Cellular South announced on Monday that it would join Sprint and the U.S. Department of Justice in challenging AT&T's proposed $39 billion merger with T-Mobile in court.
"AT&T's proposed takeover of T-Mobile would profoundly impact the interests of the wireless industry as a whole," Eric Graham, Cellular South vice president for strategic & government relations, said in a statement. "If AT&T were to complete this deal, not only would it substantially lessen competition, but it would essentially consolidate the market into the hands of the 'Big Two' - AT&T and Verizon."
The Justice Department filed suit to block the merger last month and on Sept. 6 Sprint announced a lawsuit of its own.
Cellular South now joins the legal fight, despite doubts from legal experts who wondered why Sprint would enter the court fight.