A full reset is sometimes referred to as a hard reset. Perform a full reset when you want to clear all settings, programs and data from RAM.
Caution if you perform a full reset, your LG Smartphone returns to its default settings and looses all information that is not recorded in ROM.
(CAUTION! If you perform a factory (full) reset, all user applications and user data will be deleted. Please remember to back up any important data before performing a factory reset.)
To perform a factory (hard) reset:
Turn the power off.
Press and hold the following keys for over 5 seconds: Down volume key + + .
When the power turns on, release these keys