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 make sure that your phone is turned off, if not hold down Power button.
2. Then press Power button and Volume Down and Home Button button to start the whole process.
3. When LG logo appears you can release the buttons.
4. Wait a moment and you will see recovery mode.
5. Using Volume buttons to navigate go down and select wipe data/factory reset with your power button.
6. And this is it! hard reset is finished.