U.S. SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 4 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(f) of the Investment Company Act of 1940 [X] Check box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b). _______________________________________________________________________________ 1. Name and Address of Reporting Person* Waveland International, Ltd. ------------------------------------------------------------------------------- (Last) (First) (Middle) 227 West Monroe, Suite 4800 ------------------------------------------------------------------------------- (Street) Chicago Illinois 60606 ------------------------------------------------------------------------------- (City) (State) (Zip) _______________________________________________________________________________ 2. Issuer Name and Ticker or Trading Symbol CIDCO Incorporated (NASDAQ: CDCO) _______________________________________________________________________________ 3. IRS Identification Number of Reporting Person, if an Entity (Voluntary) _______________________________________________________________________________ 4. Statement for Month/Year December 2001 _______________________________________________________________________________ 5. If Amendment, Date of Original (Month/Year) _______________________________________________________________________________ 6. Relationship of Reporting Person to Issuer (Check all applicable) [_] Director [_] 10% Owner [_] Officer (give title below) [X] Other (specify below) * Former 10% holder ----------------- _______________________________________________________________________________ 7. Individual or Joint/Group Filing (Check applicable line) [_] Form filed by one Reporting Person [X] Form filed by more than one Reporting Person _______________________________________________________________________________ 1 of 4 =============================================================================== Table I -- Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned ===============================================================================

* If the Form is filed by more than one Reporting Person, see Instruction 4(b)(v). Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. (Print or Type Response) (Over) 2 of 4 FORM 4 (continued) Table II -- Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities) ===============================================================================

Explanation of Responses: WAVELAND INTERNATIONAL LTD. /s/ David S. Richter December 13, 2001 -------------------------------------------- ----------------------- **Signature of Reporting Person Date David S. Richter, President ** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a). Note: File three copies of this Form, one of which must be manually signed. If space provided is insufficient, see Instruction 6 for procedure. Page 3 of 4 ATTACHMENT Pursuant to Rules 16a-1(a)(3) and 16a-3(j) of the Securities Exchange Act of 1934 and General Instruction 4(b)(v) of Form 4, the undersigned hereby execute this attachment as joint filers with respect to the foregoing Statement of Changes in Beneficial Ownership (Statement for December 2001) regarding certain Common Shares of CIDCO Incorporated (NASDAQ: CDCO): WAVELAND INTERNATIONAL, LTD. 227 West Monroe, Suite 4800 Chicago, Illinois 60606 By: /s/ David S. Richter ----------------------------- David S. Richter, Director WAVELAND PARTNERS, L.P. 227 West Monroe, Suite 4800 Chicago, Illinois 60606 By: Waveland Capital Management, L.P. Its: General Partner By: Clincher Capital Corporation Its: General Partner By: /s/ David S. Richter ---------------------------- David S. Richter, President WAVELAND CAPITAL MANAGEMENT, L.P. 227 West Monroe, Suite 4800 Chicago, Illinois 60606 By: Clincher Capital Corporation Its: General Partner By: /s/ David S. Richter ---------------------------- David S. Richter, President CLINCHER CAPITAL CORPORATION 227 West Monroe, Suite 4800 Chicago, Illinois 60606 By: /s/ David S. Richter ----------------------------- David S. Richter, President WAVELAND PARTNERS, LTD. 227 West Monroe, Suite 4800 Chicago, Illinois 60606 By: /s/ David S. Richter --------------------------- David S. Richter, Director WAVELAND CAPITAL MANAGEMENT, LLC 227 West Monroe, Suite 4800 Chicago, Illinois 60606 By: /s/ David S. Richter -------------------------- David S. Richter, Manager Page 4 of 4

WAVELAND PARTNERS LP 4