I lost my old phone (fell out of my pocket at Quantum of Solace, not there when I came to search ), and I've been using a crappy replacement since then, but I will soon have some money (summer job) and so I'm looking to spend $100 to $150 on a new cell phone. I am 18 and have been on a family plan for awhile, but this may soon change, so I do not want to sign into a contract. So basically I am looking for a phone on ebay/craigslist that will work with AT&T or T-Mobile. Some phones I am looking at are: RAZR 2 RAZR V3xx HTC Touch iPhone? (1st gen are kinda cheap...) I'm not sure what to look for with these (do all gsm work with all providers?) so any suggestions? I know the iPhone needed to be unlocked but I also was under the impression that it is very easy. However, my brother has a sony ericson from Rogers (canada) that he has so far been unable to unlock. He may have just not tried hard, but is it easy to unlock a standard phone (like razr)?