Wired
With the release of iOS 15.2.1 earlier this month, it was revealed that Apple has stopped issuing signatures to iOS 15.2. This makes it no longer possible to downgrade from iOS 15.2.1.
iOS 15.2 released in early December
iOS 15.2 will be open to the public on December 13, 2021, with Apple Music’s Voice plan, Settings app privacy report, Message safety feature for children, Digital Heritage Program, and more. have become.
A month later, on January 12, iOS 15.2.1 was released with a fix for CarPlay bugs and HomeKit vulnerabilities.
Due to the suspension of signature issuance to iOS 15.2, rewinding from iOS 15.2.1 using the iTunes restore function is no longer possible.
Source: 9to5Mac
(lexi)
Source: iPhone Mania