Xiaomi Box S 3rd Gen: Budget Player w/Dual-boot CE + DV FEL & Google TV

with the Reboot to CoreELEC app, choose first reboot.

Indeed. That must be used again after every firmware update, not only for this Mi.

how did you get this? it’s $70-$80 on Ali for me.

could you share where you get it? I can’t find price that low anywhere.

From time to time there is a similar price in Poland, with a discount coupon.

I:ve been testing with modified EDIDs.

It partially works since CoreELEC shows DV options. However it doesn:t change to HDR when playing DV content, just send SDR to TV when playing.SDR or DV. Only sends HDR when content is HDR but not DV