CSK Auto Selects AT&T for Voice, Data and Network-Integration Services

AT&T's Solution Will Drive Technology Growth for Retailer of Auto Parts

Phoenix, Arizona, July 11, 2007

AT&T Inc. (NYSE: T) has announced that CSK Auto Corp. (NYSE: CAO) has signed a new three-year contract with AT&T. Under the terms of the agreement, AT&T will provide CSK Auto with voice and data services, including a Multiprotocol Label Switching (MPLS)-enabled Virtual Private Network (VPN) for CSK Auto's headquarters, field and store locations. AT&T will also upgrade and integrate CSK Auto's network.

The AT&T VPN will provide CSK Auto with the flexibility and scalability to connect the company's headquarters location to all of its stores and field operations. The technology also gives CSK Auto the ability to prioritize data applications such as point of sale and a new human resources administrative application, as well as future Voice over Internet Protocol (VoIP) applications.

In addition to the AT&T VPN solution, AT&T will provide CSK Auto with voice and data services and audio and videoconferencing. AT&T also assisted CSK Auto with consolidation activities after CSK Auto's recent acquisition of Murray's Auto Parts.

"We were impressed with the breadth and depth of the various AT&T offerings, but the level of support we received from the AT&T account team made us feel even more comfortable with migrating a large portion of CSK Auto's communications components to AT&T," said Brian Woodworth, vice president of IT operations at CSK Auto. "AT&T was able to offer us cost-efficiencies and seamless network integration. We are confident that the services provided by AT&T will support future technological growth that will help us conduct our business more efficiently."

CSK Auto can also monitor the performance of its AT&T VPN services and its applications through the secure AT&T BusinessDirect® customer portal, which provides operational efficiencies that include around-the-clock online access to real-time network performance reports and direct connections to trouble-management systems.

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About CSK Auto
CSK Auto Corporation (NYSE: CAO) is the parent company of CSK Auto, Inc., a specialty retailer of automotive parts and accessories, operating 1,334 stores in 22 states (as of May 6, 2007). CSK serves both the do-it-yourself and the do-it-for-me markets, operating under four brand names: Checker Auto Parts in Hawaii, Rocky Mountain, Southwestern, and Northern Plains states; Schuck's Auto Supply in the Pacific Northwest and Alaska; Kragen Auto Parts in California; and Murray's Discount Auto Parts in the Midwest.

About AT&T
AT&T Inc. (NYSE: T) is a premier communications holding company. Its subsidiaries and affiliates, AT&T operating companies, are the providers of AT&T services in the United States and around the world. Among their offerings are the world's most advanced IP-based business communications services and the nation's leading wireless, high speed Internet access and voice services. In domestic markets, AT&T is known for the directory publishing and advertising sales leadership of its Yellow Pages and YELLOWPAGES.COM organizations, and the AT&T brand is licensed to innovators in such fields as communications equipment. As part of its three-screen integration strategy, AT&T is expanding its TV entertainment offerings. Additional information about AT&T Inc. and the products and services provided by AT&T subsidiaries and affiliates is available at www.att.com.

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