Have iphone display what number your caller is calling (dual sim)

Hello Geoffrey,

The iPhone 11 is able to and displays the active line that the call comes in on. For example, if you label them as Primary and Secondary., then the Primary name will display a small p and the secondary name will display a small s to the left of the number.

Axel F.

Yes that indicator (P or S) should happen whether the caller is in your contacts or not. By the way that P or S is an example. If you assigned different or custom labels to each line then the first letter of that label(s) will appear.

Is the indicator there under the caller name in the Recent Calls list at all?

There is no particular setting to activate this feature or to deactivate it. It is permanently set to ON by default.

Axel F.