OPPO Find X3 Pro
Android 11.0
1 Find "Notifications"
Press the message icon.
Press the menu icon.
Press Settings.
Press General.
Press Notifications.
2 Turn on message notifications
Press the indicator next to "Allow notifications" to turn on the function.
3 Return to the home screen
Press the Home key to return to the home screen.
4 Select message tone
Slide two fingers downwards starting from the top of the screen.
Press the settings icon.
Press Sound & vibration.
Press Notification sound.
Press the required message tones to hear them.
Once you've found a message tone you like, press the Return key.
5 Return to the home screen
Press the Home key to return to the home screen.