1.Power up the phone by pressing the Volume UP + Volume DOWN keys together + Power key.
The device will enumerate with different BOOT OPTIONS.
2.Use the Volume DOWN Key to scroll and Volume UP Key to SELECT.
The device will start up with the logo and power up to a little Android man with Exclamation mark.
4.Press the Volume UP and Volume DOWN Key together at this screen.
The device will display BLUE Text on a Black background.
5.Use the Volume DOWN Key to scroll DOWN and the Power Key to SELECT the option desired . In this case , press the Volume DOWN key till the Wipe data / factory reset is selected and press the Power key to confirm the selection.
6.Use the Volume DOWN key again to select YES – delete all user data and press the PWR key to CONFIRM.
The device will then start performing the Factory Data Reset.
7.Once the Formatting is complete , press the Power key to confirm a REBOOT.
The message rebooting is displayed on the phone. The device will reboot and start the normal power up sequence .