LG SU 640 Pettan lock Solution
- Handset has to be switched off.
- Press Volume Down + Power button for about 10 seconds.
- When LG logo will appear on screen release both buttons.
- Whole process has to be confirmed to do it press Power button twice.
- Device will restart, after that you can work on device.
WARNING !
Hard Reset will erase all of your data
Hard Reset will erase all of your data