How is it that the bracelet is connected to the mobile phone, and the caller ID WeChat and SMS can't work?

Subjects are advised to observe the following questions:

1) The mobile phone is dormant, and the background process cannot be shut down;

2) Computers and mobile phones cannot be used online at the same time;

3) The bracelet is always connected to the mobile phone, and Bluetooth needs to be turned on all the time;

If there are no problems above, you can try to observe whether to open the permissions of the APP corresponding to the bracelet and whether to set the APP as a white list of security software. For example, mi band's Xiaomi campaign needs an APP reminder. You need to add a white list in the security center and open the application notification permission.