When iOS 4 first launched, a few features were held back from older versions of the iPhone. The same has happened with iOS 5 although the list of unavailable features isn’t as dramatic as seen in earlier versions of the OS.
First the good news. From what we understand, iOS 5 works great on older hardware such as the iPhone 3GS. Notifications work well and the scroll down notification pane is fully functional with no lag. Twitter integration is also available for 3GS owners.




