How to block no caller Id phone calls on iPhone 6s?

I have a stalker who calls my phone everyday 100 times and won't stop He calls from different numbers and when I block them keeps calling from no caller Id. I'm seriously getting really annoyed because I'll be doing something on my phone and his phone call pops up every sec is there a way to stop this?

Get a whistle, as loud as possible. Each time they call, blow the whistle as loudly as possible, into their ear. They will stop calling. Will be too deaf to do so.

The fix is coming, the next release of iOS will have a feature that you can turn on where if the number is not in your contact list, then it won't ring and eventually just rolls to voice mail for the caller.

Report it to the Police, before it escalates to a physical attack…

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