Update software on iPhone, iPad, or iPod touch in iTunes on PC
Using iTunes, you can update software on your iPhone, iPad, or iPod.
Connect your device to your computer.
You can connect your device using a USB or USB-C cable or a Wi-Fi connection. To turn on Wi-Fi syncing, see Sync iTunes content on PC with devices on Wi-Fi.
In the iTunes app on your PC, click the Device button near the top left of the iTunes window.
Click Check for Update.
To install an available update, click Update.
Important: Before disconnecting your device from your computer, click the Eject button .