hi, there is this guy who wants to sell his iphone 3gs for 200£ which is very cheap. the phone is in good condition and he says its brand new. the problem here is not having the box of the phone, neither the data cable. the head phone seems to be duplicate. i bliv he has robbed this phone or he has found it somewhere. the phn is locked on O2 n/w and he is not aware hw to unlock it dats why he is saying its just an ipod. what if i buy the phn and when i put my sim card will the phn get locked as the owner might have reported the IMEI no and than O2 locks it. is this possible? the phone is in excellent condition thats making me think should i buy it or not.