A Hard Reset reverts a phone to its original settings and a clean OS (Operating System) removing all data and information added to the cell phone by the mobile phone user.
In essence a Hard Reset erases everything from the phone and puts the phone back to like new condition as though it’s brand new right out of the box.
1. First thing you will have to do is switching your phone OFF.
2. Now wait a moment and press and hold power button with volume down button.
3. When you will see LG logo on your screen, you can release the buttons.
4. Then your phone will boot automatically into recovery mode.
5. To navigate here you will have to use volume buttons and power button to select option.
6. Go to wipe data/factory reset option and select it, after that your phone will perform hard reset. Goo job!