If after restarting the device you still find your device freezes sometimes or is sometimes unresponsive, follow the steps in this guide to correct this symptom.
If your phone does not restart you should try the steps in “Check your device in safe mode” and “Perform factory reset”
If the issue persists, try clearing the cache partition on your device.
- Turn your device off, if it isn't off already.
- Connect your device to a computer using a USB.
Hold the volume up and power button at the same time for 10 seconds. Keep holding the buttons until you see a Samsung Logo.
Using the volume down button, scroll down to wipe cache partition.
Press the power button to select.
- If you do not see an option for 'wipe cache partition', you will be unable to do this on your device.