Apple officially closed the iOS 18.4.1 downgrade channel, and iPhone users need to be cautious when upgrading.

Apple recently announced that it has officially closed the signature verification service of iOS 18.4.1 version one week after the release of the iOS 18.5 system. This means that all iPhone users who have been upgraded to the latest version of iOS 18.5 will no longer be able to retreat to the previous iOS 18.4.1 version through official channels.

It is understood that iOS 18.4.1 version focuses on fixing key errors and improving system security, especially solving the problem that wireless CarPlay cannot be connected in a few vehicles. This improvement is crucial to user experience.

Apple’s security update mechanism requires that the installation of any iOS version must first be verified by the server. Once the verification channel is closed, users can no longer install the old version of the system without official authentication. This initiative is part of Apple’s long-term security strategy, which aims to ensure that user devices are running system versions containing the latest security patches.

Apple officially closed the iOS 18.4.1 downgrade channel, and iPhone users need to be cautious when upgrading.

Apple officially closed the iOS 18.4.1 downgrade channel, and iPhone users need to be cautious when upgrading.

Apple’s consistent practice is to stop the signature verification service for the old version about a week after the release of the new system version. This action once again reflects Apple’s great importance to user data security and system stability.

At the same time, Apple also announced the termination of the signature verification of iPadOS version 17.7.6. Previously, due to the stability problems of iPadOS version 17.7.7, Apple has urgently pushed iPadOS version 17.7.8 as a countermeasure to ensure that iPad users’ devices can run smoothly.