C U.

We bought outright our iPhone from AT&T and signed up for the auto payment. Everything worked fine until 3 months later when they started using an old CC that had been turned off after someone stole our number. I went online and made sure the correct card was set as default, but then I had to pay the extra $5. Because I had to manually pay it. Then next month they did it again, so my husband called and customer service said that it was paid in full until the next month and yes it was being billed to the new number. Then we get a notice that it didn't get paid again so I went online again and canceled all the CCs that were there and put only the correct one in, which showed that it was still the default one that they should be using. Again it got declined because they were using the old number. I called customer service again and they showed that they had the correct CC, but said I would have to still pay the extra $5 even though they were at fault. I asked to speak with a supervisor and they refused, said there wasn't one that could talk to me. I told them if they knocked off the $5 fee that I would stay with them. NOPE. I asked them to unlock the phone so that I could change companies. They said they would. Over 6 months later and they still refuse to unlock phone!
Bottom line... do not use them!

They lie to you
They have no customer service
They insult you
Their online site never works so you are forced to call and wait forever for an operator