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AT&T Providing Free Wi-Fi Access to iPhone Users [Updated]
MacRumors has been able to confirm this finding at a local Barnes and Noble. Blurry photo provided:
AT&T recently partnered with Starbucks (displacing T-Mobile) to provide Wi-Fi access to Starbucks' 7000 stores nationwide. This partnership allowed existing AT&T broadband customers free access and AT&T promised that it would "soon extend the benefits of Wi-Fi at Starbucks to its wireless customers", but no official announcement has yet been made.
A list of AT&T's 71,000 hotspots can be found on AT&T's site, including Starbucks, Barnes & Noble, Airports, and McDonald's locations.
Update: MacRumors reader ntrigue confirms that AT&T's system is based on the iPhone's User Agent, which can easily be faked on laptops. He successfully accessed the free iPhone Wifi through his laptop (and a valid iPhone phone number)"