In order to hard reset a ZTE Score M, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
ZTE Score M device will be brought back to the default configuration of a brand new device.
1. Power up the phone.
2. Press and hold the Volume Down, Camera and Power buttons.
3. Press Menu when the Android logo appears. A new menu will open.
4. From it, use Volume buttons to scroll options and Power/Home/Menu to confirm your choice.
5. Select Yes and Reboot System Now.