So, the previous post I've written from the phone, now I will try to provide more info.
The device is a kindle 3 Wifi only.
Yesterday, after flashing the bootloader found here :
https://www.mobileread.com/forums/sho....php?p=2217459, when performing the
k3flasher ./mx35to2_mmc.bin info command the device's serial number and Wifi mac are all displaying '???' instead of the real serial and mac.
Was this area overwritten ?
I've used the k3flasher program uboot parameter for it.
Do you have an advice what should I do ? Or the device is permanently bricked ? (I hope not)