Customer care performance scores are higher among wireless customers with additional plan features, according to a new report by J.

D. Power and Associates.Customer care performance score were higher among customers with additional plan features, such as extended handset warranties 770 on a 1,000 point scale, on average and unlimited calling to a predefined group of people 767, than among customers with base calling plans 699.Customer care performance score average 749 among customers with unlimited text and photo messaging options included in their plans.