I couldn't be anymore pissed about what upgrading my iPhone 3G to OS4 has done to the speed of my phone. Many of the apps have not be optimized for OS4, so they don't work correctly or don't work at all. I am shocked at how many app developers still have not fixed their apps so they work right with OS4. Even though they knew about the OS4 release, months in advance. Recently OS4 has gotten very sluggish, even with the native apps. It has gotten so bad that using my iPhone is getting to be a pain. I want my previous OS back! Seems like Apple screwed us over with this one, knowing we can't go back and our only other option would be to buy the iPhone 4.