Nov 03, 2016

How do I send "No caller ID" and "Unknown" callers directly to voice mail on my iPhone 6+?

11/06/2016
I don't believe there's an easy way to block unknown numbers on iOS. You can set your phone to Do nut disturb, and let only the numbers in your contact list to go through. Take a look at other workarounds the article from MacWorld covered http://www.macworld.co.uk/how-to/iphone/how-block-number-any-iphone-ios-7-ios-6-ios-9-ios-10-3457215/
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