Definitive Tutorial to CM13 on LG G2 D802
NOTE: You need to be able to reach download mode at least (Power + Volume Up).
If you don't you need to go search
recovery
Clean Factory Reset for LG G2 (802)
TL;DR: If you can't enter recovery (but you can enter download mode) and you've installed Lollipop stock back from CM13,
Boot in Recovery Mode on LG G2
To boot in recovery mode on a LG G2, you need to do the following steps:
1. Power off your phone. Don't just