Why Xiaomi bootloader won’t unlock: all the reasons and what to do in 2026

You're trying to unlock a bootloader on Xiaomi, but Mi Unlock Tool is bug after bug, and the unlock percentage is still there? This problem is familiar to thousands of users, and its causes are far from obvious. In 2026, Xiaomi tightened its security policy by adding new restrictions to unlock the bootloader, from region-based binding to device history check. In this article, we'll look at all the possible reasons for blocking the bootloader, including hidden restrictions that are not mentioned in the official instructions, and give working solutions for each of them.

It is important to understand: unlock the bootloader on Xiaomi, Redmi or POCO — It's not just a technical procedure, it's a whole system of manufacturer-side checks, and even if you follow the instructions, the company's servers can reject the request for a dozen reasons -- for version inconsistency. MIUI We've analyzed hundreds of cases from forums before we suspected that the device was resold. 4PDA, XDA Developers and the official Mi Community community to highlight 12 key reasons why a bootloader may not unlock and what to do about it.

If you've tried unlocking a bootloader before and you've got an error like Couldn't unlock, Current account is different from the one bound to the device or Device is not supported, don't rush to hand over your phone to the service. In 90% of cases, you can solve the problem yourself, knowing the exact cause. Let's start with the most common mistakes and move on to rare but critical nuances.

1. The device is not linked to the Mi Account (Error 86006)

The most common reason for failure to unlock is that the device is not tied to the Mi Account, a step many users miss or misstep because they think it’s easy to log in to a phone account. Xiaomi actually requires full synchronization of the device with the servers, which includes:

• 📱 Sign in to Mi Account in phone settings (Settings) → Xiaomi account).
• ☁️ Activation of data synchronization (contacts, notes, backups).
• 🔗 Proof of ownership through SMS email.
• ⏳ Wait 72–168 hours (3–7 days) after tethering before attempting to unlock.

If you try to unlock the bootloader immediately after you have linked your account, Xiaomi’s server will give you an error of 86006 (“The device is not associated with this account”).This is not a bug, but a planned delay to protect against theft. Even if you bought a new phone and immediately linked it to your account, wait at least 3 days before you first try to unlock.

⚠️ Note: If you bought the phone with your hands and the previous owner did not untie it from your account, unlocking will be impossible.In this case, you need a hard reset and a new binding, but even this does not guarantee success - Xiaomi can block the device as "suspicious".

2. Version inconsistency MIUI Xiaomi requirements

Xiaomi regularly updates the rules of unlocking, and some versions MIUI They can be locked to unlock:

• 📱 Older versions (e.g., older versions, MIUI 12 and below on new devices).
• 🔒 Regional firmware (e.g, MIUI EU custom-assembly).
• 🚫 Beta versions (MIUI Beta or Developer ROM expired).
• 🌍 Firmware for other regions (for example, Chinese firmware on a global device).

Check the compatibility of your version MIUI with unlock, go to Settings → The phone. → Version. MIUI. If it says something like V12.5.3.0.RKBCNXM (where CN — China), and your account is linked to a global region, the server will reject the request:

1. Update your firmware to the latest stable global version via Settings → Updating the system.
2. If the update is not available, download the official Fastboot ROM From the Mi Downloads website and run it through the Mi Flash Tool.
3. After the firmware re-link the account and wait 3-7 days.

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If after firmware official global version unlock still does not work, try to temporarily install MIUI China Stable (power users only!) Sometimes Xiaomi servers respond better to native firmware, even if the device is global.

Error "Device is not supported" (unsupported device)

This error occurs when the Mi Unlock Tool does not recognize your phone model as compatible with unlocking.

• 🆕 A new model (e.g. Xiaomi 14 or Redmi Note 13 Pro)+ in the first months after the release).
• 🔧 Hardware modification (replacement of motherboard, IMEI).
• 🌐 Regional restrictions (e.g., India device not unlocked in Europe).
• 📵 Device in blacklist (stolen, locked on the device) IMEI).

To check if your model is supported, compare its code name with the list on the official website.+ 5G It's codenamed ruby. You can recognize it:

adb shell getprop ro.product.device

If your device is not supported, there are two options:

1. Official way: to ask Xiaomi to add the model to the list of supported (inefficient).
2. Unofficial way: use alternative unlocking methods (e.g., through the use of a EDL exploits, but this requires deep knowledge and risks building a phone.

