multiple calls received from this number, on a new AT&T U-verse telephone number which just got activated! I assume it's a robo-dialer... No messages left
Call back gets "You're call is very important to us, please stay on the line and you'll be transferred to the next available agent." You will never be transferred and the call will eventually convert to "I am sorry, that is not a valid extension, please try again," followed by a "busy tone." That's because there is NO agent. It's a robocall and most likely a SCAM. I have had this exact experience with two other numbers and they turned out to be the IRS scam from India. So, block the number. It's a scam.