Don't have caller id unless I go on computer to pull it up, so I don't know the number of any call coming in until after. Same number just called again 10/12/16 6:30pm number shows as unavailable. This time from an obvious call center (background noises ). Woman (sounded young) asked for me by 1st name, and when I responded "Speaking" she paused & then hung up on me. Maybe she couldn't hear the reply over all the "boiler room" noise. Works for me...would work better if they didn't call at all though.
They called and said a very pleasant "Hello", so I said hello back, I could hear people talking in the background, it sounded like a call center or something, but then they hung up. When I called back, it went to a voicemail without ringing.