The act of reverting an iPhone’s operating system to a previous version is a complex procedure. Such a process involves replacing the current iOS, the software that governs the functionality of Apple’s mobile devices, with an earlier iteration. An example would be moving from iOS 16 back to iOS 15 on a compatible iPhone model.
This undertaking can be significant due to several factors. It might be performed to address performance issues experienced after an update, to regain compatibility with certain apps that are no longer supported by the newer OS, or because the user simply prefers the interface or features of the prior version. Historically, this was a more common practice, especially when updates introduced bugs or significantly altered device behavior. However, Apple actively discourages this procedure, as older iOS versions lack the latest security patches and features.