As of mid-2026, Xiaomi has officially shut down its global bootloader unlock service and the associated permission system for newer models. However, for legacy devices like the Mi 8 SE (released 2018), the old method may still work if you have an older MIUI version installed. If you are on a newer "HyperOS" community build, unlocking may be impossible without authorized Mi engineer credentials. This guide assumes you are running MIUI 12 or older .
https://www.xiaomi.com/service/unlock (click “Unlock now”).