Hard Reset LG Optimus L3 II E425

First method:

1. Make sure, that your phone is off.
2. Then press and hold Volume Down + Home button + Power button.
   
3. Release them, when Home button will blink.
4. Now your phone will reboots.

Second method:

1. Make sure, that your phone is on.
   
2. From the Home screen select Menu.
3. Now choose Settings -> Back up and reset -> Reset device -> Delete all.
4. Confirm all informations, and wait until your phone will reset and reboots.
5. Success!