How to Downgrade iOS 9.3.5-10.3 to iOS 9 with iDeviceReRestore?

iOS hacker alitek123 has just released his highly anticipated iDeviceReRestore downgrade tool. It lets you downgrade iOS 9.3.5-10.3 to 9 without requiring a jailbreak.

Follow the complete step by step tutorial below.

Before you proceed, keep the following things in mind

• If local SHSH blobs are not present, iDeviceReRestore will try to retrieve blobs from Cydia’s server.
• If your SHSH blob is not working, try fetching it from Cydia instead.
• If your device is stuck in Recovery mode (iTunes and USB cable logo), your blobs are invalid. Hence, you will not be able to downgrade.
• This tool is still in beta development stage. Minor errors are to be expected.
• This tool doesn’t have a proper GUI so you need to use Terminal commands.
• If you are on Windows, you can still use this tool. Just use VirtualBox to set up an Ubuntu or macOS Virtual Machine.

Which blobs work with iDeviceReRestore?
Now, this is the tricky part. This tool requires specific SHSH blobs to work properly.

To verify your SHSH blob, open your SHSH blob file and look for a string starting from MII below <data>. If it matches the string given below, you can go ahead.

• If your APTicket starts with MIIKkjAL, MIIKmDAL or MIIKlTAL, your SHSH blob is valid.
• If your APTicket starts with MIIKqDAL, your SHSH blob is invalid.

If you haven’t saved your blobs correctly, it will not work. Generally, your blob should be fine if it doesn’t contain a nonce.

Which devices are compatible withe iDeviceReRestore?
Here’s the complete list of supported 32-bit devices –

• iPhone 4s
• iPhone 5
• iPhone 5c
• iPad 2G
• iPad 3G
• iPad 4G
• iPad mini
• iPod touch 5G

64-bit devices are not compatible with this tool.

Requirements

• Download iDeviceReRestore (Click here to download mac version.)
• Valid SHSH blobs for your target firmware.
• A compatible 32-bit iOS device
• A computer running macOS/Linux
• A USB cable

Step 1 Download iDeviceReRestore downgrade utility tool from the link given above. Extract its contents in a folder to your desktop.

Step 2 Put your .shsh blob file in the shsh folder.

Step 3 Download your correct destination iOS version from ipsw.me. Transfer the downloaded IPSW file to the iDeviceReRestore folder.

Step 4 Connect your device to the computer with a USB cable.

Step 5 Since this tool is based on DFU Restore, put your device in DFU mode. Keep these buttons pressed until you get a black screen.

•  Turn off your iPhone, iPad or iPod.
• Press Power button for 3 seconds.
• Press Home button (or Volume button for iPhone 7/7 plus) and Power buttons together for 10 seconds.
• Release the Power button while still keeping Home button (or Volume button) pressed.
• Status: Restore Finished

Step 6 Now you need to execute the tool. Open Terminal and execute the following command –
./idevicererestore -r <file name of destination firmware>.ipsw

For the iPad 2, this command will look something like this  –

./idevicererestore -r iPad2,2_9.3.1_13E238_Restore.ipsw

Step 7 It will now perform a lot of steps automatically. Wait and let it do its thing.

Step 8 If you have performed the steps given above correctly, you will get this message- 
Got status message
Status: Restore Finished
Cleaning up…
DONE 

Step 9 Your device will now be successfully downgraded to a jailbreak-able iOS 9 firmware version.

Step 10 Use Home Depot IPA to jailbreak your device running iOS 9. 


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