Preparing for the update
If an update is available, you have to connect to Wi-Fi in order to download it.
At almost every office, we provide an SSID called Seneca iOS, that is ONLY to be used for iOS updates:
Settings > Wi-Fi > Choose a network... > Seneca iOS (Do NOT connect to the SSID: Seneca Companies)
Seneca provided iPhones and iPads are pre-configured to connect to the SSID: Seneca iOS (no pre-shared key will be needed)
If you don't see the SSID named Seneca, that's okay. Any public or home Wi-Fi connection will also work for this process.
Performing the update
From your Apple device, go to Settings > General > Software Update
The update requires 50% or greater battery life and takes about 30-45 minutes.