Hey another unlogged new feature! "Amazon Device Simple Setup".
You can now use the Kindle app to sign into your Amazon account over bluetooth.
https://reddit.com/r/kindle/comments..._simple_setup/
How it works: What it does it let the user take their 10th Generation or later Kindle into a special Kindle app search mode during setup, enable Bluetooth and Location Services on the device with the Kindle app and also enabling the Simple Setup feature on the app.
Wait and it will say it found a Kindle E-Reader. You then choose to sign into your Amazon account, and choose your WiFi network (you can also choose from ones saved to your Amazon account that are in range). Select that and bam! It's almost instantly done and you're signed into Amazon on a Kindle E-Reader!
(my Reddit post has pics)
So far this hasn't been also added to the Fire tablet Kindle app... yet.