Sprint Nextel Corp (NYSE: S) has significantly improved their customer service rating on the American Customer Satisfaction Index this year.

During the last several years, Sprint customers were relatively dissatisfied with their service compared to what the company’s competitor’s customers rated their wireless providers.

The American Customer Satisfaction Index measures customer expectations, complaints, loyalty, perceived value and perceived quality and calculates a score between 0 and 100.

In 2008, Sprint received a score of 56, meanwhile AT&T, T-Mobile and Verizon all received scores above 70. Sprint received a 70 rating this year, a 14-point improvement.

“In the last six years of the ACSI survey, no other company has improved its satisfaction score by that many points in a two-year period,” Sprint’s announcement said Thursday. Sprint said that its gains reflect its customer’s better perceived value than what AT&T or Verizon offer.

Sprint has improved its quality of service and customer satisfaction during CEO Dan Hesse’s two years on the job. Sprint also recently launched the HTC Evo, a popular Android-based smart-phone with 4G wireless technology.

Sprint is not without its problems though. Over the weekend, Sprint’s “My Sprint Online” website had issues and the company is still having trouble keeping the HTC Evo in stock.

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