So on my girlfriend's phone line which is part of my family plan I got a message yesterday warning me that she was nearing her 2Gb data limit... I found this really weird since she has never even come close to approaching her limit and here we are with 17 days left in my billing cycle.... So I go to my account management page and I see that AT&T has been billing ridiculous amounts of data at odd hours like 1:00am or 2:00am on weekdays. Now I know for a fact that she is in bed sleeping at that time and her phone is in airplane mode. Furthermore when she is home her phone is always on our wi-fi network. So I called AT&T and the customer service rep just basically played dumb like she didn't know how that could possibly be happening. Anyway I was polite and didn't lose my cool.... at the end she told me that she would put something in the system and if the phone line goes over they would credit me the overage charges, but they couldn't do anything to reverse the data that is already on there.