iPhones updated to iOS 26.5 can no longer be downgraded

Apple has stopped signing iOS 26.4.2, blocking iPhones updated to iOS 26.5 from downgrading.

Users who run into problems after updating can no longer roll back to the previous version for recovery.

The move reduces iPhone users’ options and flexibility when dealing with update-related issues.

The timing comes as Apple prepares for WWDC and the next iOS 27 cycle.