Press Release

June 27, 2000

BT Cellnet and RIM To Introduce Advanced Wireless Email Solution To the UK

BlackBerry wireless email will operate over BT Cellnet's GPRS network

Waterloo, Ontario - BT Cellnet and Research In Motion Limited (RIM) announced today at Networks 2000 in the National Exhibition Centre in Birmingham that they will be working together to offer the BlackBerry™ wireless email solution to BT Cellnet corporate customers in the UK. BlackBerry will support both Microsoft® Exchange and Lotus Notes® environments and will operate over BT Cellnet's new GPRS (General Packet Radio Service) high speed network. Customer trials in the UK are expected to begin later this year.

BlackBerry is a complete, secure, integrated wireless email solution designed for mobile professionals. BlackBerry offers a proven, award-winning solution that features a unique wireless handheld device with a large screen, easy-to-use keyboard and embedded wireless modem. The BlackBerry solution combines the advanced wireless handheld with desktop PC utilities, enterprise server software and tight integration with wireless data networks such as BT Cellnet's new GPRS network. The GPRS standard and the BlackBerry solution were both designed to enable "always-on" operation and allow users to maintain a virtual connection to the wireless network. With BlackBerry, customers enjoy a completely integrated, secure, end-to-end solution that provides easy-to-use, mobile access to their corporate email system wherever they go. BlackBerry is already well-established in North America where it was introduced in 1999.

Peter Richardson, sales and marketing director of BT Cellnet, commented, "We are pleased to be the first mobile operator to introduce RIM's wireless email solutions to corporate customers. Mobile email connectivity and integration are vital for business users. The unique merits of BlackBerry demonstrate BT Cellnet's commitment to providing the best applications available to take advantage of the high speed GPRS network."

"The convergence of Internet and wireless technologies with business applications is an unmistakable trend that will fundamentally impact the way we work. BT Cellnet's decision to invest early in GPRS technology will pay dividends as customers recognise and embrace the potential of the wireless Internet," said Mike Lazaridis, president and Co-CEO at Research In Motion. "We look forward to working with BT Cellnet and its corporate customers to deploy proven wireless email solutions in the nearer term while continuously helping to drive the evolution of computing and communications technologies for the longer term."

NOTES TO EDITORS

About GPRS

GPRS is a new international wireless standard that is expected to profoundly alter and improve the data services available to GSM (Global System for Mobile telecommunications) networks and BT Cellnet is a world leader in the deployment of GPRS across its GSM network. GPRS uses existing GSM radio base stations and converts wireless data into standard Internet packets, enabling interoperability between the Internet and the GSM network. It is expected to enable data speeds up to ten times as fast as current PCS networks.

The GPRS method of transporting data optimizes network capacity by using bandwidth only when it is needed. In addition, several data transmissions from different users can share the same channel. The GPRS technology standard also supports fast point-to-point communication through wireless handhelds with long battery life designed to enable an "always on" Internet connection. The end result is next-generation technologies that will allow end-users to remain constantly connected and send and receive data faster and more cost-effectively.

About BlackBerry

Key Features of the BlackBerry Wireless Email Solution:

• Advanced wireless handhelds - slim and lightweight with large (16 or 20-line) screen, thumb-operated keyboard and trackwheel; embedded wireless modem (no external antenna needed), plus integrated email and 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 using docking cradle and Puma Technology's award-winning Intellisync™ software.
• '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.

About BT Cellnet

BT Cellnet today has over 7 million customers using its voice services and over 750,000 subscribers to its Genie Internet service. Wholly owned by BT plc, the company is driving beyond the boundaries of voice communication to lead the Mobile Internet revolution. BT Cellnet launched the UK's first Mobile Internet Service Provider, Genie Internet (www.genie.co.uk) in 1999 and the UK's first commercial WAP service in January 2000. It will also be the first to introduce the new generation of very high-speed mobile data services using GPRS, or General Packet Radio Services, in Summer 2000.

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, wireless personal computer card adapters, 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 (Nasdaq: RIMM) and the Toronto Stock Exchange (TSE: RIM). For more information, visit www.rim.net. Investors may contact investor_relations@rim.net. Customers may contact info@rim.net.

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 and RIM 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, risks related to the year 2000 issue, 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.