Can you block an unknown caller on iPhone?

This guy keeps calling me on an unknown number harassing me and leaving me hateful voicemails. I can't block the number because he's purposely calling from an unknown number. Is there any other way I can get it so I don't receive calls from him?

Try contacting your cellphone provider. The phone can't block a number that it doesn't recognize, but some providers have the equipment to do so. You'll probably need to let them know the exact time the calls came in so they can track them in the system. And since the calls are harassing, let them know you need the information in order to file a police report, and follow up on that.

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