SIM card not excess
my iPhone is not connected with SIM card
Question marked as
Take it in to the carrier who gave you the card. They may need to perform an activation on the card.
Also make sure the SIM card is not flipped upside down, and you are using the right SIM card for your phone model.
Often they distribute two sizes as one when you get a SIM card by mail, and the smaller one pulls out for models that can accept that card.
I'm asking this thread get redirected to the iPhone forum as it has nothing to do with Apple's Mac compatibles.