AT and T Columbus Ohio Contact Customer Service Numbers Home» AT» AT and T Columbus Ohio Call at +1 678 296 00003100 Medlock Bridge Rd Ste 140, Norcross, GA, United States, 30071-1429Directions: Follow the directions to locate AT and T Columbus Ohio ContactLocations Near You: Find nearby locations of AT and T Columbus Ohio ContactCustomer convenience Number: 844.723.0252Wireless Support: 800.901.9878Internet consumer convenience : 800.288.2020IntroductionAT&T Mobility, formally Cingular Wireless LLC, is a wireless telecommunication corporation of US. this was inaugurated in 2000. head corporation of AT&T Mobility is AT&T. head department of corporation is set-up in Lenox Park, Georgia, America of America.