i have been going through threads, trying to figure this out myself, but nothing seems to work. i have a 3GS that i jailbroke. worked fine. came across someone who said they could unlock it, which was good because it was set up for at&t and i was telus (ebay water damage trade) well, they got it back to me a few hours later, said it worked, but it was "tethered" well, battery died. charged it back up, ever since then, i can get the apple sign, plug it into the computer, it says it needs to restore. try and restore, it gets 3/4 through and kicks me out. tried running green poison, pwnage tool, and reboot, to no avail. somebody said i may have to run custom IPSW's? what are they? would that help? i don't even care if i unlock it or not at this point, i just want to get it working again. can anyone help?