After looking through the comments on the iPhone 3.0.1 jailbreak and unlock post, it looks like many people appear to be having a problem where 
the redsn0w program is stuck on the “Waiting for Reboot” screen.
Here is a fix for this:
- Unplug your USB quickly and then plug it back in. Your iPhone will reboot and the jailbreaking process will continue.
Thanks to dococ for the tip!
Jailbreak iPhone 3.0.1
Jailbreak and unlock iPhone 3.0.1
Jailbreak iPhone 3.1
Jailbreak iPhone 3GS 3.0 with purplera1n
i tried it and it didnt work, and now my phone wont turn on? i cant restore it back to 3.0 is there jail breaking in 3.1?
the phone is stuck on reboot and i already quickly unplugged and plugged the usb but nothing happened. its still struck on reboot
does NOT WORK!!!!!
Which version of redsn0w did you guys use? I had the same issue with an iPhone 3G running 3.0.1 and redsn0w 0.8.
Solution is keep it in DFU mode, cancel redsn0w 0.8, open redsn0w 0.72 and go through the process, no need to go in DFU mode again.
It should work then. Any questions just hit me up.
~meebz
Thanks!! Worked like a charm for me.
OMG! I GOT IT! you restore it like it says. than when it says waiting for reboot. you unplug it restore it again and when it reboots. you plug it back in.
quick unplug worked for me
thanks
worked exactly how he said it would. i was stuck on this for a long time. thanks :)
Worked exactly what it said.
I unpluged the usb and plgued it back and here we go….
Well i have followed all the steps but still after finishing my iphone start with the initial un-recognize sim condition :S. What do you mean by quickly unpluging, at what stage should i do it?
I tried everything above and in the comments to get past this “waiting to reboot” problem, and none of it worked…
Then i upgraded iTunes to version 8.2.1 (it was version 7 before) so that it would be iphone-compatible…
And it’s just finished jailbreaking!!