Install TWRP in LG G2 D800 Android 5.0.2

[AC Question]

I have rooted LG G2 D800 with android 5.0.2. I am trying to install twrp but couldn't. The phone is not going into fastboot mode it is going only into download mode.
Please guide me how to install twrp in download mode.

I am planning to install custom rom.

thanks

 

[jasonandrews25788]

try this guide:
https://forum.xda-developers.com/showthread.php?t=2449670