Apple earlier today has released the 3.1.3 update for all iPhone’s and iPod Touch’s. This update only fixes a few minor problems. If you’re jailbroken, you shouldn’t worry about this update… At all. If you’re unlocked, stay away from this update altogether.
- iPod Touch 1G
- iPod Touch 2G (Non-MC)
- iPhone 2G
- iPhone 3G
So, if you have an iPod Touch 2G (MC), iPod Touch 3G, or an iPhone 3GS, then you cannot jailbreak just yet.
If you’re on an iPhone 3G and are using a soft-unlock for your device, stay away from this! Yes, you can jailbreak your device running 3.1.3, but you will lose your unlock, possibly forever.
You need to make sure you have the 3.1.2 firmware IPSW file downloaded. You can find them here.
You also need to make sure that your device is already on 3.1.3, either by updating to it in iTunes, or restoring to it in iTunes. If you’re already jailbroken, and you do an update, nothing will be lost. All of your jailbroken modifications and applications should still be there, but they may not function at all.
The rest of the jailbreaking process is simple. Run your copy of redsn0w 0.9.4, point the program to the 3.1.2 firmware you just downloaded (or already had), and follow the rest of the prompts to jailbreak your device. If you’ve downloaded the 3.1.3 firmware, redsn0w will simply say that it is “unable to recognize specified IPSW”.
Congrats! Your iPhone or iPod Touch running 3.1.3 should now be jailbroken.