Cingular Wireless is headquartered in Atlanta, Georgia. The present day name of the company is AT&T Mobility LLC and it is a wireless subsidiary of AT&T, Inc. The company specializes in wireless services. The revenue of the company totals to $37,5 billion. It employs 70,300 people. The tagline of the former Cingular Wireless company is: "Your World. Delivered." AT&T is the leader in the industry of moble phone services and AT&T Mobility is the fourth largest mobile phone operator. The company offers its customers a wide range of wireless services, such as individual plan or "FamilyTalk" plan. AT&T is the only GSM carrier that iPhone can work with until 2009. Please try to contact Cingular Wireless Customer Service directly prior to posting any complaints on this site.