follow this steps and fix it. God bless you
the "Power" or "Unlock" button (depending on device) to
unlock your device screen.
Press the "Power" button to turn the device off.
Press the "Power" button to turn your device
Touch Menu, then touch Settings.
Touch Privacy or Storage, depending on your device.
Touch "Factory Data Reset." A warning message
appears. Touch "Reset" to confirm your choice and reset your device.