I got a call from a that my caller id displayed as local cell phone

Paul | 13 Sep 2018

Cold Call Supplier Scam
I got a call from a that my caller id displayed as local cell phone. Thinking it could be a friends new cell number or a contact which I have not saved. I answered the call and was shocked that a voice recording in Chinese blantantly said they are calling from a police hq. The mobile number is 91757929. immediately hung up the call as I was informed previously by relatives of such calls. What is our authorities or telecos doing about this? In a short spam of 2 months I have received 3-4 such ca