iOS 17.1 update, this release is focused on security fixes.
1. Go to iPhone Settings, head to General > then Software Update.
2. Let your iPhone refresh the page and allow the update to reflect.
3. Now, you can either choose to update immediately or update later in the night.
4. Choose Update now. Your update should begin downloading.
5. Once it's downloaded, your iPhone will prompt you if you want to install it now—proceed to install it.
6. That's it! In a few minutes, your iPhone should be done updating to the latest available software.