Apple stopped signing iOS 17.3 today, preventing users who have upgraded from downgrading to that version.iOS 17.3 is no longer signed following the February 8 release of iOS 17.3.1, an update that added fixes for text-related bugs. Apple typically prevents users from installing older versions of iOS to encourage customers to keep their operating system up to date and prevent downgrades to older, less secure iPhone operating system versions.
iOS 17.3.1 is now the only publicly released version of iOS, but Apple is also beta testing iOS 17.4.The official version of iOS 17.4 will be released in March this year, bringing features such as application sideloading (EU only), podcast improvements, new Emoji and other features.
This version will allow iPhone and iPad users to download and install apps outside of the AppStore through other app markets.
Apple reminds that this will bring new risks to Apple users and their devices. Apple cannot eliminate these risks and can only reduce risks to a limited extent.
Apple CEO Cook also bluntly stated that if you want to sideload apps, you can buy an Android phone.