It’s frustrating when someone calls your cell phone repeatedly and says rude things or hangs up. Plus on most calling plans, it actually costs you money for someone to be doing this to you.
The positive side is that you can stop the person that’s doing it and all you need is their phone number. If you can get their phone number (and if they are using the “block” function on their phone to hide their number – in many cases you can still get it from your cell phone carrier).
Once you have that number, you can do a reverse cell phone search and find out quite a lot of information about who has been calling. You will have their name, their address, additional phone numbers if given and even work phone numbers where available.
Once you have that information, you can use the information to confront the person directly and let them know in no uncertain terms that the time of making the calls to you is over. And it all starts with a little reverse cell phone look up.