As more wireless users switch to smartphones, many retailers are readjusting their mobile strategies to address the needs of these users, according to a new study by J.D. Power and Associates. The semiannual report analyzed evaluations from customers who recently had an in-store wireless retail sales experience. Overall customer satisfaction with major wireless carrier-branded stores is based on four factors. In order of importance, they are: sales staff (49%); price and promotion (27%); store facility (14%); and display (10%).