"AT&T announced today that iPhone users are using too much data on their network in larger cities such as New York and San Francisco. AT&T claims that the high bandwidth usage, brought on by iPhone users, is causing network issues, resulting in dropped calls, slow 3G network and/or problems connecting to the network at all.

AT&T recently launched an iPhone app to help consumers understand how much bandwidth and usage they have been using, in order to cut back on the amount of data they use. Consumers with the unlimited data plan may have to pay a penalty if they use more than 5GB a month soon. AT&T is thinking about making consumers who go over their 5GB allowance to pay a fee, depending on the extra usage."