Hi
We have got the first stock firmware for the newest MK808B.
Here is the firmware download link:
https://www.dropbox.com/s/nbb2qsxs0aubcnx/geekbuying_update_mk808b_01.7z
Update method is the same as MK808,if you don’t know how to update, please check here
https://blog.geekbuying.com/index.php/2012/09/28/mk808-mini-pc-new-factory-firmware-release/
and here is some screenshot after you update: