Didn't recognize the number so I did not answer it. No message left. However, this is a new phone and a new number of which only 3 people even have it now. I get unrecognized calls now at least once a week between my two phones. Whenever I have answered these unknown calls no one is there. It's almost as if it's some automated service using random phone numbers to test with. Perhaps even spoofing to hide the real number.