The action allows an iPhone, iPad, or iPod touch user to uninstall the currently installed operating system and reinstall an older version of iOS. As a practical example, a user who updated to iOS 17 and experienced significant performance issues or app incompatibilities might choose this process to return to the more stable iOS 16.
This option provides users with greater control over their device’s functionality and performance. Historically, it has been a valuable recourse for individuals facing bugs, reduced battery life, or diminished speed following an operating system update. The ability to return to a familiar and functional environment can be especially beneficial for users reliant on specific applications that may not yet be fully compatible with the latest software version.