1. First try to do a soft reset . Click menu locate either storage or privacy then click
factory data reset . If this doesn't work try this.
2. Turn the phone off , if the phone is frozen pull out the battery .
3. Hold the power button along with the volume down button intill the android logo comes on with a triangle shape ,release all buttons
4. Select: wipe data/factory reset
5. Use power button to confirm your selection