In court documents in a suit filed on behalf of AT&T customer Patrick Hendricks attorneys wrote, "A significant portion of the data revenues were inflated by AT&T's rigged billing system for data transactions," Beta News reported Tuesday.
Court papers claim that attorneys set up test account for an iPhone, then closed all of its apps and left the device unused for 10 days. AT&T still billed the account for 2,292 KB of usage.
"This is like the rigged gas pump charging you when you never even pulled your car into the station," the lawsuit says.
The lawsuit says AT&T routinely bills for 7 percent to 14 percent more data transactions than normally takes place.
Attorneys said they would file to have the case moved to class-action status, which make the outcome relevant to all of AT&T's iPhone accounts.