Apple releases new iOS 9.0.2 update to the public on wednesday, the update fixed a major lock screen security flaw that allowed access to our devices without passcode.
The flaw allowed anyone to access photos and contacts stored on your device and protected by passcode and touch ID with unlocking it.
The problem only affected iOS devices with four-six digit passcodes, and it could be eliminated by disabling Siri at the lock screen, but it was still a concern, and the flaw was present in both the intial release of iOS 9, and the more recent 90.1 update.
It’s not present in iOS 9.0.2. Apple release notes do not mention it, the new update was fix the flaw and they do other improvements in this update.
If you want to update your device there are two ways:-
1. Plugging your device with itunes on your pc.
2. Directly go to the settings and go to update section under general section and update.