[crazaytalent]

If youve managed to switch your phone to metro pcs service it should work fully... i dont see why your phone and data would work but not the gps... even if its a service they dont have if your phone supports gps as the tp does, a simple 3rd party app like gps would be able to lock on to it,

as far as flashing, depending on the rom, in most caes it shouldnt provided you dont allow any customizations to happen, but you may needd some sort of carrier cab.. i dont know if theres any out there for metro pcs, as i never come across one, but if you find it, you should be fine to flash...