called me on my mobile and when i answered, line sounded like i was on hold for 30 seconds, then disconnected me.

Okay...they called again an hour after my last post.  

After some detective work this mornng, I learned the number one must call to stop the annoying phone calls from the AT&T wireless call center is 1-877-734-0766.  They said it would take 24-72 hours.  The person who helped me was actually helpful and sincere.

After receiving multiple hang up phone calls from them, I called the number.  I too was told it's a call center for AT&T Wireless in Rio Rancho NM.  They claimed they are calling about an AT&T line about our being over on minutes and that they are only an inbound call center.  (Funny, they weren't calling an AT&T line and their "incoming only" number made an outgoing call to my number!)   They said they couldn't put me on a "Do Not Call" list if I wasn't an AT&T Wireless customer. I told them under federal telecommunications law they had to if I asked them to stop calling.   I guess we'll see!

Under federal law a telemarketer must provide the physical address of the office.  The address I was given is 6090 East Venus  Rio Rancho, NM 87114   (Might come in handy if you need to file a complaint.)

Called four times, nobody there...

I answered phone and no one replied to my "hello". I didn't say anything else, thinking it was a robo call.

I *67'ed them and called them back.

It's AT&T wireless.

Called me Oct 7 5:47 PM Eastern.  I didn't answer.

Received a call from this number today stating they were AT&T and that I was over on my minutes and they needed to adjust my plan.  I told them my plan was fine and they said oh, I can see it is.  Very odd.

Called twice today. Asked for James. We don't have an employee by this name

Inbound call to a business from this phone number, asking for an employee that would not normally receive phone calls.

Called and didn't leave a message.