When i got this blackberry 8310 it was used and there may be a physical problem with it but i hope not. I had the phone unlocked by using the code you get from at&t to unlock it and when i was able to do that the phone would read the T-mobile sim but i didn't get any service and when i manually searched for networks it wouldn't find any. I really want to get this phone working as soon as possible so any suggestions?