Chatters are growing happier with their overall wireless service, according to a new survey, with Verizon Wireless taking top honors and Sprint slipping into last place among the four big carriers. That said, overall scores for customer satisfaction fell somewhat short of the stratosphere.

The results come courtesy of the American Customer Satisfaction Index, which rates various industries and companies on a scale of 1 to 100 based on national phone surveys.

The scores? Overall wireless service garnered a 68, the highest score in the four years that the index has been tracking wireless satisfaction—not bad, but not exactly what I'd call an A+.

Verizon Wireless scored a 72 in the survey, giving it top marks among the four big wireless carriers. AT&T and T-Mobile both tied at 71, with AT&T gaining the most ground thanks to its four-percent spike since 2007 (thanks, in part, to the iPhone, according to ACSI researchers).

Meanwhile, Sprint's ACSI rating fell to just 56, an 8 percent drop from last year. What happened? Well, the struggling carrier's decision to slash 5,000 jobs last year—with another 4,000 to come—could have something to do with it, ACSI researchers said.

Just for comparison's sake, the spiraling airline industry got an ACSI score of 62 (tumbling almost 14 percent from 1994), the U.S. Postal Service got a 74 (up from a score of 61 in 1994), FedEx scored an 85, and both McDonald's and Microsoft made do with a middling 69.

How's your carrier been treating you lately? Care to grade 'em on your own scale of 1 to 100? Fire away!

Related:
ACSI news 2008