Wireless phones from Sony Ericsson received the highest overall customer satisfaction performance ratings in the latest J.D. Power and Associates study of U.S. customers.

Sony Ericsson, a joint venture of Sony and Ericsson which has a large research and development operation in RTP, finished first in the J.D. Power survey of Canadian customers as well.

“Sony Ericsson continues to show a strong commitment to the North American market with an expanding portfolio of compelling devices for every consumer,” said Najmi Jarwala, president of Sony Ericsson North America. “Receiving the top ranking in the J.D. Power and Associates study is a reflection of Sony Ericsson’s ongoing ability to deliver eye-catching, feature-rich and high-quality products that enhance the consumer experience.”

The study was based on five factors: physical design, operation, features, handset durability and battery function.