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. For a start hold down power button to switch on you device.
2. Then press call key to open phone's Dialer or go to Standby screen.
3. Nextly type in this code: 2945#*# and press call key again.
4. Now your phone will restart. Congreatulations, you finished hard reset of you LG.