnitee, to:
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                           ------------------------------
                           ------------------------------
                           ------------------------------

                  17. Counterparts. This Agreement may be signed in
counterparts, each of which shall be an original and all of which, when taken
together, shall constitute one and the same instrument.

                  18. Successors and Assigns. This Agreement shall be (i)
binding upon all successors and assigns of the Company, including any direct or
indirect successor by purchase, merger, consolidation or otherwise to all or
substantially all of the business and/or assets of the Company, and (ii) binding
upon and inure to the benefit of any successors and assigns, heirs, and personal
or legal representatives of Indemnitee.

                  19. Amendment; Waiver. No amendment, modification, termination
or cancellation of this Agreement shall be effective unless made in a writing
signed by each of the parties hereto. No waiver of any of the provisions of this
Agreement shall be deemed or shall constitute a waiver of any other provision
hereof (whether or not similar) nor shall such waiver constitute a continuing
waiver.

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                  IN WITNESS WHEREOF, the Company and Indemnitee have executed
this Agreement as of the day and year first above written.

                                            By:
                                               --------------------------------

ATTEST:

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

                                                 ------------------------------
                                                 (Indemnitee)

WITNESS:

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

                                      -9-<PAGE>   1
                                                                     EXHIBIT 4.2
                                     FORM OF

                                WARRANT AGREEMENT

                                   Dated as of

                               -----------, -----

                                     between

                                 METRICOM, INC.

                                       and

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

                                as Warrant Agent

                                  Warrants for
                                 Common Stock of
                                 METRICOM, INC.

<PAGE>   2

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                              Page
                                                                              ----
<S>                                                                           <C>

                                    ARTICLE 1
                                   Definitions

SECTION 1.1. Definitions                                                         1
SECTION 1.2. Other Definitions                                                  15

                                    ARTICLE 2
                              Warrant Certificates

SECTION 2.1. Form and Dating                                                     6
SECTION 2.2. Legends                                                             8
SECTION 2.3. Execution and Countersignature                                     15
SECTION 2.4. Certificate Register                                               16
SECTION 2.5. Separation of Warrants and Notes                                   16
SECTION 2.6. Transfer and Exchange                                              16
SECTION 2.7. Replacement Certificates                                           18
SECTION 2.8. Temporary Certificates                                             18
SECTION 2.9. Cancellation                                                       18

                                    ARTICLE 3
                                 Exercise Terms

SECTION 3.1. Exercise Price                                                     19
SECTION 3.2. Exercise Periods; Restrictions on Exercise                         19
SECTION 3.3. Expiration                                                         19
SECTION 3.4. Manner of Exercise                                                 20
SECTION 3.5. Issuance of Warrant Shares                                         20
SECTION 3.6. Fractional Warrant Shares                                          21
SECTION 3.7. Reservation of Warrant Shares                                      21
SECTION 3.8. Compliance with Law                                                22

                                    ARTICLE 4
                             Antidilution Provisions

SECTION 4.1. Changes in Common Stock                                            22
SECTION 4.2. Cash Dividends and Other Distributions                             23
SECTION 4.3. Rights Issue to All Holders of Common Stock                        23
SECTION 4.4. Other Issuances of Common Stock or Rights                          24
SECTION 4.5. Combination; Liquidation                                           25
SECTION 4.6. Other Events                                                       26
</TABLE>

                                       2
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<TABLE>
<S>                                                                             <C>
SECTION 4.7. Superseding Adjustment                                             26
SECTION 4.8. Minimum Adjustment                                                 27
SECTION 4.9. Notice of Adjustment                                               27
SECTION 4.10. Notice of Certain Transactions                                    28
SECTION 4.11. Adjustment to Warrant Certificate                                 28
SECTION 4.12. Exceptions to Antidilution Provisions                             29

                                    ARTICLE 5
                                  Warrant Agent

SECTION 5.1. Appointment of Warrant Agent                                       39
SECTION 5.2. Right and Duties of Warrant Agent                                  40
SECTION 5.3. Individual Rights of Warrant Agent                                 41
SECTION 5.4. Warrant Agent's Disclaimer                                         41
SECTION 5.5. Compensation and Indemnity                                         41
SECTION 5.6. Successor Warrant Agent                                            41

                                    ARTICLE 6
                                  Miscellaneous

SECTION 6.1. Financial Statements and Reports of the Company                    44
SECTION 6.2. Third Party Beneficiaries                                          44
SECTION 6.3. Rights of Holders                                                  44
SECTION 6.4. Amendment                                                          44
SECTION 6.5. Notices                                                            45
SECTION 6.6. Governing Law                                                      46
SECTION 6.7. Successors                                                         46
SECTION 6.8. Multiple Originals                                                 46
SECTION 6.9. Table of Contents                                                  46
SECTION 6.10. Severability                                                      46
</TABLE>

EXHIBIT A      Form of Face of Warrant Certificate

APPENDIX A     List of Financial Experts

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<PAGE>   4

                WARRANT AGREEMENT dated as of _________, _____ (this
"Agreement"), between METRICOM, INC., a Delaware corporation (the "Company"),
and _____________________, as Warrant Agent (the "Warrant Agent").

                The Company desires to issue the warrants (the "Warrants" and
each a "Warrant") described herein which will initially entitle the holders
thereof (the "Holders") to purchase an aggregate of ___________ shares of common
stock, par value $0.01 per share (the "Common Stock"), of the Company at a
purchase price of $_______ per share subject to the adjustments described
herein, in connection with an offering of (i) $__________ aggregate principal
amount of ________________ (collectively, the "Notes" and each $1,000 principal
amount thereof a "Note") issued by the Company and Metricom Finance, Inc., a
Delaware corporation and wholly owned subsidiary of the Company ("Finance Sub"
and together with the Company, the "Issuers"), pursuant to the provisions of the
Indenture (as defined below), and (ii) ___________ Warrants initially entitling
the Holder to purchase _________ shares of Common Stock, subject to adjustment
as provided herein. In connection with the sale of the Notes, each purchaser of
a Note is required to purchase a Warrant, resulting in an aggregate of _______
Warrants to be issued to the purchasers of the Notes.

                Each Note will be transferable only along with the corresponding
Warrant forming a unit and will not become separately transferable until the
earliest to occur of (i) ____________________, (ii) an Exercise Event or (iii)
such other date, as Lehman Brothers Inc. shall determine (the "Separation
Date").

                The Company further desires the Warrant Agent to act on behalf
of the Company in connection with the issuance of the Warrants as provided
herein and the Warrant Agent is willing to so act.

                Each party agrees as follows for the benefit of the other party
and for the equal and ratable benefit of the Holders of Warrants:

                                    ARTICLE 1
                                   Definitions

                Any capitalized terms not otherwise defined herein shall have
the meaning attributed such term in the Indenture.

                SECTION 1.1. Definitions.

                "Affiliate" means, as applied to any Person, any other Person
directly or indirectly controlling, controlled by, or under direct or indirect
common control with, such Person. For purposes of this definition, "control" and
correlative meanings, the terms "controlling," "controlled by" and "under common
control with," as applied to any Person, means the possession, directly or
indirectly, of the power to direct or cause the direction of the management

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<PAGE>   5

and policies of such Person, whether through the ownership of voting securities,
by contract or otherwise.

                "Board of Directors" means (1) in respect of a limited liability
company, the board of advisors of that company; (2) in respect of a corporation,
the board of directors of the corporation, or any authorized committee thereof;
and (3) in respect of any other Person, the board or committee of that Person
serving a similar function.

                "Business Day" means any day other than a Legal Holiday.

                "Capital Stock" means, with respect to any Person, any and all
shares, interests, participations or other equivalents, however designated,
whether voting or non-voting, in equity of such Person, whether now outstanding
or issued after the date hereof, including, without limitation, all Common Stock
and Preferred Stock.

                "Cashless Exercise Ratio" means a fraction, the numerator of
which is the excess of the Current Market Value per share of Common Stock on the
Exercise Date over the Exercise Price per share as of the Exercise Date and the
denominator of which is the Current Market Value per share of the Common Stock
on the Exercise Date.

                "Change of Control" means such time as (1) a "person" or
"group," within the meaning of Sections 13(d) and 14(d)(2) of the Exchange Act,
other than a Permitted Holder, becomes the ultimate "beneficial owner," as
defined in Rule 13d-3 under the Exchange Act, of more than 50% of the total
voting power of the then outstanding Voting Stock of either Issuer on a fully
diluted basis; (2) individuals who at the beginning of any period of two
consecutive calendar years constituted the Board of Directors of either Issuer,
together with any directors who are members of such Board of Directors on the
date hereof and any new directors whose election by the Board of Directors or
whose nomination for election by the stockholders of such Issuer was approved by
a vote of at least two-thirds of the members of the Board of Directors then
still in office who either were members of the Board of Directors at the
beginning of such period or whose election or nomination for election was
previously so approved, cease for any reason to constitute a majority of the
members of such Board of Directors then in office; (3) the sale, lease,
transfer, conveyance or other disposition, other than by way of merger or
consolidation, in one or a series of related transactions, of all or
substantially all of the assets of the Issuers and their Subsidiaries taken as a
whole to any such "person" or "group," other than to a Permitted Holder or a
Restricted Subsidiary of an Issuer; (4) the merger or consolidation of an Issuer
with or into another corporation or the merger of another corporation with or
into an Issuer with the effect that immediately after such transaction any such
"person" or "group" of persons or entities, other than a Permitted Holder, shall
have become the ultimate beneficial owner of securities of the surviving
corporation of such merger or consolidation representing more than 50% of the
total voting power of the then outstanding Voting Stock of the surviving
corporation; or (5) the approval by the holders of the Capital Stock of an
Issuer of a plan relating to the liquidation or dissolution of such

                                       5
<PAGE>   6

Issuer. In no event shall the consummation of a Holding Company Reorganization
constitute a Change of Control.

                "Combination" means an event (other than the Holding Company
Reorganization) in which the Company consolidates with, merges with or into, or
sells all or substantially all of its assets to another Person.

                "Current Market Value" per share of Common Stock or any other
security of the Company at any date means: (i) if the security is not of a class
registered under the Exchange Act, (a) the value of the security, determined in
good faith by the Board of Directors and certified in a resolution of the Board
of Directors, based on the most recently completed arm's-length transaction
between the Company and a Person other than an Affiliate of the Company, the
closing of which occurred on such date or within the six-month period preceding
such date, or (b) if no such transaction shall have occurred on such date or
within such six-month period, the value of the security as determined by an
independent Financial Expert; or (ii) if the security is of a class registered
under the Exchange Act, the average of the last reported sale price of the
Common Stock (or the equivalent in an over-the-counter market) for each Business
Day during the period commencing 15 Business Days before such date and ending on
the date one day prior to such date, or if the security of a class registered
under the Exchange Act for less than 15 consecutive Business Days before such
date, the average of the daily closing bid prices (or such equivalent) for all
of the Business Days before such date for which daily closing bid prices are
available (provided, however, that if the closing bid price is not determinable
for at least 10 Business Days in such period, then clause (i) above and not this
clause (ii) shall be used to determine Current Market Value; provided, however,
that if the Warrant Shares requested to be included in a Demand Registration
Statement shall be underlying an unexercised Warrant, then Current Market Value
shall be calculated as aforesaid, but shall have deducted therefrom the exercise
price of the related Warrant.

                "Exchange Act" means the Securities Exchange Act of 1934, as
amended.

                "Exercise Date" means, for a given Warrant, the day on which
such Warrant is exercised pursuant to Section 3.4.

                "Exercise Event" means, with respect to each Warrant as to which
such event is applicable, the earlier of: (i) a Change of Control and (ii) any
date when the Company (A) consolidates or merges into or with another Person
(but only where holders of Common Stock receive consideration in exchange for
all or part of such Common Stock other than common stock in the surviving
Person) if the Common Stock (or other securities) thereafter issuable upon
exercise of the Warrants will not be registered under the Exchange Act or (B)
sells all or substantially all of its assets to another Person if the Common
Stock (or other securities) thereafter issuable upon exercise of the Warrants
will not be registered under the Exchange Act; provided, that the events in (A)
and (B) will not be deemed to have occurred if the consideration for the Common
Stock in either such transaction consists solely of cash. Notwithstanding
anything herein to the contrary, the consummation of the Holding Company
Reorganization shall not constitute an Exercise Event.

                                       6
<PAGE>   7

                "Financial Expert" means one of the Persons listed in Appendix A
hereto.

                "Holding Company Reorganization" has the meaning set forth in
the Indenture.

                "Indenture" means the Senior Notes Indenture dated as of
December 28, 1999, between the Company and the Trustee, with respect to the
Notes, as supplemented by the First Supplemental Indenture dated as of February
__, 2000, and as it may be amended or supplemented from time to time.

                "Independent Financial Expert" means a Financial Expert that
does not, and whose directors, executive officers and 5% stockholders do not,
have a direct or indirect financial interest in the Company or any of its
subsidiaries or Affiliates, which has not been for at least five years and, at
the time it is called upon to give independent financial advice to the Company,
is not (and none of its directors, executive officers or 5% stockholders is) a
promoter, director, or officer of the Company or any of its subsidiaries or
Affiliates. The Independent Financial Expert may be compensated and indemnified
by the Company for opinions or services it provides as an Independent Financial
Expert.

                "Indirect Participant" means a Person who holds a beneficial
interest in a Global Note through a Participant.

                "Issue Date" means __________, ______.

                "Legal Holiday" means a Saturday, a Sunday or a day on which
banking institutions in the City of New York or at a place of payment are
authorized by law, regulation or executive order to remain closed. If a payment
date is a Legal Holiday at a place of payment, payment may be made at that place
on the next succeeding day that is not a Legal Holiday, and no interest shall
accrue on such payment for the intervening period.

                "Officer" means the Chairman of the Board of Directors, the
President, any Vice President, the Treasurer, or an Assistant Treasurer, or the
Secretary or an Assistant Secretary of the Company.

                "Participant" means, with respect to DTC or its nominee, an
institution that has an account therewith.

                "Permitted Holder" means either MCI Worldcom or Vulcan Ventures,
or any majority owned Affiliate thereof.

                "Preferred Stock" means, with respect to any Person, any and all
shares, interests, participations or other equivalents, however designated,
whether voting or non-voting, of that Person's equity that have a preference as
to the payment of dividends or as to payments upon a

                                       7
<PAGE>   8

liquidation of that Person, whether now outstanding or issued after the date
hereof, including without limitation, all series and classes of such equity.

                "Person" means any natural person, limited liability company,
corporation, partnership, government, agency or instrumentality of a government,
or any other entity.

                "Restricted Subsidiary" has the meaning set forth in the
Indenture.

                "Securities Act" means the Securities Act of 1933, as amended.

                "Trustee" means Banc One Trust Company, N.A., or any successor
trustee under the Indenture.

                "Voting Stock" of any Person as of any date means the Capital
Stock of that Person that is at the time entitled to vote in the election of
directors or similar individuals of that Person.

                "Warrant Certificates" mean the registered certificates
(including without limitation, the global certificates) issued by the Company
under this Agreement representing the Warrants.

                "Warrant Shares" mean the shares of Common Stock (and any other
securities) for which the Warrants are exercisable.

                SECTION 1.2. Other Definitions.

<TABLE>
<CAPTION>
                                                   Defined in
Term                                                Section
---------------------------------------------      ----------
<S>                                                <C>
"Agreement" .................................       Recitals
"Cashless Exercise" .........................            3.4
"Certificate Register" ......................            2.4
"Common Stock" ..............................       Recitals
["Communications Act" .......................        3.2(b)]
"Company" ...................................       Recitals
"Delivering Seller" .........................            5.7(a)
"DTC" or "Depository" .......................            2.2(b)
"Exercise Price" ............................            3.1
"Expiration Date" ...........................            3.2(c)
["FCC Rules" ................................        3.2(b)]
"Finance Sub" ...............................       Recitals
"Global Warrants" ...........................            2.1
"Holders" ...................................       Recitals
"Issuers" ...................................       Recitals
"Notes" .....................................       Recitals
</TABLE>

                                       8
<PAGE>   9

<TABLE>
<S>                                                 <C>
"Participants" ..............................            2.6(b)
"Reference Security" ........................           4.12(vi)
"Separability Legend" .......................            2.2(a)
"Separation Date" ...........................       Recitals
"Successor Company" .........................            4.5(a)
"Transfer Agent" ............................            3.5
"Warrant Agent" .............................       Recitals
"Warrant" and "Warrants" ....................       Recitals
</TABLE>

                All terms used herein with their initial letters capitalized and
not otherwise defined herein are used herein with the meaning given those terms
in the Indenture.

                SECTION 1.3. Rules of Construction. Unless the text otherwise
requires:

                                (i) a defined term has the meaning assigned to
                        it;

                                (ii) an accounting term not otherwise defined
                        has the meaning assigned to it in accordance with
                        generally accepted accounting principles as in effect
                        from time to time;

                                (iii) "or" is not exclusive;

                                (iv) "including" means including without
                        limitation; and

                                (v) words in the singular include the plural and
                        words in the plural include the singular.

                                    ARTICLE 2

                              Warrant Certificates

                SECTION 2.1. Form and Dating. Each Warrant Certificate shall be
issued in registered form only, substantially in the form of Exhibit A. The
Warrant Certificates may have notations, legends or endorsements required by
law, stock exchange rule, agreements to which the Company is subject, if any, or
usage (including CUSIP numbers) (provided that any such notation, legend or
endorsement is in a form acceptable to the Company) and shall bear the legends
required by Section 2.2. Each Warrant Certificate shall be dated the date of its
countersignature.

                The terms and provisions contained in the form of Warrant
annexed hereto as Exhibit A shall constitute, and are hereby expressly made, a
part of this Warrant Agreement. To the extent applicable, the Company and the
Warrant Agent, by their execution and delivery of this Warrant Agreement, agree
to such terms and provisions and to be bound thereby.

                                       9
<PAGE>   10

                Warrants offered and sold shall be issued initially in the form
of one or more permanent global Warrant Certificates in registered form,
substantially in the form set forth in Exhibit A (the "Global Warrants"),
registered in the name of the Depositary or the nominee of the Depositary,
deposited with the Warrant Agent, as custodian for the Depositary, duly executed
by the Company and countersigned by the Warrant Agent as hereinafter provided.
The aggregate number of Warrants represented by the Global Warrant may from time
to time be increased or decreased by adjustments made on the records of the
Warrant Agent, as custodian for the Depositary or its nominee, in accordance
with the instructions given by the Holder thereof, as hereinafter provided.

                Warrants in definitive form may be issued in exchange for
interests in the Global Warrant pursuant to such procedures as the Company and
the Warrant Agent shall reasonably agree upon and shall be issued in the form of
permanent certificated Warrants in registered form in substantially the form set
forth in Exhibit A.

                Ownership of beneficial interests in Global Warrants will be
limited to Participants or Indirect Participants.

                The definitive Warrant Certificates shall be typed, printed,
lithographed or engraved or produced by any combination of these methods or may
be produced in any other manner permitted by the rules of any securities
exchange on which the Warrants may be listed, all as determined by the officers
executing such Warrant Certificates, as evidenced by their execution of such
Warrant Certificates.

                SECTION 2.2. Legends. (a) Each Warrant Certificate issued prior
to the Separation Date shall bear the following legend (the "Separability
Legend"):

        UNTIL THE SEPARATION DATE (AS DEFINED), THIS WARRANT HAS BEEN ISSUED AS,
        AND MUST BE TRANSFERRED AS, A UNIT TOGETHER WITH THE ASSOCIATED __%
        SENIOR NOTES DUE 2010 (THE "NOTES") OF METRICOM, INC. AND METRICOM
        FINANCE, INC.. EACH UNIT CONSISTS OF $1,000 PRINCIPAL AMOUNT OF NOTES
        AND A WARRANT TO PURCHASE __________ SHARES OF COMMON STOCK OF THE
        COMPANY, SUBJECT TO ADJUSTMENT UNDER CERTAIN CIRCUMSTANCES. A COPY OF
        THE WARRANT AGREEMENT PURSUANT TO WHICH THE WARRANTS HAVE BEEN ISSUED IS
        AVAILABLE FROM THE COMPANY UPON REQUEST.

        The Company shall give written notice to the Warrant Agent of the
occurrence of the Separation Date.

                (b) Each Global Warrant issued in global form and deposited with
        DTC shall bear the following legend:

                                       10
<PAGE>   11

                        UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED
                        REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY ("DTC"),
                        TO THE COMPANY OR ITS AGENT FOR REGISTRATION OF
                        TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE
                        ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR SUCH
                        OTHER NAME AS IS REQUESTED BY AN AUTHORIZED
                        REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO CEDE &
                        CO., OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN
                        AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE
                        OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY
                        PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER
                        HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

                        TRANSFERS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO
                        TRANSFERS IN WHOLE, BUT NOT IN PART, TO NOMINEES OF DTC
                        OR TO A SUCCESSOR THEREOF OR SUCH SUCCESSOR'S NOMINEE
                        AND TRANSFERS OF PORTIONS OF THIS GLOBAL SECURITY SHALL
                        BE LIMITED TO TRANSFERS MADE IN ACCORDANCE WITH THE
                        RESTRICTIONS SET FORTH IN THE WARRANT AGREEMENT REFERRED
                        TO HEREIN.

                [(c) Each Warrant Certificate shall bear the following legend:

                        THE EXERCISE OF THIS WARRANT (AND THE OWNERSHIP OF
                        COMMON STOCK ISSUABLE UPON THE EXERCISE THEREOF) MAY BE
                        LIMITED BY METRICOM, INC. IN ORDER TO ENSURE COMPLIANCE
                        WITH THE RULES, REGULATIONS AND POLICIES OF THE FEDERAL
                        COMMUNICATIONS COMMISSION, AND THIS WARRANT WILL NOT BE
                        EXERCISABLE BY ANY HOLDER IF SUCH EXERCISE WOULD CAUSE
                        METRICOM, INC. TO BE IN VIOLATION OF THE COMMUNICATIONS
                        ACT OF 1934 OR THE RULES, REGULATIONS AND POLICIES OF
                        THE FEDERAL COMMUNICATIONS COMMISSION.]

                SECTION 2.3. Execution and Countersignature. Two Officers shall
sign the Warrant Certificates for the Company by manual or facsimile signature.
If an Officer whose signature is on a Warrant Certificate no longer holds that
office at the time the Warrant Agent countersigns the Warrant Certificate, the
Warrant Certificate shall nevertheless be valid. A Warrant Certificate shall not
be valid until an authorized signatory of the Warrant Agent manually
countersigns the Warrant Certificate. Such authorized signature shall be
conclusive evidence that the Warrant Certificate has been countersigned under
this Agreement.

                                       11
<PAGE>   12

                The Warrant Agent shall initially countersign and deliver
Warrant Certificates entitling the Holders thereof to purchase in the aggregate
not more than __________ Warrant Shares upon a written order of the Company
signed by two Officers.

                The Warrant Agent may appoint an agent reasonably acceptable to
the Company to countersign the Warrant Certificates. Unless limited by the terms
of such appointment, such agent may countersign Warrant Certificates whenever
the Warrant Agent may do so. Each reference in this Agreement to
countersignature by the Warrant Agent includes countersignature by such agent.
Such agent will have the same rights as the Warrant Agent for service of notices
and demands.

                SECTION 2.4. Certificate Register. The Warrant Agent shall keep
a register ("Certificate Register") of the Warrant Certificates and of their
transfer and exchange. The Certificate Register shall show the names and
addresses of the respective Holders and the date and number of Warrants
represented on the face of each Warrant Certificate. The Company and the Warrant
Agent may deem and treat the Person in whose name a Warrant Certificate is
registered as the absolute owner of such Warrant Certificate for all purposes
whatsoever and neither the Company nor the Warrant Agent shall be affected by
notice to the contrary.

                SECTION 2.5. Separation of Warrants and Notes. (a) Prior to the
Separation Date no Warrant may be sold, assigned or otherwise transferred to any
Person unless, simultaneously with such transfer, the Warrant Agent receives
confirmation from the Trustee for the Notes that the Holder thereof has
requested a transfer of the related Notes to the same transferee.

                (b) On or after the Separation Date, the holder of a Warrant
Certificate containing a Separability Legend may surrender such Warrant
Certificate accompanied by a written application to the Warrant Agent, duly
executed by the Holder thereof, for a new Warrant Certificate or certificates
not containing the Separability Legend.

                SECTION 2.6. Transfer and Exchange. (a) The Warrant Certificates
shall be issued in registered form only and shall be transferable only upon the
surrender of such Warrant Certificate for registration of transfer. When a
Warrant Certificate is presented to the Warrant Agent with a request to register
a transfer, the Warrant Agent shall register the transfer as requested if the
reasonable requirements of the Warrant Agent and of Section 8-401(1) of the
Uniform Commercial Code as in effect in the State of New York are met; provided,
however, that prior to the Separation Date the Warrant Agent shall not register
a transfer of a Warrant Certificate and such transfer will be void and of no
effect unless the Notes that are a part of the same Unit as the Warrants
represented by the Warrant Certificate to be transferred are simultaneously
transferred to the same transferee. To permit the registration of transfers and
exchanges, the Company shall execute and the Warrant Agent shall countersign
Warrant Certificates at the Warrant Agent's request. All Warrant Certificates
issued upon any registration of transfer or exchange of Warrant Certificates
shall be valid obligations of the Company, entitled to the same benefits under
this Agreement as the Warrant Certificates surrendered upon such registration of
transfer or exchange. No service charge will be made to a Holder for any
registration of transfer or exchange upon surrender of any Warrant Certificate
at the office of the

                                       12
<PAGE>   13

Warrant Agent maintained for that purpose. However, the Company may require
payment of a sum sufficient to cover any tax, assessment or other governmental
charge that may be imposed in connection with any registration of transfer or
exchange of Warrant Certificates but not for any exchange or original issuance
(not involving a transfer) pursuant to Section 2.8, 3.4 or 3.5.

                (b) Notwithstanding any other provisions of this Section 2.6,
unless and until it is exchanged in whole or in part for Warrants in definitive
registered form, the Global Warrant may not be transferred except as a whole by
DTC to a nominee of DTC or by a nominee of DTC to DTC or another nominee of DTC
or by DTC or any such nominee to a successor depositary or a nominee of such
successor depositary. Interests of beneficial owners in the Global Warrant may
be transferred in accordance with the rules and procedures of DTC. Members of,
or participants in, DTC ("Participants") shall have no rights under this
Agreement with respect to the Global Warrant held on their behalf by DTC or the
Warrant Agent as its custodian, and DTC may be treated by the Company, the
Warrant Agent and any agent of the Company or the Warrant Agent as the absolute
owner of such Global Warrant for all purposes whatsoever. Notwithstanding the
foregoing, nothing herein shall prevent the Company, the Warrant Agent or any
agent of the Company or the Warrant Agent from giving effect to any written
certification, proxy or other authorization furnished by DTC or impair, as
between DTC and its Participants, the operation of customary practices governing
the exercise of the rights of a Holder of any Warrants. The registered holder of
the Global Warrant may grant proxies and otherwise authorize any person,
including Participants and persons that may hold interests through Participants,
to take any action which a Holder is entitled to take under this Agreement or
the Warrants.

                If DTC notifies the Company that it is unwilling or unable to
continue as depositary for the Global Warrant or Warrants or if at any time DTC
shall no longer be eligible under the next sentence of this paragraph, the
Company shall appoint a successor depositary with respect to the Warrants. Each
depositary appointed pursuant to this Section 2.6 must, at the time of its
appointment and at all times while it serves as depositary, be a clearing agency
registered under the Exchange Act and any other applicable statute or
regulation. The Company will execute, and the Warrant Agent, upon receipt of
written instructions from the Company, will countersign and deliver, Warrants in
definitive registered form in any authorized denominations, in an aggregate
amount equal to the amount of the Global Warrant or Warrants representing such
Warrants in exchange for such Global Warrant or Warrants if DTC notifies the
Company that it is unwilling or unable to continue as depositary for the Global
Warrant or Warrants or if at any time DTC shall no longer be eligible to serve
as depositary and a successor depositary for the Warrants is not appointed by
the Company within 60 days after the Company receives such notice or becomes
aware of such ineligibility.

                SECTION 2.7. Replacement Certificates. If a mutilated Warrant
Certificate is surrendered to the Warrant Agent or if the Holder of a Warrant
Certificate claims that the Warrant Certificate has been lost, destroyed or
wrongfully taken, the Company shall issue and the Warrant Agent shall
countersign a replacement Warrant Certificate if the reasonable requirements of
the Warrant Agent and of Section 8-405 of the Uniform Commercial Code as in
effect in the State of New York are met. Such Holder shall furnish an indemnity
bond sufficient in the judgment of the Company and the Warrant Agent to protect
the Company and the Warrant Agent from any loss

                                       13
<PAGE>   14

which either of them may suffer if a Warrant Certificate is replaced. The
Company and the Warrant Agent may charge the Holder for their expenses in
replacing a Warrant Certificate. Every replacement Warrant Certificate is an
additional obligation of the Company.

                SECTION 2.8. Temporary Certificates. Until definitive Warrant
Certificates are ready for delivery, the Company may prepare and the Warrant
Agent shall countersign temporary Warrant Certificates. Temporary Warrant
Certificates shall be substantially in the form of definitive Warrant
Certificates but may have variations that the Company considers appropriate for
temporary Warrant Certificates. Without unreasonable delay, the Company shall
prepare and the Warrant Agent shall countersign definitive Warrant Certificates
and deliver them in exchange for temporary Warrant Certificates.

                SECTION 2.9. Cancellation. (a) In the event the Company shall
purchase or otherwise acquire Warrant Certificates, the same shall thereupon be
delivered to the Warrant Agent for cancellation.

                (b) The Warrant Agent and no one else shall cancel and may, but
shall not be required to, destroy all Warrant Certificates surrendered for
transfer, exchange, replacement, exercise or cancellation unless the Company
directs the Warrant Agent to deliver canceled Warrant Certificates to the
Company. The Company may not issue new Warrant Certificates to replace Warrant
Certificates to the extent they represent Warrants which have been exercised or
Warrants which the Company has purchased or otherwise acquired.

                                    ARTICLE 3
                                 Exercise Terms

                SECTION 3.1. Exercise Price. Each Warrant shall initially
entitle the Holder thereof, subject to adjustment pursuant to the terms of this
Agreement, to purchase _________ shares of Common Stock for a per share exercise
price (the "Exercise Price") of $_____.

                SECTION 3.2. Exercise Periods; Restrictions on Exercise. (a)
Subject to the terms and conditions set forth herein, the Warrants shall be
exercisable at any time or from time to time after _____________.

                (b) [Notwithstanding anything to the contrary in this Agreement
or the Warrants, the Company shall have the right not to allow an exercise of
the Warrants (or any portion thereof) to the extent necessary in order to ensure
compliance with the rules, regulations and policies of the Federal
Communications Commission ("FCC Rules"), and Warrants will not be exercisable by
any Holder if such exercise would cause the Company to be in violation of the
Communications Act of 1934 (the "Communications Act") or FCC Rules. The Company
will have the right prior to the exercise of any Warrant to require the Holder
thereof to furnish the Company with such certificates or other information as it
may reasonably be to confirm that such exercise would not cause the Company to
be in violation of the Communications Act or FCC Rules.

                                       14
<PAGE>   15

                (c)] No Warrant shall be exercisable after February __, 2010
(the "Expiration Date").

                SECTION 3.3. Expiration. Each Warrant shall terminate and become
void as of the earlier of (i) the close of business on the Expiration Date or
(ii) the date such Warrant is exercised. The Company shall give notice not less
than 90 and not more than 120 days prior to the Expiration Date to the Holders
of all then outstanding Warrants to the effect that the Warrants will terminate
and become void as of the close of business on the Expiration Date; provided,
however, that if the Company fails to give notice as provided in this Section
3.3, the Warrants will nevertheless expire and become void on the Expiration
Date.

                SECTION 3.4. Manner of Exercise. Warrants may be exercised upon
(i) surrender to the Warrant Agent at the principal corporate trust office of
the Warrant Agent of the related Warrant Certificate, together with the form of
election to purchase Common Stock on the reverse thereof duly filled in and
signed by the Holder thereof, and (ii) payment to the Warrant Agent, for the
account of the Company, of the Exercise Price for each Warrant Share issuable
upon the exercise of such Warrants then exercised. Such payment shall be made
(i) in cash or by certified or official bank check payable to the order of the
Company or by wire transfer of funds to an account designated by the Company for
such purpose or (ii) without the payment of cash, by reducing the number of
shares of Common Stock obtainable upon the exercise of a Warrant so as to yield
a number of shares of Common Stock upon the exercise of such Warrant equal to
the product of (a) the number of shares of Common Stock issuable as of the
Exercise Date upon the exercise of such Warrant (if payment of the Exercise
Price were being made in cash) and (b) the Cashless Exercise Ratio. An exercise
of a Warrant in accordance with the immediately preceding sentence is herein
called a "Cashless Exercise". Upon surrender of a Warrant Certificate
representing more than one Warrant in connection with the holder's option to
elect a Cashless Exercise, the number of shares of Common Stock deliverable upon
a Cashless Exercise shall be equal to the number of shares of Common Stock
issuable upon the exercise of Warrants that the Holder specifies are to be
exercised pursuant to a Cashless Exercise multiplied by the Cashless Exercise
Ratio. All provisions of this Agreement shall be applicable with respect to a
surrender of a Warrant Certificate pursuant to a Cashless Exercise for less than
the full number of Warrants represented thereby. Subject to Section 3.2, the
rights represented by the Warrants shall be exercisable at the election of the
Holders thereof either in full at any time or from time to time in part and in
the event that a Warrant Certificate is surrendered for exercise of less than
all the Warrants represented by such Warrant Certificate at any time prior to
the Expiration Date, a new Warrant Certificate representing the remaining
Warrants shall be issued. The Warrant Agent shall countersign and deliver the
required new Warrant Certificates, and the Company, at the Warrant Agent's
request, shall supply the Warrant Agent with Warrant Certificates duly signed on
behalf of the Company for such purpose.

                SECTION 3.5. Issuance of Warrant Shares. Subject to Section 2.6,
upon the surrender of Warrant Certificates and payment of the per share Exercise
Price, as set forth in Section 3.4, the Company shall issue and cause the
Warrant Agent or, if appointed, a transfer agent for the Common Stock ("Transfer
Agent") to countersign and deliver to or upon the written

                                       15
<PAGE>   16

order of the Holder and in such name or names as the Holder may designate a
certificate or certificates for the number of full Warrant Shares so purchased
upon the exercise of such Warrants or other securities or property to which it
is entitled, registered or otherwise, to the Person or Persons entitled to
receive the same, together with cash as provided in Section 3.6 in respect of
any fractional Warrant Shares otherwise issuable upon such exercise. Such
certificate or certificates shall be deemed to have been issued and any Person
so designated to be named therein shall be deemed to have become a holder of
record of such Warrant Shares as of the date of the surrender of such Warrant
Certificates and payment of the per share Exercise Price, as aforesaid;
provided, however, that if, at such date, the transfer books for the Warrant
Shares shall be closed, the certificates for the Warrant Shares in respect of
which such Warrants are then exercised shall be issuable as of the date on which
such books shall next be opened and until such date the Company shall be under
no duty to deliver any certificates for such Warrant Shares; provided further,
however, that such transfer books, unless otherwise required by law, shall not
be closed at any one time for a period longer than 20 calendar days.

                SECTION 3.6. Fractional Warrant Shares. The Company shall not be
required to issue fractional Warrant Shares on the exercise of Warrants. If more
than one Warrant shall be exercised in full at the same time by the same Holder,
the number of full Warrant Shares which shall be issuable upon such exercise
shall be computed on the basis of the aggregate number of Warrant Shares
purchasable pursuant thereto. If any fraction of a Warrant Share would, except
for the provisions of this Section 3.6, be issuable on the exercise of any
Warrant (or specified portion thereof), the Company shall pay at the time of
exercise an amount in cash equal to the Current Market Value per Warrant Share,
as determined on the day immediately preceding the date the Warrant is
exercised, multiplied by such fraction, computed to the nearest whole cent.

                SECTION 3.7. Reservation of Warrant Shares. The Company shall at
all times keep reserved out of its authorized shares of Common Stock a number of
shares of Common Stock sufficient to provide for the exercise of all outstanding
Warrants. The registrar for the Common Stock shall at all times until the
Expiration Date reserve such number of authorized shares as shall be required
for such purpose. The Company will keep a copy of this Agreement on file with
the Transfer Agent. All Warrant Shares which may be issued upon exercise of
Warrants shall, upon issue, be fully paid, nonassessable, free of preemptive
rights and free from all taxes, liens, charges and security interests with
respect to the issue thereof. The Company will supply such Transfer Agent with
duly executed stock certificates for such purpose and will itself provide or
otherwise make available any cash which may be payable as provided in Section
3.6. The Company will furnish to such Transfer Agent a copy of all notices of
adjustments (and certificates related thereto) transmitted to each Holder.

                Before taking any action which would cause an adjustment
pursuant to Article 4 to reduce the Exercise Price below the then par value (if
any) of the Common Stock, the Company shall take any and all corporate action
which may, in the opinion of its counsel, be necessary in order that the Company
may validly and legally issue fully paid and nonassessable shares of Common
Stock at the Exercise Price as so adjusted.

                                       16
<PAGE>   17

                The Company covenants that all shares of Common Stock which may
be issued upon exercise of Warrants will, upon issue, be fully paid,
nonassessable, free of preemptive rights, free from all taxes and free from all
liens, charges and security interests, created by or through the Company, with
respect to the issue thereof.

                SECTION 3.8. Compliance with Law. Notwithstanding anything in
this Agreement to the contrary, in no event shall a Holder be entitled to
exercise a Warrant unless (i) a registration statement filed under the
Securities Act in respect of the issuance of the Warrant Shares is then
effective or (ii) in the opinion of counsel to the Company addressed to the
Warrant Agent the exercise of such Warrants is exempt from the registration
requirements of the Securities Act and such securities are qualified for sale or
exempt from qualification under the applicable securities laws of the States or
other jurisdictions in which such holders reside.

                SECTION 3.9 Listing of Warrant Shares. The Company shall use its
reasonable best efforts to the Warrant Shares to be approved for listing in the
Nasdaq Stock Market by ____________.

                                    ARTICLE 4
                             Antidilution Provisions

                SECTION 4.1. Changes in Common Stock. In the event that at any
time or from time to time the Company shall (i) pay a dividend or make a
distribution on its Common Stock payable in shares of its Common Stock or other
equity interests of the Company, (ii) subdivide its outstanding shares of Common
Stock into a larger number of shares of Common Stock, (iii) combine its
outstanding shares of Common Stock into a smaller number of shares of Common
Stock or (iv) increase or decrease the number of shares of Common Stock
outstanding by reclassification of its Common Stock, then the number of shares
of Common Stock issuable upon exercise of each Warrant immediately after the
happening of such event shall be adjusted to a number determined by multiplying
the number of shares of Common Stock that such holder would have owned or have
been entitled to receive upon exercise had such Warrants been exercised
immediately prior to the happening of the events described above (or, in the
case of a dividend or distribution of Common Stock or other shares of capital
stock, immediately prior to the record date therefor) by a fraction, the
numerator of which shall be the total number of shares of Common Stock
outstanding immediately after the happening of the events described above and
the denominator of which shall be the total number of shares of Common Stock
outstanding immediately prior to the happening of the events described above;
and subject to Section 4.8, the Exercise Price for each Warrant shall be
adjusted to a number determined by dividing the Exercise Price immediately prior
to such event by the aforementioned fraction. An adjustment made pursuant to
this Section 4.1 shall become effective immediately after the effective date of
such event, retroactive to the record date therefor in the case of a dividend or
distribution in shares of Common Stock or other shares of the Company's capital
stock.

                SECTION 4.2. Cash Dividends and Other Distributions. In the
event that at any time or from time to time the Company shall distribute to all
holders of Common Stock (i) any dividend or other distribution of cash,
evidences of its indebtedness, shares of its capital stock or

                                       17
<PAGE>   18

any other assets, properties or debt securities or (ii) any options, warrants or
other rights to subscribe for or purchase any of the foregoing (other than, in
each case, (w) the issuance of any rights under a shareholder rights plan, (x)
any dividend or distribution described in Section 4.1, (y) any rights, options,
warrants or securities described in Section 4.3 and (z) any cash dividends or
other cash distributions from current or retained earnings), then the number of
shares of Common Stock issuable upon the exercise of each Warrant shall be
increased to a number determined by multiplying the number of shares of Common
Stock issuable upon the exercise of such Warrant immediately prior to the record
date for any such dividend or distribution by a fraction, the numerator of which
shall be the Current Market Value per share of Common Stock on the record date
for such dividend or distribution and the denominator of which shall be such
Current Market Value per share of Common Stock on the record date for such
dividend or distribution less the sum of (x) the amount of cash, if any,
distributed per share of Common Stock and (y) the fair value (as determined in
good faith by the Board of Directors, whose determination shall be evidenced by
a board resolution filed with the Warrant Agent, a copy of which will be sent to
Holders upon request) of the portion, if any, of the distribution applicable to
one share of Common Stock consisting of evidences of indebtedness, shares of
stock, securities, other assets or property, warrants, options or subscription
or purchase rights; and, subject to Section 4.8, the Exercise Price shall be
adjusted to a number determined by dividing the Exercise Price immediately prior
to such record date by the aforementioned fraction. Such adjustments shall be
made whenever any distribution is made and shall become effective as of the date
of distribution, retroactive to the record date for any such distribution;
provided, however, that the Company is not required to make an adjustment
pursuant to this Section 4.2 if at the time of such distribution the Company
makes the same distribution to Holders of Warrants as it makes to holders of
Common Stock pro rata based on the number of shares of Common Stock for which
such Warrants are exercisable (whether or not currently exercisable). No
adjustment shall be made pursuant to this Section 4.2 which shall have the
effect of decreasing the number of shares of Common Stock issuable upon exercise
of each Warrant or increasing the Exercise Price.

                SECTION 4.3. Rights Issue to All Holders of Common Stock. In the
event that at any time or from time to time the Company shall issue to all
holders of Common Stock without any charge, rights, options or warrants
entitling the holders thereof to subscribe for shares of Common Stock, or
securities convertible into or exchangeable or exercisable for Common Stock,
entitling such holders to subscribe for or purchase shares of Common Stock at a
price per share that is lower at the record date for such issuance than the then
Current Market Value per share of Common Stock other than in connection with the
adoption of a shareholder rights plan by the Company, then the number of shares
of Common Stock issuable upon the exercise of each Warrant shall be increased to
a number determined by multiplying the number of shares of Common Stock
theretofore issuable upon exercise of each Warrant by a fraction, the numerator
of which shall be the number of shares of Common Stock outstanding on the date
of issuance of such rights, options, warrants or securities plus the number of
additional shares of Common Stock offered for subscription or purchase or into
or for which such securities that are issued are convertible, exchangeable or
exercisable, and the denominator of which shall be the number of shares of
Common Stock outstanding on the date of issuance of such rights, options,
warrants or securities plus the total number of shares of Common Stock which the
aggregate consideration expected to be received by the Company (assuming the
exercise or conversion of all such rights,

                                       18
<PAGE>   19

options, warrants or securities) would purchase at the then Current Market Value
per share of Common Stock. Subject to Section 4.8, in the event of any such
adjustment, the Exercise Price shall be adjusted to a number determined by
dividing the Exercise Price immediately prior to such date of issuance by the
aforementioned fraction. Such adjustment shall be made immediately after such
rights, options or warrants are issued and shall become effective, retroactive
to the record date for the determination of stockholders entitled to receive
such rights, options, warrants or securities. Notwithstanding anything to the
contrary in this Article IV, no adjustment to the number of Warrant Shares
issuable upon exercise of the Warrants or to the Exercise Price shall be made as
a result of the offering by the Company to all holders of its Common Stock of
rights, options or warrants entitling the holders thereof to subscribe for
Common Stock or securities convertible into or exchangeable or exercisable for
shares of Common Stock, resulting from the operation of any anti-dilution
provision in any warrant or other security of the Company convertible into,
exercisable or exchangeable for Common Stock of the Company, which such warrant
or security is outstanding on the date of this Agreement. No adjustment shall be
made pursuant to this Section 4.3 which shall have the effect of decreasing the
number of shares of Common Stock purchasable upon exercise of each Warrant or of
increasing the Exercise Price.

                SECTION 4.4. Other Issuances of Common Stock or Rights. In the
event that at any time or from time to time the Company shall issue (i) shares
of Common Stock (subject to the provisions below), (ii) rights, options or
warrants entitling the holder thereof to subscribe for shares of Common Stock
(provided, however, that no adjustment shall be made upon the exercise of such
rights, options or warrants), or (iii) securities convertible into or
exchangeable or exercisable for Common Stock (provided, however, that no
adjustment shall be made upon the conversion, exchange or exercise of such
securities (other than issuances specified in (i), (ii) or (iii) which are made
as the result of anti- dilution adjustments in such securities)), at a price per
share at the record date of such issuance that is less than the then Current
Market Value per share of Common Stock, then the number of shares of Common
Stock issuable upon the exercise of each Warrant shall be increased to a number
determined by multiplying the number of shares of Common Stock theretofore
issuable upon exercise of each Warrant by a fraction, the numerator of which
shall be the number of shares of Common Stock outstanding immediately after such
sale or issuance plus the number of additional shares of Common Stock offered
for subscription or purchase or into or for which such securities that are
issued are convertible, exchangeable or exercisable, and the denominator of
which shall be the number of shares of Common Stock outstanding immediately
prior to such sale or issuance plus the total number of shares of Common Stock
which the aggregate consideration expected to be received by the Company
(assuming the exercise or conversion of all such rights, options, warrants or
securities, if any) would purchase at the then Current Market Value per share of
Common Stock, and subject to Section 4.8 the Exercise Price shall be adjusted to
a number determined by dividing the Exercise Price immediately prior to such
date of issuance by the aforementioned fraction; provided, however, that no
adjustment to the number of Warrant Shares issuable upon the exercise of the
Warrants or to the Exercise Price shall be made as a result of (i) the issuance
of shares of Common Stock under any warrants, options or other rights existing
on the date hereof, (ii) the issuance of shares of Common Stock in bona fide
public or private offerings that are underwritten or in which a placement agent
is retained by the Company or (iii) the issuance of options, rights or shares of
Common Stock pursuant to any option, under any employee benefit plans approved
by the Board

                                       19
<PAGE>   20

of Directors. Such adjustments shall be made whenever such rights, options or
warrants or convertible securities are issued. No adjustment shall be made
pursuant to this Section 4.4 which shall have the effect of decreasing the
number of shares of Common Stock issuable upon exercise of each warrant or of
increasing the Exercise Price. For purposes of Section 4.4 only, any issuance of
Common Stock, or rights, options or warrants to subscribe for, or other
securities convertible into or exercisable or exchangeable for, Common Stock,
which issuance (or agreement to issue) (A) is in exchange for or otherwise in
connection with the bona fide acquisition of property (excluding any such
exchange exclusively for cash) of any Person and (B) is at a price per share
determined by the Board of Directors to be equal to the fair market value
thereof at the time an agreement in principle is reached or at the time a
definitive agreement is entered into, shall be deemed to have been made at a
price per share equal to the Current Market Value per share at the record date
with respect to such issuance (the time of closing or consummation of such
exchange or acquisition) if such definitive agreement is entered into within 90
days of the date of such agreement in principle.

                SECTION 4.5. Combination; Liquidation. (a) Except as provided in
Section 4.5(b), in the event of a Combination, each Holder shall have the right
to receive upon exercise of the Warrants the kind and amount of shares of
capital stock or other securities or property which such Holder would have been
entitled to receive upon or as a result of such Combination had such Warrant
been exercised immediately prior to such event. Unless paragraph (b) is
applicable to a Combination, the Company shall provide that the surviving or
acquiring Person (the "Successor Company") in such Combination will enter into
an agreement with the Warrant Agent confirming the Holders' rights pursuant to
this Section 4.5(a) and providing for adjustments, which shall be as nearly
equivalent as may be practicable to the adjustments provided for in this Article
4. The provisions of this Section 4.5(a) shall similarly apply to successive
Combinations involving any Successor Company.

                (b) In the event of (i) a Combination where consideration to the
holders of Common Stock in exchange for their shares is payable solely in cash
or (ii) the dissolution, liquidation or winding-up of the Company, the holders
of the Warrants shall be entitled to receive, upon surrender of their Warrant
Certificates, distributions on an equal basis with the holders of Common Stock
or other securities, issuable upon exercise of the Warrants, as if the Warrants
had been exercised immediately prior to such event, less the Exercise Price.

                In case of any Combination described in this Section 4.5(b), the
surviving or acquiring Person and, in the event of any dissolution, liquidation
or winding-up of the Company, the Company shall deposit promptly with the
Warrant Agent the funds, if any, necessary to pay to the holders of the Warrants
the amounts to which they are entitled as described above. After such funds and
the surrendered Warrant Certificates are received, the Warrant Agent is required
to deliver a check in such amount as is appropriate (or, in the case of
consideration other than cash, such other consideration as is appropriate) to
such Person or Persons as it may be directed in writing by the Holders
surrendering such Warrants.

                SECTION 4.6. Other Events. If any event occurs as to which the
foregoing provisions of this Article 4 are not strictly applicable or, if
strictly applicable, would not, in the

                                       20
<PAGE>   21

good faith judgment of the Board of Directors, fairly and adequately protect the
purchase rights of the Warrants in accordance with the essential intent and
principles of such provisions, then such Board of Directors shall make such
adjustments in the application of such provisions, in accordance with such
essential intent and principles, as shall be reasonably necessary, in the good
faith opinion of such Board of Directors, to protect such purchase rights as
aforesaid, but in no event shall any such adjustment have the effect of
increasing the Exercise Price or decreasing the number of shares of Common Stock
issuable upon exercise of any Warrant.

                SECTION 4.7. Superseding Adjustment. Upon the expiration of any
rights, options, warrants or conversion or exchange privileges which resulted in
adjustments pursuant to this Article 4, if any thereof shall not have been
exercised, the number of Warrant Shares issuable upon the exercise of each
Warrant shall be readjusted pursuant to the applicable section of Article 4 as
if (A) the only shares of Common Stock issuable upon exercise of such rights,
options, warrants, conversion or exchange privileges were the shares of Common
Stock, if any, actually issued upon the exercise of such rights, options,
warrants or conversion or exchange privileges and (B) shares of Common Stock
actually issued, if any, were issuable for the consideration actually received
by the Company upon such exercise plus the aggregate consideration, if any,
actually received by the Company for the issuance, sale or grant of all such
rights, options, warrants or conversion or exchange privileges whether or not
exercised and the Exercise Price shall be readjusted inversely; provided,
however, that no such readjustment shall (except by reason of an intervening
adjustment under Section 4.1) have the effect of decreasing the number of
Warrant Shares purchasable upon the exercise of each Warrant or increase the
Exercise Price by an amount in excess of the amount of the adjustment initially
made in respect of the issuance, sale or grant of such rights, options, warrants
or conversion or exchange privileges.

                SECTION 4.8. Minimum Adjustment. The adjustments required by the
preceding Sections of this Article 4 shall be made whenever and as often as any
specified event requiring an adjustment shall occur, except that no adjustment
of the Exercise Price or the number of shares of Common Stock issuable upon
exercise of Warrants that would otherwise be required shall be made unless and
until such adjustment either by itself or with other adjustments not previously
made increases or decreases by at least 1% the Exercise Price or the number of
shares of Common Stock issuable upon exercise of Warrants immediately prior to
the making of such adjustment. Any adjustment representing a change of less than
such minimum amount shall be carried forward and made as soon as such
adjustment, together with other adjustments required by this Article 4 and not
previously made, would result in a minimum adjustment. For the purpose of any
adjustment, any specified event shall be deemed to have occurred at the close of
business on the date of its occurrence. In computing adjustments under this
Article 4, fractional interests in Common Stock shall be taken into account to
the nearest one-hundredth of a share.

                SECTION 4.9. Notice of Adjustment. Whenever the Exercise Price
or the number of shares of Common Stock and other property, if any, issuable
upon exercise of the Warrants is adjusted, as herein provided, the Company shall
deliver to the Warrant Agent a certificate of a firm of independent accountants
selected by the Board of Directors (who may be the regular accountants employed
by the Company) setting forth, in reasonable detail, the event requiring the
adjustment and the method by which such adjustment was calculated (including a
description of

                                       21
<PAGE>   22

the basis on which (i) the Board of Directors determined the fair value of any
evidences of indebtedness, other securities or property or warrants, options or
other subscription or purchase rights and (ii) the Current Market Value of the
Common Stock was determined, if either of such determinations were required),
and specifying the Exercise Price and the number of shares of Common Stock
issuable upon exercise of Warrants after giving effect to such adjustment. The
Company shall promptly cause the Warrant Agent to mail a copy of such
certificate to each Holder in accordance with Section 7.6. The Warrant Agent
shall be entitled to rely on such certificate and shall be under no duty or
responsibility with respect to any such certificate, except to exhibit the same
from time to time, to any Holder desiring an inspection thereof during
reasonable business hours. The Warrant Agent shall not at any time be under any
duty or responsibility to any Holder to determine whether any facts exist which
may require any adjustment of the Exercise Price or the number of shares of
Common Stock or other stock or property issuable on exercise of the Warrants, or
with respect to the nature or extent of any such adjustment when made, or with
respect to the method employed in making such adjustment or the validity or
value of any shares of Common Stock, evidences of indebtedness, warrants,
options, or other securities or property.

                SECTION 4.10. Notice of Certain Transactions. In the event that
the Company shall propose to (a) pay any dividend payable in securities of any
class to the holders of its Common Stock or to make any other non-cash dividend
or distribution to the holders of its Common Stock, (b) offer the holders of its
Common Stock rights to subscribe for or to purchase any securities convertible
into shares of Common Stock or shares of stock of any class or any other
securities, rights or options, (c) issue any (i) shares of Common Stock, (ii)
rights, options or warrants entitling the holders thereof to subscribe for
shares of Common Stock, or (iii) securities convertible into or exchangeable or
exercisable for Common Stock (in the case of (i), (ii) and (iii), if such
issuance or adjustment would result in an adjustment hereunder), (d) effect any
capital reorganization, reclassification, consolidation or merger, (e) effect
the voluntary or involuntary dissolution, liquidation or winding-up of the
Company or (f) make a tender offer or exchange offer with respect to the Common
Stock, the Company shall within 5 days send to the Warrant Agent and the Warrant
Agent shall within 5 days send the Holder a notice (in such form as shall be
furnished to the Warrant Agent by the Company) of such proposed action or offer.
Such notice shall be mailed by the Warrant Agent to the Holders at their
addresses as they appear in the Certificate Register, which shall specify the
record date for the purposes of such dividend, distribution or rights, or the
date such issuance or event is to take place and the date of participation
therein by the holders of Common Stock, if any such date is to be fixed, and
shall briefly indicate the effect of such action on the Common Stock and on the
number and kind of any other shares of stock and on other property, if any, and
the number of shares of Common Stock and other property, if any, issuable upon
exercise of each Warrant and the Exercise Price after giving effect to any
adjustment pursuant to Article 4 which will be required as a result of such
action. Such notice shall be given as promptly as possible and (x) in the case
of any action covered by clause (a) or (b) above, at least 10 days prior to the
record date for determining holders of the Common Stock for purposes of such
action or (y) in the case of any other such action, at least 20 days prior to
the date of the taking of such proposed action or the date of participation
therein by the holders of Common Stock, whichever shall be the earlier.

                                       22
<PAGE>   23

                SECTION 4.11. Adjustment to Warrant Certificate. The form of
Warrant Certificate need not be changed because of any adjustment made pursuant
to this Article 4, and Warrant Certificates issued after such adjustment may
state the same Exercise Price and the same number of shares of Common Stock
issuable upon exercise of the Warrants as are stated in the Warrant Certificates
initially issued pursuant to this Agreement. The Company, however, may at any
time in its sole discretion make any change in the form of Warrant Certificate
that it may deem appropriate to give effect to such adjustments and that does
not affect the substance of the Warrant Certificate, and any Warrant Certificate
thereafter issued or countersigned, whether in exchange or substitution for an
outstanding Warrant Certificate or otherwise, may be in the form as so changed.

                SECTION 4.12. Exceptions to Antidilution Provisions. Without
limiting any other exception contained in this Article 4, and in addition
thereto, no adjustment need be made for:

                (i) grants or exercises of rights granted to employees,
        directors or consultants of the Company or any of its subsidiaries or
        shares of Common Stock issued or granted to such persons under
        equity-based incentive or corporation plans or otherwise, whether or not
        upon the exercise, exchange or conversion of any such rights;

                (ii) options, warrants or other agreements or rights to purchase
        capital stock of the Company entered into prior to the date of the
        issuance of the Warrants and any issuance of shares of Common Stock in
        connection therewith;

                (iii) rights to purchase shares of Common Stock pursuant to a
        Company plan for reinvestment of dividends or interest;

                (iv) a change in the par value of shares of Common Stock
        (including a change from par value to no par value or vice versa);

                (v) the consummation of the Reorganization; and

                (vi) bona fide public offerings or private placements pursuant
        to Section 4(2) of the Securities Act, Regulation D thereunder or
        Regulation S of any security trading on any national securities
        exchange, the Nasdaq system or in the over the counter market, or of a
        security directly or indirectly convertible or exchangeable for any such
        security (the latter security being a "Reference Security"), involving
        at least one investment bank of national reputation, if such security is
        sold to investors at a price equal to the closing sale, bid or ask price
        (whichever is customary)(less such discount, if any, as such investment
        bank shall reasonably determine is necessary to permit the consummation
        of such public offering or private placement) of such security or the
        Reference Security on the date of the public offering or private
        placement.

                                       23
<PAGE>   24

                                    ARTICLE 5
                                  Warrant Agent

                SECTION 5.1. Appointment of Warrant Agent. The Company hereby
appoints the Warrant Agent to act as agent for the Company in accordance with
the express provisions of this Agreement and the Warrant Agent hereby accepts
such appointment.

                SECTION 5.2. Right and Duties of Warrant Agent. (a) Agent for
the Company. In acting under this Warrant Agreement and in connection with the
Warrant Certificates, the Warrant Agent is acting solely as agent for the
Company and does not assume any obligation or relationship or agency or trust
for or with any of the holders of Warrant Certificates or beneficial owners of
Warrants.

                (b) The Warrant Agent may consult with counsel satisfactory to
it (who may be counsel to the Company), and the advice of such counsel shall be
full and complete authorization and protection in respect of any action taken,
suffered or omitted by it hereunder in good faith and in accordance with the
advice of such counsel.

                (c) The Warrant Agent shall be protected and shall incur no
liability for or in respect of any action taken or thing suffered by it in
reliance upon any Warrant Certificate, notice, direction, consent, certificate,
affidavit, statement, opinion or other paper or document reasonably believed by
it to be genuine and to have been presented or signed by the proper parties.

                (d) The Warrant Agent shall be obligated to perform only such
duties as are specifically set forth herein and in the Warrant Certificates, and
no implied duties or obligations of the Warrant Agent shall be read into this
Agreement or the Warrant Certificates. The Warrant Agent shall not be under any
obligation to take any action hereunder which may tend to involve it in any
expense or liability for which it does not receive indemnity if such indemnity
is reasonably requested. The Warrant Agent shall not be accountable or under any
duty or responsibility for the use by the Company of any of the Warrant
Certificates countersigned by the Warrant Agent and delivered by it to the
Holders or on behalf of the Holders pursuant to this Agreement or for the
application by the Company of the proceeds of the Warrants. The Warrant Agent
shall have no duty or responsibility in case of any default by the Company in
the performance of its covenants or agreements contained herein or in the
Warrant Certificates or in the case of the receipt of any written demand from a
Holder with respect to such default, including any duty or responsibility to
initiate or attempt to initiate any proceedings at law or otherwise.

                (e) The Warrant Agent shall not at any time be under any duty or
responsibility to any Holder to determine whether any facts exist that may
require an adjustment of the number of shares of Common Stock issuable upon
exercise of each Warrant or the Exercise Price, or with respect to the nature or
extent of any adjustment when made or with respect to the method employed or
provided to be employed herein or in any supplemental agreement in making the
same. The Warrant Agent shall not be accountable with respect to the validity or
value of any shares of Common Stock or of any securities or property which may
at any time be issued or

                                       24
<PAGE>   25

delivered upon the exercise of any Warrant or upon any adjustment pursuant to
Article 4, and it makes no representation with respect thereto. The Warrant
Agent shall not be responsible for any failure of the Company to make any cash
payment or to issue, transfer or deliver any shares of Common Stock or stock
certificates upon the surrender of any Warrant Certificate for the purpose of
exercise or upon any adjustment pursuant to Article 4, or to comply with any of
the covenants of the Company contained in Article 4.

                SECTION 5.3. Individual Rights of Warrant Agent. The Warrant
Agent and any stockholder, director, officer or employee of the Warrant Agent
may buy, sell or deal in any of the Warrants or other securities of the Company
or its affiliates or become pecuniarily interested in transactions in which the
Company or its affiliates may be interested, or contract with or lend money to
the Company or its affiliates or otherwise act as fully and freely as though it
were not the Warrant Agent under this Agreement. Nothing herein shall preclude
the Warrant Agent from acting in any other capacity for the Company or for any
other legal entity.

                SECTION 5.4. Warrant Agent's Disclaimer. The Warrant Agent shall
not be responsible for and makes no representation as to the validity or
adequacy of this Agreement or the Warrant Certificates and it shall not be
responsible for any statement in this Agreement or the Warrant Certificates
other than its countersignature thereon.

                SECTION 5.5. Compensation and Indemnity. The Company and the
Warrant Agent have entered into an agreement pursuant to which the Company
agrees to pay the Warrant Agent from time to time compensation for its services
and to reimburse the Warrant Agent upon request for all reasonable out-of-pocket
expenses incurred by it, including the reasonable compensation and expenses of
the Warrant Agent and its directors, officers, agents and counsel. The Company
shall indemnify the Warrant Agent and its directors, officers, agents and
counsel against any and all loss, liability, damage, claim or expense (including
agents' and attorneys' fees and expenses) incurred by the Warrant Agent without
negligence, bad faith or willful misconduct on its part arising out of or in
connection with the acceptance or performance of its duties under this
Agreement. The Warrant Agent shall notify the Company promptly of any claim for
which it may seek indemnity. The Company need not reimburse any expense or
indemnify against any loss or liability incurred by the Warrant Agent through
wilful misconduct, negligence or bad faith. The Company's payment obligations
pursuant to this Section 6.5 shall survive the termination of this Agreement.

                To secure the Company's payment obligations under this
Agreement, the Warrant Agent shall have a lien prior to the Holders on all money
or property held or collected by the Warrant Agent.

                SECTION 5.6. Successor Warrant Agent. The Company agrees for the
benefit of the Holders that there shall at all times be a Warrant Agent
hereunder until all the Warrants have been exercised or are no longer
exercisable.

                (a) The Warrant Agent may at any time resign by giving written
notice to the Company of such intention on its part, specifying the date on
which its desired resignation shall

                                       25
<PAGE>   26

become effective; provided, however, that such date shall not be less than 60
days after the date on which such notice is given unless the Company otherwise
agrees. The Warrant Agent hereunder may be removed at any time by the filing
with it of an instrument in writing signed by or on behalf of the Company and
specifying such removal and the date when it shall become effective, which date
shall not be less than 60 days after such notice is given unless the Warrant
Agent otherwise agrees. Any removal under this Section 6.6 shall take effect
upon the appointment by the Company as hereinafter provided of a successor
Warrant Agent (which shall be a bank or trust company authorized under the laws
of the jurisdiction of its organization to exercise corporate trust powers) and
the acceptance of such appointment by such successor Warrant Agent. If a
successor Warrant Agent does not take office within 60 days after the retiring
Warrant Agent resigns or is removed, the retiring Warrant Agent or the Holders
of 10% of the Warrants may petition, at the expense of the Company, any court of
competent jurisdiction for the appointment of a successor.

                (b) In the event that at any time the Warrant Agent shall
resign, or shall be removed, or shall become incapable of acting, or shall be
adjudged a bankrupt or insolvent, or shall commence a voluntary case under
Federal bankruptcy laws, as now or hereafter constituted, or under any other
applicable Federal or state bankruptcy, insolvency or similar law, or shall
consent to the appointment of or taking possession by a receiver, custodian,
liquidator, assignee, trustee, sequestrator (or other similar official) of the
Warrant Agent or its property or affairs, or shall make an assignment for the
benefit of creditors, or shall admit in writing its inability to pay its debts
generally as they become due, or shall take corporate action in furtherance of
any such action, or a decree or order for relief by a court having jurisdiction
in the premises shall have been entered in respect of the Warrant Agent in an
involuntary case under the Federal bankruptcy laws, as now or hereafter
constituted, or any other applicable Federal or State bankruptcy, insolvency or
similar law, or a decree or order by a court having jurisdiction in the premises
shall have been entered for the appointment of a receiver, custodian,
liquidator, assignee, trustee, sequestrator (or similar official) of the Warrant
Agent or of its property or affairs, or any public officer shall take charge or
control of the Warrant Agent or of its property or affairs for the purpose of
rehabilitation, conservation, winding up or liquidation, a successor Warrant
Agent, qualified as aforesaid, shall be appointed by the Company by an
instrument in writing filed with the successor Warrant Agent. Upon the
appointment as aforesaid of a successor Warrant Agent and acceptance by the
successor Warrant Agent of such appointment, the Warrant Agent shall cease to be
the Warrant Agent hereunder; provided, however, that in the event of the
resignation of the Warrant Agent hereunder, such resignation shall be effective
on the earlier of (i) the date specified in the Warrant Agent's notice of
resignation and (ii) the appointment and acceptance of a successor Warrant Agent
hereunder.

                (c) Any successor Warrant Agent appointed hereunder shall
execute, acknowledge and deliver to its predecessor and to the Company an
instrument accepting such appointment hereunder, and thereupon such successor
Warrant Agent, without any further act, deed or conveyance, shall become vested
with all the rights and obligations of such predecessor with like effect as if
originally named as Warrant Agent hereunder, and such predecessor, upon payment
of its charges and disbursements then unpaid, shall thereupon become obligated
to transfer, deliver and pay over, and such successor Warrant Agent shall be
entitled to receive, all

                                       26
<PAGE>   27

monies, securities and other property on deposit with or held by such
predecessor, as Warrant Agent hereunder.

                (d) Any corporation into which the Warrant Agent hereunder may
be merged or consolidated, or any corporation resulting from any merger or
consolidation to which the Warrant Agent shall be a party, or any corporation to
which the Warrant Agent shall sell or otherwise transfer all or substantially
all the corporate trust or stock transfer assets and business of the Warrant
Agent, provided that it shall be qualified as aforesaid, shall be the successor
Warrant Agent under this Agreement without the execution or filing of any paper
or any further act on the part of any of the parties hereto.

                                    ARTICLE 8
                                  Miscellaneous

                SECTION 8.1. Financial Statements and Reports of the Company.
The Company agrees (a) to provide to each Holder, without cost to such Holder,
copies of the annual and quarterly reports and documents that the Company files
with the Securities and Exchange Commission (to the extent such filings are
accepted by the Commission and whether or not the Company has a class of
securities registered under the Exchange Act or that the Company would be
required to file were it subject to Section 13 or 15 of the Exchange Act, within
15 days after the date of such filing or the date on which the Company would be
required to file such reports or documents, and all such annual or quarterly
reports shall include the geographic segment financial information as has
heretofore been disclosed by the Company in its public filings with the
Securities and Exchange Commission, and (b) if filing such reports and documents
is not accepted by the Securities and Exchange Commission or is prohibited under
the Exchange Act, to supply at the Company's expense copies of such reports and
documents to any prospective Holder promptly upon request.

                SECTION 8.2. Third Party Beneficiaries. The Holders shall be
third party beneficiaries to the agreements made hereunder between the Company,
on the one hand, and the Warrant Agent, on the other hand, and each Holder shall
have the right to enforce such agreements directly to the extent it deems such
enforcement necessary or advisable to protect its rights or the rights of
Holders hereunder.

                SECTION 8.3. Rights of Holders. Holders of unexercised Warrants
are not entitled to (i) receive dividends or other distributions, (ii) receive
notice of or vote at any meeting of the stockholders, (iii) consent to any
action of the stockholders, (iv) receive notice as stockholders of any other
proceedings of the Company, (v) exercise any preemptive rights or (vi) exercise
any other rights whatsoever as stockholders of the Company.

                SECTION 8.4. Amendment. This Agreement may be amended by the
parties hereto without the consent of any Holder for the purpose of curing any
ambiguity, or of curing, correcting or supplementing any defective provision
contained herein or adding or changing any other provisions with respect to
matters or questions arising under this Agreement as the

                                       27
<PAGE>   28

Company and the Warrant Agent may deem necessary or desirable (including without
limitation any addition or modification to provide for compliance with the
transfer restrictions set forth herein); provided, however, that such action
shall not adversely affect the rights of any of the Holders. Any amendment or
supplement to this Agreement that has an adverse effect on the interests of the
Holders shall require the written consent of the Holders of a majority of the
then outstanding Warrants. The consent of each Holder affected shall be required
for any amendment pursuant to which the Exercise Price would be increased or the
number of Warrant Shares issuable upon exercise of Warrants would be decreased
(other than pursuant to adjustments provided herein) or the exercise period with
respect to the Warrants would be shortened. In determining whether the Holders
of the required number of Warrants have concurred in any direction, waiver or
consent, Warrants owned by the Company or by any Person directly or indirectly
controlling or controlled by or under direct or indirect common control with the
Company shall be disregarded and deemed not to be outstanding, except that, for
the purpose of determining whether the Warrant Agent shall be protected in
relying on any such direction, waiver or consent, only Warrants which the
Warrant Agent actually knows are so owned shall be so disregarded. Also, subject
to the foregoing, only Warrants outstanding at the time shall be considered in
any such determination.

                SECTION 8.5. Notices. Any notice or communication shall be in
writing and delivered in Person or mailed by first-class mail addressed as
follows:

               if to the Company:

               Metricom, Inc. or
               980 University Avenue
               Los Gatos, California
               Attention:  Chief Financial Officer
               Telecopy No.:  408-354-1024

               With copies to:
               Cooley Godward LLP
               1 Maritime Plaza
               San Francisco, California
               Attention:  Kenneth Guernsey, Esq.
               Telecopy No.:  415-951-3699

               If to the Trustee:

               Bank One Trust Company, N.A.
               One North State Street
               9th Floor
               Chicago, Illinois 60602
               Telecopy No.:  312-407-1708
               Attention:  Corporate Trust Administration

                                       28
<PAGE>   29

                The Company or the Warrant Agent by notice to the other may
designate additional or different addresses for subsequent notices or
communications.

                Any notice or communication mailed to a Holder shall be mailed
to the Holder at the Holder's address as it appears on the Certificate Register
and shall be sufficiently given if so mailed within the time prescribed.

                Failure to mail a notice or communication to a Holder or any
defect in it shall not affect its sufficiency with respect to other Holders. If
a notice or communication is mailed in the manner provided above, it is duly
given, whether or not the addressee receives it.

                SECTION 8.6. Governing Law. The laws of the State of New York
shall govern this Agreement and the Warrants.

                SECTION 8.7. Successors. All agreements of the Company in this
Agreement and the Warrant Certificates shall bind its successors. All agreements
of the Warrant Agent in this Agreement shall bind its successors.

                SECTION 8.8. Multiple Originals. The parties may sign any number
of copies of this Agreement. Each signed copy shall be an original, but all of
them together represent the same agreement. One signed copy is enough to prove
this Agreement.

                SECTION 8.9. Table of Contents. The table of contents and
headings of the Articles and Sections of this Agreement have been inserted for
convenience of reference only, are not intended to be considered a part hereof
and shall not modify or restrict any of the terms or provisions hereof.

                SECTION 8.10. Severability. The provisions of this Agreement are
severable, and if any clause or provision shall be held invalid, illegal or
unenforceable in whole or in part in any jurisdiction, then such invalidity or
unenforceability shall affect in that jurisdiction only such clause or
provision, or part thereof, and shall not in any manner affect such clause or
provision in any other jurisdiction or any other clause or provision of this
Agreement in any jurisdiction.

                IN WITNESS WHEREOF, the parties have caused this Agreement to be
duly executed as of the date first written above.

                                           METRICOM, INC.

