Already tried factory reset same problem
My phone is ANEUWH LG G2 Europe Open 32GB, tried downgrade to this B version on storagecow:
Europe OPEN 32GB KitKat D80220B_00.kdz1662200KB
But then knockON do not work, knockOFF works
Also tried to disable VoiceMate and Hangouts didn't help....
Any solution to this? Thanks