The fact that Apple may soon stop signing iOS 10.1 jailbreak - it's probably going to happen by the end of this week. That means the company will close the only "window" through which all can "roll back" with iOS 10.1 jailbreak
How to perform the procedure downgrade?
- First, perform a backup of iOS-devices. In any case, better to make a backup and iCloud, and using iTunes. So it will be safer.
- Then load the firmware under the number iOS 10.1 jailbreak. IPSW files are already available on the Web - for example, here.
- Connect your iPhone to your computer and open iTunes (on Windows or OS X). Select the device and holding down the Option (on OS X) or Shift (on Windows), click "Restore."
Select the downloaded firmware and run the restore. After the download is complete, you can either set up as a new device or restore it from a backup.