Apple stops signing iOS 15.4.1 after iOS 15.5 release, downgrade no longer possible

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Apple stops signing iOS 15.4.1 after iOS 15.5 release, downgrade no longer possible
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After the release of iOS 15.5 on May 16, Apple stopped signing iOS 15.4. Since iOS 15.4.1 is no longer signed, it is not possible to downgrade to that version of iOS after installing iOS 15.5.

iOS 15
Apple regularly stops signing older versions of software updates as new releases arrive to encourage customers to keep their operating systems up to date, so it’s not uncommon for iOS 15.4. .

iOS 15.4.1 was a minor update that fixed an issue that could cause the iPhone’s battery to drain rapidly after the release of iOS 15.4. It also addressed the AppleAVD issue that could allow an application with kernel privileges to execute arbitrary code, which Apple said was actively exploited.

iOS 15.5 added an Apple Cash feature for requesting and sending money along with new features for podcasts and a fix with home automation. It also includes several security updates, and those who haven’t updated to iOS 15.5 yet should do so for this reason.

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