There are short messages between two Xiaomi mobile phones on the Internet, and the chat has become a system short message system, thank you.

This may be a temporary network interruption, or you can try it, turn on the data traffic switch, reset the default value in the settings-access point APN, then restart the phone and try again.

A more detailed description of the problem will help netizens understand your troubles and help you solve the problem more accurately. Thank you for supporting Xiaomi mobile phone!