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How to downgrade iOS11.3.1 to iOS 10.X on A7 devices with SHSH blobs. With the latest ios11.x exploit it is now possible thanks to noncereboot1131 ipa file downgrade ios11.x In this post, you can read how to downgrade using iOS 10.3.3 OTA update files on A7 devices. It may also work in other devices like iphone 6 and iphone 6 plus. It is really simple. First of all this tutorial is for Linux and macOS, so if you are using Windows, you can use futurerestore port, but commands will be littlebit diffrent.
How to restore to iOS 11.3.1 with SHSH BLOBS
What will you need?
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SHSH blobs
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two iPSW files
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brain
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computer
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iphone or ipad ios11.3.1 or any other empty_list or multi_path iOS exploit
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internet
How to do that?
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Download futurerestore
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Create folder downgrade and put futurerestore files to it
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Download iOS ipsw for the version you want to downgrade and for iOS 10.3.3 (from here)
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Download BuildManifest OTA for your device from here and put it in downgrade folder
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Rename iOS 10.3.3 ipsw file to zip and extract it
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Search for baseband (like
Mav7Mav8-7.60.00.Release.bbfw) -
Search for sep (like
sep-firmware.n53.RELEASE.im4p) -
Put these files into downgrade folder
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Put your SHSH blob without APNonce to downgrade folder
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Put iOS you want to downgrade to downgrade folder
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Install and run noncereboot1131 on you device
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Open you shsh file and search for the generator like
0x25abbc5cee08a593 -
Put it in noncereboot1131 and apply it
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Now do not turn off your device and open terminal
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Type cd
/path/to/your/downgrade/folder -
And run
./futurerestore_linux -t yourshsh.shsh2 -b baseband.bbfw -p BuidManifestOTA.plist -s sepfileforyourboard.im4p -m BuidManifestOTA.plist -d ipswtodowngrade.ipsw - And press enter. Now your device should reboot to recovery and start restoring.
Notes:
It must be mentioned that you need ERASE (full blobs) not just OTA blobs for this to work. The versions that are fully compatible with the iOS 10.3.3 SEP are iOS 10.2-10.3.3.
More:
Downgrade iOS 10.3.3 to iOS 8.4.1 – Jailbreak
iCloud – How to download all your photos & videos on Mac
Screen and Battery Replacement iPhone X
