If your Android phone is turning on and off on its own, you may need to reboot your device. The following steps will reboot the device:
- Press and hold the power button on your phone to turn it off.
- Once off, hold down the power and the volume-down button until a recovery screen appears.
- Use the volume-down button to scroll to the “reboot system now” option.
- Once “reboot system now” is highlighted, press the power button one last time.
Your phone will reboot, and power back on. This should fix any problems you’re having with your phone turning off and back on by itself. If this does not solve the issue, please see your manufacturer’s warranty.