Free Tools: How to Downgrade Your iPhone 3GS 3G Baseband for Unlock Windows

Saturday, November 12, 2016

How to Downgrade Your iPhone 3GS 3G Baseband for Unlock Windows

Step One
Create a new folder on your desktop called Pwnage.
In the folder place the current firmware of your device (which can be downloaded from here) and the latest version of RedSn0w (from here).
Extract the RedSn0w zip file by double clicking it.

Step Two
Launch the redsn0w application from the redsn0w folder we extracted earlier. You can do this by right clicking the executable and selecting Run as Administrator contextual menu.

Step Three
Once RedSn0w opens click the Extras button.

Step Four
Choose Select IPSW from the Extras menu.

Step Five
Navigate to the Pwnage folder on your desktop, choose the firmware ipsw we downloaded earlier, and click Open.

Click OK to confirm your selection.

Tell RedSn0w whether you have a newer or older model iPhone 3GS.

Step Six
Press Back to get back to the main menu then click the Jailbreak button.

Step Seven
RedSn0w will now prepare the jailbreak data.

Step Eight
Check the Downgrade from iPad baseband checkbox, disable Cydia if you already have it installed, and click Next proceed through the normal DFU ramdisk steps.

Step Nine
Plug your iPhone into the computer and make sure its OFF then click the Next button

Step Ten
RedSn0w will now guide you through the steps to get into DFU mode..
Hold down both the Home button and the Power button for 10 seconds.

Release the Power button and continue holding the Home button until RedSn0w detects the device.

Step Eleven
Your iPhone will now be exploited with limera1n and reboot

Step Twelve
Your iPhone will now be rebooted again and RedSn0w will begin uploading the new RAM Disk and Kernel.

Step Thirteen
RedSn0w will now inform you that its work is done. The rest of this process will take place on your device.

Step Fourteen
After showing some scrolling text, your iPhone will display the pwnapple icon and say Flashing Baseband. THIS STEP TAKES A VERY LONG TIME to complete and there won’t be any feedback while its running. Please just let it be for the next 3-8 minutes! When the ramdisk has done its job it will reboot the phone on its own.

Step Fifteen
Once the phone has rebooted you will be on the 05.13.04 baseband. .