The LG G4 has some killer hardware. It is super fast the only thing really holding it back is the software. It seems to be optimized well enough, but it leaves the eyes wanting more. If you are more of a fan of vanilla AOSP android then you are probably ready to flash Cyanogenmod 12.1 to your G4.
There is now an early alpha build available for the LG G4. This is for the T-mobile and international variants only. So far there are some major bugs. The list of working items is pretty short. It boots, sensors are working, media is questionable, wifi and gps both work. Bugs include no bluetooth or ir blaster, nfc is questionable, and no camera. If you can live without these things long enough to give the rom a try grab it from the link below.
via xda