I have a family plan. I upgraded and ordered iPhone 6+ on a 2 g line planning to activate it on that line then transfer to my unlimited line to preserve the unlimited. Are you saying that when the phone comes I can just activate it on my unlimited line, even though I upgraded and ordered it on the 2g, and still keep my unlimited? Or do I have to activate on the 2g and switch?I don't know why everyone thinks they need to swap sims. Transferred my upgrade (since I'm unlimited) to my wife's line to buy phone. Activated the phone on my line when it got here. No sim changing. Confirmed with several reps that I still have unlimited. Did the same thing last year as well with no issue.