https://www.imore.com/apple-no-longer-signing-ios-1541-iphone
Apple is no longer signing iOS 15.4.1 for the iPhone | iMore
May 23, 2022 - After releasing iOS 15.5 for the iPhone, Apple is now blocking downgrades to iOS 15.4.1.
ios 15 4 1
https://www.notebookcheck.net/iPhone-users-complain-about-several-issues-after-iOS-15-4-1-update.612646.0.html
iPhone users complain about several issues after iOS 15.4.1 update - Notebookcheck News
Even after the update to iOS 15.4.1, some iPhone owners have unfortunately suffered from a few annoying problems with the synchronization of iMessages as well...
ios 15 4 1
https://appleinsider.com/articles/22/03/31/apple-releases-ios-1541-ipados-1541-tvos-1541-with-bug-fixes-and-business-essentials
Apple releases iOS 15.4.1, iPadOS 15.4.1, tvOS 15.4.1, watchOS 8.5.1 with bug fixes and Business...
Apple has released iOS 15.4.1, iPadOS 15.4.1, watchOS 8.5.1, and tvOS 15.4.1 with bug fixes, security updates, and the release of the Apple Business Essentials...
ios 15 4 1