How to upgrade iOS 12.5 to iOS 16. There are multiple steps to follow to upgrade iOS 12.5 as well as iOS 16. Make sure your device supports iOS 16. Backup to iCloud or iTunes. Go to Settings once you're connected to a stable WiFi network. General, Software update. Install iOS 16. Accept the terms and conditions on screen. After restarting, you can use your Apple ID to set up iOS 16. Backup data and restore it, reinstall software, and alter settings. Take advantage of iOS 16's enhancements! This video will show you how to upgrade from iOS 12.5 (or earlier) to iOS 16 step-by-step.

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