I am ATT customer eligible for an iPhone. My mom lives in same state, different area code, not ATT customer. When I get iPhone I need to either increase my minutes OR get Mom to become ATT customer so the minutes are free when talking to her. (i am running over my current limit - and speak with her a lot). The extra minutes will be about an additional $30, the same price as adding a line to a family plan. Then if she gets an iPhone, I don't get her the data plan. So the cost is about the same either way. Right? Any ideas? Thanks!