Called me and when I answered, they hung up!

I don't answer unknown number calls, and there was no voicemail. today's was the first call and I'm not sure what the purpose of the call was, but hopefully they'll get tired of calling me

phoned my unlisted line twice at 6:31 AM Pacific Time (Canada) a few days back. Answered it and got dead air. It has been said that this is a Bell South customer but have yet to confirm. Reverse lookup show that call (allegedly?) comes from Miami, Florida, United States. Have also heard others say this is a fax machine.

No one says anything just hangs up

The caller kept silence every time when you answered the call.

This caller is constantly calling and when I answer, they hang up. If I call back, noone answers. Sometime they let the phone ring once and then hang up.