Voicemail paused for a few seconds and then an automated voice said "goodbye". It was kind of creepy. Caller ID said Middleton,NY

Same scenario as Holly.  Why they would add "goodbye" as a message confounds me!

This number calls a few times a month, usually I do not answer as they never say anything after I say hello. Today I answered and after ten seconds of nothing a woman came on and said "You're gonna die" then immediately hung up. The voice sounded happy and recorded.

Calls everyday and asks for Charlene....when I don't answer they hang up

This number calls my new TracFone almost every day. It gets weirder. I never gave anyone this number. Even I don't know it. I bought the phone for Android app development testing. So far, I have not answered the caller.