Use a tool like Sideloadly or AltStore (if compatible) to install the IPA file from your computer to your iOS device.
: Once inside the app, the user taps "Prepare For Jailbreak" and chooses "Use Provided Offsets" . The device then reboots into a jailbroken state with Cydia installed. Historical Significance and Maintenance phoenix jailbreak ios 9.3.5 ipa download