Apple stops signing iOS 15.1.1, blocking downgrade from iOS 15.2
December 21, 2021
Following the release of iOS 15.2 to all users last week, Apple today stopped signing iOS 15.1.1 for iPhone 13 models and iOS 15.1 for older iPhone models. This means that users who updated their devices to iOS 15.2 can no longer downgrade to iOS 15.1.1 or iOS 15.1.
Back in November, Apple had stopped signing iOS 15.1 for iPhone 13 models as those devices received the iOS 15.1.1 update to fix a…