Apple released iOS 14 last week, and as is traditional, Apple has now stopped signing iOS 13.7, making downgrading to that version of iOS no longer possible.
iOS 13.7 was a major update that includes a new Exposure Notifications System that doesn’t require an app to be downloaded to turn the feature on.
iOS 14 was Apple’s release of its latest and greatest mobile operating system for iPhone and iPad devices. As of Monday, iOS 14 was installed on approximately 26% of active iPhone, iPad, and iPod touch devices.
Apple is known to stop signing older versions of operating systems after it releases a public update, as part of an effort to encourage users to keep their devices’ operating systems up to date.