The old firmware has a usb malfunctioning bug when you try to put the unit into kernel upgrade mode, in order to fix this you have to:


Connect usb to nanocom evolution without SD card and wait until contents of nc_firmware drive is shown.

Copy and overwrite ncset.app into nc_firmware drive and restart unit and try kernel mode setting.

NOTE: After the unit is updated with new firmware the kernel upgrade mode will working properly.