I don't care about unlocking, but do want my jailbreak. I've already jailbroken my 3GS with 3.1. I'm sticking with ATT so should I upgrade the baseband? Would this help with reception etc? Since I've already jailbroken my iPhone. Would I be able to just update with the ATT 3.1 verision to upgrade the baseband, then restore with the jailbroken firmware? Thanks!