Various reports around the Web are highlighting a Consumer Reports survey pegging AT&T as the lowest-scoring cellphone carrier in the U.S on customer satisfaction.

The results are based on a survey of 58,000 readers at ConsumerReports.org. In a blog post, Consumer Reports notes that of all the carriers it rated, AT&T was the only one to drop significantly in overall satisfaction.

PC World notes that AT&T got an overall score of 60 out of 100. That's nine points shy of next-to-last carrier T-Mobile and six points down from last year.

More than half of the AT&T customers who participated in the survey own one of Apple's iPhones, which is still exclusive to AT&T.

"Our survey suggests that an iPhone from Verizon Wireless, which is rumored, could indeed be good news for iPhone fans," said Paul Reynolds, electronics editor for Consumer Reports.

From the Consumer Reports blog post:

"Consumer Reports data, reflecting all versions of the phone, found that iPhone owners were much less satisfied with their carrier and rated data service (Web and e-mail) lower than owners of smartphones on other carriers that, like the iPhone, have a host of apps to encourage heavy data use."

AT&T says it is working on solutions. "We take this seriously and we continually look for new ways to improve the customer experience," Fletcher Cook, spokesman for AT&T, told CNNMoney.

By Nancy Blair