Basic Caller ID is as the name implies. You will see the telephone number of the caller. If the number is in your contacts, your phone will show the contact’s name as you inputed into your phone. When receiving a domestic number, you would see the prepending +1 followed by the domestic number. When you receive an international call, then the country code which is between 2-3 digits (not counting NANP). Again, if the number is properly formatted into your phone, the contact’s name will show.