AT&T Mobility LLC is the wholly owned wireless subsidiary of AT&T Inc. AT&T Mobility, headquartered in Atlanta, Georgia,[2] is the second largest mobile phone company, in terms of number of subscribers, under Verizon Wireless. AT&T Mobility has approximately 78.2 million subscribers as of the first quarter 2009.
Formerly a joint venture between SBC Communications and BellSouth, Cingular Wireless soon acquired the old AT&T Wireless; SBC later acquired the original AT&T and re-branded as "the new AT&T". Cingular became wholly-owned by the new AT&T in December 2006 as a result of AT&T's acquisition of BellSouth.
In January 2007, Cingular confirmed it would rebrand itself under the AT&T moniker. The corporate name change occurred immediately, although, for regulatory and brand-awareness reasons, both brands were used in the wireless unit's signage and advertising during a transition period.[3] The transition concluded in late June, just prior to the rollout of the Apple iPhone