iPhone users no longer able to downgrade to iOS 26.4

Apple has stopped signing iOS 26.4 after releasing iOS 26.4.1, so iPhone users can no longer downgrade to the older build.

Devices updated to iOS 26.4.1 cannot roll back to 26.4, which reduces recovery options if issues arise.

The move reflects Apple’s iOS signing policy, which pushes users toward the latest security and bug-fix updates.

This change can affect troubleshooting and device management for iPhone owners.