Okay so I have an AT&T phone and have an unlimited everything plan. But my girlfriend has the data, unlimited text, but limited minutes plan. It claims that calls at nights from 9 PM - 6 AM are free and weekends are free. And we only call from those hours and days. But she was charged $800 on her latest bill, because of her calls. It says she used 8 hours everyday. Is it possible she doesnt have free nights and weekends where she lives? Please help.