AT&T Sued by Cellular South Over Planned Purchase of T-Mobile

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AT&T Inc. was sued by Cellular South Inc., the ninth-largest wireless carrier by customers, in an effort to block its acquisition of T-Mobile Inc. based on claims their combined market power violates U.S. antitrust laws.

Cellular South, in a complaint filed yesterday in federal court in Washington, said the merger “threatens to substantially lessen competition” and cause it significant losses and damages.