Apple iOS 16.4 official version stops signature verification and cannot be downgraded after upgrading iOS 16.4.1
Thanks to CTOnews.com netizen Xiao Zhan for the clue delivery! CTOnews.com April 15, Apple has stopped signing the iOS 16.4 update. This means that iPhone users who have upgraded to iOS 16.4.1 update can no longer downgrade or revert to that firmware version.
Apple released an update of iOS / iPadOS 16.4 on March 28, mainly adding 21 emoticons to optimize car accident detection. CTOnews.com Note: the official update log indicates that this update also includes other enhancements, bug fixes and security updates for iPhone.
For more information about iOS / iPadOS 16.4 updates, you can visit the relevant reading links below.
Related readings:
"Apple iOS / iPadOS 16.4 official release: add 21 emoticons to optimize car accident detection"
