After we jailbreak 32-bit iDevice, we are able to enter KDFU mode and then downgrade back to iOS 8.4.1 using 3uTools. Here’s the guide for those users who want iOS 8.4.1 back. And then you can jailbreak iOS 8.4.1 using 3uTools.  If you have saved shsh before on your 32-bit devices, you can restore to any iOS version: Downgrade 32-bit Devices to Any iOS Version With SHSH

Compatibility

• iPhone 5, iPad 2, iPad 3, iPad 4, iPad mini and iPod touch 5G

• The iPhone 5C started on iOS 7, therefore, it is not compatible(and never will be).

Requirements

1. Download or update 3uTools to the latest version, V2.20.

2. Jailbreak your device on 3uTools. (3uTools supports the compatible devices running on all iOS versions.)

3. Download the custom ipsw firmware for your device.

iPhone 5:

• iPhone5,1_8.4.1.ipsw

• iPhone5,2_8.4.1.ipsw

iPad 4:

• iPad3.4_8.4.1.ipsw

• iPad3.5_8.4.1.ipsw

• iPad3.6_8.4.1.ipsw

iPad 3:

• iPad3.1_8.4.1.ipsw

• iPad3.2_8.4.1.ipsw

• iPad3.3_8.4.1.ipsw

iPad 2:

• ipad2.1_8.4.1.ipsw

• iPad2.2_8.4.1.ipsw

• ipad2.3_8.4.1.ipsw

• iPad2.4_8.4.1.ipsw

iPad mini:

• iPad2.5_8.4.1.ipsw

• iPad2.6_8.4.1.ipsw

• iPad2.7_8.4.1.ipsw

iPod 5:

• iPod5.1_8.4.1.ipsw

Process

Step 1 Enter the device into KDFU mode. You can add repo: http://repo.tihmstar.net, then install kDFUApp, check here for details. But this method does not support all the compatible devices or iOS 10+. For the rest incompatible devices, you can refer another tutorial to enter kdfu mode: How to Enter KDFU Mode Using Futurerestore?  After that, the screen will turn to black and 3uTools will detect the device in DFU mode. 

Step 2 Head to “Flash & JB” -> “Pro Flash”, then click “Import Firmware” to import the downloaded custom firmware.

Step 3 Click “Flash” on the right side, there will be the pop up telling you there are risks to flash a custom firmware. Just click “Flash Anyway” to start the process.

Step 4 Then 3uTools will automatically downgrade your device to iOS 8.4.1, please wait patiently and keep the good connection.