Originally Posted by ixtab
I vouch for the "test" key. Every currently known application (to me) could have been signed using that identity, and it would work on all devices.
Except that member spl0it
has reported that when deregistering a kindle, it can detect the "test" key and delete the developer keystore. I am not aware of any reports of that happening with other developer keys: https://www.mobileread.com/forums/sho...d.php?t=185444
Hopefully, using the "test" key that you suggest does not cause the problem that spl0it mentioned.