How to enter Lenovo P780 Recovery Mode and Hard reset.
- Turn off the device
- Press and hold Volume UP key + Volume Down key + Power key
- Release all key when Android logo appear then you will see Android System Recovery
- Use Volume key to select Menu
- Use Power key to Confirm
Hard reset Lenovo P780
- In Recovery Mode select wipe data / factory reset
- press Power key to confirm
- select Yes — delete all user data, press power key to confirm
- select Reboot system now to finish hard reset
Warning! Make sure to back up important data. The data can not be recovered after perform a hard reset.