If you absolutely insist on having a true untethered jailbreak on your iPhone 4s or iPad 2, you cannot stay on native iOS 9.3.6. Instead, you can leverage a unique quirk in Apple's code signing system.
The device requires a physical connection to a computer running a software utility every single time it boots up. Without the computer, the device will not boot at all. The Reality of iOS 9.3.6 ios 9.3 6 jailbreak untethered
Understanding the distinction between execution environments is critical before attempting to modify your device's filesystem. If you absolutely insist on having a true
If you own an iPhone 6 , you cannot run iOS 9.3.6. You should search for "unc0ver iOS 12" or "Chimera." If you own an iPhone 4s , 9.3.6 is your final OS. Without the computer, the device will not boot at all
The iOS 9.3.6 Jailbreak Legacy: Is an Untethered Solution Possible?