When sending a text msg using either "People" or "Messages", all of the phone numbers for a contact are available in the selection menus. Is there an option to show only mobile numbers? In "People", for any contact, you can add a "primary" attribute to one phone number that affects the behavior for making phone calls, and you can also add a "primary" attribute to one email address, but I can't find any way to set such an attribute for text msg?