
	AT&amp;T Inc.&nbsp;is an American&nbsp;multinational&nbsp;telecommunications&nbsp;corporation headquartered in&nbsp;Whitacre Tower,&nbsp;downtown&nbsp;Dallas,&nbsp;Texas&nbsp;AT&amp;T is the largest provider both of&nbsp;mobile telephony&nbsp;and of&nbsp;fixed telephony&nbsp;in the United States, and also provides&nbsp;broadband&nbsp;subscription television&nbsp;services. AT&amp;T is the third-largest company in Texas (the largest non-oil company, behind only&nbsp;ExxonMobil&nbsp;and&nbsp;ConocoPhillips, and also the largest Dallas company). As of May 2013, AT&amp;T is the 21st largest company in the world by market value, and the 13th largest non-oil company. As of 2013, it is also the 21st&nbsp;largest mobile telecom operator&nbsp;in the world, with over 107.9 million mobile customers.
