Apple is no longer signing iOS 18.5, which means iPhone users who have upgraded to iOS 18.6 can no longer downgrade to the prior version of iOS. iOS 18.6 was released a little over a week ago.

It’s been just over a week since Apple released iOS 18.6. Since the iPhone software update has shipped without issue, Apple has stopped signing the older iOS 18.5 software version. Apple stops signing ...

Apple has stopped signing iOS 18.6.2, which means that if you've upgraded to iOS 26, you're no longer able to downgrade to a version of iOS 18. Apple released iOS 26 a week ago. When software is ...