Why are some mobile phone numbers displayed smoothly, while others are not?

The problem of system network is also related to your location.

The version and function model of the mobile phone are different, so the function is different from the normal one.

1. Confirm that the other party's mobile phone is turned on and the network is in good condition.

2. Please go to Settings > Applications > Application Startup Management >; Call continuously. If there is a "continuous call" option, make sure that the continuous call between yourself and the other party's mobile phone is set to "automatic management". If not, the "Continuous Call" option turns on "Automatic Management" by default.

3. If you still can't solve the problem, please go to Settings > Application > Application Management > Display System Progress, search for "Unicom Call", enter the storage, clear the cache and delete the data, and then re-enter Unicom Call.