The SMS or notification of Samsung s6 keeps ringing as long as you don't read it.

More information (upper right corner), settings, notifications, slider open, beep.

Customize the SMS ringtone, save the song to the Notifications folder in the root directory (if not, please create a new one) and then set it according to the above path.

1. Click Settings.

2. Click actions and gestures

3. Open your palm and slide to capture.

4. Click the button displayed in green.

5. Slide the palm screenshot.