Before I updated to 4.3.3, I've been using 4.1 on my iP4 for 8 months. Finally decided to update to 4.3.3 from 4.1, and have been experiencing lag issues like it's going it's on liquidation sale. I've tried all tips, from rebooting the phone, to restoring phone as new. Lags still there. Swiping from page to page, launching, and quitting, even swiping the bar to wake from sleep has to be done 2 or 3 times before it does what it's suppose to do, or there is a 3-4 second delay before it does it. If anyone has/is experiencing this with 4.3.3, can you tell me if 4.3.5 has fixed this (if you've updated that is), or you don't notice it anymore. I'm actually afraid to update to 4.3.5, with iOS 5 just around the corner. Conspiracy thinking or not, the update before a major iOS release seems to always mess up people's iPhones pretty good. You know, kind of like "encouraging" them to update to the latest iOS, hoping that it may fix their current issues. I'm also a little apprehensive in updating to iOS 5, due to a very, very, very bad experience for 4 months and 4 iP 3GS later after upgrading to iOS 4. In the last couple of years, I've just learned to jump on updates or upgrades right away. And in my experience, am glad I don't (except with iOS 4). I haven't even upgraded to Lion. Been hearing a lot of unhappy experiences about that. But that's another story and thread. ;-) Thanks.