Apple yesterday has stopped signing iOS 12.3, iOS 12.3.1, and iOS 12.3.2
following last Monday's release of iOS 12.4. This prevents users from
downgrading from iOS 12.4 to a previous version of iOS
Apple generally stops signing older releases of iOS within a few weeks of
releasing an update to the public. iOS 12.4 was released to the public last
Monday after an extended beta testing period with developers.
When Apple stops signing an iOS version, it means users are no longer able
to downgrade to that version via iTunes. Downgrading is common among users
who are waiting on jailbreak updates, but the functionality is sometimes
also useful to those who experience significant bugs after updating to the
newest version of iOS.
iOS 12.3.1 was originally released in May
<https://9to5mac.com/2019/05/24/ios-12-3-1/> with bug fixes pertaining to
VoLTE and iMessage. iOS 12.3.2 was released several weeks later
<https://9to5mac.com/2019/06/10/ios-12-3-2-release-today/> with Portrait
mode bug fixes in the Camera app, but it was only made available for iPhone
8 Plus users.
Rounding out the recent iOS updates, Apple released iOS 12.4 last Monday
<https://9to5mac.com/2019/07/22/ios-12-4-release/> . The update did make
many user-facing changes, but it does
lay the groundwork for the forthcoming release of Apple Card.
Tim Cook confirmed on Tuesday that Apple
<https://9to5mac.com/2019/07/30/apple-card-august-release-confirmed/> will
release Apple Card in August. It's currently being tested by Apple employees
running iOS 12.4.
Apple is also currently beta testing iOS 13
<http://9to5mac.com/guides/ios-13> , which will be released to the public in
September.
By Chance Miller at:
https://9to5mac.com/2019/07/31/apple-stops-signing-ios-12-3-1-and-ios-12-3-2
-following-release-of-ios-12-4
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