A couple of weeks ago, the guys from Cupertino released iOS 15.1.1, for the iPhone 12 and iPhone 13, with an important novelty that fixed a problem with missed calls. As is usual, after the usual 2-week period, Apple has stopped signing the previous version, iOS 15.1.
But, unlike on previous occasions, Apple It has only stopped signing iOS 15.1 on the iPhone 12 and iPhone 13 range, since in the rest of compatible iPhone and iPad devices, they still have the possibility of returning to iOS 15.1.
When Apple stops signing an iOS version, when the user tries to activate the device, they think without going beyond that screen, inviting the user to update the latest version available at that time.
The reason is none other than keep user protected at all times before the security problems that have been patched in the most recent versions.
Although it is true that you can downgrade if you have previously made a backup copy of the .shsh2 files and through third-party tools, the process is not easy and is only used for users who they keep jailbreaking their devices.
At the time of publishing this article, there is no public jailbreak for iOS 15 and iPadOS 15, por lo que en teoría, los usuarios que tengan la intención de hacerlo en un futuro, pueden actualizar o esperarse un tiempo prudencial a ver si la comunidad de anima, aunque desde Actualidad iPhone siempre os recomendamos actualizar a la última versión pasados unos días desde su lanzamiento, cuando la comunidad la ha descargado y ha comprobado que no ofrece ningún problema de rendimiento, consumo de batería…