Follow this step by step guide on how to Unlock iPhone 3G/3GS 3.1.2 Firmware Using BlackSn0w.

Unlock iPhone 3G/3GS 3.1.2 Firmware Using BlackSn0w

. Install the latest iTunes by downloading it from Apple’s website.

2. Restore / Upgrade using original iPhone 3.1.2 firmware by using iTunes.

3. You should connect your iPhone to iTunes and update the 3.1.2 firmware. If you want to restore, download direct link can be found here.

4. Download BlackRa1n RC3 from the here once the updation process gets completed.

5. iPhone should be connected to PC, run BlackRa1n.

6. Click on Make it Rain button.

7. Your Gadget should go into Recovery Mode and you will see GeoHot image instead of default image.

8. Once this process gets completed, you iPhone will restart. Now you will see BlackRa1n icon in iPhone. Tap this icon to launch the application.

9. There you will see Sn0w option. Tap on it to start the unlocking process.

That’s it ! You have successfully Jailbroken and Unlocked iPhone 3.1.2 Firmware with 05.11.07 baseband.