Cingular wireless was found in 2001 as a joint venture of SBC Commnucations(now AT&T Inc), and Bellsouth. Cingular grew out in a conglomeration of 12 regional companies with Bell roots. Cingular Wireless is the largest wireless company in the United States, with more than 61 million customers. The company is owned by AT&T Inc since December 2006 as a result of AT&T acquisition of BellSouth.

Cingular Telephone Operator was established through mergers and acquisitions, and as a result - as well as the rapid technological change in the wireless industry – Cingular owns and operates wireless networks using many different wireless communication standards. The ALLOVERTM network provides digital and data network to 100 U.S.Markets and more than 273 million people throughout the U.S. It has the advantage of unlimited mobile-to-mobile calling community around 61 million people and it is still growing.

Cingular offers Rollover® to its wireless customers to keep their unused minutes from month to month. With Cingular family plans, customers can also share minutes between lines. So if your father talks less than your mother, then your mother can use the minutes your father doesn't use. However, it is offered with some conditions, but it is working great.

Compared to other US cell-phone service operators, Cingular offers its customers the largest international coverage to make calls on 6 continents and 190 countries, with wireless data roaming in over 120 countries for laptops, PDA, and other data services. It offers an unprecedented selection of handsets and devices to meet every need in the US while travelling. On the media and entertainment, it offers excellent data products and services and access to some exclusive content from the top houses. Cingular offers user friendly pay-per-use option with GoPhone® . Recently it has introduced the next generation Push-to-Talk (PTT) service. The service operates across the largest Push-to-Talk coverage area in America, and brings a host of new, unmatched features like availability, quick group calling and convert to cellular.

Cingular Telephone Operator is known for its enterprise services, offered through its Business Markets Group, a subsidiary company of AT&T. Currently it offers services to 95 % of the Fortune 100 companies and more than 80 % of the Fortune 500 and more than 1200 Federal, state and local agencies of the government. Cingular has offered Motorola M900, a powerful and durable mobile voice solution for the needs of home-land security and emergency management professionals. The unit's physical design and specially designed vehicle interfaces are dedicated to deliver dependable and easily accessible communication so that the home-land security and emergency management professionals can stay connected when carrying out their professional tasks.

In January Cingular introduced the Blackjack TM, a slim smart device that appeal both to business customers and consumers alike. With this model, the customers get more entertainment features, business applications, Windows Mobile 5.0, and 3G-enabled broadband connect service. In wireless entertainment, it has introduced Cingular MusicTM. It gives the cingular customer access to some large collection of music content available on a wireless handset from online retailers like Napster, Yahoo, and XM Satellite Radio. In an exclusive arrangement with MySpace.com, a leading life-style portal, Cingular gives its customers the ability to edit MySpace profiles, view and add their friends, post photos and Internet blogs, send and receive My Space messages from their wireless mobile cell-phones.