iOS 27 is out now in Australia. It arrived 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 adds new features. Siri has been given an overhaul. Fresh system utilities are added. Compatibility covers iPhone 12 and later models. Recent iPads are also supported. Older devices like iPhone 11 miss out. Users are advised to prepare before updating. A backup is recommended. Free space is required. The rollout is happening now.