Previously we informed you the release of Redsn0w 0.9.14b1 plus the download links based on your OS together.
And the update version of Redsn0w brings the improvement to downgrade both iPhone 3GS or iPhone 3G 06.15.00 baseband to 05.13.04 baseband to further unlock your device and then fix the GPS issue, not only that the DFU IPSW feature also included in the release.
- Keep in mind the baseband downgrade steps we are about to follow can be applied only to iOS devices compatible with iPad baseband 06.15.00, which are iPhone 3GS and 3G.
- iOS devices other than then the above mentioned, like iPhone 4, iPhone 4S should not use it.
- If you are asking yourself whether updating your iPhone 3GS / 3GS to 06.15 and then downgrade it back to 05.13.04 can unlock your iOS device using Ultrasn0w. The answer is yes if you are using 3G but for 3GS uses the answer is maybe.
- You are able to downgrade to 05.13.04 from 06.15, albeit you never even used 05.13.04 before.
How to Downgrade iPhone 3GS, iPhone 3G 06.15.00 baseband To 05.13.04 Baseband with Redsn0w
Backup your important data first using iTunes.Step 1
Step 1. Now unzip the Redsn0w zip file you downloaded, or mount the image for Mac OS users.
Step 2. Open the Redsn0w -- right click on it, then Run As Adsministrator for Windows users.
Step 3. Select the Jailbreak button, then click on it for Redsn0w to start preparing the jailbreak data.
Step 4. Check install iPad baseband menu, then Un-check (deselect) Cydia if you have it installed already. Then Redsen0w will give you warning, read it attentively then hit Yes. And then Next.
Step 5. Now connect your iPhone 3G or iPhone 3GS to your computer, be sure it's OFF. Slide to power off your device. This is important to prevent you from problem when ramdisk is running. Then hit Next.
Step 6. Now you will be guided to put your iPhone into DFU mode. Just follow the instructions written on the screen to do so.
Step 7. Once your iOS device is in DFU mode, you will notice that Redsn0w will start jailbreaking your iPhone. Once the jailbreak is entirely completed, you will be told the rest of the process takes place on your iPhone or iOS device.
The Pwnapple will be running on your device now, now you need to the Flashing Baseband step. This one takes very long time to finish. Therefore just wait till the entire process is completed. Your iPhone will take reboot, once the Ramdisk has fully finished its job.
Once your iPhone has finished rebooting, you will notice that it is running 05.13.04 baseband. Therefore you are free to unlock the device -- iPhone 3GS and iPhone 3G using Ultrasn0w. To unlock your device, simply launch Cydia, let it update, then search for Ultrasn0w, once you found it then install it.
Anyway if you experience no signal or crashes issue after baseband downgrade.That's How to Downgrade iPhone 3GS, iPhone 3G 06.15.00 baseband To 05.13.04 Baseband with Redsn0w and hope it works for you.