This is what worked on my l70
No root needed!
dail 277634#*#
A system menue will show up
go to WLAN Test / OTA setting, select disable.
Reboot
Done!
How ever-
If you cant access this menue, but do have root, you can still fix this:
Start by using root explorer move these files to a different location (make a bacup folder on cdcard)
\ sbin \ lge_fota
\ sbin \ lge_fota_launcher
\ sbin \ lge_gota_launcher
Then , Settings -> App -> Google Services Framework -> Force Close -> Clear Cache -> Clear Data Subscriptions
Reboot
Done!