AT&T is an American telecommunications company based in Dallas, Texas. It is the second largest mobile phone supplier and the largest US fixed line supplier. It also provides a broadband subscription to television services. It’s also one of the dividend aristocrats with very interesting yields. In 2016 the company reported about 130 millions customers. The company offers services not only in the United States but also in many Asian countries. Besides telecom industry AT&T also owns WarnerMedia which is an important media company.