Unmasking no caller id calls- iPhone

I have a friend at my work place that is being harassed with countless phone calls. We're aware its by someone from work as he has been called in by said person for a "meeting" at work that obviously didn't exist.

I've heard of websites that allow you to unmask the numbers so instead of it saying "no caller id" the number will come up and we can report this to the manager/ police. However, they're all subscriptions and would prefer something thats free.

Would the phone provider be able to give my friend the number thats ringing him or is there another way to find out who this person is?

I guess another option might be to block anonymous calls on the iPhone but would prefer to know the number.

If you are receiving harassing phone calls, then call your phone company. Even if it is a private number, they can trace the call in most cases and file a police report for you. There are no websites that can do this, you can only do it with the help of the phone company and police.

I don't believe what you seek is possible, more urban myth than fact. You will most likely never discover the number so move on.

The simplest solution is to just block "all" anonymous calls.

You can unmask callers. Use this app. It's easy. Works with most cells. I believe it is very lost cost and you only pay for the options you select. http://www.seeblockednumber.com.

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