AT&T has begun offering free Wi-Fi to iPhone-using customers at some of its Wi-Fi hotspot locations, according to several reports. When a participating AT&T Wi-Fi network is accessed by an iPhone user, a specially-formatted page appears offering “Free AT&T Wi-Fi for iPhone.” iPhone users must enter their mobile phone number to gain access, likely indicating that users must also be AT&T customers in order to log on. In its recent announcement of the Wi-Fi partnership with Starbucks, AT&T said it would “soon extend the benefits of Wi-Fi at Starbucks to its wireless customers,” but has yet to make any further announcement concerning Wi-Fi access for iPhone users. It is currently unclear whether this service is being offered at all AT&T hotspots, or just specific locations. A full list of AT&T Wi-Fi hotspots can be found on the company’s site.