iOS 9 Stable Version
iOS 9.0.2 is yet another minor update that fixes the issues you saw in earlier iOS 9.0 and iOS 9.0.1 firmware. This iOS 9.0.2 update fixes major issues including the inability to toggle cellular switch, problem with Podcasts app, orientation issue, iCloud backup error, etc.
-> Like iOS 9.0.1, the iOS 9.0.2 update is geared towards fixing old problems - and no new features were added
-> We have been told that iOS 9 still lags after updating to iOS 9.0.2. This issue is mainly visible on iPhone 6s and iPhone 6s Plus.
iOS 9.0.1 is released with the focus to fix bugs and errors visible on devices running on iOS 9.0. Many major issues - related to installation, cellular data, and alarm - are fixed when you update to iOS 9.0.1.
-> iOS 9.0.1 is a minor update released only to fix the problems - there are no new featured added to it.
-> We recommend iOS 9.0 users to update to iOS 9.0.1 over-the-air (and not through iTunes) to save bandwidth.
New iOS 9.0 is the first stable update released to the public. Compared to iOS 8, it comes with a new set of features, a different font, and lots of minor changes with bug fixes.
iOS 9 Version: iOS 9.0 Stable
iOS 9.0 Build number: 13A344
-> Apple iOS 9.0 is compatible with all the iPhone, iPad, and iPod Touch models listed in our compatibility page.
-> If you are new to iOS 9, read this post to get a quick overview: Apple Releases iOS 9