How to block unknown caller on iPhone 6?

I keep on get a phone call from a person that says unknown. I go to the number click on the i symbol and there's nothing there. No number, no text message option and no block contact section. Don't know why the person calls me again and again.

Its not a person is a computer programmed to call constantly till you answer, if you answer then they know someone is at the number, then they sell your number to solicitors. So just keep ignoring it, someday it will go away. You can't Its unknown so you can't, but why does it matter because I never answer a call from an unknown caller anyways. Download a good phone number blocking app, then block all "unknown" calls. I have one on my Android, so there must be many to chose from for the iPhone. Try adding your number to the National Do Not Call Registry. Or change your cellphone #. But you have to call your carrier.

You can't

Its unknown so you can't, but why does it matter because I never answer a call from an unknown caller anyways.

Download a good phone number blocking app, then block all "unknown" calls. I have one on my Android, so there must be many to chose from for the iPhone.

Try adding your number to the National Do Not Call Registry. Or change your cellphone #. But you have to call your carrier.

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