Why doesn’t the screen turn on when I receive new messages?
To protect your privacy and avoid the screen turning on too often and influencing the system standby time, the current system default is set as follows: When the screen is off and new messages are received, an alert will appear and the status indicator will flash according to your ringtone and vibration settings, but the screen will not turn on.
Use the following steps to set the screen to turn on:
Go to settings > Screen lock & passwords > Screen lock style , and then set your phone to Magazine unlock . In Notification & status bar , turn on the Notifications turn on screen switch, so that your screen will automatically turn on when you receive notifications.