Why is there no SMS reminder for Unicom card to pay the phone bill?

According to the situation you described, the possible reasons for not receiving the text message and the handling method: 1. Please check whether the mailbox is full first. If it is full, please delete some information. 2. If it is still not received after deletion, you can change the machine or card to see if it is a hardware factor; 3. After eliminating the above reasons, you can try to test whether it can be received in other places to see if it is the reason for the weak local signal. If the above situation has not been solved, it is suggested that you can contact the local manual customer service for handling.