Keep iOS up to date
Hackers occasionally find flaws in Apple’s coding which they can exploit, potentially giving them access to your personal data. New iOS updates are Apple’s way of combatting the exploits by patching any holes in the OS while implementing better stability enhancements.
To update to the latest version of iOS ,open the Settings app and tap General > Software update. You’ll either be welcomed by a note letting you know you’re already running the most up to date version of iOS, or be prompted to download and install the latest update.
The latest version of iOS is iOS 11, but point updates for iOS 11 are regularly released so it’s important to keep an eye out for those.