Pwn20wnd released Unc0ver jailbreak for iOS 12 & higher. It was the most successful Jailbreak for iOS 12.
Uncover iOS 11 to iOS 11.4.1 Jailbreak - Uncover tool initially released for iOS 11 to iOS 11.3.1 and then he upgraded tool for iOS 11.4 & iOS 11.4.1 versions too.
Uncover iOS 12 to iOS 12.1.2 Jailbreak - Unc0ver v3.0.0 b29 was updated adding support for iOS 12 - iOS 12.1.2 running all devices except iPhone XS, iPhone XR, iPhone XS Max. Unc0ver v3.0.0 b45 just released adding partial Jailbreak support for iOS 12 - iOS 12.1.2 running iPhone XS, iPhone XR, iPhone XS Max.
Still Unc0ver does not support for iOS 12.1.3 / iOS 12.1.4 / iOS 12.2 or iOS 12.3 beta. Check iOS 12.1.3 / iOS 12.1.4 Jailbreak, iOS 12.2 Jailbreak or iOS 12.3 Jailbreak page for other Jailbreak solutions.
Use same iOS 12 - iOS 12.1.2 jailbreak Guides and Download links to complete the process of unc0ver Jailbreak for iOS 11.4.1 to iOS 11 versions.
There are two methods available for unc0ver Jailbreak.
Unc0ver Jailbreak online method
Unc0ver Jailbreak PC Required method
Online jailbreak is the easiest way, and you can directly download unc0ver Jailbreak IPA to your device. UnCover Online method exclusively available with zJailbreak, Xabsi or iExtras third-party app stores. Use following Online guide if you are iOS 12.1.2 - iOS 11 user.
Note - zJailbreak, Xabsi or iExtras app stores have upgraded the unc0ver support for iOS 12.1.2 - iOS 11. You can download iOS 11 - iOS 12.1.2 Unc0ver jailbreak app directly from these app stores.