How to jailbreak an iPhone 3G?
I bought an iPhone 3G on ebay.
Unfortunately it has a sim-lock whereby I can't use it.
So I tried to jealbreak it to remove this lock.
Therefore I took the latest version of redsn0w (0.9.15) and used the iOS firmeware 4.2.1
But after entering the DFU mode nothing happened - the screen stayed black.
So I used another (older) version of redsn0w (0.9.6) and tried it again.
This time it seemed to work: commands were visible / got executed on the iPhone.
Suddenly the process stopped and didn't continue. After rebooting I recognized the jailbreak failed.
The last lines before the jailbreaking process stopped were:
** Checking volume information
** The volume Data appears to be OK.
Mounting rootfs as read-write...
Transfering control to jailbreak...
dyld: Library not loaded: /System/Library/PrivateFrameworks/MobileKeyBag.framework/MobileKeyBag
Referenced from: /jailbreak
Reason: image not found
Does anyone have an idea why the jailbreak failed and how I can fix this?