Press Release

April 7, 2004

Research In Motion Announces Effective 2 for 1 Stock Split

Waterloo, ON - Research In Motion Limited (RIM) (Nasdaq: RIMM; TSX: RIM), a world leader in the mobile communications market, announced that its Board of Directors today approved a two-for-one stock split of the company's outstanding common shares. The two-for-one stock split will be implemented by way of a stock dividend whereby shareholders will receive one common share of the company for each common share held. The stock dividend will be payable on June 4, 2004 to common shareholders of record at the close of business on May 27, 2004. The total number of common shares outstanding as of February 28, 2004 was 92.4 million. Adjusting for the stock split, the total number of common shares outstanding will be 184.8 million.

Shareholders should retain their existing share certificates and not return their share certificates to the company's transfer agent. Share certificates representing the stock dividend will be mailed out on or about June 4, 2004 to registered shareholders as of the record date.

RIM is ascribing no monetary value to the stock dividend. Accordingly, there will be no tax payable by Canadian or U.S. shareholders as a result of the dividend. Shareholders are advised to contact their tax advisors for further information.

Further details and answers to shareholder questions relating to the stock split are available on RIM's website at http://www.rim.com/investors/faqs/index.shtml.

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.

Forward-looking statements in this news release are made pursuant to the "safe harbor" provisions of the U.S. Private Securities Litigation Reform Act of 1995. When used herein, the words "expect", "anticipate", "estimate", "may", "will", "should", "intend," "believe", and similar expressions, are intended to identify 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. Many factors could cause RIM's actual results, performance or achievements to differ materially from those expressed or implied by the forward-looking statements, including those described in the "Risk Factors" and "MD&A" sections of RIM's filings with the United States Securities and Exchange Commission and securities regulators in Canada. 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.

The BlackBerry and RIM families of related marks, images and symbols are the exclusive properties and trademarks of Research In Motion Limited. RIM, Research In Motion and BlackBerry are registered with the U.S. Patent and Trademark Office and may be pending or registered in other countries. All other brands, product names, company names, trademarks and service marks are the properties of their respective owners.