Following the release of iOS 12.4.1 on August 26, Apple has stopped signing iOS 12.4, the previous variation of iOS that was readily available to consumers.
iPhone, iPad, and iPod touch owners who have actually upgraded to iOS 12.4.1 will no longer be able to downgrade to iOS 12.4.
Apple routinely stops finalizing older variations of software updates after new releases come out in order to motivate consumers to keep their os up to date, however iOS 12.4.1 was released since iOS 12.4 had a significant vulnerability.
The vulnerability permitted hackers to develop a jailbreak for iOS 12.4 and left gadgets vulnerable to hacking attempts. Apple repaired the bug in iOS 12.4.1, and the iOS 12.4 jailbreak will not work after updating.
iOS 12.4.1 is now the only variation of iOS that can be installed on iPhones and iPads, however designers and public beta testers can download iOS 13, an upcoming update that’s presently being beta tested and is set to be launched next week.