I recently (like, very late May or very early June 2011) got a notification on my Sprint HTC Evo that a system update was available. I went ahead and installed it. I'm not impressed by any alleged improvements, and now don't have "call duration" showing up in my call history like it used to. Is there a way to uninstall this update and revert to the previous version? (My phone shows it has Android ver. 2.3.3, build 4.22.651.2)
