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My vivoZ 1 notification bar does not display QQ, SMS or WeChat messages. How to solve it?

The notification bar of vivoZ 1 does not display QQ, SMS and WeChat messages. The specific steps to solve this problem are as follows:

The materials we need to prepare are: mobile phone, vivoZ 1.

1. First, we turn on the phone and click "Applications and Notifications" in the opened settings.

2. Then we click "Notification Management" in the pop-up window.

3. Then we click to open "Batch Management" in the pop-up window, add QQ and WeChat, and then click to open the switch in the upper right corner.