How to Downgrade iPhone 4s from IOS 9.3.5 to IOS 6.1.3

 How to Downgrade  iPhone 4s from IOS 9.3.5 to IOS 6.1.3

Note: This will not be a dual-boot downgrade that can be performed without a computer. JAILBREAK REQUIRED!

Step 1

Open Cydia, go to Sources, click Edit, and in the upper left corner, you'll find the Add option. Enter https://lukezgd.github.io/repo. Once added, find the kDFU app and install it. Once the installation is complete, open the kDFU app, select the Find Bundle, Download iBSS, Find iBSS, and Pwn iBSS options, and click Enter kDFU.

Step 2

Download the Legacy IOS Kit from this link:  https://github.com/LukeZGD/Legacy-iOS-Kit.  If you have a MacOS computer, choose the MacOS version. If you have a Linux computer, choose the Linux version. Now open Finder in MacOS and extract the file. After extracting, rename it to ioskit. Open Terminal and enter cd downloads, cd ioskit, ./restore.sh. A menu should now appear. From this menu, select Restore/Downgrade and choose IOS 6.1.3. Now download IPSW and select Start. If it asks about jailbreak, select No.

Step 3 

Once the process is complete, configure the system without logging in to your Apple ID. Now jailbreak it using p0sixpwn. Go to Safari and visit tlsroot.litten.ca and download one Signed IOS Bundle certificate (IOS 5+). Then go to duckduckgo.com (Google.com doesn't work) and enter Apple PKI and install two certificates.

You can also repair AppStore and iTunesStore, you can find the full guide here  https://blog.zmieszotech.pl/2025/12/jak-naprawic-appstore-na-ios-6.html