Legacy developers have occasionally released untether packages on Cydia (such as community modifications of the "Ties" or "Daibutsu" exploits) that attempt to automate the exploit at boot time on iOS 9.3.5. However, these are highly volatile, can cause boot loops, and are generally less stable than downgrading to iOS 8.4.1. ⚠️ Warning: Avoid Fake Untethered Scams
If your device restarts, the jailbreak is disabled. You must open an app on your device to re-enable it. ios 9.3.5 untethered jailbreak
Yes, the Phoenix jailbreak fully supports 32-bit devices, including the iPad 2. You must open an app on your device to re-enable it
The community has moved on. The last great untethered jailbreaks were for iOS 9.1 (Pangu) and iOS 8.4.1 (Etason). For iOS 9.3.5, the "Holy Grail" remains a myth. The last great untethered jailbreaks were for iOS 9
On your device, go to Settings > General > Device Management (or Profiles), find the profile associated with your Apple ID, and click "Trust".
iPhone 4S, 5, 5C; iPad 2, 3, 4; iPad Mini 1; iPod Touch 5. iOS Version: Specifically 9.3.5 (or 9.3.6).
Note: This does not actually downgrade; it upgrades you to 9.3.6 and patches the kernel.