How to Downgrade iOS 10.2.1 to 10.2 for iPhone 5s

How to Downgrade iOS 10.2.1 to 10.2 for iPhone 5s.

First, restore to iOS 10.3 beta 1.

Next, we use the following shsh file of apnonce.

1) 9e4c518009d00df190a450b3b47691768812360c
2) 9f4aeec726e7c682339ddb3c6c2dec52662dc517
3) a3eb70ccb7f4005d2789604f7724c6f37b4df096

Rename each file to 1.shsh 2.shsh 3.shsh.

Download iOS 10.2.1 IPSW and retrieve three files, BuildManifest.plist, Mav7Mav8-7.21.00.Release.bbfw, sep-firmware.n51.RELEASE.im4p.

Note: For iPhone 6,1 n51ap

Copy the iOS 10.2 IPSW file and three files to a folder with futurerestore.

You can downgrade by executing the following command.

sudo ./futurerestore_linux -t 1.shsh -t 2.shsh -t 3.shsh -b Mav7Mav8-7.21.00.Release.bbfw -p BuildManifest.plist -s sep-firmware.n51.RELEASE.im4p -m BuildManifest.plist -w iPhone_4.0_64bit_10.2_14C92_Restore.ipsw

It does not function except iPhone 5s. (I don't tried cause I don't have iPad Air1)

Links:
futurerestore-latest
http://api.tihmstar.net/builds/future...

iPhone 5s IPSW
iOS 10.3 beta 1
http://appldnld.apple.com/ios10.3seed...

iOS 10.2.1
http://appldnld.apple.com/ios10.2.1/0...

iOS 10.2
http://appldnld.apple.com/ios10.2seed...

Japanese descriptions
http://ichitaso.com/iphone/ios-10-2-1...

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Make futurerestore available on Ubuntu 16.04

1) Install git
sudo apt-get update && sudo apt-get upgrade && sudo apt-get install git

2) Install Library-iPhone
git clone https://github.com/elrhk/Library-iPhone && cd Library-iPhone && chmod +x autobuild.sh && ./autobuild.sh

3) Since the location of libzip.so.4 is displayed, create a symbolic link accordingly
sudo updatedb && sudo ldconfig

locate libzip.so.4

sudo ln -sf /usr/lib/x86_64-linux-gnu/libzip.so.4 /usr/lib/libzip.so.2

4) This will close the terminal once.

5) Re-Install libimobiledevice
sudo apt-get purge libimobiledevice* && sudo apt-get install libimobiledevice*

6) Remove unnecessary Library-iPhone
rm -fr Library-iPhone

7) Reboot

8) Log in with CUI by pressing "Ctrl + Alt + F1"
sudo rm /var/lib/dpkg/lock

9) sudo apt-get install ubuntu-desktop

10) Please give execution authority to futurerestore before executing.

chmod +x futurerestore_linux

Done

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How to run futurerestore on Mac

macOS Sierra Xcode 8.2

https://ghostbin.com/paste/5m5ym