An Asian voice could be heard on the voice mail. They rang back and I was quick enough to prevent the answering service from taking over. Pretending not to be able to hear this person I kept saying Hello Hello until she hung up. I then rang the number shown in the log and an elderly woman answered who told me she had not rung anybody. I wonder if it is possible to force anyone's phone number to show up on the screen, as I believed the lady when she said she had not rung anyone. Totally different voice - much lower register - and much older than the nuisance caller.