Research In Motion Comments on Patent Complaint by Visto

Waterloo, Ontario - Research In Motion Limited (RIM) (Nasdaq: RIMM; TSX: RIM) today learned that a complaint alleging patent infringement has been filed in the U.S. Eastern District Court of Texas by Visto Corporation against RIM. Visto is alleging infringement of four patents (#6,023,708, #6,085,192, #6,151,606 and #6,708,221) and seeking an injunction and monetary damages.

Visto has already filed patent complaints against several companies in the industry, including Microsoft, Good Technology, Smartner and Sproqit. Visto filed its complaint against RIM immediately following a jury verdict in its litigation against Seven Networks.

RIM has been monitoring Visto’s litigation against other companies in the industry and, based on prior art and actual products in market, RIM believes Visto’s patents are invalid. Further, Visto’s patent claims as directed against Seven Networks refer to a different type of system than RIM’s technology. RIM believes it does not infringe Visto’s patents and will file its legal response in due course. In addition to challenging validity and infringement, RIM will now also consider asserting its own patents against Visto.

RIM is fully prepared and equipped to deal with the matter and will continue to disclose material information as it becomes available. RIM does not expect its customers to be impacted by Visto’s complaint and, given the status of Visto’s current litigation with other companies, it is unlikely that any material court proceedings in this litigation could begin prior to the middle of calendar 2007.

About Research In Motion (RIM)

Research In Motion is a leading designer, manufacturer and marketer of innovative wireless solutions for the worldwide mobile communications market. Through the development of integrated hardware, software and services that support multiple wireless network standards, RIM provides platforms and solutions for seamless access to time-sensitive information including email, phone, SMS messaging, Internet and intranet-based applications. RIM technology also enables a broad array of third party developers and manufacturers to enhance their products and services with wireless connectivity. RIM’s portfolio of award-winning products, services and embedded technologies are used by thousands of organizations around the world and include the BlackBerry® wireless platform, the RIM Wireless Handheld™ product line, software development tools, radio-modems and software/hardware licensing agreements. Founded in 1984 and based in Waterloo, Ontario, RIM operates offices in North America, Europe and Asia Pacific. RIM is listed on the Nasdaq Stock Market (Nasdaq: RIMM) and the Toronto Stock Exchange (TSX: RIM). For more information, visit www.rim.com or www.blackberry.com.

This news release contains forward-looking statements within the meaning of the U.S. Private Securities Litigation Reform Act of 1995 and applicable Canadian securities laws relating to RIM’s plans and expectations regarding Visto’s complaint against RIM. The terms and phrases “expects”, “believes”, “will”, “will now also consider”, “fully prepared and equipped” , “it is unlikely” and similar terms and phrases are intended to identify these forward-looking statements. Forward-looking statements are based on estimates and assumptions made by RIM in light of its experience and its perception of historical trends, current conditions and expected future developments, as well as other factors that RIM believes are appropriate in the circumstances. Such forward-looking statements are subject to a number of risks and uncertainties, including, in particular, the inherent uncertainty regarding the outcome of any litigation, and the risks and uncertainties and potential outcomes that are described in the risk factors titled “The Company May Infringe on the Intellectual Property Rights of Others” and the other risks described in the “Risk Factors” section of RIM’s Annual Information Form for fiscal 2005, which is included in its Annual Report on Form 40-F for fiscal 2005, and Management’s Discussion and Analysis of Financial Condition and Results of Operations for the three months and nine months ended November 27, 2005 (copies of which filings may be obtained at www.sedar.com or www.sec.gov). These factors should be considered carefully, and readers should not place undue reliance on RIM’s forward-looking statements. RIM has no intention and undertakes no obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.

Contact Information

Marisa Conway

Brodeur Worldwide (for RIM)

Research In Motion Limited (RIM)

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