Dear u can unlock your t-mobile by doing these steps :-
1. PUT IN A
SIM CARD THAT IS NOT A T-mobile
sim card!!!!
2. at the "wrong card" screen press *2767*3855# and let it reboot(restart).
3. It will start up and it will look like it is unlocked but ITS ONLY TEMPORARY!
4. Now press *7465625*638*00000000*00000000#....some message will pop up and disappear...
5. Now press #7465625*638*00000000# and a message about network lock INACTIVE..and now your phone is UNLOCKED FOREVER!!!! (your welcome!)
6. to make sure it's unlocked press *#7465625# ...don't worry this is only to check...
