Press Release

July 20, 2000

OneMain.com Rolls Out Research In Motion's BlackBerry Wireless Email Solution

Reston, VA - OneMain.com (Nasdaq:ONEM), the leading national Internet service provider serving smaller metropolitan markets and rural communities, today announced it has begun offering wireless email service through its agreement with Research In Motion Limited (Nasdaq: RIMM, TSE: RIM).

The service, which offers RIM's BlackBerry Internet Edition™, complements OneMain.com's full array of Internet business services and is one of the first components of OneMain's wireless strategy and ongoing business-to-business initiatives.

"OneMain.com continues to meet its critical communications mission by providing an expanding suite of competitively priced, fully integrated Internet services," said Rod Lefever, vice president, new development. "Through our agreement with RIM, OneMain.com is better able to serve the needs of our business customers, especially those with time sensitive email requirements."

"With BlackBerry Internet Edition, OneMain.com customers will be able to access email and other services through RIM's leading edge wireless technology," said David Werezak, VP Marketing, Research In Motion. "Offering the unique and popular BlackBerry™ wireless email solution will allow OneMain.com to extend and enhance relationships with its customers."

BlackBerry Internet Edition gives OneMain.com's subscribers an end-to-end wireless email solution that is fully integrated with their primary email account. The BlackBerry solution includes a powerful wireless handheld with integrated email/organizer software, PC docking cradle, PC synchronization software and affordable airtime. BlackBerry provides instant notification when new messages arrive and the ability to read and send email on the go. It also provides other popular organizer functions including calendar, address book, task list alarm, calculator, and memos.

Initially, OneMain's wireless email will be offered where available through its integrated local operations in California, Tennessee, Illinois, Pennsylvania and Missouri that are currently connected on the Company's next generation network. OneMain will expand this service as it continues to integrate its local operations serving 35 states.

OneMain.com pricing plans:

RIM 950™:
"pager" size, $299 + $25 set up fee + Shipping and Handling

RIM 957™:
"palm" size, $419 + $25 set up fee + Shipping and Handling

For both models, the wireless service fee is: $59.95 / month or $659 / year

As a special introductory offer, OneMain.com will waive the $25 set up fee and will charge $49.95 / mo. or $539 / yr for the wireless service fee.

Ordering and Support

Web access: http://blackberry.onemain.com
Email: BBSupport@OneMain.com, BBInfo@OneMain.com
Phone: East Region Business Services Center at 877-292-3742,
M-F 8AM-5PM Eastern Time.

About OneMain.com (http://www.onemain.com)

Based in Reston, Virginia, OneMain.com (NASDAQ: ONEM) is "your hometown Internet." With more than 762,000 subscribers, OneMain.com is one of the largest independent Internet service providers (ISP) in the country. OneMain.com provides Internet access, services and local content throughout the United States to individuals and businesses predominantly located in smaller metropolitan markets and rural communities. OneMain.com believes these customers have traditionally been under-served by national ISPs and that a great opportunity exists to meet the growing demand for on-line services in these markets. On June 8, Earthlink announced plans to acquire OneMain.com. The transaction is expected to close later this year.

About Research In Motion

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 part developers and manufacturers in North America and 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 is listed on the Nasdaq Stock Market (Nasdaq: RIMM) and the Toronto Stock Exchange (TSE: RIM). Investors may contact investor_relations@rim.net. Customers may contact info@rim.net. For more information, go to www.rim.net.

This press release contains forward-looking statements related to OneMain.com's opportunities and future growth. Any or all of these forward-looking statements we make in this press release or in any other public statements we make may turn out to be wrong. These statements can be affected by inaccurate assumptions we might make or by known or unknown risks and uncertainties, including but not limited to, risks related to OneMain.com's integration strategy, product deliveries, market acceptance of certain products, and other factors affecting OneMain.com's prospects. The forward-looking statements should be read together with the information presented in recent OneMain.com SEC filings, including Risk Factors and Management's Discussion and Analysis.

Research In Motion, RIM, RIM 850 Wireless Handheld, BlackBerry and BlackBerry Exchange Edition are trademarks or registered trademarks of Research In Motion Limited.