There is no sound prompt after the mobile phone receives the verification code. How to solve it?

There is no sound processing method when Apple mobile phone receives App notification: First, it is single.

App has no sound: If only a single app has no sound when receiving the notification, it is recommended to check whether the alert tone is set in the notification of the app. Go to Settings-Notify and find an application that informs you that there is no sound. Take information as an example, click Information-Sound to see if the prompt tone is set to None. Second, all

There is no sound in the app: 1. Check whether the equipment is set in "Do Not Disturb Mode": Enter "Setup"-"Do Not Disturb Mode" and check whether the "Manual" and "Set Time" switches are turned on; 2. Check whether the switch on the left side of the equipment fuselage is set to the "silent" position; 3. Check whether the sound of the device is set to mute.