NII Holdings and RIM Launch BlackBerry for Nextel Mexico and Nextel Peru Customers

Reston, VA and Waterloo, ON - NII Holdings (Nasdaq: NIHD) and Research In Motion (RIM) (Nasdaq: RIMM; TSX: RIM) today announced availability of the BlackBerry 7100i™ for Nextel Mexico and Nextel Peru customers, combining Nextel’s leading services (DirectConnect®, International Direct Connect™, Digital Cellular telephony and SMS Text Messaging) with the popular and proven features of BlackBerry. The BlackBerry 7100i supports easy wireless connectivity to ‘push-based’ e-mail, phone, long-range digital walkie-talkie, text messaging, Internet browsing, organizer and corporate data applications in a stylish phone form factor for mobile users.

The BlackBerry 7100i has a large high-resolution color screen (240 x 260 pixels) that displays crisp images with a sizeable workspace for composing and reading messages as well as viewing web pages and attachments. It also features 64 MB of flash memory and includes a built-in speakerphone, GPS support for location-based applications and services, dedicated send and end keys and Bluetooth® support for wireless headsets and car kits

“NII Holdings continuously brings the most efficient wireless communications solutions for conducting business to its high-value customers in Latin America. For that reason, we are pleased to add the BlackBerry 7100i to our portfolio of superior communications solutions for mobile professionals,” said Douglas Dunbar, VP of Sales and Marketing, NII Holdings. “The addition of the integrated BlackBerry solution to our product offering reinforces NII Holdings’ commitment to the corporate segment, which is constantly in need of solutions that enable them to conduct business while on–the–go.”

“The popularity of BlackBerry continues to grow across Latin America and we look forward to fueling this momentum with NII Holdings,” said Mark Guibert, Vice President, Corporate Marketing at Research In Motion. “The combination of Nextel’s services with BlackBerry provides mobile professionals with a compelling productivity tool that keeps them connected to important information and communications throughout the day.”

The BlackBerry 7100i also incorporates RIM’s SureType™ keyboard technology, which effectively converges a phone keypad and a QWERTY keyboard to allow for a narrower wireless phone form factor. Through an integrated keyboard and software system, SureType gives users the familiar look and feel of a phone and allows them to dial phone numbers and type messages quickly, accurately and comfortably.

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 e-mail and other corporate data.

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

About NII Holdings, Inc.

NII Holdings, Inc., a publicly held company based in Reston, Va., is a leading provider of mobile communications for business customers in Latin America. NII Holdings, Inc. has operations in Argentina, Brazil, Mexico and Peru, offering a fully integrated wireless communications tool with digital cellular service, text/numeric paging, wireless Internet access and Nextel Direct Connect®, a digital two-way radio feature. NII Holdings, Inc., a Fortune 1000 company, trades on the NASDAQ market under the symbol NIHD and is a member of the NASDAQ 100 Index. Visit the Company’s website at http://www.nii.com.

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 e-mail, 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. RIM assumes no liability and makes no representation, warranty or guarantee in relation to third party products or services.

“Safe Harbor” Statement under the Private Securities Litigation Reform Act of 1995. A number of the matters and subject areas discussed in this press release that are not historical or current facts deal with potential future circumstances and developments. The discussion of such matters and subject areas is qualified by the inherent risks and uncertainties surrounding future expectations generally, and also may materially differ from NII Holdings’ actual future experience involving any one or more of such matters and subject areas. NII Holdings has attempted to identify, in context, certain of the factors that it currently believes may cause actual future experience and results to differ from NII Holdings’ current expectations regarding the relevant matter or subject area. Such risks and uncertainties include the economic conditions in our targeted markets, performance of our technologies, timely development and delivery of new technologies, competitive conditions, market acceptance of our services, access to sufficient capital to meet operating and financing needs and those that are described from time to time in NII Holdings’ Annual Report on Form 10-K for the fiscal year ended December 31, 2005 and other reports filed from time to time with the Securities and Exchange Commission. This press release speaks only as of its date, and NII Holdings disclaims any duty to update the information herein.

Nextel, the Nextel logo, Nextel Online, Nextel Business Networks and Nextel Direct Connect are trademarks and/or service marks of Nextel Communications, Inc.

Nextel and Nextel’s logos are registered trademarks and/or service marks of Nextel Communications Inc.

Contact Information

Marisa Conway

Americas Contact

Brodeur Worldwide (for RIM)

Contact via E-mail