I have a friend who I have known for a year and I was looking at my phone bills and realized that all the calls and text messages I received and sent to her don't appear in my AT&T wirless phone bills. I've looked back at the past 6 bills and she doesn't appear in a single one. Is it a glitch or is it possible that she is in some special situation that hides the calls/texts? It's very weird. She has an iPhone.