The AT&T network includes extensive wireless and wired access capabilities, as well as one of the world’s most advanced and powerful IP backbones. AT&T is a leader in IP-based communications services to businesses. They also have one of the nation’s fastest 4G LTE networks and the largest international coverage of any U.S. wireless carrier, offering the most phones that work in the most countries; the largest Wi-Fi network in the United States; and the largest number of high speed Internet access subscribers in the United States.