phones 4 times a day. So irritating. Muffled mans voice says hello and hangs up. When i try to call back, the line is busy. Somebody stop this guy.

This exact same thing happened to me, on Jan 12 2013 a man who sounded like he was muffled by something said hello, then hung up.

This number called twice today, once at 10 am and again at 10:53 pm.  When answered a faint male voice says hello than hangs up.

This number has called me three days in a row. Several times a day including last night at almost 9:45. Never leaves a message.

Has called me three business days in a row and never left a message. Always calls when I am unavailable.