A California man has sued AT&T for over billing him on data charges for his iPhone, a move that could raise new questions on the carrier's billing practices. Patrick Hendricks claims that the carrier was charging him for usage even when he wasn't using any.Hendricks uses the $15 monthly 200MB plan, and apparently became suspicious after he was charged overage fees for using 223MB worth of data across 259 data connections. His lawyers say that their research showed that AT&T was regularly over billing customers between 7 and 14 percent over actual data usage, and in some cases as much as 300 percent.AT&T's billing errors on a customer basis may not be that large. However, apply that across all iPhone customers and it has a "huge effect" on the bottom line for the company, Hendricks' lawyers claim in the suit. "A significant portion of … data revenues were inflated by AT&T's rigged billing system for data transactions," they wrote.
