The top five U.S. wireless operators saw nearly a quarter of their subscribers leave them in the past four quarters. These customers weren't giving up wireless service; they were going to other carriers they perceived as having more to offer. With more than nine out of 10 U.S. online consumers owning a mobile phone today, wireless operators must focus on winning over their competitor's best customers without forfeiting their own, according to a recent report from Forrester Research.
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