Why does the cool dog ringtone ring after the call background is set to WeChat?

1. It may be that the mobile phone has turned on the background playback function of some apps, resulting in the video still playing in the background after the screen of the mobile phone is closed. Click to enter the app for playing video, and find the setting options below the video. After opening, find the background playing option in the interface, and change the opening option of background playing to off. 2. If the phone does not completely close the app, you can still hear the video sound after closing the phone screen. Slide your finger upward from the bottom of the mobile phone screen, find the app that is still playing video in the pop-up background application management interface, and then slide the app to close completely.