To install TWRP Recovery or any Custom Recovery on LG G6, you must have a Unlocked Bootloader. If your phone doesn't have a Unlocked Bootloader, first of all you should go and unlock the bootloader of your phone. Only after doing so you can safely apply everything that’s detailed in this tutorial.
- Download ADB and fastboot driver for windows or Mac and install it on your PC. This will also install your device driver.
- Download TWRP Recovery for LG G6 H870 (Rename it to recovery.img and save it on ADB folder)
- no-verity-opt-encrypt-5.1.zip for LG G6 – Download (Optional: only if you don’t want to flash SuperSu, some cases flashing supersu is enough to boot)
- Download SuperSu to root LG G6 and copy it to your phone sd card
How to Install TWRP Recovery on LG G6
Install TWRP on LG G6 –
[fastboot flash recovery recovery.img]