This news will come as no surprise to those using iPhones in US big cities. PCWorld did a test of the big three wireless carriers in the nation's 13 largest metro areas. They found that while AT&T holds their own in terms of speed, they trail far behind Sprint and Verizon in terms of reliability, the most important aspect of mobile communications. In fact, only about 2/3rds of AT&T's connections went through at acceptable levels. As New Yorkers, we can independently verify that figure, and add it might even be a little high.
AT&T has made mention of upcoming improvements to their service in metro areas
