1. First, enter the setting interface of the mobile phone, find the option of "Notification and Status Bar", as shown in the figure below, and click Open.
2. Then find the "Notification Management" option in the interface to open.
3. Find the application that needs to be modified.
4. Enter a new interface and open the marked part, as shown in the figure below.
5. Then go back to the settings and find the "Sound and Vibration" option.
6. Finally, set the phone volume.