Why can't Unicom send and receive short messages?

Unicom's number is in arrears or the SMS sending and receiving function is turned off, which will cause Unicom's number to be unable to send and receive SMS. You can check whether the mobile phone status is normal and whether the SMS sending and receiving function is opened normally through Unicom's mobile phone business hall.

If the arrears of the mobile phone are paid off, it can be turned off and restarted to resume normal use. If the short message sending and receiving function is not enabled, it can be used normally after re-enabling the short message sending and receiving function.

The inquiry method of SMS function in mobile phone hall is as follows: China Unicom Mobile Phone Business Hall-Inquiry-I have ordered-service products.