Based on responses from 7,556 full-service wireless customers from January through June, the study looks at how U.S. carriers provide customer service through phone and walk-in. More specifically, JD Power looked at how contacting carriers by phone and going to one of their stores related to the efficiency of problem resolution and how long you were put on hold, just to name a few factors.
With that said, AT&T came out on top with 820 points, with T-Mobile right behind it with 815. Meanwhile, Verizon came in third with 797 points, and Sprint came in last with 750 points, with the overall average sitting at 804 points. All points are based on a 1,000 point scale