A new survey from ChangeWave Research reveals that the firm's business-focused survey base is seeing the highest percentage of dropped calls (4.5%) on AT&T, easily exceeding performance leader Verizon (1.5%), as well as Sprint (2.4%) and T-Mobile (2.8%).
![111315 dropped calls](http://images.macrumors.com/article/2010/05/05/111315-dropped_calls.gif)
Not only is AT&T trailing the other major U.S. carriers, but the poor performance is part of a trend of increasing drop calls against the background of improving performance from rival Verizon, as well as major investments made by AT&T to address performance in some of its most troubled markets.
![111315 verizon vs att dropped](http://images.macrumors.com/article/2010/05/05/111315-verizon_vs_att_dropped.gif)
The survey notes that the percentage of dropped calls for each carrier closely mirrors customer satisfaction, with 49% of survey respondents on Verizon indicating that they are "very satisfied" with their carrier, while only 23% of AT&T customers in the survey pool indicated the same.
![111316 service provider satisfaction](http://images.macrumors.com/article/2010/05/05/111316-service_provider_satisfaction.gif)
ChangeWave's study focused on voice services, where AT&T apparently continues to struggle. A study released earlier this year indicated that AT&T's data service has improved markedly in most markets, pushing the carrier to the top of the heap by many metrics.