Connect your iP4S to computer via USB (not really necessary before step 6)
Unzip 4S 6.1.3 Downgrade Windows.zip to folder “downgrade” at desktop
Install libimobiledevice from rar
Unzip Trident-Kloader to desktop, same folder as step 2
Unzip Cydia Impactor to desktop
Run Cydia Impactor
Drag unzipped Trident-Kloader.ipa to Cydia Impactor
Sign in with your iTunes account (or create disposable one and use that)
After Impactor is done, click on new icon on your iP4S.
Click “Start”
When “Start” goes dim, open command prompt on your pc
On your computer, go to folder you’ve entered on step 2, for example C:UsersmycomputerDesktopdowngradelibimobiledevice
Enter “idevicediagnostics sleep” (without brackets) and hit enter
Phone goes black, iTunes might appear in recovery mode, just close iTunes.
Click home button (mine reacted at first click, you might need to click few times). This is when you’ll hear a sound that your pc has recognized your iP4S.
Open command prompt if you closed it already
Go to folder you’ve entered on step 2, for example C:UsersmycomputerDesktopdowngradelibimobiledevice
Enter “idevicerestore.exe -e custom.ipsw” (without brackets) and hit enter.
