Due to federal regulators' inability to get a clear signal about the dangers to consumers of massive telecommunications mergers, nearly the entire national cellphone market already is served by just four big carriers - Verizon, AT&T, T-Mobile and Sprint. Soon, unless the Federal Communications Commission and the Department of Justice intervene to stop the $26.5 billion merger of T-Mobile and Sprint, 98 percent of the market will be served by just three carriers.
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