Apple closes iOS 15.0.2 system verification channel, and cannot downgrade after upgrading to iOS 15.1

On November 3, after releasing the official version of iOS 15.1 in late October, Apple stopped verifying iOS 15.0.2 today. This means that users who have updated to iOS 15.1 can no longer downgrade to iOS 15.0.2.

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iOS 15.1 adds simulcast sharing and the ability to shoot ProRes video on iPhone 13 Pro and iPhone 13 Pro Max. At the same time, a verifiable COVID-19 vaccination card is introduced in Apple Wallet.

Apple usually stops verifying older versions of iOS within a few weeks after pushing the official version update. For some users who have updated to the latest iOS system, when they encounter major bugs, downgrading is sometimes very effective. This is also the reason why Apple will wait for a while before closing the verification channel for older iOS systems.

In addition, Apple iOS 15.0.2 fixes issues such as AirTag may not be displayed in the "Items" tab of "Find", and restoring or updating iPhone 13 models using "Finder" or iTunes may fail.