Apple recently rolled out the iOS 15.0.1 update and now the company has stopped signing code for the iOS 15 that was launched for the public on September 20. This means that Apple iPhone users with the new iOS update can no longer downgrade to an older build. So, if you are already using iOS 15.0.1 or have upgraded to iOS 15.1 beta version then you cannot downgrade, even if you want to.
Released last week, iOS 15.0.1 was focused on resolving bugs reported by several iPhone users after installing iOS 15. The update included bug fixes where few iPhone 13 users were unable to use Unlock with Apple Watch feature. Apart from this, the update also fixed a bug where the Settings app was incorrectly displaying an alert that the storage is full and Audio meditations could unexpectedly start a workout on Apple Watch for some Fitness+ subscribers.
The company regularly stops signing legacy codes whenever a new iOS update is launched as it allows to keep more devices on feature-rich versions and it also protects the users from cybercriminals that try to use newly discovered weak links
Although the company does not recommend downgrading to an older iOS version, iPhone users who jailbreak their devices often prefer this process. Users who face battery issues and any other bugs when they install a new iOS build update also often try to downgrade their operating system.
First unveiled in WWDC in June, iOS 15 marks a major version update introducing features like Live Text, Focus Mode, SharePlay, Virtual Look Up, redesigned Safari browser and other security updates. The update is only available to install in iPhone models launched after 2015 or above iPhone 6S. To install the latest version in your device you can go to Settings > General > Software Update.