Xiaomi 4 didn't miss the mobile phone. What happened?

1. It may be caused by a problem with the phone settings. You can enter the dialing interface, press the menu key, select the incoming call setting interface, and then set the number of missed call reminders to 1 time or more.

2. This may be caused by a problem with the dial-up application. You can go to Settings-Applications-All Applications-Dial-Clear the data, restart the phone after clearing it, and it will return to normal.

3. It may also be caused by system problems. You can restart the phone for testing, and if necessary, you can restore the system to the factory setting state or upgrade to the latest version.