How does Apple's mobile phone check which card has received the text message?

Step 1: First, we click the message to enter the SMS interface, as shown in the figure below.

Step 2: In the short message interface list, you can see that all the short messages are the same, and I don't know which card received them, as shown below.

Step 3: Open the message that you want to know which card you received, enter the detailed information, and click the arrow after the number, as shown in the figure below.

Step 4: Pop up the selection menu and click Info, as shown below.

Step 5, enter the information interface, and you can see the person who is using it. Explain that the label of this card is an individual, as shown in the figure below.

Step 6: Drop down the status bar at the top to see which card the personal tag belongs to, as shown in the figure below.