Attempting to flash firmware intended for a different hardware revision will render the radio inoperable ("bricked").
With the radio off, long-press the LW/MW button to toggle LW on or off. xhdata d-808 firmware update
The D-808 does have updatable firmware, but it is not a routine process. XHDATA has released only a handful of updates over the years to fix specific manufacturing batch issues. Attempting to flash firmware intended for a different