New AT&T USBConnect 881 Delivers Enhanced Performance and Automatic AT&T Software Installation

New LaptopConnect USB Device Takes Advantage of AT&T HSPA Network Upgrades and Is Pre-Loaded With AT&T Communication Manager

San Antonio, Texas, November 14, 2007

Vancouver, B.C. — AT&T Inc. (NYSE:T) and Sierra Wireless (NASDAQ:SWIR - TSX:SW) today announced the availability of the AT&T USBConnect 881, a new, easy-to-use wireless USB data device that is the first to have AT&T Communication Manager software pre-loaded. The AT&T USBConnect 881 automatically installs AT&T Communication Manager when first used with Microsoft Windows Vista, XP and 2000 notebooks1. This eliminates the need for an installation CD to provide a plug-and-play experience for most users.

The AT&T USBConnect 881 enables laptop owners to quickly and easily send and receive e-mail and access the Internet on AT&T's 3G High Speed Packet Access (HSPA) BroadbandConnect wireless network. This network has upload speeds between 500 Kbps and 800 Kbps and enhanced download speeds ranging between 600 Kbps and 1,400 Kbps. The faster download speeds provide an optimal wireless Internet-browsing experience, and the faster upload speeds will enhance users' ability to send large files, such as e-mail with attachments, photos or business documents.

AT&T is the first U.S. carrier to deploy enhanced upload speeds through High Speed Uplink Packet Access (HSUPA) in its HSPA network. HSPA is the latest generation of mobile broadband technology based upon the global standard for wireless — GSM.

"The introduction of the AT&T USBConnect 881 is another great solution for laptop owners who need to stay connected to their world — everywhere they live and work," said Michael Woodward, AT&T vice president, Business Voice/Data and wireless products. "The USBConnect 881, with its new automatic software installation, will allow them to do just that, faster and easier than ever."

The AT&T USBConnect 881 can be used internationally in 139 countries, so it is an ideal choice for international travelers. In addition, the USBConnect 881 works seamlessly across HSPA and EDGE/GPRS networks and provides customers with the ideal mix of coverage and performance whether they are traveling across town, the U.S. or the world. AT&T's nationwide2 EDGE network is the largest national high speed wireless data network in the U.S.

"The addition of automatic software installation to the AT&T USBConnect 881 provides a better out-of-the-box experience for AT&T customers," said Dan Schieler, senior vice president of Worldwide Sales for Sierra Wireless. "With the faster network speeds AT&T is rolling out and the ease of use the USBConnect 881 provides, this is quite simply one of the easiest ways to get online and stay connected. We are pleased to work with AT&T once again to improve the customer experience."

AT&T offers a variety of DataConnect rate plans, including an unlimited data plan for $59.99 a month for customers, with a two-year contract. AT&T's DataConnect North American plan of 100MB for $109.99 a month provides for usage in select Canada and Mexico roam zones, as well as unlimited domestic use. The DataConnect Global plan of 100MB for $139.99 a month covers additional data usage in select roam zones in more than two dozen countries, including many European countries, India, China, South Korea and Japan.

AT&T HSUPA Deployment
The deployment of HSUPA will complete the transition of the AT&T 3G network to HSPA standards. HSDPA technology is deployed today across the company's 3G footprint, which includes more than 220 U.S. major metropolitan areas. HSUPA will be added throughout the network in the remainder of 2007 and early 2008, and new AT&T 3G deployments moving forward will include both HSPA technologies.

HSUPA technology initially provides enhanced upload speeds for laptop users. AT&T launched its first HSUPA device, the AirCard 881, in October. Additional LaptopConnect cards and other HSUPA-compatible devices are expected to be certified by AT&T later this year and in 2008.

The HSPA network enhancements demonstrate AT&T's continuing commitment to deploying a network that delivers the industry's best wireless experience. Over the past three years, the company has invested more than $18 billion to build the scope and capability of its wireless network while focusing on the service criteria that matter the most to customers — widespread voice and data coverage, high speed data connectivity, service flexibility and service reliability and quality.

The AT&T USBConnect 881 will be available for purchase across AT&T sales channels starting Nov. 14. The USBConnect 881 will be available for $49.99 with a new two-year DataConnect contract of $59.99 a month or higher. The service can be purchased at AT&T retail stores nationwide, online at www.wireless.att.com and through AT&T's business-to-business sales organizations.

For the complete array of AT&T offerings, visit www.att.com

1To download a free Mac client, visit www.sierrawireless.com/support/att/mac. Sierra Wireless' Mac client supports Tiger v10.4 (and later) and Leopard Operating Systems.

2Not available in all areas

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About Sierra Wireless
Sierra Wireless modems and software connect people all over the world with mobile broadband networks that keep them in touch, informed, and productive from wherever they need to be. The Company offers a diverse product portfolio addressing enterprise, consumer, original equipment manufacturer, machine-to-machine, and specialized vertical industry markets, and provides professional services to customers requiring expertise in wireless design, integration, and carrier certification. With 2006 revenues of $221 million, Sierra Wireless (NASDAQ: SWIR – TSX: SW) is headquartered in Richmond, British Columbia, Canada with additional offices in Carlsbad and Hayward, California; London; and Hong Kong. For more information about Sierra Wireless, visit www.sierrawireless.com. "AirCard" is a registered trademark of Sierra Wireless. Other product or service names mentioned herein may be the trademarks of their respective owners.

Sierra Wireless — 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.

About AT&T
AT&T Inc. (NYSE:T) is a premier communications holding company. Its subsidiaries and affiliates, AT&T operating companies, are the providers of AT&T services in the United States and around the world. Among their offerings are the world's most advanced IP-based business communications services and the nation's leading wireless, high speed Internet access and voice services. In domestic markets, AT&T is known for the directory publishing and advertising sales leadership of its Yellow Pages and YELLOWPAGES.COM organizations, and the AT&T brand is licensed to innovators in such fields as communications equipment. As part of its three-screen integration strategy, AT&T is expanding its TV entertainment offerings. Additional information about AT&T Inc. and the products and services provided by AT&T subsidiaries and affiliates is available at www.att.com.

© 2007 AT&T Intellectual Property. All rights reserved. AT&T, AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies.