J.D. Power: Verizon has best call quality nationwide, T-Mobile consistently belowing average

J.D. Power, that well known arbiter of human opinion in the United States, has just released its latest study on customer satisfaction with wireless carriers. It addresses such things as (the lack of) dropped calls, failures to connect, voice distortion, echoes, static, and late-arriving text messages, and ultimately churns out a rating out of five stars relative to the regional average and other carriers. In testing done between July and December last year, Verizon had the best or tied for the best satisfaction ratings in five of the six studied areas, while AT&T and Sprint traded blows for second and T-Mobile had to admit defeat as the laggard of the top four. US Cellular managed to score highest in the North Central region, but J.D. Power's overall assessment isn't very rosy for any of the carriers -- the stats collector says growing smartphone usage, heavy texting and more indoor calls are collectively causing call quality to stagnate, and even warns that "increased adoption of smartphones and wireless tablets may continue to compromise the quality of network service."