How does that work? Does a factory reset require access to an Amazon server? Did an update break the factory reset mechanism?
I have some experience doing this with this on an older keyboard Kindle and Calibre, and haven't really kept up with the current state of jailbreaking on newer models, but at the time, it wasn't possible. Although a quick search says that you can still deDRM books using the desktop app[0].
akpa1•1h ago