Hi my mother has just bought a sony ericsson xperia x10 mini pro 2nd hand which is locked to tmobile only she wants to be 3! I have scoured the internet for a free calculator that I can just pop in the IMEI and it will give me a code that works. I have even tried a few sites but they have said there is no code! and asked me to plug the phone into my laptop which I did but the program xs++ couldnt communicate with the phone! I have seen a couple of sites that state they can provide a code for this phone but are asking for