Phone rang twice and the caller hung up when I answered.

Same here.

They have called 3 times first time we answered they assked for my husband by name & said they were doing a Medicare research, he was busy & told them to call at another time.  They have called two more times late i the evening around 9 pm our time would be 12am Fla time.  They are annoying

They called me at 9:30 and hung up, several times.  very annoying

called 8:30 EDT. Said the were calling for Blue Cross Blue Shield about service.