Ok so here's the basics, im completely useless with anything technical. Ive tried to read other posts and forums but the advice seems to be either old or conflicting. If anyone can give me an honest answer i would really appreciate it. Thank you for taking the time to read this. I have my iphone 3g on an 18 month 02, uk contract with a 3g sim. My phone was stolen within two months ( i hate thieves boooo) and i was stupidly not insured because i couldnt afford it (what a plank). Ive cancelled the sim and i have received a replacement from o2 which currently sits in a vile n95. To buy a new one from 02 it will cost at least £350.00, i can get one from the US for £200.00 but i need to know if it will work if i put my O2 chip inside and i cant afford another disaster. Will there be problems with software? will i have problems with O2 if i need help with anything? Do i need to register the new phone with them? Im really sorry to ask all of these age old questions but im struggling. Thanks again any help would be appreciated.