So, I had the stupid idea of buying a XIAOMI MI BOX on ALIEXPRESS (since i live in brazil and there's no other way of buying it here) but by mistake I bought the CHINESE version. Is there anyway I can root it and install android TV with NETFLIX ad stuff? Or any other solution to this HUGE problem I have?
Try this tablet version of Netflix. It worked as 1080p on the Razer forge TV which is an official Android TV without netflix. https://insider.razerzone.com/index.php?threads/test-patched-netflix-apk-tablet-with-probably-1080p-output.16224/ will need airmouse. Thankfully someone figured out how to get proper Android TV netflix on the forge
Also try the apkmirror version hopefully your build.prop will still look similar to the us mibox. http://www.apkmirror.com/apk/netflix-inc/netflix-for-android-tv/
The main issue is your box is likely lacking a widevine L1 certificate. You may not get above 480p.