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How can I block calls from the "Unknown" caller? I have iOS 7 on an iPhone 4S. Does any other version of the iPhone offer this ability?

I've checked the question Call blocking for iPhone?, but it doesn't seem to work for "Unknown" callers.

I found the following question: Cannot answer unknown calls on my new iPhone 4S.

I want to do the opposite. I want to stop unknown callers from coming up on the phone, and I would rather not know that they are calling.

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up vote 3 down vote accepted

Sorry, but true call blocking can be only done by a carrier. However, if you wish to allow calls only from your contact list, and exclude everyone else, you can use Do Not Disturb feature on your iPhone 4s.

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For saved contacts, its easy task to block any contacts from Settings > phone > blocked option.

But for Unknown number call block follow the below steps,

Phone app > Recent > (i) symbol > Recent option (Blue watch icon) > Block this caller.

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Phone app > Recent > (i) symbol > Recent option (Blue watch icon) > Block this caller. That suggestion does not work. When you Hit the Clock symbol the second time nothing happens. I believe your service provider needs to have this function; AT&T does not, unfortunately. – user100705 Nov 14 '14 at 16:52

I phone 4s should have a function on phone to do this

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Would you care to elaborate? I'm certain the feature does not exist... but if you could tell us where to find it... ? – Charlie74 Jan 10 at 2:38
Are you saying that the said feature already exists? Or that you wish it existed? – Alex Jan 10 at 10:28

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