How to Jailbreak Your iPhone 3G on OS 3.1.2 Using RedSn0w (Mac)Posted by admin
These are instructions on how to jailbreak your iPhone 3G on the 3.1.2 firmware using RedSn0w for Mac. The Windows version of this tutorial is here. The iPhone 3GS version of this tutorial is here. The iPhone 2G version of this tutorial is here
This tutorial can be used to jailbreak before applying the BlackSn0w unlock. You can find instructions on how to apply the unlock here.
Create a folder on your desktop called Pwnage
Download RedSn0w from here and place it in the Pwnage folder. Likewise, download the latest 3.1.2 firmware from below and place it in the same folder.
3.1.2 (3G): iPhone1,2_3.1.2_7D11_Restore.ipsw
*Note: If you are already on the 3.1.2 firmware and have not jailbroken then you may skip this step.
Once iTunes has finished updating your iPhone to the desired firmware open the Pwnage folder on your desktop and launch the redsn0w application from the redsn0w folder we extracted earlier.
Verbose boot displays detailed information on boot of your device and is generally only needed by developers and advanced users.
Make sure Cydia is selected. For this tutorial we will also select Custom boot logo and Custom recovery logo.
*Remember the rules for boot logos are: RGB or Grayscale format with Alpha channel and dimension below 320×480. If you would like to use the iClarified ones they can be found here:Boot Logo, Recovery Logo
RedSn0w will now guide you through the steps to get into DFU mode. You can find more help with DFU mode here
Once this is complete you will be notified that RedSn0w is done. Click the Finish button. When your iPhone finishes rebooting (5 minutes or so) it will be jailbroken with Cydia on the SpringBoard.