⚠️ Note: If your device was purchased in China and has firmware MIUI CN, You will need a Chinese Mi Account with a linked number to unlock. +Without this, the server will reject the request even on supported models.

4. Xiaomi server errors (500, 404, timeout)

Sometimes the problem isn't with your phone or your account, but with Xiaomi's servers running in a messy way, and it's like:

• 🔄 Infinite download in Mi Unlock Tool (the circle is spinning, but nothing happens).
• 🚫 Errors 500, 404 or timeout.
• 📉 Suddenly shutting down the program without explaining the reasons.

Server problems most often occur:

• 🕒 During peak hours (Chinese time evening, when most users try to unlock devices).
• 🔄 When you update Mi Unlock Tool or Xiaomi server infrastructure.
• 🌍 When connecting through VPN Proxy (the server can block) IP as "suspicious").

What to do:

Turn it off. VPN/proxy|Reboot the router and PC|Try another internet cable (not Wi-Fi)|Use the official Mi Unlock Tool (not modified)|Try to connect at another time of the day.-->

If the error persists, check the status of Xiaomi servers on sites like Downdetector. If the problem is massive, you just have to wait.

5.Mi Account is blocked or restricted

Even if your Mi Account is active, it may have hidden restrictions that prevent you from unlocking.

• 🔐 New account (less than 30 days from the date of registration).
• 🚨 The account was blocked for suspicious activity (many devices, frequent changes) IP).
• 📵 Account not confirmed by SMS/email.
• 🌐 The account is linked to another region (e.g., a Chinese account for a global device).

To check the status of the account:

1. Go to account.xiaomi.com.
2. In the Devices section, make sure your phone shows up as "connected."
3. In the Security Settings, check if there are any block alerts.

If your account is blocked, try:

• 📧 Confirm email and phone.
• 🔄 Change password and enable two-factor authentication.
• 🕒 Wait 7-14 days (if the lock is temporary).
• 📩 Write in support of Xiaomi with a request to unblock the account (specify) IMEI device).

⚠️ Note: If you used one Mi Account to unlock multiple devices in a short period of time, Xiaomi may consider this as “farming” and permanently block the ability to unlock.

6.Driver problems or Mi Unlock Tool

Often, users are not experiencing errors because of Xiaomi servers, but because of Mi Unlock Tool or drivers.

• 🖥️ The program does not see the connected phone.
• 🔌 The phone is defined as Qualcomm. HS-USB QDLoader 9008 (mode) EDL).
• 🚫 Mistakes. 0x80070005 or 0x80004005 (access problems).

To fix this:

Download the latest version of Mi Unlock Tool from the official website|Install Qualcomm drivers (for mode) EDL)|Disable the antivirus (it can block the program)|Launch Mi Unlock Tool on behalf of the administrator|Check that the device manager displays the phone as “Android Bootloader Interface"-->

If the phone is defined as Qualcomm HS-USB QDLoader 9008, which means it went into emergency mode EDL. In this case:

1. Turn the phone off the PC.
2. Press the power button for 20-30 seconds to force it to turn off.
3. Reconnect and try to run the Mi Unlock Tool again.

If the problem persists, try using a different version of the Mi Unlock Tool (e.g. 3.5.1128.45 instead of the last one).

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If the Mi Unlock Tool gives you a "Couldn't receive device info" error, it's likely the driver problem: Remove all old Xiaomi drivers through Device Manager and install them again from the official website.

7. Alternative Unlocking Methods (if nothing helps)

If all the official methods are exhausted and the bootloader still doesn't unlock, there are still informal methods, which are risky and can lead to a device to be broken, but sometimes it's the only way out.

• 🔓 EDL-Unlocking (through Emergency Download Mode) Requires an authorized Qualcomm account or paid services like DC Phoenix.
• 🛠️ Exploits (for example, for Xiaomi) EU ROM). It only works on older models.
• 📱 Fastboot bypass (for some devices on MediaTek).
• 🔧 Contacting the Service Center (official or unofficial).

The most reliable informal method — EDL-Unlocking, but it requires:

1. Paid access to tools like DC Phoenix or UFi Box.
2. Knowing the keys for your model (you can buy them or find them on forums).
3. Ability to work with QFil or Mi Flash Pro.

⚠️ Note: Using informal unlocking methods may result in loss of warranty, lockdown IMEI If you're not sure about your skills, you should call the professionals.

FAQ: Frequent questions about unlocking Xiaomi bootloader