If you receive the version with official release and only chinese and english language, you need to flash official twrp before flash EU version 6.12.8 Rom.
After that, you flash twrp rc2 eu version and you'll can install xposed and root if you want.
For the Finnish, it's a community who translate language. It's possible that there is shake.
For your bootloader i can't help you because i don't know how it was unlock.
Anyway i guess it was unlock by the seller with miunlock.
I bought mine here.
https://www.cect-shop.com/de/xiaomi-mi-mix-6-256gb-exclusive-edition-6-4-zoll-fhd-6gb-ram-256gb-ufs2-0-rom-64-bit-qualcomm-snapdragon-821-2-35ghz.html
It is at the same price but you'll receive immediately ;)
Liaow refund you very quickly.
In fact, your mi mix must suggest you the update to 8.0.10.0 when you go to "update" app.
Update it.
If don't obtain the update download it.
http://bigota.d.miui.com/V8.0.10.0.MAHCNDI/miui_MIMIX_V8.0.10.0.MAHCNDI_7344267342_6.0.zip
and install it with TWRP or with the "update" app (after...
You need official TWRP to flash the 6.12.1 EU version.
After flash the eu version, you need to install the TWRP RC2 because it's not the same recovery between the official Rom and Dev Rom.
The 6.12.1 Rom is base on the Dev Rom.
Result the touchscreen don't work with official TWRP and Eu Rom...
GREAT NEWS for Mi Mix 6/256Go users.
Flash this TWRP version and it work like a charm on the 6.12.1 EU Rom.
https://build.nethunter.com/test-builds/twrp/xiaomi/twrp-3.0.2-0-rc2-eu-lithium.img
Thx XDA DEV.
Nice question and i don't know.
Try the 2 versions.
The only thing what i know is, i bought the version with stock chinese firmware and rom.
I will try the XDA tuto this afternoon and i come back to push result here and post a process tuto.
Nobody read the informations in XDA forum posts ?
You can find the device page here:
For official stock/dev firmware: http://teamw.in/devices/xiaomimimix.html
For EU (International) firmware only: https://build.nethunter.com/test-bui...eu-lithium.img
(touchscreen will not respond if not...