How to Update an iPhone May 17, 2021, 9:00 am EDT | 3 min read If you have an Apple iPhone, you might wonder whether you’re running the latest version of Apple’s iPhone operating system (called “iOS”). Here’s how to find out—and how to upgrade if there’s an update available. Table of Contents: Check for iOS Updates Using Settings The quickest way to find out whether there are iOS updates is by using the Settings app on your iPhone. First, make sure that your iPhone is connected to the internet so that it can communicate with Apple’s update servers. Then, open Settings by locating and tapping the gray gear icon.