AT&T Mobility 8-K Cingular Wireless Corrects Number of Customers Reported at End of Second Quarter of 2005

Cingular Wireless LLC

	Quarter Ended 6/30/2005									Year to Date
	Previously			As						Previously			As
(Amounts in millions, except customer data in 000s)	Reported			Corrected			Difference			Reported			Corrected			Difference
Total Cellular/PCS Customers1		51,596			51,442			(154	)		51,596			51,442			(154	)
Net Customer Additions — Cellular/PCS		1,071			952			(119	)		2,490			2,319			(171	)
Gross Additions		4,384			4,292			(92	)		9,147			8,964			(183	)
M&A Activity, Partitioned Customers and/or Other Adjs.		156			140			(16	)		(3	)		(9	)		(6	)
Churn — Cellular/PCS2		2.2	%		2.2	%	0 BP				2.2	%		2.2	%	0 BP
ARPU — Cellular/PCS3	$	50.43		$	50.51		$	0.08		$	50.01		$	50.06		$	0.05
Minutes Of Use Per Cellular/PCS Subscriber4		704			705			1			674			674			-
Penetration — Cellular/PCS5		18.0	%		18.0	%	0 BP				18.0	%		18.0	%	0 BP

	Quarter Ended 3/31/2005									Year to Date
	Previously			As						Previously			As
(Amounts in millions, except customer data in 000s)	Reported			Corrected			Difference			Reported			Corrected			Difference
Total Cellular/PCS Customers1		50,369			50,350			(19	)		50,369			50,350			(19	)
Net Customer Additions — Cellular/PCS		1,419			1,367			(52	)		1,419			1,367			(52	)
Gross Additions		4,763			4,672			(91	)		4,763			4,672			(91	)
M&A Activity, Partitioned Customers and/or Other Adjs.		(159	)		(149	)		10			(159	)		(149	)		10
Churn — Cellular/PCS2		2.2	%		2.2	%	0 BP				2.2	%		2.2	%	0 BP
ARPU — Cellular/PCS3	$	49.59		$	49.60		$	0.01		$	49.59		$	49.60		$	0.01
Minutes Of Use Per Cellular/PCS Subscriber4		642			643			1			642			643			1
Penetration — Cellular/PCS5		17.7	%		17.7	%	0 BP				17.7	%		17.7	%	0 BP

	Quarter Ended 12/31/2004									Year to Date
	Previously			As						Previously			As
(Amounts in millions, except customer data in 000s)	Reported			Corrected			Difference			Reported			Corrected			Difference
Total Cellular/PCS Customers1		49,109			49,132			23			49,109			49,132			23
Net Customer Additions — Cellular/PCS		1,713			1,699			(14	)		3,352			3,338			(14	)
Gross Additions		4,930			4,914			(16	)		12,666			12,650			(16	)
M&A Activity, Partitioned Customers and/or Other Adjs.		21,724			21,761			37			21,730			21,767			37
Churn — Cellular/PCS2		2.6	%		2.6	%	0 BP				2.7	%		2.7	%	0 BP
ARPU — Cellular/PCS3	$	49.51		$	49.51		$	0.00		$	49.68		$	49.68		$	0.00
Minutes Of Use Per Cellular/PCS Subscriber4		617			617			(0	)		584			584			-
Penetration — Cellular/PCS5		17.2	%		17.2	%	0 BP				17.2	%		17.2	%	0 BP

Notes:

1	Cellular/PCS customers include customers served through reseller agreements.
2	Cellular/PCS churn is calculated by dividing the aggregate number of cellular/PCS customers who cancel service during each month in a period by the total number of cellular/PCS customers at the beginning of each month in that period.
3	ARPU is defined as cellular/PCS service revenues during the period divided by average cellular/PCS customers during the period.
4	Total Minutes Of Use Per Cellular/PCS Subscriber is defined as including Local Minutes of Use and Outcollect Minutes of Use.
5	Penetration calculation for 2Q05 is based on licensed “operational” POP’s of 286 million.