Just the number shows up, our CID shows no name and they never leave a message.
Too many calls coming in these days; so, I apply this hard and fast rule as way to trimming repetitious "useless" calls and callers. If no name shows up and you can't leave a message, your call is of no importance to me and you will be blocked. I love blocking people, its fun to see how many times some people will call even though my phone will automatically hang up on blocked callers each time (And my phone doesn't even ring when these callers dial my number ...I love it!