Sierra Wireless AirCard® 775 now available from Telfort in the Netherlands

Sierra Wireless AirCard 775 wireless wide area network card is the EDGE card of choice for the Dutch network operator
Vancouver, B.C.-April 20, 2005

Sierra Wireless (NASDAQ: SWIR - TSX: SW) and Telfort today announced that the AirCard® 775 wireless wide area network card is now available to Telfort customers in the Netherlands. With quad-band operation for global roaming on EDGE (Enhanced Data rates for Global Evolution) and GSM/GPRS networks, the AirCard 775 provides mobile users with quick, wireless connectivity to the Internet, e-mail and corporate applications. The AirCard 775 is available in Telfort shops, online at www.telfort.nl, as well as from resellers selling Telfort subscriptions, and will be supplied at no extra charge to customers who purchase a two-year subscription at €30 per month.

Telfort is a Dutch supplier of mobile telecommunications services, offering products specifically tailored for the needs of the Dutch market. With coverage that serves 99.2 per cent of the Dutch population, Telfort targets both consumer and business customers with practical, innovative products that are easy to manage and offer clear value for money.

"Sierra Wireless is committed to delivering best-in-class devices and services to customers worldwide," said Derek Evans, Vice President and Managing Director for Sierra Wireless, EMEA. "The AirCard 775 is a classic example of this commitment - it is simple to install, configure, and manage, offers superior performance and low power consumption, and supports all four frequency bands used by EDGE and GSM/GPRS networks worldwide - and we are pleased to work with Telfort to deliver the product to mobile professionals in the Netherlands."

About the size of a credit card, the Sierra Wireless AirCard 775 is a multi-slot Class 12 EDGE PC card, ideal for mobile professionals who are heavy data users and those who travel frequently. The quad-band operation (850/900/1800/1900 MHz) also enables worldwide roaming on EDGE and GSM/GPRS networks, allowing travelers to access data wirelessly in more than 70 countries with GPRS service, and 30 countries where EDGE is available. On an EDGE network, the AirCard 775 allows users to transfer data at speeds averaging between 100 and 130 kilobits per second (kbps), with bursts up to 216 kbps. The included Sierra Wireless Watcher software makes the card simple to install, configure, and use, seamlessly integrating the card into a variety of Windows notebook or handheld devices and allowing users to send and receive SMS messages and voice calls while accessing email and Internet applications. The AirCard 775 is designed for low power consumption to extend battery life.

For more information about the Sierra Wireless AirCard 775 PC Card please visit www.sierrawireless.com/product/AC775.aspx.

For more information about Telfort, please visit www.telfort.nl.

About Sierra Wireless
Sierra Wireless is a leader in delivering highly differentiated wireless solutions that enable our customers to improve their productivity and lifestyle. Sierra Wireless develops and markets the AirCard, the industry-leading wireless PC card line for portable computers; embedded modules for OEM wireless applications; the MP line of rugged vehicle-mounted connectivity solutions; and Voq, a line of mobile phones with easy-to-use, secure software solutions for mobile professionals. For more information about Sierra Wireless please visit www.sierrawireless.com.

"AirCard" is a registered trademark of Sierra Wireless. "Voq Professional Phone" is a trademark of Sierra Wireless, Inc. Other product or service names mentioned herein may be the trademarks of their respective owners.

About Telfort
Telfort is an independent and profitable provider of mobile telecommunication for both consumers and business clients. Telfort offers high quality products at extremely competitive rates. Telfort employs a high standard network and focuses on customer service for its more than 2,2 million customers. Telfort is a vital organization which quickly anticipates market developments. Besides the Telfort brand the company was able to develop a new market segment: the wholesale market. Albert Heijn, EasyMobile, Debitel, Lebara, MEC Solutions, Peptalk, Tele 2, Transatel and Versatel opted for Telfort to provide mobile services under their brands. Telfort uses this partner approach to expand its range in specific market segments.

Forward Looking Statements
This press release contains forward-looking statements that involve risks and uncertainties. These forward-looking statements relate to, among other things, plans and timing for the introduction or enhancement of our services and products, statements about future market conditions, supply conditions, channel and end customer demand conditions, revenues, gross margins, operating expenses, profits, and other expectations, intentions, and plans contained in this press release that are not historical fact. Our expectations regarding future revenues and earnings depend in part upon our ability to successfully develop, manufacture, and supply products that we do not produce today and that meet defined specifications. When used in this press release, the words "plan", "expect", "believe", and similar expressions generally identify forward-looking statements. These statements reflect our current expectations. They are subject to a number of risks and uncertainties, including, but not limited to, changes in technology and changes in the wireless data communications market. In light of the many risks and uncertainties surrounding the wireless data communications market, you should understand that we cannot assure you that the forward-looking statements contained in this press release will be realized.

For Further Information:
Sharlene Myers
Sierra Wireless
Phone: +1 (604) 232-1445
Email: smyers@sierrawireless.com
www.sierrawireless.com

Flip Dotsch
Telfort
Phone: +31 6 26 584 501
Email: flip.dotsch@telfort.nl
Website: www.telfort.nl