https://wccftech.com/how-to-jailbreak-ios-12-ios-12-1-2-using-unc0ver-jailbreak-tool-and-install-cydia-tutorial/

As we have previously covered, unc0ver jailbreak for iOS 12 – iOS 12.1.2 has been released. If you’re interested, you can install it on your compatible iOS device right now. In addition, if you don’t know how, we have prepaid a detailed tutorial so you can make use of it. Furthermore, we will also let you know how you can install Cydia on your iPhone or iPad. Let’s jump right into it.

Before we head over to the details, you should know that the unc0ver jailbreak for iOS 12 – iOS 12.1.2 works only on devices with an A8X through A11 devices. This states that all devices up to the iPhone X can be jailbroken using the tool. To be precise, devices mentioned below are compatible with the unc0ver jailbreak for iOS 12 – iOS 12.1.2.