Why didn't Huawei mate9 receive the message after locking the screen?

It may be that after the screen is locked, the mobile phone is not connected to the internet, the application is not set or cleaned, and there is no permission to open the screen lock notification. The setting method is as follows:

Keep the phone connected when the screen is locked: In WLAN environment, select Always in Settings >: WLAN & gt Configuration > Keep WLAN connection in hibernation; Open the mobile phone to move data in a non-WLAN environment.

Permission to open application push in notification center: in Settings >; Notification and status bar > select "apply" in notification management to open the corresponding permissions (banner, screen lock and status bar).

Set the application as a protected background application: in Mobile Manager; (X %/ left/battery) > lock the screen to clean the application and select the application as unclean.

If there are third-party mobile phone housekeeper software such as 360 and Tencent mobile phone housekeeper in the mobile phone, it may clean up the background application of the mobile phone, and it is recommended to uninstall it.