…from:
http://www.jdpower.com/content/press-release/RDbY51O/2013-u-s-wireless-smartphone-satisfaction-study.htm

2013 U.S. Wireless Smartphone Satisfaction Study--Volume 2

10/17/2013
J.D. Power Reports:
Both Apple and Samsung Lead in Overall Satisfaction Performance among the U.S. Wireless Tier 1 Carriers, Excelling in All Smartphone Experience Factors

Apple Smartphone Devices Rank Highest among Customers of AT&T and Verizon Wireless Carriers; Samsung Ranks Highest among Sprint and T-Mobile Customers

WESTLAKE VILLAGE, Calif.: 17 October 2013 -- Apple and Samsung are the only smartphone brands to achieve overall satisfaction scores that are at or above the study average in all four performance factors, according to the J.D. Power 2013 U.S. Wireless Smartphone Satisfaction StudySM--Volume 2 released today.