AT&T today announced the Option GT Max 3.6 Express ExpressCard; and in early May the Sierra Wireless AirCard 875U mobile broadband device for USB ports, both powered by AT&T's 3G BroadbandConnect service and able to download a 1 megabyte file in about 15 seconds on average.

In addition, both devices can be used in 125 countries, where AT&T has international data-roaming agreements, and are the only single-device, single- rate-plan and global 3G solution offered by a U.S. wireless carrier for their device types.

The Option GT Max 3.6 Express has been designed to work in newer notebooks with ExpressCard slots, and it features a flip-up antenna and Advanced Receiver Technology for improved 3G performance. The GT Max 3.6 Express is compatible in notebooks with ExpressCard/34 and ExpressCard/54 slots and supports Microsoft Windows XP, 2000 and Vista.

The Sierra Wireless AirCard 875U mobile broadband device plugs directly into the standard USB port in notebooks. The AirCard 875U features an integrated battery to ensure optimal performance, and it supports Microsoft Windows XP, 2000 and Vista.

AT&T's unlimited DataConnect rate plan is available for $59.99 for customers with a two-year contract and qualifying AT&T wireless voice plan. AT&T's DataConnect North American plan of 100 megabytes for $109 a month provides for usage in select Canada and Mexico roam zones. DataConnect Global plan of 100 megabytes for $139 a month covers data usage in select roam zones in more than two dozen countries including many European countries, India, China and Japan. Both plans also include unlimited domestic data usage.