Starting life as Southwestern Bell Corporation, following the breakup of the AT&T Corporation monopoly in 1983, the company later renamed itself to SBC Communications Inc. In 2005, SBC purchased its former parent, AT&T Corp., taking on both its name and branding.
Within the U.S. wireless segment, AT&T and Verizon continue to fight for top spot, both sitting comfortably above Sprint Corporation and T-Mobile US in terms of revenue. AT&T has a subscriber base of approximately 76.89 million postpaid and 17 million prepaid customers as of 2018, and AT&T's monthly postpaid churn rate remains one of the lowest in the industry, sitting at just 1.12 percent in 2018. In terms of monthly average revenue per user (ARPU), AT&T generates almost 50 U.S. dollars per postpaid user per month.
In 2018, the brand value of AT&T was estimated to be around 107 billion U.S. dollars, making it one of the most valuable telecommunications brands in the world.