Update Safari on iPhone
Safari is the default browser which comes pre-installed on all iPhones. Keeping Safari on iPhone up to date requires you to keep your iPhones underlying operating system (known as iOS) up to date. As long as you're running the latest version of iOS, you'll also have the latest version of Safari.
Update iOS to get the latest version of Safari
We've written a detailed guide to help you update iOS on iPhone. If you follow this guide you'll easily update your iPhone and get the latest version of Safari.