- Go to the Settings tab.
- Select General.
- Update the software by tapping on it.
If a new software version for your iPhone is available, an update notification will appear. Back up all of your vital files and personal information before continuing to download and install the new software. Once installed, some software upgrades will immediately change your current settings. So you'll merely discover afterward that some options are no longer available or vice versa. It's always preferable to have a backup plan.