iPhone 4S network speed: Sprint vs AT&T vs Verizon
If network speed means a lot to you, here is a video comparison of iPhone 4S with 3 different network speeds in the US. You can choose between AT&T, Sprint and Verizon. The test shows the loading of websites, video and also runs SpeedTest application on all three networks. Guess, who is the winner.
Just remember that you might get different results, because it depends on your location.