TOP 5 CELL PHONE PROVIDERS (USA)
AT T, Inc is the largest provider of landline telephony in the USA, and also provides broadband and subscription television services. AT T is also the second largest provider of mobile telephony service in the USA with over 92 million wireless customers; just behind Verizon Wireless.
By 2010 AT T was the seventh largest company in the USA by total revenue, as well as the third largest non-oil company in the USA (behind Walmart and Bank of America). It is the third largest company in Texas by total revenue (after ExxonMobil and ConocoPhillips) and the largest non-oil company in Texas. It is also the largest company to have its headquarters in Dallas.
Southwestern Bell Corp was founded in 1983 as a Regional Bell Operating Company following the break-up of the original AT T as a result of antitrust litigation. The company changed its name in 1995 to SBC Communications, Inc and again in 2005 to AT T, Inc after acquiring its former parent company, AT T Corp. The newly merged company adopted the iconic AT T logo and T (for telephone ) stock-trading symbol.
The current AT T network reconstitutes much of the former Bell System and includes ten of the original Bell Operating Companies, along with one in which AT T held part ownership (Southern New England Telephone) and AT T s original long-distance division.
Sprint Nextel Corp is a telecommunications company based in Overland Park, Kansas. The company owns and operates Sprint, the third largest wireless telecommunications network in the USA after Verizon Wireless and AT T, with over 48 million customers.
Sprint is also a global internet carrier. In the USA the company is the third largest long distance provider and also owns a majority share in Clearwire, which operates the largest wireless broadband network.
The company was renamed in 2005 upon the purchase of Nextel Communications by Sprint Corp. The company continues to operate using two distinct wireless network technologies, CDMA and iDEN (for Nextel and some Boost Mobile sub scribers). In 2009, Sprint endorsed an agreement to outsource the management of its wireless networks to Ericsson.
Sprint Nextel launched its first WiMAX wireless device on 21 December 2008 (the Franklin Wireless u300 broadband card), and the first WiMAX phone available in the USA (the HTC Evo 4G) on 4 June 2010, applying WiMAX technology from Clearwire Corp.