ok wel i bought a new 3g. so i gave my old 2g to my brother. he has t mobile. i jailbroke it and unlocked it. what is he not going to be able to get other than visual voicemail? i think his google maps app wasnt working where as mine flew my exact location. any ideas or possible links to where i can find what he will be able to use and what he wont be able to use?