We just get the stock firmware for Tronsmart Prometheus Amlogic m6 dual core tv box, here is the firmware download link:
here is the firmware update instruction:
1 Download firmware from the above link;
2 Decompress the file, and you will get 4 files
4 Power on the Android TV Box (connect the AD adapter with device), wait for blue Led flash 3 times then release reset key.
5 System will automatically upgrade.( Make sure power is not interrupted during the upgrading process.
6 After 3-5 mins, device will be reboot after upgrading .(Check the software version in setting-> about media player. You will see it).
We have tested with this method, and everything is right, here is the screenshot after we upgrade successful:
Enjoy the Firmware, any suggestions, feel free to ask.
Update 4th Jan, we take a video for how to update firmware, check here: