As filed with the Securities and Exchange Commission on November 20, 2000
Registration No. 333-44926

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549 POST-EFFECTIVE AMENDMENT NO. 1 ON
FORM S-8
TO FORM S-4
REGISTRATION STATEMENT
UNDER THE SECURITIES ACT OF 1933

OPENWAVE SYSTEMS INC.
(Exact Name of Registrant as Specified in Its Charter)
             Delaware                                94-3219054
  (State or Other Jurisdiction of       (I.R.S. Employer Identification No.)
  Incorporation or Organization)


800 Chesapeake Drive
Redwood City, California 94063
(650) 562-0200
(Address, Including Zip Code, and Telephone Number,
Including Area Code, of Principal Executive Offices)

Software.com, Inc. 1995 Stock Plan
Software.com, Inc. 2000 Nonstatutory Stock Option Plan
Software.com, Inc. 1999 Employee Stock Purchase Plan
At Mobile.com, Inc. Amended and Restated 1997 Stock Option Plan
bCandid Corporation 1999 Equity Incentive Plan
Mobility.Net Corporation 1999 Stock Option Plan
Options under Stock Option Agreements
(Full Titles of the Plans)

Donald J. Listwin
President and Chief Executive Officer
Openwave Systems Inc.
800 Chesapeake Drive
Redwood City, California 94063
(Name, address, including zip code, and telephone number, including area code,
of agent for service)

Copy To:

Kenton J. King, Esq.
Skadden, Arps, Slate, Meagher & Flom LLP
525 University Avenue, Ste. 220
Palo Alto, California 94301
(650) 470-4500


CALCULATION OF REGISTRATION FEE

===============================================================================================================
                                         Amount to       Proposed           Proposed
                                            be           Maximum            Maximum          Amount of
        Title of Securities to be        Registered   Offering Price        Aggregate       Registration
                Registered                  (1)       Per Share (2)    Offering Price (2)     Fee (2)
---------------------------------------------------------------------------------------------------------------
Software.com, Inc.                        6,661,302         (2)                (2)               (2)
1995 Stock Plan
Common Stock,
par value $0.001 per share
--------------------------------------------------------------------------------------------------------
Software.com, Inc.                        3,258,214         (2)                (2)               (2)
2000 Nonstatutory Stock Option Plan
Common Stock,
par value $0.001 per share
--------------------------------------------------------------------------------------------------------
Software.com, Inc.                        1,060,060         (2)                (2)               (2)
1999 Employee Stock Purchase Plan
Common Stock,
par value $0.001 per share
--------------------------------------------------------------------------------------------------------
At Mobile.com, Inc.                         409,808         (2)                (2)               (2)
Amended and Restated 1997 Stock
Option Plan
Common Stock,
par value $0.001 per share
--------------------------------------------------------------------------------------------------------
bCandid Corporation                          64,526         (2)                (2)               (2)
1999 Equity Incentive Plan
Common Stock,
par value $0.001 per share
--------------------------------------------------------------------------------------------------------
Mobility.Net Corporation                     15,400         (2)                (2)               (2)
1999 Stock Option Plan
Common Stock,
par value $0.001 per share
--------------------------------------------------------------------------------------------------------
Stock Option Agreements, dated            1,050,851         (2)                (2)               (2)
September 25, 1998 and November 20,
1998, between Software.com, Inc. and
John MacFarlane.
--------------------------------------------------------------------------------------------------------

(1) These shares were originally registered on the Registration Statement on Form S-4 to which this amendment relates.

(2) Not applicable. All filing fees payable in connection with the registration of these securities were paid in connection with the registration of 94,506,060 shares of the Registrant's common stock pursuant to a Registration Statement on Form S-4 (No. 333-44926) initially filed with the Securities and Exchange Commission on August 31, 2000.


In addition pursuant to pursuant to Rule 416(c) under the Securities Act, this registration statement also covers an indeterminate amount of interests to be offered or sold pursuant to the employee benefit plan(s) described herein.

The registration statement will become effective upon filing in accordance with Rule 462(a) under the Securities Act.


INTRODUCTORY STATEMENT

Openwave Systems Inc. hereby amends its Registration Statement on Form S-4 (No. 333-44926) (the "Form S-4") by filing this Post-Effective Amendment No. 1 on Form S-8 (the "Post-Effective Amendment") relating to the sale of up to 12,520,161 shares of common stock, par value $0.001 per share, of the Registrant ("Registrant Common Stock") issuable upon the exercise of stock options granted under the Software.com, Inc. 1999 Stock Plan, Software.com, Inc. 2000 Nonstatutory Stock Option Plan, Software.com, Inc. 1999 Employee Stock Purchase Plan, At Mobile.com Corporation Amended and Restated 1997 Stock Option Plan, bCandid Corporation 1999 Equity Incentive Plan, Mobility.Net Corporation 1999 Stock Option Plan, Stock Option Agreement, between Software.com, Inc. and John MacFarlane and Stock Option Agreement, between Software.com, Inc. and John MacFarlane (collectively, the "Plans").

The designation of the Post-Effective Amendment as Registration No. 333-44926 denotes that the Post-Effective Amendment relates only to the shares of Registrant Common Stock issuable on the exercise of stock options under the Plan and that this is the first Post-Effective Amendment to the Form S-4 filed with respect to such shares.

PART I

Item 1. Plan Information*

Item 2. Registrant Information and Employee Plan Annual Information*

* The document(s) containing the information specified in Part I of Form S-8 have been or will be sent or given to employees as specified by Rule 428(b)(1) under the Securities Act.

PART II

INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

Item 3. Incorporation of Documents by Reference

The Securities and Exchange Commission requires us to "incorporate by reference" certain of our publicly-filed documents into this prospectus, which means that information included in those documents is considered part of the prospectus. Information that we file with the SEC after the effective date of this prospectus will automatically update and supersede this information. We incorporate by reference the documents listed below and future filings made with the SEC under Sections 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act of 1934, as amended until we terminate the effectiveness of this registration statement.

3

The following documents filed with the SEC are hereby incorporated by reference:

(a) Our Annual Report on Form 10-K405 filed with the SEC on August 31, 2000 (No. 000-25687).

(b) Our Quarterly Report on Form 10-Q for the three months ended September 30, 2000 filed with the SEC on November 14, 2000.

(c) Our Current Report on Form 8-K filed with the SEC on November 3, 2000, and our Current Report on Form 8-K filed with the SEC on August 17, 2000.

(d) The descriptions of our Common Stock contained in our Registration Statement on Form 8-A12G filed with the SEC on April 1, 1999 (No. 333-75219) and our Registration Statement on Form 8-A12B filed with the SEC on August 17, 2000.

Item 4. Description of the Securities

Not applicable.

Item 5. Interests of Named Experts and Counsel

Not applicable.

Item 6. Indemnification of Directors and Officers

Our Amended and Restated Certificate of Incorporation reduces the liability of a director to the corporation or its stockholders for monetary damages for breaches of his or her fiduciary duty of care to the fullest extent permissible under Delaware law. Our Amended and Restated By-laws further provide for indemnification of corporate agents to the maximum extent permitted by the Delaware General Corporation Law. In addition, we have entered into indemnification agreements with our officers and directors.

Item 7. Exemption from Registration Claimed

Not applicable.

Item 8. Exhibits

See Index to Exhibits.

Item 9. Undertakings

4

The undersigned Registrant hereby undertakes:

1. To file, during any period in which offers or sales are being made, a post-effective amendment to this Registration Statement:

(i) To include any prospectus required by section 10(a)(3) of the Securities Act;

(ii) To reflect in the prospectus any facts or events arising after the effective date of the Registration Statement (or the most recent post- effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in the Registration Statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the SEC pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than a 20 percent change in the maximum aggregate offering price set forth in the "Calculation of Registration Fee" table in the effective Registration Statement.

(iii) To include any material information with respect to the plan of distribution not previously disclosed in the Registration Statement or any material change to such information in the Registration Statement;

2. That, for the purpose of determining any liability under the Securities Act, each such post-effective amendment shall be deemed to be a new Registration Statement relating to the securities offered herein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

3. To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering.

4. The undersigned registrant hereby undertakes that, for purposes of determining any liability under the Securities Act of 1933, each filing of the registrant's annual report pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (and, where applicable, each filing of an employee benefit plan's annual report pursuant to Section 15(d) of the Securities Exchange Act of 1934) that is incorporated by reference in the registration statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

5. Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons of the Registrant pursuant to the foregoing provisions, or otherwise, the Registrant has been advised that in the opinion of the SEC such indemnification is against public policy as expressed in the Securities Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the

5

payment by the Registrant of expenses incurred or paid by a director, officer or controlling person of the Registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the Registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue.

6

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in Redwood City, State of California, on November 17, 2000.

By:            /s/ Alan Black
    _________________________________________
                   Alan Black
   Senior Vice President, Corporate Affairs,
     Chief Financial Officer and Treasurer

Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has been signed by the following persons in the capacities indicated on November 17, 2000.

           SIGNATURE                                 TITLE
           ---------                                 -----

   /s/ Donald J. Listwin
______________________________
       Donald J. Listwin        President, Chief Executive Officer and Director
                                         (principal executive officer)

   /s/ Alain Rossmann
______________________________
       Alain Rossmann                Chairman of the Board, Executive Vice
                                       President, Secretary and Director

   /s/ Alan Black
______________________________
       Alan Black               Senior Vice President, Corporate Affairs, Chief
                                        Financial Officer and Treasurer
                                  (principal financial and accounting officer)

   /s/ Roger Evans
______________________________
       Roger Evans                                  Director


   /s/ John MacFarlane
______________________________
       John MacFarlane               Executive Vice President and Director


   /s/ Andrew Verhalen
______________________________
       Andrew Verhalen                              Director


   /s/ Bernard Puckett
______________________________
       Bernard Puckett                              Director

7

EXHIBIT INDEX

Exhibit
Number

5.1*   Opinion of Skadden, Arps, Slate, Meagher and Flom LLP

23.1*  Consent of Skadden, Arps, Slate, Meagher and Flom LLP
       (included in Exhibit 5.1)

23.2*  Consent of KPMG LLP, independent auditors, with respect to Phone.com,
       Inc.

23.3*  Consent of Ernst & Young, LLP, independent auditors, with respect to
       Software.com, Inc., Telarc, Inc. and bCandid Corporation.

23.4*  Consent of PricewaterhouseCoopers, independent auditors, with respect to
       the WAP business of APiON.

23.5*  Consent of Ernst & Young LLP, independent auditors, with respect to
       AtMotion, Inc.

23.6*  Consent of Ernst & Young, independent auditors, with respect to Paragon
       Software (Holdings) Limited.

23.7*  Consent of Ernst & Young LLP, independent auditors, with respect to
       Onebox.com, Inc.

23.8*  Consent of KPMG LLP, independent auditors, with respect to Highwind
       Software, Inc.

24.1*  Power of Attorney

________________________

* Filed herewith.


Exhibit 5.1

November 20, 2000

Phone.com, Inc.
800 Chesapeake Drive
Redwood City, California 94063

Re: Registration Statement on Form S-8 of Phone.com, Inc.

Ladies and Gentlemen:

We have acted as special counsel to Phone.com, Inc., a Delaware corporation (the "Company"), in connection with the proposed issuance by the Company of up to 12,520,161 shares of common stock, par value $0.001 per share of the Company (the "Shares"), pursuant to the Software.com, Inc. 1995 Stock Plan, the Software.com, Inc. 2000 Nonstatutory Plan, the Software.com, Inc. 1999 Employee Stock Purchase Plan, the At Mobile.com, Inc. Amended and Restated 1997 Stock Option Plan, the bCandid Corporation 1999 Equity Incentive Plan, the Mobility.Net Corporation 1999 Stock Option Plan and Stock Option Agreements, dated September 25, 1998 and November 20, 1998, between Software.com, Inc. and John MacFarlane (collectively the "Plans").

This opinion is delivered in accordance with the requirements of Item 601(b)(5) of Regulation S-K under the Securities Act of 1933, as amended (the "Securities Act").

In connection with this opinion, we have examined and are familiar with originals or copies, certified or otherwise identified to our satisfaction, of
(i) the Company's Post-Effective Amendment No. 1 on Form S-8 to the registration statement on Form S-4, relating to the Shares, filed with the Securities and Exchange Commission (the "Commission") under the Securities Act on November 20, 2000 (together with all exhibits thereto the "Registration Statement"), (ii) the Amended and Restated Certificate of Incorporation of the Company, as currently in effect, (iii) the Amended and Restated By-Laws of the Company, as currently in effect, (iv) the form of common stock certificate as filed with the Securities Exchange Commission as an exhibit to Form S-1A, on May 24, 1999 (the "Form of Common Stock Certificate"), (v) the Plans; and (vi) the forms of option agreement between the Company and the employees, directors and officers receiving options (the "Option Agreements"). We have also examined originals or copies, certified or otherwise identified to our satisfaction, of such records of the Company and such agreements, certificates of officers or other representatives of the Company and others, and such other documents, certificates and records as we have deemed necessary or appropriate as a basis for the opinions set forth herein.

In our examination, we have assumed the legal capacity of all natural persons, the genuineness of all signatures, the authenticity of all documents submitted to us as originals, the conformity to original documents of all documents submitted to us as certified or photostatic


copies and the authenticity of the originals of such latter documents. In making our examination of documents executed or to be executed by parties other than the Company, we have assumed that such parties had the power, corporate or other, to enter into and perform all obligations thereunder and have also assumed the due authorization by all requisite action, corporate or other, and execution and delivery by such parties of such documents and the validity and binding effect thereof. We have further assumed (i) that each of the Option Agreements to be entered into between the Company and the employees, directors and officers receiving options under the Plans will conform to the applicable form of agreement examined by us, (ii) that no options will be granted under the Plans with exercise prices below the then par value of the Shares and (iii) that no adjustment to the exercise price of any option will result in a reduction of the price per Share issuable upon the exercise of any option to a price below the par value of the Shares at the time of exercise. As to any facts material to the opinions expressed herein which we have not independently established or verified, we have relied upon oral or written statements and representations of officers and other representatives of the Company and others.

Members of our firm are admitted to the Bar in the State of California, and we do not express any opinion as to the laws of any other jurisdiction other than the General Corporation Law of the State of Delaware to the extent specifically referred to herein.

Based upon and subject to the foregoing, we are of the opinion that the Shares to be issued under the Plans have been duly authorized, and, when the Shares have been issued, delivered and paid for upon exercise of options duly granted pursuant to the terms of the Plans and the Option Agreements, and the Form of Common Stock Certificate representing Shares has been manually signed by an authorized officer of the transfer agent and registrar for the Shares and registered by such transfer agent and registrar, such Shares will be validly issued, fully paid and nonassessable.

We hereby consent to the filing of this opinion with the Commission as Exhibit 5.1 to the Registration Statement. In giving such consent, we do not thereby admit that we are included in the category of persons whose consent is required under Section 7 of the Securities Act.

Very truly yours,

/s/ Skadden, Arps, Slate, Meagher & Flom LLP


Exhibit 23.2

CONSENT OF KPMG LLP, INDEPENDENT AUDITORS

We consent to incorporation herein by reference of our report dated July 19, 2000, except as to Note 9, which is as of September 8, 2000, and Note 10, which is as of September 18, 2000, relating to the consolidated balance sheets of Phone.com, Inc. and subsidiaries as of June 30, 1999 and 2000, and the related consolidated statements of operations, stockholders' equity and comprehensive loss, and cash flows for each of the years in the three-year period ended June 30, 2000, which report appears in the registration statement (No. 333-44926) on Form S-4/A of Phone.com, Inc. We also consent to incorporation herein by reference of our report dated July 19, 2000, except as to Note 10, which is as of August 11, 2000, relating to the consolidated balance sheets of Phone.com, Inc. and subsidiaries as of June 30, 1999 and 2000, and the related consolidated statements of operations, stockholders' equity and comprehensive loss, and cash flows for each of the years in the three-year period ended June 30, 2000, which report appears in the June 30, 2000 Annual Report on Form 10-K of Phone.com, Inc.

                                         /s/ KPMG LLP

Mountain View, California
November 17, 2000


EXHIBIT 23.3

Consent of Ernst & Young LLP, Independent Auditors

We consent to the incorporation by reference in the Registration Statement (Form S-8) pertaining to the registration of 6,661,302 shares of common stock under the Software.com, Inc. 1995 Stock Plan, 3,258,214 shares of common stock under the Software.com, Inc. 2000 Nonstatutory Stock Option Plan, 1,060,060 shares of common stock under the Software.com, Inc. 1999 Employee Stock Purchase Plan, 409,808 shares of common shares under the At Mobile.com, Inc. Amended and Restated 1997 Stock Option Plan, 64,526 shares of common shares under the bCandid Corporation 1999 Equity Incentive Plan, 15,400 shares of common shares under the Mobility.Net Corporation 1999 Stock Option Plan and 1,050,851 shares of common shares under the Stock Option Agreements, dated September 25, 1998 and November 20, 1998, between Software.com, Inc. and John MacFarlane of our report dated July 12, 2000, with respect to the consolidated financial statements of Software.com, Inc., and of our report dated December 27, 1999, with respect to the consolidated financial statements of Telarc, Inc. and of our report dated August 25, 2000, with respect to the consolidated financial statements of bCandid Corporation, all included in the Registration Statement (Form S-4 No. 333-44926) as amended and related joint proxy statement/prospectus of Phone.com filed with the Securities Exchange Commission on August 31, 2000, which is incorporated herein by reference.

                                          /s/  Ernst & Young LLP

Woodland Hills, California


November 17, 2000


Exhibit 23.4

Private & Confidential
The Board of Directors of
Phone.com, Inc.
800 Chesapeake Drive
Redwood City
CA 94063

CONSENT OF PRICEWATERHOUSECOOPERS INDEPENDENT AUDITORS

Dear Sirs

We consent to incorporation herein by reference of our report dated 26 October 1999 relating to the financial statements of the WAP Business of APiON, which report appears in the registration statement (No. 333-44926) on Form S-4 of Phone.com, Inc.

Yours faithfully

/s/ PricewaterhouseCoopers
PricewaterhouseCoopers


Exhibit 23.5

CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS

We consent to incorporation herein by reference of our report dated August 6, 1999, with respect to the financial statements of AtMotion Inc. which report appears in the registration statement (No. 333-44926) on Form S-4 of Phone.com, Inc.

                                         /s/ Ernst & Young LLP

San Jose, California
November 17, 2000


EXHIBIT 23.6

CONSENT OF ERNST & YOUNG, INDEPENDENT AUDITORS

We consent to incorporation herein by reference in the Registration Statement (Form S-8) pertaining to the option plans listed on the facing sheet thereof of our report dated May 12, 2000, with respect to the consolidated financial statements of Paragon Software (Holdings) Limited which report appears in the Registration Statement (No. 333-44926) on Form S-4 of Phone.com, Inc.

                                       /s/ Ernst & Young LLP

Reading, England


November 17, 2000


Exhibit 23.7

CONSENT OF ERNST & YOUNG, LLP INDEPENDENT AUDITORS

We consent to incorporation herein by reference of our report dated February 18, 2000, with respect to the financial statements of Onebox.com, Inc. which report appears in the registration statement (No. 333-44926) on Form S-4 of Phone.com, Inc.

                                    /s/ Ernst & Young LLP
                                    Ernst & Young LLP

San Jose, California
November 17, 2000


Exhibit 23.8

Consent of Independent Auditors

We consent to incorporation herein by reference of our report dated March 31, 2000, relating to the balance sheet of HighWind Software, Inc. as of December 31, 1998, and the related statements of operations, stockholders' deficit and cash flows for the year then ended, which report appears in the registration statement (No. 333-44926) on Form S-4 of Phone.com, Inc.

                         /s/ KPMG LLP
                         KPMG LLP

Boulder, Colorado
November 16, 2000


Exhibit 24.1

POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints Alan Black and Linda Speer, jointly and severally, his or her attorneys-in-fact and agents, each with the power of substitution and resubstitution, for him or her and in his or her name, place or stead, in any and all capacities, to sign any amendments to this Registration Statement on Form S-8, and to file such amendments, together with exhibits and other documents in connection therewith, with the Securities and Exchange Commission, granting to each attorney-in-fact and agent, full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully as he or she might or could do in person, and ratifying and confirming all that the attorneys-in-fact and agents, or his or her substitute or substitutes, may do or cause to be done by virtue hereof.

Pursuant to the requirement of the Securities Act of 1933, the undersigned has herein-to subscribed this power of attorney this 17th day of November, 2000.

            /s/ Donald J. Listwin
------------------------------------------------
                Donald J. Listwin

              /s/ Alain Rossmann
------------------------------------------------
                  Alain Rossmann

               /s/ Alan Black
------------------------------------------------
                   Alan Black

               /s/ Roger Evans
------------------------------------------------
                   Roger Evans

             /s/ Andrew Verhalen
------------------------------------------------
                 Andrew Verhalen

             /s/ John MacFarlane
------------------------------------------------
                 John MacFarlane

             /s/ Bernard Puckett
------------------------------------------------


                 Bernard Puckett