T-Mobile still has plenty of work to do according to a new JD Power award that once again shows the carrier bringing up the rear in Volume 2 of the Wireless Purchase Experience. The semi-annual study evaluates “the wireless purchase experience of customers using any one of three contact channels: phone calls with sales representatives; visits to a retail wireless store; or online. Overall customer satisfaction with both full-service and non-contract branded carriers is … [read full article]