| Error Code | Description | How to Fix | | :--- | :--- | :--- | | | "Couldn't verify, please wait..." or "Device identification failed." | This often happens immediately after linking the account. Wait the full waiting period (72/168 hours) without rebinding. It can also indicate a modified system or non-official ROM. | | 20091 | Account not bound to device. | You did not bind the account in Step 1.3. Go to Developer Options -> Mi Unlock Status and re-link it. Wait the necessary time before trying again. | | 401 | Parameters expired. | Usually a server-side session error. Log out of the Mi Unlock Tool, close it, re-open, log in again, and retry the connection. | | 86012 | Device is locked by another account. | Wait a few days. Trying repeatedly can temporarily block your IP. Wait 48 to 72 hours before attempting to bind the account again. | | 20034 | The device was unlocked before. | The device was previously unlocked by a different Mi Account (e.g., it was a demo unit). You cannot unlock it again with a different account. |
: In some regions, unlocking your bootloader may void your device warranty. Step 1: Prepare Your Tools and Hardware How to unlock Bootloader in XIAOMI Mi 8 SE with...
Use your phone normally until the timer expires, then repeat Steps 3 and 4. Step 5: Finalizing the Unlock | Error Code | Description | How to
Ensure you have a Mi Account that has been active for more than 30 days . | | 20091 | Account not bound to device
Unlocking the bootloader of your is the essential first step toward flashing custom ROMs, installing custom recoveries like TWRP, and gaining root access . Xiaomi enforces a official bootloader unlocking process that requires their proprietary software tool and a waiting period.
Unlocking the bootloader on a Xiaomi Mi 8 SE is a standard procedure for enthusiasts looking to install custom ROMs (like Xiaomi.eu or LineageOS) or gain root access