so I was talking to my friend telling him that he should get the iPhone. He has atnt. I told him that as long as he gets the iPhone unlocked he dosnt have to get the iPhone plan. Get make sure he gets unlimted data plan and texts. Will atnt figure out that he has an iPhone and charge him for the iPhone price? My other friend was saying that atnt will see how much kb he's useing and make him pay extra? Myth or fact?