Medicare scam robocall. Receive one of these almost every day. Most of the recorded voices are professional announcers. If it weren't for the delay in the start of the recorded greeting, I could almost believe that I was talking to a human. Sometimes I talk to the robot to see how sophisticated it is. If I respond negatively to the robot's questions, the response is usually appropriate, such as "We're not trying to sell you insurance and are only here to advise you." I block them all but they just use new spoofed numbers the next time.