Apple closes iOS 15.1 verification channel to prohibit users from downgrading

In order to retain users of the new version of the system, Apple will do the following every time. According to the latest news, Apple has closed the verification channel for the iOS 15.1 system, which means that users who have upgraded the iOS 15.1.1 system cannot downgrade to iOS 15.1 and earlier versions.

On November 18th, Apple released iOS 15.1.1 (version number 19B81). The focus of this repair is the call drop problem encountered by iPhone 13 and iPhone 12 users. At present, users can use the compatible iPhone and iPad. It can be obtained through OTA download on the model.

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According to Appleā€™s release notes, iOS 15.1.1 fixes the call drop problem on iPhone 12 and iPhone 13, as well as regular bug fixes. Apple did not provide specific release notes for iPadOS 15.1.1. Apple’s previous version, iOS 15.1 build 19B74, was released on October 25.

This version added support for SharePlay and vaccine card input in Apple Wallet. This is also the first bug-fix version after the update was released. Many users called after seeing the update of this version of Apple. Before, they always felt that sometimes the call was dropped because of nearby signal problems. Unexpectedly, it was a software problem. It showed that it could not be dialed after the connection was dropped, but in fact, it can, in short, It’s dropped.

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