Cannot Unlock Phone, Reaches 50% Then Get Message ' Couldn't Verify Device'

[Bullettime]

Hi,

I've search numerous threads.
Uninstalled and installed drivers.
Have installed MI PC Suite, latest addition, still not working.
Using stable version of MIUI that came with the phone.
I have asked for unlock permission and received it from Xiaomi along with the steps/exe file to do so.
i have turned find my device, checked my device on my MI account and on my phone. GPS on as well.

Desperately searching for an answer, please help me!

 

[quangtiens]

I have solved same trouble for my Mi Max as below:
1. Flash dev rom (I'm not sure you can unlock boot loader with stable rom)
2. Turned on deverloper options
3. Turned on Oem unlocking
4. Unlock boot loader