Hello, I tried searching but could not find exactly what I am looking for, but i apologize if this has already been discussed. I am currently a Tmobile customer and plan on switching to AT&T for the new iphone (even if tmobile gets it as rumored). I had swapped my original plan for a family plan to add my mother years ago as she does not use her phone much (mainly for emergencies, mobile to mobile calling, and texting) and an extra 10 dollars/month was the smartest option at the time. Now that I want to switch to AT&T, I will probably have her and my dad take advantage of Tmobile's 49.99/line family deal while and move over. Is it possible for me to sign up with AT&T, port my number, but not sign a contract (I will be using an unlocked phone I have)? Then, when the phone is released sign a contract to take advantage of the subsidized pricing? The reason i ask is because I will be moving out of the state in a few weeks and i would like to have all this taken care of before I leave.