A federal judge in New York dismissed lawsuits that alleged Cingular Wireless, Verizon Wireless, Sprint Nextel and T-Mobile USA forced customers to purchase handsets that worked exclusively on their own networks. "The plaintiffs have not presented sufficient evidence to prove that any one defendant has the degree of market power necessary to sustain a tying claim or show that any of the defendants' alleged tying arrangements has an actual adverse effect on competition in the U.S. market for wireless handsets," U.S. District Judge Denise Cote said in her decision.

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