                                        by
                                           Name:
                                           Title:

                                           [WARRANT AGENT]

                                           as Warrant Agent

                                        by
                                           Name:
                                           Title:

                                       29
<PAGE>   30

                                                                       EXHIBIT A

                       FORM OF FACE OF WARRANT CERTIFICATE

                [UNTIL THE SEPARATION DATE (AS DEFINED), THIS NOTE HAS BEEN
ISSUED AS, AND MUST BE TRANSFERRED AS, A UNIT TOGETHER WITH THE ASSOCIATED
WARRANTS TO PURCHASE COMMON STOCK OF THE COMPANY. EACH UNIT CONSISTS OF $1,000
PRINCIPAL AMOUNT OF NOTES AND A WARRANT TO PURCHASE _________ SHARES OF COMMON
STOCK OF THE COMPANY, SUBJECT TO ADJUSTMENT UNDER CERTAIN CIRCUMSTANCES. A COPY
OF THE WARRANT AGREEMENT PURSUANT TO WHICH THE WARRANTS HAVE BEEN ISSUED IS
AVAILABLE FROM THE COMPANY UPON REQUEST.](2)

                [UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED
REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY ("DTC"), TO THE COMPANY OR ITS
AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE
ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR SUCH OTHER NAME AS IS
REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO
CEDE & CO., OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED
REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR
OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER
HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

                TRANSFERS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS
IN WHOLE, BUT NOT IN PART, TO NOMINEES OF DTC OR TO A SUCCESSOR THEREOF OR SUCH
SUCCESSOR'S NOMINEE AND TRANSFERS OF PORTIONS OF THIS GLOBAL SECURITY SHALL BE
LIMITED TO TRANSFERS MADE IN ACCORDANCE WITH THE RESTRICTIONS SET FORTH IN THE
WARRANT AGREEMENT REFERRED TO HEREIN.](3)

                [THE EXERCISE OF THIS WARRANT (AND THE OWNERSHIP OF COMMON STOCK
ISSUABLE UPON THE EXERCISE THEREOF) MAY BE LIMITED BY METRICOM, INC. IN ORDER TO
ENSURE COMPLIANCE WITH THE RULES, REGULATIONS AND POLICIES OF THE FEDERAL
COMMUNICATIONS COMMISSION, AND THIS WARRANT WILL NOT BE EXERCISABLE BY ANY
HOLDER IF SUCH EXERCISE WOULD CAUSE METRICOM, INC. TO BE IN VIOLATION OF THE
COMMUNICATIONS ACT OF 1934 OR THE RULES, REGULATIONS AND POLICIES OF THE FEDERAL
COMMUNICATIONS COMMISSION.]

--------------------
(2)   To be included on Warrants issued before the Separation Date.
(3)   To be included on Global Warrants.

                                       30
<PAGE>   31

No.     Certificate for _____ Warrants

        WARRANTS TO PURCHASE COMMON STOCK OF METRICOM, INC.

                THIS CERTIFIES THAT __________, or its registered assigns, is
the registered holder of the number of Warrants set forth above (the
"Warrants"). Each Warrant entitles the holder thereof (the "Holder"), at its
option and subject to the provisions contained herein and in the Warrant
Agreement referred to below, to purchase from Metricom, Inc., a Delaware
corporation (the "Company"), _______ shares of Common Stock, par value of $0.01
per share, of the Company (the "Common Stock") at the per share exercise price
of $_____ (the "Exercise Price"), or by Cashless Exercise referred to below.
This Warrant Certificate shall terminate and become void as of the close of
business on __________, ______ (the "Expiration Date") or upon the exercise
hereof as to all the shares of Common Stock subject hereto. The number of shares
issuable upon exercise of the Warrants and the Exercise Price per share shall be
subject to adjustment from time to time as set forth in the Warrant Agreement.

                This Warrant Certificate is issued under and in accordance with
a Warrant Agreement dated as of _____________ (the "Warrant Agreement"), between
the Company and ______________ (the "Warrant Agent", which term includes any
successor Warrant Agent under the Warrant Agreement), and is subject to the
terms and provisions contained in the Warrant Agreement, to all of which terms
and provisions the Holder of this Warrant Certificate consents by acceptance
hereof. The Warrant Agreement is hereby incorporated herein by reference and
made a part hereof. Reference is hereby made to the Warrant Agreement for a full
statement of the respective rights, limitations of rights, duties and
obligations of the Company, the Warrant Agent and the Holders of the Warrants.
Capitalized terms used but not defined herein shall have the meanings ascribed
thereto in the Warrant Agreement. A copy of the Warrant Agreement may be
obtained for inspection by the Holder hereof upon written request to the Warrant
Agent at Bank One Trust Company, N.A., One North State Street, 9th Floor,
Chicago, Illinois 60602, Telecopy No.: 312-407-1708, Attention: Corporate Trust
Administration.

                Subject to the terms of the Warrant Agreement, the Warrants may
be exercised in whole or in part (i) by presentation of this Warrant Certificate
with the Election to Purchase attached hereto duly executed and with the
simultaneous payment of the Exercise Price in cash (subject to adjustment) to
the Warrant Agent for the account of the Company at the office of the Warrant
Agent or (ii) by Cashless Exercise. Payment of the Exercise Price in cash shall
be made by certified or official bank check payable to the order of the Company
or by wire transfer of funds to an account designated by the Company for such
purpose. Payment by Cashless Exercise shall be made without the payment of cash
by reducing the amount of Common Stock that would be obtainable upon the
exercise of a Warrant and payment of the Exercise Price in cash so as to yield a
number of shares of Common Stock upon the exercise of such Warrant equal to the
product of (1) the number of shares of Common Stock for which such Warrant is
exercisable as of the Exercise Date (if the Exercise Price were being paid in
cash) and (2) a fraction, the numerator of which is the excess of the Current
Market Value per share of Common Stock on the Exercise

                                       31
<PAGE>   32

Date over the Exercise Price per share as of the Exercise Date and the
denominator of which is the Current Market Value per share of the Common Stock
on the Exercise Date.

        This Warrant requires the Holder to comply with certain certification
and opinion delivery requirements under certain circumstances in order to
validly exercise the Warrant.

                As provided in the Warrant Agreement and subject to the terms
and conditions therein set forth, the Warrants shall be exercisable at any time
on or after ____________, ____; provided, however, that no Warrant shall be
exercisable after ____________, _____. This Warrant is entitled to the benefit
of certain registration rights contained in the Warrant Agreement.

                In the event the Company enters into a Combination, the Holder
hereof will be entitled to receive upon exercise of the Warrants the kind and
amount of shares of capital stock or other securities or other property of such
surviving entity as the Holder would have been entitled to receive upon or as a
result of the combination had the Holder exercised its Warrants immediately
prior to such Combination; provided, however, that in the event that, in
connection with such Combination, consideration to holders of Common Stock in
exchange for their shares is payable solely in cash or in the event of the
dissolution, liquidation or winding-up of the Company, the Holder hereof will be
entitled to receive such cash distributions as the Holder would have received
had the Holder exercised its Warrants immediately prior to such Combination,
less the Exercise Price.

                As provided in the Warrant Agreement, the number of shares of
Common Stock issuable upon the exercise of the Warrants and the Exercise Price
are subject to adjustment upon the happening of certain events.

                The Company may require payment of a sum sufficient to pay all
taxes, assessments or other governmental charges in connection with the transfer
or exchange of the Warrant Certificates pursuant to Section 2.6 of the Warrant
Agreement, but not for any exchange or original issuance (not involving a
transfer) with respect to temporary Warrant Certificates, the exercise of the
Warrants or the issuance of the Warrant Shares.

                Upon any partial exercise of the Warrants, there shall be
countersigned and issued to the Holder hereof a new Warrant Certificate
representing those Warrants which were not exercised. This Warrant Certificate
may be exchanged at the office of the Warrant Agent by presenting this Warrant
Certificate properly endorsed with a request to exchange this Warrant
Certificate for other Warrant Certificates evidencing an equal number of
Warrants. No fractional Warrant Shares will be issued upon the exercise of the
Warrants, but the Company shall pay an amount in cash equal to the Current
Market Value per Warrant Share on the day immediately preceding the date the
Warrant is exercised, multiplied by the fraction of a Warrant Share that would
be issuable on the exercise of any Warrant.

                                       32
<PAGE>   33

                All shares of Common Stock issuable by the Company upon the
exercise of the Warrants shall, upon such issue, be duly and validly issued and
fully paid and non-assessable.

                The holder in whose name the Warrant Certificate is registered
may be deemed and treated by the Company and the Warrant Agent as the absolute
owner of the Warrant Certificate for all purposes whatsoever and neither the
Company nor the Warrant Agent shall be affected by notice to the contrary.

                The Warrants do not entitle any holder hereof to any of the
rights of a shareholder of the Company.

                This Warrant shall be governed by the laws of the State of New
York.

                This Warrant Certificate shall not be valid or obligatory for
any purpose until it shall have been countersigned by the Warrant Agent.

                                            METRICOM, INC.

                                        By

                                        By

DATED:

Countersigned:

--------------------------
as Warrant Agent,

By:  Authorized Signatory

                                       33
<PAGE>   34

                   FORM OF ELECTION TO PURCHASE WARRANT SHARES
                 (to be executed only upon exercise of Warrants)
                                 METRICOM, INC.

                The undersigned hereby irrevocably elects to exercise Warrants
at an exercise price per Warrant (subject to adjustment) of $______ to acquire
_____ shares of Common Stock, par value $0.01 per share, of Metricom, Inc. on
the terms and conditions specified within the Warrant Certificate and the
Warrant Agreement therein referred to, surrenders this Warrant Certificate and
all right, title and interest therein to Metricom, Inc. and directs that the
shares of Common Stock deliverable upon the exercise of such Warrants be
registered or placed in the name and at the address specified below and
delivered thereto.

Date:____________, _____

                                        ----------------------------------------
                                        (Signature of Owner)

                                        ----------------------------------------
                                        (Street Address)

                                        ----------------------------------------
                                        (City)        (State)    (Zip Code)

                                        Signature Guaranteed by:

                                        ----------------------------------------
                                        Signature must be guaranteed by an
                                        eligible Guarantor Institution (banks,
                                        stock brokers, savings and loan
                                        associations and credit unions)
                                        with membership in an approved
                                        guarantee medallion program
                                        pursuant to Securities and
                                        Exchange Commission
                                        Rule 17Ad-5

--------------------------
     The signature must correspond with the name as written upon the face of the
     within Warrant Certificate in every particular, without alteration or
     enlargement or any change whatsoever, and must be guaranteed.

                                       34
<PAGE>   35

Securities and/or check to be issued to:

Please insert social security or identifying number:

         Name:
              --------------------------------------------

         Street Address:
                        ----------------------------------

         City, State and Zip Code:
                                  ------------------------

Any unexercised Warrants represented by the Warrant Certificate to be issued to:
         Please insert social security or identifying number:

         Name:
              --------------------------------------------

         Street Address:
                        ----------------------------------

                City, State and Zip Code:
                                         ------------------------

                                       35
<PAGE>   36

                                   APPENDIX A

                            LIST OF FINANCIAL EXPERTS
                                ----------------

BT Alex. Brown
Bear, Stearns & Co., Inc.
Chase Securities Inc.
Credit Suisse First Boston Corporation
Donaldson, Lufkin & Jenrette Securities Corporation
ING Baring (U.S.) Securities Corporation
Goldman, Sachs & Co.
Lazard Freres & Co.
Lehman Brothers Inc.
Merrill Lynch, Pierce, Fenner & Smith Incorporated
Morgan Stanley, Dean Witter & Co. Incorporated
Oppenheimer & Co., Inc.
Prudential Securities Inc.
Salomon Smith Barney Inc.
SBC Warburg Dillon Read Inc.

                                       36

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