my iphone is bought week ago at US. so probably firmware on it should be 1.0.2, its still on the box, i'll have it probably here probably on monday(KOSOVO), i use win xp, itunes version 7.4.1.2, so will i be ok to unlock to use with local carrier long as i don't update anything, i readed many threads here and people around have different problems like can't send or receive sms , wifi etc. so what should i use ,wich unlock method, thanks