iOS 27 is available in Australia. It went live this week. Apple says to do a pre-update check first. You should save your important files. You should also check storage space. The update brings new features. Siri has been given an overhaul. Fresh system utilities are added. Compatibility covers iPhone 12 and later models. Recent iPads are compatible as well. Older devices like iPhone 11 do not qualify. Users are told to prepare before updating. A backup is a good idea. Free space is needed. The rollout is underway.