AT&T is the absolute bee's knees in customer care among the big four carriers. That's if you're listening to J.D. Power, anyway, which finds that longtime champion Verizon is no longer the best at solving its customers' problems. As a precaution, this study is rather narrow in scope and considers just three components of customer care: telephone assistance, online support and in-store personnel. Naturally, this means important factors such as coverage, data speed and call quality aren't considered -- look to