Following the discharge of iOS 12.Four on July 22, Apple has stopped signing iOS 12.3.1 and iOS 12.Three the earlier variations of iOS that had been out there to customers. Apple can be now not signing iOS 12.3.2, an replace unique to the iPhone 8 Plus.
iPhone, iPad, and iPod contact house owners who’ve upgraded to iOS 12.Four will now not have the ability to downgrade to iOS 12.3, 12.3.1, or 12.3.2.
iOS 12.4, out there on all units capable of run iOS 12, was a significant replace with Apple News+ enhancements and a brand new device-to-device knowledge migration possibility when establishing a brand new iPhone.
Apple routinely stops signing older variations of software program updates after new releases come out to be able to encourage prospects to maintain their working methods updated.
iOS 12.Four is now the one model of iOS that may be put in on iPhones and iPads, however builders and public beta testers can obtain iOS 13, an upcoming replace that is at present being beta examined.
https://www.macrumors.com/2019/07/31/apple-stops-signing-ios-12-3-1/
