When one of the apps is not responding on the Samsung Galaxy S8, you can try to force restart the device so that you can use the device again.

To restart the device do the following:

1. Press and hold on the Power button and the Volume Down key simultaneously for more than 10 seconds, when you see the Samsung logo appears, you can let go of all the buttons.

Once the device startup again, you can investigate which app is causing the problem and you may want to remove it or repair it.

 
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