The process of reverting an Apple mobile device’s operating system to a previous version is a complex procedure. It involves uninstalling the current iOS version and installing an older, compatible one. This is distinct from simply updating to the latest software, as it moves the device back to a prior state of operation. For example, a user might wish to return from iOS 16 to iOS 15.
The ability to undertake this action can be crucial for various reasons. Some users may experience compatibility issues with newer software versions, rendering essential apps unusable. Others may find that the updated OS negatively impacts battery life or overall device performance. Historically, this action has allowed users to retain functionality that was deprecated in later versions, or to leverage exploits present in older software for research or specific applications.