I have a Samsung Galaxy S5 originally from AT&T, running Android 5.1.1. At my last visit to AT&T last year, the technician somehow input my phone number under "My Info" in the contacts DB. The Phone number is greyed out (can't be edited or deleted), and the "My Info" contact can't be deleted either. I'd like to delete "My Info" from the contacts DB along with the Phone number. How can I do that?