The unc0ver jailbreak of iOS 12 - iOS 12.1.2 is now available for all pre-A12 devices including the iPhone 6, iPhone 6 Plus, iPod touch 6G, iPad mini 2, iPad mini 3, iPad mini 4, and iPad Air.
The unc0ver jailbreak has been updated with support for jailbreaking the new iPhone 11/Pro/Max, the iPhone XS/Max/XR, and other devices running iOS 13.0 - 13.3.