Call came in on cell phone.  No one there on the other end.

Business Cell... Same as others... I have received multiple calls from this number and no one is there when answered.  Have them blocked now.

Nobody on the line and a return call just rings.  Don't pay attention to this number or block it if you can.  All good

AT&T business class, calls several times per day, advised that we are on DO NOT CALL list, asked to be put on their do not call list but they refuse.

Often hangs up on me when I ask them to stop calling

This number calls my mom's restaurant a few times a week, always saying that he's from AT&T and he needs to talk to the person that handles our account. I took the phone call from this number this afternoon (from a person name Julius). He said that he's calling from AT&T. He said that his record indicates that we switched over from the old AT&T (which is true). He says that we are eligible for a reduction at no cost and no change to the service (I asked him multiple times and he says no change or extra charge in service). So I agreed. About 30 minutes after everything is over, he called again. He said something like, "I think I can get you in our phone book. What type of business do you have?" I said, "..ummm...restaurant." He said thank you and hung up.