Sierra AirCard 300 (Handheld only)

"The card was tested with an account provided by AT&T. It worked fine in Seattle and Vancouver, British Columbia but wouldn't work when tested in Edmonton, Alberta, even though the CDPD provider is the same as the one in Vancouver. AT&T couldn't come up with a valid reason why, nor could Sierra Wireless."

"You can use PDAs for wireless Internet access with some digital phones using serial cables, CompactFlash cards, or infrared connections, but in those cases the transfer speed is limited to the digital phone data-carrier rates (14.4 Kbps or less), and per-minute connection charges can mount up quickly",