Hard Reset LG F220K Optimus GK

First method:

1. Please first check, that your phone is off.
2. Then press and hold Volume Down + Home button + Power button.
   
3. When LG logo appear, then release holded buttons.
4. Wait a minute until your phone 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