My Unicom ice cream package card can use traffic to make calls, but why can't I send and receive text messages?

If the mobile phone card cannot send and receive short messages, it is recommended to try the following operations: 1, shut down and restart the test; 2. Check whether the SMS function is enabled on the mobile phone card. If it is not enabled, you can't send and receive text messages. It is recommended to contact customer service for related service functions. 3, change the card and change the phone to test it; 4. It is recommended to check whether firewall type software interception is installed; 5. If the short message sent only for a specific mobile phone number is abnormal, it is recommended to check whether the short message service of the other party is normal; 6. Check whether the number of the SMS center on the mobile phone is correct. If it is not correct, it will affect the sending of short messages. If it is not the above reasons, it is recommended to contact the local Unicom customer service for consultation and handling.