Let’s downgrade i Phone 3GS / 3G baseband to baseband to fix GPS and unlock with Ultra Sn0w…We assume that you’ve read the important part above and have backed up your personal data using i Tunes.Download Red Sn0w and the firmware that your i Phone 3GS or i Phone 3G is currently running: checkbox, Red Sn0w will present you with a warning read it carefully and click Yes.
This step is very important to avoid mount problems when the ramdisk is running! Now Red Sn0w will guide you through the steps to put your i Phone into DFU mode.
Follow the on-screen instruction to put your i Phone into DFU mode.
As soon as your i Phone enters DFU mode, Red Sn0w will begin jailbreaking your device.
Once the jailbreak process is completed, Red Sn0w will tell you that rest of the process will be performed on the device.
You see the Pwnapple running on your i Phone, you’ll eventually get to the “Flashing Baseband” step.
THIS STEP TAKES A VERY LONG TIME to complete and there won’t be any feedback while its running. When the ramdisk has done its job it will reboot the phone on its own.
After the reboot, your i Phone 3GS will be running baseband.
You can unlock your i Phone 3GS/3G, Open Cydia, let it update, search for Ultra Sn0w and intsall it. don’t forget to share your experience in the comments section below…If you’re facing ‘No Signal’ or crashes after downgrading your i Phone 3GS/3G baseband from i Pad baseband to , don’t worry you can fix it in a few steps mentioned below: Don’t forget to hit the +1, Like and/or Tweet button if you like the post.
You can follow us on Google Plus, Twitter (@iphone_heat), Facebook (i Phone Heat Dot Com), and Subscribe to RSS Feed to receive latest updates.