As we all know Global beta Rom update is out OREO BUILD 8.0 Last build MIUI 8.1.18 and for that we need unlocked bootloader with Global developer rom installed in our devices . For this we need your Mi account credentials ,Mi Mix 2 & data cable fast stable internet ,PC /Lappy n some patience .
Before proceeing further backup all your stable images / data / documents and apps (contacts & messsages are by default safe with google /Mi )
Now first visit on your PC
Get Mi unlock tool, install it into your pc , through driver check fix driver issues and your ready to roll.
Get this Official OREO Fastboot image (2.1 gb approx ) DIRECT LINK dOWNLOAD
USE winrar and unrar fastboot image to a new folder and name It XM and remember its path
Download Official image flashing tool (Size: 46 MB) install it in your pc and wait read further
how to use flashing fastboot image is below
Now part II of our unlocking on phone:
Phone go to settings Additional settngs Developer options (7 click on MIUI version in About Phone will enable Developer options) OEM Unlocking (check) Mi Device Unlock (Here is your locked sign)
Now try to bind your mi account with the device if Error 10008 & (&&%%^&*(U ) etc your seeing .
Just got to mi App store get plexVPN register with your email and select china server and enable it when it shows connected
Now Go back to mi device unlock options and you will be shows account linked
Its time to Switch off your phone and Long press Volume Down (-) & power key to get into fastboot state
On PC start your Mi unlock app enter your MI ID & password and app asks for connect your device connect it and wait for unlocking ...
after authorising your detials it will show unlocked and device will show reboot optioons.
if everything goes as directed your device will be unlocked .now its time to flash global beta Rom build 8.1.18, via Fastboot .
Refer here for offical links
Open Image Flashing tool and provide it your path of unrar fastboot image and connect with your fastboot mode device to pc, Refresh and you will see device serial no,
Carefully check * clean all option
and selct on FLash .
your all done wait for 5-10 mins n device will reboot with unlocked Global developer Rom .
***** all data and links from my personal uses on my mix 2 and Mi forum.
if device team feels it should be kept sticky it would be much better .
[ROM] Unlocking MIX 2 for global developer rom *bootloader Unlocking* (Beta Oreo LINK UPDATED)