Lenovo P770 hard reset
Power off your Lenovo P770 phone.
Press Volume UP + Power on the phone. In the recovery menu use Volume buttons to select
Wipe data/Factory reset and use power to confirm.
You can also select wipe cache partion to Reset your Lenovo P770 phone.
Press Power and choose recovery.
Press and hold Volume down + UP + POWER buttons to get into download mode.
the soft way:1. From the Home screen, press the Menu Key and touch Settings.
2 Touch the Backup and RESET
4 Touch Factory data reset.
5 Touch Reset phone.
6 Touch Erase everything.