Why can't Apple's mobile phone receive a short message from the designated person?

If you don't want to receive short messages from the designated person, you can blacklist it. The specific operation steps are as follows:

1. Click "Address Book".

2. Find the contact you want to delete, such as "high-speed rail housekeeper grabbing ticket reminder", and click this contact.

3. Then drop down the bottom and click "Block this calling number".

4. As shown in the figure, click "Block Contact" and you will not receive the information of this contact.

5. If you want to receive this person's short message again in the future, you can click "Unlock this calling number".