What's wrong with oppo SMS without prompt tone?

1. Confirm whether unimportant notification is set: "Set >；; Notification and status bar > (notification management) > information > information notification (system mute channel) > set as unimportant notification ",just turn off this function.

2. check whether the phone is turned on: "settings > Breeno) > driving mode (Breeno driving) > undisturbed driving", just turn off this function.

3. Check whether sleep mode or concentration mode (meditation mode) is turned on, and turn off this function.