Verizon Wireless and AT&T Mobility are the largest carriers in the U.S. market, and the two are neck and neck in a few other key metrics as well, according to the results of a March survey released by ChangeWave. AT&T leads Verizon slightly in terms of customer loyalty--only 9 percent of AT&T customers said they would switch carriers in the next six months, compared with 11 percent of Verizon customers. However, 33 percent of all customers surveyed who say they would switch their carrier within the next six months said they would move to AT&T; 24 percent said they would switch to Verizon. But all is not lost for the nation's largest wireless carrier, though, as Verizon wins handily in customer satisfaction and has the lowest frequency of dropped calls, according to the survey. Article