US celluar vs AT&T.

The United States Cellular Corporation, or short U.S. Cellular is a U.S. mobile phone company. With 6.1 million customers it has in the U.S. mobile market in terms of subscribers, the sixth largest competitor behind rivals Verizon Wireless, AT&T Mobility, Sprint Nextel, T-Mobile USA, MetroPCS (in 2009). Currently operates U.S. Cellular a CDMA2000 mobile network in 126 local markets in 26 U.S. states, the geographic focus primarily in the Northwest, Midwest and is located in the northeastern United States. Through roaming agreements with other network operators are the services offered to customers throughout the U.S. and internationally. Since it was found in 1983, the Company operated an AMPS cellular network. Until 2002, when the transition was initiated on the CDMA technology, customer base rose to (even by acquiring smaller local mobile network operators) 4 million. From 2009 the upgrade of CDMA network with EV-DO standard, which allows faster data transfers. The introduction of an LTE service is planned for late 2011. The company is owned 83% of the company Telephone and Data Systems. This operation in the 90s, when the U.S. mobile market was highly fragmented, under the name "Aerial Communications," a GSM network, which ultimately, however, to was Voicestream (the predecessor company of T-Mobile USA) were sold. In several surveys is U.S. Market Cellular as mobile vendors with the highest customer satisfaction and quality of the connection described in the U.S. tried the product side to highlight the company is also thereby incoming connections are not (as in the U.S. is usual) the customer be billed.

AT&T (the English abbreviation for American Telephone and Telegraph) Corporation is an American telecommunications company. AT&T provides telecommunication services for voice, video, data and Internet services for businesses, individuals and government agencies. During its long history, AT&T was the largest telephone company and the largest cable television operator in the world. At its peak, covered 94% of the U.S., constituting a monopoly. After a long process, AT&T was split into several smaller companies, to stimulate competition. The daughter companies of AT&T in the United States are known as "Baby Bells". The original AT&T was the only long-distance calls.

The company that became AT&T began in 1875, an agreement between the inventor Alexander Graham Bell and two men, Gardiner Hubbard and ThomasSanders, who agreed to fund its work. Bell was trying to invent a telegraphspeaker - a phone. He was successful and was able to register patents in 1876 and 1877. In 1877, the three men formed the Bell Telephone Company to exploit the invention. The first telephone exchange, operating under license from Bell, opened in New Haven, Connecticut in 1878. In three years, call centers exist in major cities throughout the United States, operating under the license of what is now the American Bell Telephone Company. In 1882, American Bell acquired control of Western Electric Company, which became his factory. Gradually, the American Bell became the owner of most of its graduates, and the company became known as the Bell System (Bell).