MIssed call, no message on a Google Voice number I have never given out. No big deal to me but others should be warned. Never call back any unknown number these days. The world is full of scammers. You might want to play with them but that's a bad idea. Just ignore them. Letting them know that there is an actual person associated with your number can cause them to multiply their calls to you.
They called my cell phone. Don't know anyone in CA, so didn't answer. They then left a recorded message (they are getting creative now...) about some bogus car warranty that was about to expire... same old.....