Hey, sorry for the delayed reply! Honestly, it is noticeably slower than a perfect AT&T connection was on the iPhone 4. I only normally check Facebook, Twitter, email and a few blogs on the go, and you can tell it's not as zippy. That being said, at least where I am in Chicago, the connection availability is more consistent under Sprint than it was under AT&T. My commute to work was an endless series of dead zones.