How do I enable Silence Unknown Callers on my iPhone? (iOS 13)

As of a recent Apple update, your iPhone now has an option to silence all unknown numbers. RoboKiller uses this function to screen all of your calls and determine which are spam, and which are worth your time.

To enable this feature:

  1. Go to your iPhone Settings
  2. Find and tap Phone
  3. Enable the Silence Unknown Callers option. 


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