I just got my new black Kindle 4NT and I'm having trouble installing Duokan.
I downloaded the K4NT version from
this post
I connected with USB my device.
I then copied to the root folder the DK_system folder and then diagnostic_logs, data.tar.gz and ENABLE_DIAGS from the folder K4._4.1.0 (there is also another folder in the zip, called K4._4.0.0. to 4.0.1. , but my device has the 4.1 (1615370055 FW).
I restarted the device and I got into diagnostics. I then went to exit-reboot-disable diags. I choose disable diagnostics and then when installation started I get this:
Device is unknown type
ERROR device is not kindle 3/4
Then the Kindle restarts regularly with the official OS.
Any ideas about that?