Unknown number. Didn't answer. We get many unsolicited callers that we watch on caller I.D. If unknown, we don't pick up. If they are legit, they can leave a message. If it's a friend and they don't leave a message, it must not have been important.
I get a call from this number every single day. They never leave a message. I tried to call back and they don't answer. It is very frustrating because I leave my phone on silent at work. I finally blocked the number today.