Approximate date of commencement of proposed sale to the public: Not applicable.

     If the only securities being registered on this Form are being offered pursuant to dividend or interest reinvestment plans, please check the following box. o

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     If this Form is a post-effective amendment to a registration statement filed pursuant to General Instruction I.C. filed to register additional securities or additional classes of securities pursuant to Rule 413(b) under the Securities Act, check the following box. o

     This Post-Effective Amendment No. 1 relates to the Registration Statement on Form F-3 (Registration No. 333-142684) (the “Registration Statement”) of Zi Corporation (the “Company”).

     On April 9, 2009, pursuant to the terms of an Arrangement Agreement, dated as of February 26, 2009, by and among the Company, Nuance Communications, Inc. (“Nuance”), and Nuance Acquisition ULC, an unlimited liability corporation existing under the laws of the Province of Alberta and an indirect wholly owned subsidiary of Nuance (“Sub”), the Company became a wholly owned subsidiary of Sub by way of a statutory plan of arrangement (the “Acquisition”). Pursuant to the Arrangement Agreement, each Zi common share outstanding prior to the Acquisition has been converted into the right to receive $0.34 in cash and approximately 0.037 shares of Nuance common stock.

     In connection with the Acquisition, the Company hereby removes from registration all of its securities registered pursuant to the Registration Statement that remain unissued.

     Pursuant to the requirements of the Securities Act of 1933, as amended, the registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form F-3 and has duly caused this amendment to its Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Burlington, Commonwealth of Massachusetts, on April 14, 2009.

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