Originally Posted by bender_007
You should try flashing a 4.2.2 kdz and right after it just flash 4.4.2 (don't do a factory reset)
We all have the same situation. You did a factory reset after upgrade ?
Nope. I only upgrade my LG G2 with code 6RO from 4.2.2 with ota to 4.4.2 v20b or c after i can't found more updates and then i flash v20d 6DE Open 16gb via offline mode after of that my phone is rooted.
I have other mate than have same problem. He have LG G2 of Orange and this company don't have v20d then i flashed his phone with v20c to v20d for get knock code and after of this rooted too.
I think than the problem is ota update and after flashing a rom.