How is the coverage of cingular phones?

AT & T Mobility LLC is a subsidiary of mobile fully abosorbida by its parent company AT & T Inc. is headquartered in Atlanta, Georgia, United States, currently serves more than 92.8 millioncustomers, 3 thus becomes one of wireless telecommunication providers largest U.S. after Verizon Wireless. For the third quarter of 2010, AT & T Inc. reported 2.6 million new customers, bringing the difference between these two companies only 400,000 customers. Total revenues for AT & T Inc., in 2009 was $53,597,000, an increase of $4,262,000 representing a 8.6 per cent compared with 2008 results.
Originally Cingular Wireless LLC, (commercial alliance between SBC Communications and BellSouth), acquired the old AT & T Wireless Services Inc. in 2004, SBC Communications acquired the original AT & T Corporation, noted "The New AT & T" (The New AT & T). Cingular Wireless has thus become the headquarters of The New AT & T in December 2006 as a resultof the acquisition of BellSouth by AT & T Inc.
In January 2007, Cingular Wireless confirmed that it could be renamed under the former name of AT & T Corporation. Although the trade name change did not occur immediately, both for legal reasons as had already positioning the brand among the general public, these two brand names were used in company logos and advertising during the transition, it ended in April to late June, just before the launch of Apple's iPhone.

Among the services that AT & T Mobility promoted aggressively in the United States, was the service of conservation of minutes (Rollover Minutes Service), 5 in Its Popular Nation (Nation) so that allowed their customers to keep unused minutes in pass the current month and next month for a twelve month cycle.
From July 2007, AT & T Mobility allows subscribers to plan AT &T Unity (Unidad AT & T or AT & T United, double meaning in English that was used in advertisements and commercials), take the service of conservation of minutes, which Nation plan was unique. In addition, in 2007, AT & T Mobility launched its video sharing in real time, with the camera built into the phone, this service was the possibility of transmitting a video call from one phone to another via the 3G network telephones in this capacity.
AT & T Mobility launched on September 20, 2009, a program called A-List (List-A), similar to My Circle (My Circle) Alltel Corporation (which was subsequently adopted by Verizon Wireless with the name of Friends & Family {Friends and Family}).
Subscribers to the individual plan of USD $ 59.99 Nation orhigher value, the program could use A-List, with the service of conservation of minutes included, and select up to five national telephone numbers to call any time, including phones and mobile numbers of any operator, without using any plan minutes. FamilyTalk plan subscribers (Charles-family) plans $ 89.99or greater value, could select up to ten numbers which any person in the family subscribed to the plan, he could talk as much as quisiese.