It was a semi-untethered jailbreak, meaning it required an app to be run on the device after every reboot to re-enable the exploit.
"Semi-untethered" means that if your device reboots, you will need to re-run the Phoenix app on your home screen to re-enable the jailbreak. Supported Devices phoenix jailbreak ios 9.3.5 ipa download
Connect your device to a PC or Mac via USB and ensure it is "trusted". It was a semi-untethered jailbreak, meaning it required
Open the Phœnix app on your home screen and tap "Prepare For Jailbreak" to begin the process. Key Limitations It was a semi-untethered jailbreak