I've got an LG G2 D802 that has received the OTA update to 4.4 and is running fine.
I've since rooted it and i was looking at installing a custom recovery before flashing a new Rom......
I have tried to use Flashify after downloading TWRP recovery through Flashify but after rebooting it comes up with the following in the top left of a black screen;
Error: Boot Certification Verify
810 - secure booting error
860 - cause: boot certification verify
Then the screen goes off, ive left the phone and tried to reboot by just holding down the power button for 10 seconds but on boot i just get the same message then it dissapears and i get a black screen again
Any help or pointers would be great - thanks in advance