Why can't Unicom send short messages to mobile?

First, check whether the status of the mobile phone card is normal and whether there is any arrears. If not, it is recommended to test that all mobile phone number short messages cannot be sent. You can restart the mobile phone and put the mobile phone card into other normal mobile phones for testing.

In addition, you can also try to restore by resetting the number of the SMS center. If all the above methods have been tried, there is still no recovery. It is suggested to contact the operator in time for feedback processing.