The process of returning a device operating on a newer iOS version to a prior version, specifically iOS 18, involves a technical procedure known as downgrading. This action essentially reverses an update, restoring the device to its previous software state. For instance, a device currently running a hypothetical iOS 19 would be reset to function under iOS 18.
Downgrading offers several potential benefits. Users might prefer an older iOS version due to perceived performance improvements, a desire to avoid bugs present in newer releases, or compatibility issues with specific applications that have not yet been updated. Historically, users have downgraded to maintain functionality with jailbreaking tools or to retain access to features removed in subsequent updates.