Apple closed the signatures of iOS 10.1 and iOS 10.1.1
After the release of iOS 10.2, Apple closed the signatures of iOS 10.1 and 10.1.1, making it impossible to downgrade to previous versions.
As usual, after the release of an update, Apple has blocked the ability to downgrade to the previous version of iOS. This time, it was at iOS 10.1 and iOS 10.1.1. Usually the closure of the signatures has negative effects on those who is usually carry out the Jailbreak, but on the two versions that have just closed, it has never been possible to do this.
Link to the original article: Apple closes the signatures of iOS 10.1 and iOS 10.1.1