Why can't Unicom's card send short messages? ! ! !

Can you answer the phone? If the phone can't be answered, it may be that the card has just been opened and the background is not activated. If the phone can be answered, but the short message can't be sent out, you can go to Unicom business hall or call 100 10, and ask them to check for you, whether your short message function is not turned on or the short message function is set incorrectly when you open the number.

The last possibility is the quality of the card itself. This kind of situation is rare, but I suggest you check it in Unicom's business hall. If they forget to open the SMS function, they can apply for appropriate compensation.