Just formated my 3g 3.0 jailbroken by resting all files under the settings menu. When it finished, it didnt get past the apple logo so i DFU'd and upgraded to 3.0.1 regular firmware. after that, i jailbroke using dinozambas tutorial on youtube and everything worked fine but for some reason, my T-Mobile SIM card has no service (bars) or carrier logo. any idea on what could fix this? Thanks.