1. Turn off your phone.
2. Press and Hold VOLUME DOWN and Power Button simultaneously and wait for it to power on but keep holding the button until you see the engineering mode
3. Engineering mode will appear.
4.Select CLEAR eMMC, press Volume rocker to navigate and press the POWER Button to confirm your selection
5. Reboot your phone.
2. Press and Hold VOLUME DOWN and Power Button simultaneously and wait for it to power on but keep holding the button until you see the engineering mode
3. Engineering mode will appear.
4.Select CLEAR eMMC, press Volume rocker to navigate and press the POWER Button to confirm your selection
5. Reboot your phone.