Press Release

December 21, 2004

T-Mobile Deutschland Expands Its BlackBerry Offering

Waterloo, ON - T-Mobile Deutschland and Research In Motion (RIM) (Nasdaq: RIMM; TSX: RIM) announced an expanded offering of BlackBerry® products and services for customers in Germany today with T-Mobile’s introduction of BlackBerry Connect™, BlackBerry 7100t™, BlackBerry 7290™ and BlackBerry Enterprise Server™ v4.0.

Using RIM’s BlackBerry Connect™ technology, T-Mobile Deutschland will now support push-based BlackBerry email services on the T-Mobile MDA II in addition to RIM’s BlackBerry devices.   T-Mobile Deutschland is the first mobile operator to commercially launch BlackBerry Connect™ with a Windows Mobile-based device.

The BlackBerry service allows business and personal emails to be delivered automatically to the MDA II. Attachments such as Word files or PowerPoint presentations can also be opened and viewed. Corporate customers can also integrate the MDA II with BlackBerry Enterprise Server™, making further features available such as wireless calendar synchronization, wireless access to the company address book and advanced security with end-to-end encryption.

MDA II owners wishing to use the push-based BlackBerry email service can download the necessary software at www.t-mobile.de/blackberry/software. A CD-ROM is now also included when new devices are purchased. T-Mobile is currently planning to make the BlackBerry email service available for additional devices including the MDA III, MDA compact and Sony Ericsson P910 in the first quarter of 2005.

In addition to the introduction of BlackBerry Connect™, T-Mobile Deutschland is adding the BlackBerry 7100t™ and BlackBerry 7290™ to its BlackBerry portfolio. Both models have new and enhanced features including large, bright color screens and Bluetooth® support. The BlackBerry 7100t incorporates RIM’s innovative SureType™ keyboard technology and delivers the power of BlackBerry with the look and feel of a typical cell phone. The BlackBerry 7290 features a compact and ergonomic handheld design ideal for more intensive data use.   Both devices feature all the popular elements of existing BlackBerry devices including integrated support for push-based email, phone, text messaging, organizer, Internet and intranet applications.  Other new features include more memory (32 MB flash, 4 MB SRAM) and support for enhanced attachment viewing capabilities. Both devices also feature quad-band support for international roaming* and Bluetooth support enabling wireless connections with a car kit or headset. The BlackBerry 7100t and BlackBerry 7290 are available for both corporate and personal use.

BlackBerry Enterprise Sever software v4.0 is expected to be available from T-Mobile Deutschland in Q1 2005. New and enhanced features include the wireless synchronization of contacts, tasks and notes. Out-of-office, filter and auto-signature functions can also be modified wirelessly. Advanced Encryption Standard (AES) support is added and IT administrators will benefit from the option to centrally load handheld software. Furthermore, it is no longer necessary to install desktop software.

*Check with T-Mobile for roaming services.

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.

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.

The BlackBerry, SureType 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.