Dobson Cellular Systems and RIM Introduce the EDGE-enabled BlackBerry 8700g

Oklahoma City and Waterloo, ON - Dobson Cellular Systems (NASDAQ: DCEL) – a leading provider of wireless services in 16 states -- and Research In Motion (RIM) (Nasdaq: RIMM; TSX: RIM) today introduced the BlackBerry® 8700g™ to mobile professionals in the United States.

The BlackBerry 8700g is a sleek, lightweight handset that features a completely re-engineered device platform that is optimized to significantly enhance performance and usability. The BlackBerry 8700g is now available on Dobson’s high-speed EDGE network.

With a powerful Intel processor, 64 MB flash memory, 16 MB SDRAM and an optimized device platform, the BlackBerry 8700g offers faster web browsing, attachment viewing and application performance.

“Dobson customers can now take advantage of BlackBerry together with our EDGE network,” said Tom Roberts, Chief Marketing Officer for Dobson Cellular Systems. “The BlackBerry 8700g goes beyond a wireless phone and gives users throughout our service areas the ability to communicate in exciting new ways.”

“We are very pleased to bring the Blackberry 8700g to Dobson customers in the United States,” said Mark Guibert, Vice President, Corporate Marketing at Research In Motion. “The BlackBerry 8700g and Dobson’s high-speed EDGE network together offer a powerful solution for individuals and organizations that want to enhance communications and increase mobile productivity.”

In addition to leading wireless email and wireless data features, the quad-band BlackBerry 8700g incorporates premium phone features such as dedicated ‘send’ ‘end’ and ‘mute’ phone keys, smart dialing, conference calling, speed dial, call forwarding, speakerphone and Bluetooth® support for hands-free use with car kits and headsets.

The BlackBerry 8700g features a bright, landscape QVGA (320 x 240) LCD screen that supports more than 65,000 colors and uses active matrix transmissive technology to deliver exceptionally vivid graphics. The BlackBerry 8700g also automatically adjusts both the LCD and keyboard lighting to provide the best viewing for outdoor, indoor and dark environments.

For corporate customers, BlackBerry Enterprise Server™ software tightly integrates with Microsoft® Exchange, IBM Lotus® Domino™ and Novell GroupWise® and works with existing enterprise systems to enable secure, push-based wireless access to email and other corporate data.

For individuals and smaller businesses, BlackBerry Internet Service™ allows users to access up to ten corporate and/or personal email accounts (including Microsoft Exchange, IBM Lotus Domino and most popular ISP email accounts) from a single device.

Dobson operates under the trade names Cellular One from Dobson Cellular Systems and Dobson Cellular Systems in more than 65 wireless markets.

About Dobson Cellular Systems

Dobson Cellular Systems is a subsidiary of Oklahoma City-based Dobson Communications Corporation (NASDAQ: DCEL.) The company serves nearly 1.5 million wireless customers throughout 65 markets in 16 states. For more information on Dobson, visit www.dobson.net.

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 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.

Contact Information

Marisa Conway

Brodeur Worldwide (for RIM)

Research In Motion (RIM)

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