Now you can enjoy the latest Android 7.1 Nougat on your smartphone.Now Download the Android 7.1 Nougat unofficial Lineage OS For LG G4. You need a Custom Recovery like TWRP to Install CyanogenMod 14.1 or Lineage OS for Motorola LG G4.
This will work on LG G4 , Don’t Try this in Any other device.
Charge your phone up to 80% or 70%.
Backup your current Rom before doing this step using TWRP or CWM or any Custom Recovery.