Block "no caller ID" is needed feature

I also get these calls. I recently switched from an Android to iPhone. I never got those calls on the Android, but the very day that I set up my iPhone I started getting multiple "no caller id" calls, as well as calls from "91-06" and from more standard phone numbers with distant area codes. The iPhone cal block the ones that have actual phone numbers, but does not offer that option for "no caller id" calls. I called Verizon and they claim that they "can't" do it because the technology doesn't exist. This is a different line than it seems AT&T is giving.

I have found a solution though. After getting increasingly annoyed at the phone continually ringing and having to silence it, I started answering the calls and immediately hanging up. For each number that I did that with the calls stopped immediately. They began again a few weeks later and the same approach worked again.

I checked Verizon to see if I was being billed for anything and I'm not.

Could it be true that Apple just doesn't give a hoot about its users? We know that:This is a reported problem almost since the beginning of the iPhone; carriers will not address it; and it is doable. So where are you, Apple? If you are really here to support your users, DO IT! LISTEN TO US! If you will go go court against the government to protect users' privacy, why won't you give us this trivial fix to boost our privacy? If you have a year when the best you can do for improvements is to fiddle with the size of the phones again, what about a real splash - give us this fix! NOW!

Please help me how did u do this with this program

I want to block private numbers calls on my iphone 6s PLEASE HELP ME!