The user notes that the ROM is an early build and not very stable. Also, it is only intended for the F400S variant of the G3.
If you have a F400S G3, one that you don't mind bricking or potentially making it unusable, then you can try installing the update from the source link below.
If you don't want to do that, you can just watch the video below.
Hi thanks for the new! I'd like to update my device (G3) to android 5.1.1 with custom Rom, I found this list : http://androidcure.com/best-custom-roms-for-lg-g3/ and don't know whether it would be good idea or not! If you can tell me, it would be gre...
If you dont have budget issue, go for G3 best phone on earth.
LG please bring this to G Pro 2