hello all, new here but have a quick question.. I bought a 3g i phone and am unlocking it for t mobile.. I downloaded redsn0w the right firmware (4.2.1) and go to jailbreak it, when i hold the buttons down near the end of the last one about 5 seconds left (let go of power and hold JUST home. ) i hear what sounds like the device re syncing with my computer and it messes the whole process up. (also have tried to jailbreak with green poison and it does same thing.. which is why im stumped...)