https://wccftech.com/ios-12-5-4-and-ipados-12-5-4-security-update-released-for-older-iphones-and-ipads/ > Apple has released iOS 12.5.4 and iPadOS 12.5.4 updates for older iPhone and iPad models, including the iPhone 6, iPhone 5s, iPad Air, more. > If you have one of the above mentioned devices, then you can go ahead and install this update right away. Keep in mind, this is not a feature-adding update, instead it focuses on security.