Samsung GALAXY S8 User Manual page 198

Media Volume Limiter
Limit the maximum output of the device's volume. You
can also set a PIN to prevent unauthorized users from
changing this setting.
1. From home, swipe up to access Apps.
2. Tap Settings >
Volume.
3. Tap More options > Media volume limiter.
Tap On/Off to enable this feature.
•
-
When enabled, drag the Custom volume
limit slider to set the maximum output
volume.
Tap Set volume limit PIN to prevent changes to
•
the volume setting.
Settings
Sounds and vibration >
Ringtone
Choose from preset ringtones or add your own.
1. From home, swipe up to access Apps.
2. Tap Settings >
Ringtone.
3. Tap Ringtone to select a default ringtone.
Add a Ringtone
When you select a ringtone, you can add a custom
ringtone.
1. From home, swipe up to access Apps.
2. Tap Settings >
3. Tap Ringtone, scroll to the bottom of the list, and
then tap Add from device storage.
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Sounds and vibration >
Sounds and vibration.