"Hey Siri" support and possibly wireless charging case alongside AirPower charging mat.
Apple Releases iOS 9.3.1 With Fix for Web Link Crashing Bug
Today's iOS 9.3.1 release is available as an over-the-air update for all iOS 9 users and it can also be downloaded through iTunes. iOS 9.3.1 is the seventh update to iOS 9, following iOS 9.0.1, iOS 9.0.2, iOS 9.1, iOS 9.2, iOS 9.2.1, and iOS 9.3.
Shortly after iOS 9.3 was released, a number of iPhone and iPad users found Safari, Mail, Messages, Notes, Chrome and some other pre-installed and third-party apps would crash or freeze after tapping or long pressing on a web link. While most users affected were on iOS 9.3, some customers on earlier versions of iOS also complained of crashing problems.
The exact underlying cause of the problem has not been discovered, but there is speculation that it is related to Universal Links and the Shared Web Credentials daemon, which allows apps and websites to share login credentials. No quick fix has been available, but shortly after the bug was publicized, Apple said it was working on a fix and has made good on that promise in the iOS 9.3.1 update.
Any other changes found in the iOS 9.3.1 update will be listed below.