Press Release

June 1, 2001

BT Cellnet Extends Its Business GPRS Range With BlackBerry Wireless Email

Customers can now place advance orders for the highly-popular BlackBerry running over BT Cellnet's GPRS

BT Cellnet, the UK mobile business of BT wireless, today announced that Research In Motion's (RIM) (Nasdaq: RIMM; TSE: RIM) BlackBerry wireless email solution can now be ordered by corporate customers.

BlackBerry will run over BT Cellnet's GPRS, enabling users to be always connected to their business email account and to receive, read and respond to messages, wherever they are. BlackBerry is developed and manufactured by RIM and has already proved hugely popular in North America, where it was launched in 1999.

The Enterprise Edition of BlackBerry is the world's first complete, secure and integrated wireless email service developed for businesses. It uses unique 'push' technology that enables users to access emails automatically without the need to dial in. It also integrates with a user's existing email account so that there is no need for a second address.

In a deal with BT Cellnet, BlackBerry will run in the UK on the GPRS data network which runs alongside the existing GSM network. GPRS will enable BlackBerry users to stay connected to their corporate network all day.

BT Cellnet launched its GPRS network to corporate users in June 2000, and to consumers in May 2001. BlackBerry joins a growing range of GPRS services developed for the business market which deliver fast and an "always on"* connection for mobile workers.

"With BlackBerry, you are never away from your email," David McGlade, BT Cellnet's managing director, commented. "Many workers dread returning to the office after meetings, as unread emails can accumulate rapidly. With BlackBerry you can deal with them as they arrive, dealing immediately with urgent tasks and staying on top of work in progress."

Jim Balsillie, chairman and co-CEO for Research In Motion, said, "The combination of BlackBerry and BT Cellnet's GPRS network represents a landmark in the development of wireless email solutions for the UK market. With the growing trend towards mobile and flexible working, there is an increasing need for productivity tools such as BlackBerry that enable people to keep in touch and manage their growing email inbox."

About BT Cellnet

• Today BT Cellnet has approximately 11.2 million customers using its voice services including over 1.5 million customers with Mobile Internet enabled phone
• BT Cellnet is the UK arm of BT wireless
• www.btcellnet.net

About RIM

Research In Motion Limited is a leading designer, manufacturer and marketer of innovative wireless solutions for the mobile communications market. Through development and integration of hardware, software and services, RIM provides solutions for seamless access to time-sensitive information including email, messaging, Internet and intranet-based applications. RIM technology also enables a broad array of third party developers and manufacturers around the world to enhance their products and services with wireless connectivity. RIM's portfolio of award-winning products includes the RIM Wireless Handheld™ product line, the BlackBerry™ wireless email solution, embedded radio-modems and software development tools. Founded in 1984 and based in Waterloo, Ontario RIM operates offices in Canada, the United States and England. RIM is listed on the Nasdaq Stock Market and the Toronto Stock Exchange. For more information, visit www.rim.net. Investors may contact investor_relations@rim.net. Customers may contact info@rim.net.

About BlackBerry

Key Features of the BlackBerry Wireless Email Solution:

• Advanced wireless handhelds - slim and lightweight, embedded wireless modem (no external antenna needed), thumb-operated keyboard and trackwheel, large backlit screen and integrated email/organizer software.
• Single mailbox integration with corporate email systems - allows users to keep their existing email address and manage one single mailbox.
• Powerful email features - read, originate, forward, reply, delete or file messages using the wireless handheld (inbox and folders are synchronized between the wireless handheld and PC); user-selectable message filters allow user to control email flow.
• Full-featured connected organizer - includes calendar, address book, task list, memo pad, calculator and alarm; synchronizes with PC.
• 'Always On, Always Connected™'* - designed to operate 24 hours per day while remaining connected to the wireless network to allow easy notification of incoming email; uses "push model" of email delivery; email automatically finds the user; no dialing-in; no initiating connections; no effort required.
• End-to-end security - email is encrypted using Triple DES and remains encrypted at all points between the PC (or server) and wireless handheld; meets strict corporate security guidelines for company-confidential information.
• BlackBerry Enterprise Server - enterprise server software provides centralized management and control with a scalable architecture.
• End-to-end solution - customers receive easy-to-use wireless handhelds, productive desktop utilities, innovative server software and nationwide airtime on a leading network in one completely integrated solution.

* Subject to network coverage

Research In Motion, RIM, the RIM logo, BlackBerry Wireless Handheld, BlackBerry the BlackBerry logo and 'Always On, Always Connected' are trademarks of Research In Motion Limited. Research In Motion, RIM and 'Always On, Always Connected' are registered with the U.S. Patent and Trademark Office. 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 are made pursuant to the ``safe harbor'' provisions of the United States Private Securities Litigation Reform Act of 1995. Investors are cautioned that such forward-looking statements involve risks and uncertainties, including, without limitation, risks relating to possible product defects and product liability, risks related to international sales and potential foreign currency exchange fluctuations, continued acceptance of RIM's products, increased levels of competition, technological changes, dependence on intellectual property rights and other risks detailed from time to time in RIM's periodic reports filed with the United States Securities and Exchange Commission and other regulatory authorities.