What the scammer really means is:

Press 1 to add your number to the "it is a live one" list we sell to other scammers.
Press 2 to yell at somebody who may not understand you.
Press 3 to verify you are a human, and answered your phone.
Press 4 if you enjoy getting unwanted phone calls.  We aim to please.
Press 5 if you have a dial-type phone instead of a pushbutton phone.
Press 6 to learn how to send us money by green dot or other untraceable means.
Press 7 if you want us to call you at 7 AM ... or, some other, inconvenient time.
Press 8 if you like the sound of that tone
Press 9 if you are still on the line.
Press 0 to hear this message again

Unwanted call on Cell phone

Strange, caller ID MATH MATTERS IN.No message left.Another caller added to block list.

Unwanted call.  Did not recognize the number. As it has become my practice in such cases, I immediately type the number into my reliable search web site.  Thank you to those who preceded me for posting your info for it is very helpful.

Origin says NY, USA.
Called on my cellphone at 9:43 am when I am at work. I turned off the volume and eventually it called me again.  It is quite annoying because if it is that important 9which I doubt), leaving a message is appropriate, not calling the number again and again.