T-Mobile

T-Mobile

T-Mobile

Editors' note: Because evaluating wireless coverage requires experience with the network in a wide variety of physical locations, CNET does not rate wireless carriers. We can, however, tell you everything you need to know about the major carriers. We invite your feedback and ratings in our user opinions section--the more input we get from around the U.S., the better our users can evaluate coverage at a national level. For more carrier information, please see CNET's Quick Guide.

The second-largest GSM carrier, T-Mobile, grew out of the former VoiceStream Wireless in 2001 when VoiceStream was acquired by Germany's Deutsche Telekom. T-Mobile operates one of the smaller U.S. networks of the big four carriers, but it has roaming agreements with AT&T and other smaller operators. In 2008, it launched its 3G network and last year introduced contract-free service.

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