It will work on 3.1, 3.1.1, 3.1.2... why not just upgrade to 3.1.2 now and then jailbreak? It works.... do it..Is this for 3.1 firmware?? Will it work on windows?
This will work for 3.1.2 iPhone 3g however the 3g is the most flakey of the family that he released. Just keep trying different things / repeating what you are doing and it will eventually work.So apparently, this won't jailbreak a 3G iPhone which has been upgraded to 3.1.2. I've tried many times and it just puts the iPhone in recovery mode and does nothing.
Here's a tutorial: http://www.redmondpie.com/jailbreak-iphone-3.1.2-firmware-with-blackra1n-zni327/Sorry for the dumbness... But so you have to run through iTunes? Does it need to be in recovery mode? Alls I want is the jailbreak so does this mean I won't lose signal etc etc? I'm in work at the moment so havnt done anythin yet. Thanks oh and I have a 3gs on 3.1 unbroken.