I have a 3GS with the latest 4.2.1 firmware and decided to attempt to jailbreak with Redsn0w (definitely shouldnt have!). Everything uploaded fine but was stuck at a partial reboot once it was done. I left it alone for over an hour but it didnt do anything so I did a hard shut off. Now it's stuck in recovery boot mode. I've attempted iRecovery but couldnt figure it out. I used Umbrella to try to kick it off recovery mode but that didnt work. I've read for hours all over the net but no joy. Does anyone have any ideas? FWIW, trying to recover using Itunes does everything but the last finishing touches and then get an error. If I try to redo the jailbreak it reloads everything up until the finishing portions again and get the same error. Any help would be great appreciated!!