They called my California mobile phone at 9:30 am and left a message of a couple seconds of silence. Even if I had been awake and had my phone nearby, I absolutely never answer unfamiliar numbers. Often I don't answer anyone if I'm busy. And I always block all unfamiliar calls and report them to the FCC.
Received 3 calls back to back like it was an emergency but did not leave a message..Called the number 3 times and it went straight to busy.. I guess they are busy harrassing other people. They are now on my CALL REJECT LIST. #NOTWORRIEDATALL.