i tired to do the untethered jailbreak for 4.3.1 baseband 6.15.00 using redsn0w 0.9.6 rc 16 but it stuck at last stage waiting for reboot. i cant do any thing. so help me please if anyone have got idea to get out from that problem.
Ok I don't know whats wrong. You might want to just start over. Restore to a stock 4.3.3 and use redsn0w on it. Or you can find a custom firmware that has the iPad baseband packaged in it (google, these are made via PwnageTool so if you have a Mac, make one yourself. If not find one) then restore to it.
If youre gonna use a custom fw then remember to set device into pwned dfu mode with redsn0w first then doing the shift+restore