How to update iPhone, iPad, or iPod touch using iTunes

If you can’t update wirelessly, or if you want to update with iTunes, follow these steps:

1. If you use your device’s Personal Hotspot for your computer’s Internet connection, update your device wirelessly or connect your computer to another network.
2. Install the latest version of iTunes on your computer.
3. Plug in your device to your computer.
4. In iTunes, select your device.
5. In the Summary pane, click Check for Update.
6. Click Download and Update.