America's top wireless network is...

Verizon.
 
CNNMoney reports on the results of market research firm RootMetrics, which ranks Verizon as No. 1. AT&T was second, T-Mobile third and Sprint came in fourth.
 
Researchers travelled the country testing reliability, speed, call and data performance. T-Mobile, which recently focused network upgrades in urban areas, performed well at the city level, the report states.

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