Press Release

September 8, 2003

RIM Reports Preliminary Second Quarter Results

Revenue and Earnings Growth to Exceed Expectations

Waterloo, ON - Research In Motion Limited (RIM) (Nasdaq: RIMM; TSX: RIM), a world leader in the mobile communications market, today reported preliminary second quarter results for the period ended August 30, 2003 (all figures in U.S. dollars and U.S. GAAP).

Based on preliminary financial data, RIM expects revenue for the second quarter to be recorded in the range of $123-$126 million, exceeding the previously forecasted revenue range of $105-$115 million. Net income for the second quarter is also expected to exceed initial forecasts. Subject to final review, RIM now anticipates diluted earnings to be in the range of $0.02-$0.05 per share.

Excluding the patent litigation provision, RIM expects adjusted diluted earnings to be between $0.07- $0.11 per share. The adjusted earnings per share data does not have any standardized meaning prescribed by GAAP and is not comparable to similar measures presented by other issuers. The litigation provision is expected to be lower than the prior quarter, resulting from adjustments to previous estimates for professional fees and interest.

RIM expects the number of net new BlackBerry® subscribers in the quarter to be between 94,000-97,000, which exceeds the previously forecasted range of 80,000-90,000 for the quarter. The BlackBerry subscriber base will now exceed 700,000 subscribers.

"RIM's business generated higher than expected revenue during the summer months resulting in a record quarter. The top-line growth together with prudent expense management also allowed us to significantly exceed our profitability targets," said Dennis Kavelman, Chief Financial Officer at RIM. "Global demand for BlackBerry accelerated in both enterprise and prosumer market segments as RIM fulfilled orders to its carrier partners to satisfy new subscriber growth, hardware upgrade sales and retail channel expansion requirements."

RIM is scheduled to report final second quarter results and hold its quarterly earnings conference call on September 25, 2003 at 5:00 pm EST. The call can be accessed on the RIM website by logging in at www.rim.com/investors/events/index.shtml or by dialing 416-640-1907. A replay of the call is scheduled to be available from 7 pm EST on September 25th until midnight October 2, 2003 by dialing 416-640-1917 and entering passcode 21000721#.

About Research In Motion

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.

Research In Motion, RIM and BlackBerry are trademarks of Research In Motion Limited. Research In Motion and RIM are registered with the U.S. Patent and Trademark Office and may be pending or registered in other countries. All other brands, products and company names mentioned herein may be trademarks or registered trademarks of their respective holders.

Forward-looking statements in this news release regarding RIM's revenue and earnings expectations, as well as anticipated demand for RIM's handheld products, are made pursuant to the "safe harbor" provisions of the United States Private Securities Litigation Reform Act of 1995. Forward-looking statements are based on assumptions made by and information available to RIM. Investors are cautioned that such forward-looking statements involve risks and uncertainties. Important factors that could cause actual results to differ materially from those expressed or implied by such forward looking statements include, without limitation, possible product defects and product liability, risks related to international sales and potential foreign currency exchange fluctuations, the initiation or outcome of litigation, acts or potential acts of terrorism, international conflicts, significant fluctuations of quarterly operating results, changes in Canadian and foreign laws and regulations, continued acceptance of RIM's products, increased levels of competition, technological changes and the successful development of new products, dependence on third-party networks to provide services, dependence on intellectual property rights and other risks and factors detailed from time to time in RIM's periodic reports filed with the United States Securities and Exchange Commission, and other regulatory authorities. RIM has no intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.