This is applicable for all the realme devices, the "Quiet Time" feature may be "Do not Distrub" in your device. This is actually the same meaning.
Every day, users are suffering numerous harassment messages and phone calls. Except using the whitelist and blacklist functions, users can also use the mobile phone Quiet Time feature.
When DND is enabled, the user's phone will not receive notifications except for allowed incoming calls, messages, and notifications, in a silent (no vibration) mode. And a “moon” icon will appear in the status bar.
Note: The alarm clock and countdown timer will not be muted.
Swipe down from the top of any interface to the Control Center, then click to enable Quiet Time. Or Settings --> Quiet Time.
2.1 Enable manually.
Manually click to switch on.
2.2 Enable Automatically.
The user can set the time to enable automatically, based on what you need, you can set the days , start and end time.
2.3 Allowed Content.
① Allow Notifications
The user will receive the notifications from the mobile phone system when the Quiet Time is turned on but without a tone.
Note: After the Quiet Time is enabled, the third-party app message needs to enable the ringtone and vibration in the notification management of the application information to have the prompt tone and vibration.
② Allow Messages From
Disallow All：Still can receive the messages but will not receive any ring tones and vibrations.
From Anyone：You can receive the messages from anyone with ring tones and vibrations.
Only From Contacts: Only receive the messages from your contacts with ring tones and vibrations.
Starred Contacts Only: Only receive the messages from your Favorites with ring tones and vibrations.
③ Allow Calls From
Disallow All：Still can receive the incoming calls but will not receive any ring tones and vibrations.
From Anyone：You can receive the incoming calls from anyone with ring tones and vibrations.
Only From Contacts: Only receive the incoming calls from your contacts with ring tones and vibrations.
Starred Contacts Only: Only receive the incoming calls from your Favorites with ring tones and vibrations.
Ring for Repeated Calls.
When this feature is enabled, a second call from the same number within 3 minutes will not be silenced.
Note: This feature does not limited by Allowed Content and also not affect it.
*This information will aid you to navigate "Quiet Time"/ "Do not Distrub" feature in your realme device.