Hi, I would really like to know what happened here. I bought my 3GS in Italy, unlocked. When I came in the U.S. I could use the phone on t-mobile, no problems (only the 3G is not working). My battery suddenly died, and I am under applecare warranty, so I went to the store, where I was given a new 3GS. Only thing, I was told to restore the phone with my Italian SIM, so that I could have the phone unlocked. That worked, and I can use my new phone with t-mobile now. I don't understand, the new phones are unlocked and then they become locked after activation? Are they locked and I have the mighty power to unlock any device now? What happened?