iTunes

Apple stops signing iOS 15.3.1, ending ordinary downgrades from newer iOS 15.4

Downgrade iOS 15

Following a rigorous beta period, Apple unleashed its iOS & iPadOS 15.4 software updates for iPhone and iPad last Monday with huge upgrades, such as being able to unlock an iPhone with Face ID while wearing a mask and support for Universal Control, among other things. As we come up on a full week after the release, it’s unsurprising to see that Apple has now stopped signing the previous release: iOS & iPadOS 15.3.1.

Apple stops signing iOS 15.0.2, killing downgrades from iOS 15.1 just one week after launch

Downgrade iOS 15

Apple last Monday released iOS & iPadOS 15.1 to the general public following a lengthy beta testing period with a bevy of enhancements for the company’s mobile operating systems. Those enhancements comprised of SharePlay, support for COVID-19 vaccination cards in the Wallet app, an automatic macro toggle for the Camera app, and a plethora of bug fixes among other things.

With iOS 15.0.1 having been available for a while, Apple stops signing iOS 15.0

Downgrade iOS 15

Apple released iOS & iPadOS 15.0.1 on October 1st, marking the first update to the company’s new mobile operating systems with bug fixes. Notably, this update resolved a problem with Unlock with Apple Watch not working correctly with the brand-new iPhone 13 lineup – an exceptionally valuable feature amid a raging pandemic in which mask-wearing has become a common sight.

Now that some time has passed since Apple released iOS & iPadOS 15.0.1, it’s no surprise to see that Apple is closing the signing window for the original iOS & iPadOS 15.0 firmware that launched to the general public just two weeks prior.