Enviroment:
1. iPad mini 1: A1432; IOS version 9.3.5
2. Kali Linux 2017.1 (64bit)
Steps:
1. Download Cydia Impactor from http://www.cydiaimpactor.com/ and unzip it. what I used was Linux 64 bit version. (Pic01)
2. Donwload the IPA file Phoenix3.ipa from https://phoenixpwn.com/download.php and put it to the unzip folder (Impactor64_0.9.41). (pic02)
3. Check the hash of the IPA file. It should be "616ef9da4796ae7d490fb7b0e31cd85bb48e2732d2436c7710e79716e2b80e61" (pic03)
4. Connect the iPad mini 1 to Kali Linux.You should see the iPad icon on the desktop. (pic04)
5. Double click "Impactor". The device should be loaded automatically (pic05)
6. Click "Device"->"install Package..." (pic06)
7. Select "Phoenix3.ipa" and click "Open" (pic07)
8. Enter the apple id and password (pic08)
9. The installation will start. (pic09)
10. if you get an error "Provision.cpp:81, ios/submitDevelopmentCSR = 7460 You already have acurrent iOS Development certificate or a pending certificate request"(pic10), then click "xcode"->"revoke certificate" (pic10-2)
11. After the installation is done, you should get the Phoenix icon on your iPad.(pic11)
12. Go to "Settings > General > Device Management" and trust the certificate. (pic12)
13. Run the app and tap on "Prepare For Jailbreak". Following the screen instruction to install Cydia. (pic13)
14. Now you can run Cydia. (pic14)
Please note:
1. Whenever you reboot, open the app again and tap on "Kickstart Jailbreak".
2. Whenever the app expires, install it again with Cydia Impactor.
References:
1. https://phoenixpwn.com/