Hard Reset LG Optimus Z
- Device must be switched off to succeed this operation.
- Then press and hold Volume Down + Home button + Power button.
- Release them after 8 seconds, when LG logo appears.
- Now your phone will restart and Master reset will start automatically.
- Done, you can use your device now.
Help! This doesn't work
Hard Reset will erase all of your data
All described operations you are doing at your own risk.