Everyone knows the calls from dialing machines with various ruses such as a package deliver, legal action against a person. Usually the call wants a key press to speak to an “agent”. One recent call started in English before switching to Chinese.
I found they run away when I say, “anything you say can and will be used against you in a court of law”.
Test message spam is also reduced as efforts to block IP phone abuses but blocking improper telephone numbers etc. The iPhone can not only show a calling number, it even identifies the locale of the caller.
Law enforcement has been working with mobile and landline operators to secure their systems. It is known that police are attempting to arrest the seretive calling center operators which are known to exist in Jamaica and India among other nations.
It hard to say how long the efforts will take to eliminate the problem. The fax line, for example, has been quiet for several days now.