I have purchased a T-mobile G2 which i have had unlocked and using with my Orange contract, 2nd hand phone off my mother. It is working fine but would like to upgrade the ROM for it. I have been onto the HTC site and it does say that the software is not sutible for the phone. I am guessing that this is because it is a T-Mobile phone...what i am wondering is if i use the official T-Mobile ROM will that reset my phone to only working with T-Mobile again? I know to some of you that this will be a silly question but i am new to Android phones....i've finally left my beloved BlackBerry Bold for something new!!