iOS 27 is out now in Australia. It rolled out this week. Apple says to do a pre-update check first. You should back up your data. You should also confirm free storage. The update adds new features. Siri has been rebuilt. Additional system apps are added. Compatibility includes iPhone 12 and later models. Recent iPads are compatible as well. Older devices like iPhone 11 are left out. Users are encouraged to prepare before updating. A backup is a good idea. Free space is needed. The rollout is being released.