Hey guys i have a quick question for you all. I want to buy an old iPhone 2G (my current phone is dead and i don't really wanna spend anymore) for about $100 off of ebay. The phone isn't unlocked either. I currently have an AT&T family plan with 1000 minutes and unlimited text, but no data. If i take out my SIM card from my dead phone and put it into the iPhone, will it work without a jailbreak?