A hard reset, also known as a factory reset or master reset, is the restoration of a device to the state it was in when it left the factory.
All settings, applications and data added by the user are removed.
The term is often heard in reference to smartphones and tablets but laptop and desktop computers, as well as most other electronic devices, can usually be restored to factory conditions.
1. To begin lets turn off your device by holding down power button.
2. Now press and hold Volume down button and power button at the same time.
3. Wait for LG logo to appear and let go off the buttons.
4. Now you will enter recovery mode screen.
5. Using you volume buttons navigate on wipe data/factory reset and press Power key to select it.
6. This is it! Hard reset is over and your phone will restart now.