T-Mobile had the highest ranking for wireless retail sales satisfaction in the J.D. Power survey, with 716 out of 1,000 points, followed by Alltel (714), Verizon Wireless (706), AT&T (693) and Sprint Nextel (654). Scores declined in four areas that J.D. Power says drive overall wireless retail sales satisfaction. Ranked by importance, they are: sales staff (51%), store display (17%), store facility (16%) and price/promotion (16%).