iOS 27 is available in Australia. It went live this week. Apple says to do a pre-update check first. You should back up your data. You should also review available capacity. The update brings new features. Siri has been revamped. New system tools are added. Compatibility covers iPhone 12 and later models. Recent iPads are compatible as well. Older devices like iPhone 11 miss out. Users are encouraged to prepare before updating. A backup is essential. Free space is needed. The rollout is happening now.