Unc0ver v3.5.0 released to support iOS 12.4, the latest firmware from Apple

unc0ver support apple iphone 5s - iphone X 

Unc0ver v3.5.0 can jailbreak iOS 12.4 on A7-A11 devices, but A12(X) devices are still excluded at this time..

download jailbreak ios 12.4 for pc 

https://github.com/pwn20wndstuff/Undecimus/releases

download jailbreak ios 12.4 without pc

http://tweakboxapp.com

open https://www.tweakboxapp.com/ from safari
then install unc0ver via tweakbox app