I had Tmobile family plan with my parents for years and I just transferred to AT&T because of the 920, though, my phone is not activated yet(still on its way to me slowly), and my parents haven't released me from their family plan. I am wondering what will happen if I don't activate the phone with AT&T and instead unlock it with third party? Will I be able to just cancel the AT&T contract? Because I have read threads here about switching to Straightalk. Any ideas?