It should be noted that the jailbreak is still not perfect jailbreak, if the jailbreak permission fails after a restart, you need to re-use IPA installation tool Cydia Impactor Jailbreak APP installed on the phone to take effect.
If your device model is iPhone 5S after the version, while the system is still in iOS 11-11.1.2, then this jailbreak, but from the actual experience of many users, the interest in jailbreak is more and smaller.