Apple has stopped signing iOS 18.3. This means users can no longer downgrade to this version. The change comes a week after the release of iOS 18.3.1, a minor update focused on bug fixes and security improvements. Anyone who has upgraded to iOS 18.3.1 cannot revert to iOS 18.3.
End of iOS 18.3 signing : Why Does Apple Do This?
When Apple releases a new iOS version, users have a short time to downgrade if needed. After a few days or weeks, Apple revokes the digital signature. This prevents users from installing older versions. The goal is to ensure all devices run the latest and most secure software.
Stopping old versions helps prevent jailbreaking. Jailbreaking allows users to install third-party apps and modify iOS. Apple blocks older versions to close security loopholes that hackers might exploit.
What’s New in iOS 18.3.1?
iOS 18.3.1 is a small update with security fixes. Apple says it patches critical vulnerabilities that attackers have used against specific users. One key fix involves a security flaw in accessibility settings. This flaw could disable Restricted USB Mode on a locked device.
Restricted USB Mode protects against unauthorized access via physical connections. The flaw required physical access to exploit. Apple confirmed that attackers had used it in targeted cases. The update ensures this vulnerability is closed.
Is Jailbreaking Still Possible?
For years, jailbreakers have used older iOS versions to install unauthorized apps. However, Apple made sideloading possible in iOS 17.4 under certain conditions. This has reduced the need for jailbreaking.
Even with sideloading, Apple continues blocking old versions. This prevents security risks and keeps devices running the latest software. Allowing downgrades could leave devices exposed to known vulnerabilities.
What Should You Do?
If you haven’t updated to iOS 18.3.1 yet, do it soon. The update includes important security fixes. Since downgrading is no longer an option, staying updated is the best way to keep your device safe.
So, Apple’s decision to stop signing iOS 18.3 ensures better security. It also prevents fragmentation across devices. Keeping your iPhone or iPad on the latest iOS version helps protect your data and improves performance.
