Jailbreak iPhone 3G/3GS 3.1.2 Firmware

• Author: Ylva Ng
• Filed under: Mobile
• Date: Dec 11,2009

Note for iPhone 3G and 3GS: Do NOT upgrade to iPhone 3.1.2 with blackra1n if you want to keep your unlock as doing so will result in upgrade of your baseband which will make it almost impossible for you to unlock.

Step 1: Download and install the latest version of iTunes (download here)

Step 2: You will now need to first update/restore to the original iPhone OS firmware 3.1.2 on your iPhone by using the latest version of iTunes.

Download 3G iPhone OS 3.1.2 for iPhone 3G

Download 3GS iPhone OS 3.1.2 for iPhone 3GS

Step 3: Download blackra1n for Windows

Step 4: Start blackra1n app. If you are on Windows 7 or Vista, run the app with “Windows XP Compatibility” mode by enabling it from the “Properties” tab to avoid any errors during the jailbreak process.

Step 5: Click on “make it ra1n”:

Step 6: Let the app do its thing and wait for the phone to automatically reboot.

Step 7: You should now have “blackra1n” in the list of applications on your iPhone. Run “blackra1n”, download Cydia and let it install it.

Step 8: Finally reboot your iPhone. Voila! You should now have fully jailbroken iPhone or iPod touch running on firmware 3.1.2.

Note: Do not update your iPhone to OS 3.1.2 yet if it is jailbroken or unlocked on firmware 3.1. Wait for the new jailbreaking and unlocking tools before updating your device or you may loose the capability to jailbreak or unlock your device in the future. You have been warned!