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Why is there no prompt tone on WeChat video chat mobile phone?

If you are using a vivo mobile phone, and the WeChat receiving video voice phone doesn't ring, you can check the following operation methods:

1, wechat-me-settings-new message reminder-turn on the notification switch;

2. Settings-Status Bar and Notifications-Manage Notifications-WeChat to see if notifications are turned on;

3. Wechat-Me-Settings-New Message Reminder-Turn on "Receive Voice and Video Call Invitation Notice";

4. Confirm whether WeChat is running in the background.