Block SPAM phone calls
98% of the phone calls I get are SPAM. I never pick up the phone anymore unless the person calling is already on my contact list - otherwise unfamiliar/unknown numbers must leave a voice message - if the caller wishes to communicate with me.
Is it possible to set up my iPhone such that it ONLY rings when the person calling is already on my contact list?
David
MacBook Pro (Retina, 15-inch, Mid 2015), OS X El Capitan (10.11.1)