Who called from 2105039424

Received call from this number...no sound or answer after my "hello".

Left voicemail, checked it and all I heard was a beep and the caller hung up.

Called, no voice, let it go to voice mail for 4 seconds then hung up

Called the number back - recording of a Medicare survey.  Said if I took the survey I would be "eligible" for exciting gifts.  Did the first couple of questions then hung up.  Total scam.