You must jailbreak to gain command-line access (KUAL+kterm, or USBNetwork), then do stuff similar to this guide for the KPW:
https://www.mobileread.com/forums/sho...d.php?t=193260
the reginfo file seems to be the correct file going back a number of versions (at least since Kindle Touch versions) so it *should* work for the K4NT but no promises. WiFi will remove the false registration but I suppose by then you can register for real.