recieved another call from CTEL that is what was on the caller id asking for claiming to be with AT&T asking for person in charge of account

THIS GUY ALWAYS CALLS, WHEN YOU TRY TO CALL HIM BACK HIS VOICE MAIL IS FULL,

IT MUST BE A SCAM FOR ATT OR YOU WOULD THINK HE WOULD HAVE A LEGIT NUMBER WITH WORKING VOICEMAIL

got a call at work 8:43 a.m. from a CTEL that is what was on the caller id just asked to speak to me then hung up tried to call back no answer call was on jan.22 2009