This i have read on XDA, but was not keen on doing it till st_7 mentioned it here. all credits go to him.
To receive the KitKat ZVC OTA you have to COMPLETE stock without root and Stock Recovery a MUST.
Without the above i dont suggest anybody to update if you get OTA, but then you are welcome to try just dont
blame anyone here for a brick !!
Access phone settings
Access Apps
Go to all, In all access Google Services Framework
Use clear data and clear cache
Once the Data and Cache of Google Services Framework is cleared
Access System Updates
Access Update LG Software
You Should get a screen with dates 1/1/1970,
In the same screen Check for update. now i dont have that screen since i got the update after many tries.
Got the update by Force
I got this after a few tries, just keep doing it till you get it.
Will update about the GSM unlock, root, Wi-Fi hotspot & other essential information.
Cheers