I had to reset my Alcatel Fierce XL W10 (15063.332) phone and after reinstalling the Kindle app couldn't get it to authorize. I tried numerous one-time passwords without success. Amazon chat told me the app is no longer supported on W10 mobile even though it still works on my other Alcatel phone (Idol 4S; 15063.332). I also noticed it's no longer advertised on the Kindle apps page.
I hope I'm wrong, but if you like the Kindle app, don't uninstall it or reset the phone!
I hope I'm wrong, but if you like the Kindle app, don't uninstall it or reset the phone!