AT&T Wireless Offers New Color-Screen BlackBerry® Handheld™

BlackBerry 7210™ includes high-resolution color screen and international roaming capabilities

Redmond, WA and Waterloo, ON - August 13, 2003 - Expanding its portfolio of BlackBerry® handhelds, AT&T Wireless is now offering customers the BlackBerry 7210 Wireless Handheld™ - a new color-screen handheld with international roaming capabilities. The new handheld developed by Research In Motion (RIM) (Nasdaq: RIMM; TSX: RIM) runs on AT&T Wireless' Next Generation GSM™/GPRS network, providing wireless phone, text messaging, email, Web browsing and organizer access in dozens of countries across the globe.

The BlackBerry 7210 Wireless Handheld provides customers with wireless access to their personal and corporate email, including attachments, for users of Microsoft® Outlook®, Lotus® Notes® and popular Internet Service Provider (ISP) email accounts. AT&T Wireless' extensive network of global roaming partners provides business travelers with the ability to check email in thirty-two countries and place phone calls in more than one hundred nations using the new BlackBerry handheld. The new BlackBerry 7210™ is priced at $449.99.

AT&T Wireless' data plans for BlackBerry handhelds start at only $39.99 per handheld per month, and optional voice calling plans start at only $19.99 per handheld per month. Customers can purchase the BlackBerry 7210 directly through AT&T Wireless' sales channels. Additional details can be found at www.attwireless.com/blackberry.

About AT&T Wireless

AT&T Wireless (NYSE: AWE) is the second-largest wireless carrier, based on revenues, in the United States. With 21.49 million subscribers as of June 30, 2003, and revenues of more than $16.2 billion over the past four quarters, AT&T Wireless delivers advanced high-quality mobile wireless communications services, voice and data, to businesses and consumers, in the U.S. and internationally. For more information, please visit us at http://www.attwireless.com/.

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 to data. 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.

This press release contains "forward-looking statements'' which are based on management's beliefs as well as on a number of assumptions concerning future events made by management with information that is currently available to management. Forward-looking statements may include, without limitation, management's expectations regarding: our future financial and operating performance and financial condition, including the company's outlook for the fiscal year 2003 and subsequent periods; subscriber growth; industry conditions; the strength of our balance sheet; our liquidity and needs for additional financing; and our ability to generate positive free cash flow.

Readers are cautioned not to put undue reliance on such forward-looking statements, which are not a guarantee of performance and are subject to a number of uncertainties and other factors, many of which are outside AT&T Wireless' control, that could cause actual results to differ materially from such statements. Without limitation these factors include: the risks associated with the implementation of our technology migration strategy, our ability to continue to reduce costs and increase the efficiency of our distribution channels, the potential competitive impacts of industry consolidation or alternative technologies, potential impacts on revenue and ARPU from competitive pricing and slowing penetration in the wireless industry, the effects of vigorous competition in the markets in which we operate, the risk of decreased consumer spending due to softening economic conditions, acts of terrorism, and consumer response to new service offerings. For a more detailed description of the factors that could cause such a difference, please see AT&T Wireless' filings with the Securities and Exchange Commission, including the information under the heading "Additional Factors That May Affect Our Business, Future Operating Results and Financial Condition" and "Forward Looking Statements" in its quarterly report on Form 10-Q filed on May 12, 2003.

Forward-looking statements in this news release are made pursuant to the "safe harbor" provisions of the United States Private Securities Litigation Reform Act of 1995. When used herein, words such as "intend" and similar expressions are intended to identify forward-looking statements. Forward-looking statements are based on assumptions made by and information available to Research In Motion Limited. 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. The Company has no intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.