AT&T is an American multinational conglomerate holding company, headquartered at Whitacre Tower in downtown Dallas, Texas.AT&T is the world’s largest telecommunications company. AT&T is the second largest provider of mobile telephone services and the largest provider of fixed telephone services in the United States, and also provides broadband subscription television services through DirecTV; combined with AT&T’s legacy U-verse service, this also makes AT&T the largest pay television operator.
The company operates through four segments: Business Solutions, Entertainment Group, Consumer Mobility, and International. The Business Solutions segment offers wireless services, strategic services, legacy voice, data services, wireless equipment, and other services to multinational companies, governmental and wholesale customers, and individual subscribers. The Entertainment Group segment provides video entertainment and audio programming channels to approximately 25 million subscribers; broadband and Internet services to 13.5 million residential subscribers; local and long-distance voice services to residential customers, as well as DSL Internet access; and voice services provided over IP-based technology. The Consumer Mobility segment offers postpaid and prepaid wireless voice and data communications services to consumers, and wireless wholesale and resale subscribers; consulting, advertising, and application and co-location services; and sells a variety of handsets, wirelessly enabled computers, and personal computer wireless data cards through company-owned stores, agents, or third-party retail stores, as well as accessories, such as carrying cases, hands-free devices, and other items. The International segment offers digital television services, including local and international digital video entertainment and audio programming under the DIRECTV and SKY brands throughout Latin America. This segment offers postpaid and prepaid wireless services in Mexico to approximately 15 million subscribers under the AT&T and Unefon brands; and sells a range of handsets.