Keep Your iPhone Up to Date
New software gives you features, performance boosts, and security fixes. Not to mention that your iPhone often feels snappier after a big update. You also get newer designs and small quality-of-life features to make your days a little better.
Needless to say, updating your iPhone, especially when a big update drops, is the best way to give you that sense of a new device. To update your iPhone, simply go to Settings > General > Software Update.
If you see a new version of iOS available, tap Download and Install and wait for your iPhone to do its thing.
Additionally, you can turn on Automatic Updates on the same screen so your iPhone updates itself without extra work. After it reboots, take a moment to explore the new features so you can take advantage of them right away.