Hello, there are design bugs in third-party VoIP applications such as WeChat (it doesn't meet the requirements of Android, and it will return to normal after the call). After the call, the third-party application didn't quit incall mode at that time, which caused the phone to stay in call mode all the time, so that the receiver would play music/video. I suggest you clean up the WeChat program from the background, then you can play the music again and check whether it has been restored. If the sound from the speaker cannot be recovered after cleaning, you need to restart the phone, and the phone will return to normal after restarting.