What “Unlocked” Means on Xiaomi: Unlocked bootloader and Its Consequences

If you’ve ever seen a Xiaomi smartphone in a secondary market or studied topical forums, you’ve probably seen the reference to “Unlocked” status, which literally translates to “unlocked,” but in the context of Xiaomi devices (and other Android brands), it has a specific technical meaning: the state of the bootloader, a low-level software that runs before the operating system is booted.

By default, all Xiaomi smartphones come with a Locked Bootloader.This is a security measure that protects the device from unauthorized firmware changes, custom recaps or root rights. However, many users will deliberately unlock the bootloader to get advanced customization options. In this article, we will discuss in detail what Unlocked status is on Xiaomi, how to check what pros and cons it carries, and how it differs from the concept of “unlocked for all operators” (which is often confused with unlocking the bootloader).

What is an unlocked bootloader on Xiaomi

A bootloader is a program that starts when you turn on your smartphone before you start Android, and its main task is to check the integrity of the system and hand over control to the operating system kernel. On Xiaomi devices (as on most Android smartphones), the bootloader is blocked by default.

• 🔒 It is not possible to install custom Recovery (for example, TWRP).
• 🔒 Unofficial (custom) versions of Android are prohibited.
• 🔒 It is impossible to obtain root rights without circumventing protection.
• 🔒 The system checks the firmware digital signature before downloading.

When the bootloader is unlocked (Unlocked), these restrictions are removed.

• 🛠️ Install alternative firmware (e.g. LineageOS, Pixel Experience).
• 🔧 Modify system files (including removing embedded Xiaomi apps).
• 🔓 Get root access for deep device configuration.
• 🔄 Restore the device through custom recavery if official methods do not work.

Unlocking the bootloader, however, is not only a new opportunity, it is also a risk: For example, some banking applications (such as Sberbank Online or Tinkoff) may refuse to work on devices with the bootloader unlocked due to a potential security threat, and Xiaomi officially warns that unlocking will void the warranty.

How to check if the bootloader is unlocked on Xiaomi

There are several ways to determine the status of the bootloader, the most reliable of which do not require the installation of additional applications and work even on non-rooted devices.

Method 1: Through Fastboot Mode

This is the most versatile method that works on all Xiaomi models (including Redmi, POCO, Black Shark).

1. Turn off your smartphone.
2. Press the Loudness Down + Power buttons and hold them for 5-10 seconds until the Fastboot logo appears.
3. Connect the device to the computer through USB-cable.
4. On your computer, open the command line (Win + R → enter cmd) and execute the command: fastboot oem device-info

In the output, find the line Device unlocked: true. If there is one, the bootloader is unlocked. If false, locked.

Method 2: Through the Developer Settings

On some MIUI firmware, the status of the bootloader is displayed in the menu for developers:

1. Activate Developer Mode: Go to Settings → About Phone and click on MIUI Version 7 times.
2. Return to the main settings menu, open Additional settings → For developers.
3. Scroll down and find Bootloader status.

If there is no item, use the method with Fastboot.

Method 3: Through Applications (for rooted devices)

If you already have root rights on your device, you can use apps like Bootloader Status Check or Root Checker, which will show the status of the bootloader in one click, but this method is not suitable for most users, since it requires prior unlocking.

⚠️ Note: Some sellers in the secondary market may claim that the device is “unlocked”, meaning unlocked under all operators (unlocked). SIM). It's not the same as an unlocked bootloader, so please tell me what type of unlock you're talking about.

Distinguishing Unlocked Bootloader from Unlocked SIM

These are two completely different concepts that are often confused.

For example, if you bought Xiaomi in China and it does not work with the Russian market. SIM-Cards, you need to unlock. SIM, It's not a bootloader. And if you want to install Google Camera or LineageOS, you'll need to unlock the bootloader.

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On some models (e.g. Redmi Note 10 Pro), unlocking the SIM may require an official code from Xiaomi, which is issued after payment.

Pros and cons of unlocked bootloader on Xiaomi

The decision to unlock the bootloader must be made conscious, and below are the key advantages and disadvantages that will help you weigh the pros and cons.

Advantages

• 🚀 Custom firmware: The ability to install Pixel Experience, LineageOS or other firmware with pure Android without shell MIUI.
• 🔧 Root access: Full control of the system, including removing embedded applications (bloatware), changing system fonts, setting up the kernel.
• 🔄 Recovery after failures: Castomic Recaveri (TWRP) Allows you to restore backups even if the system is not booting.
• 📱 Extending the life of the device: On older models (for example, Redmi) 4X or Mi A1) Custom firmware can give an updated Android when official support is terminated.

Deficiencies

• 🛡️ Loss of warranty: Xiaomi officially says unlocking the bootloader will void warranty.
• 💳 Problems with banking applications: Many banks (including Sberbank, VTB, Tinkoff) block the work of their applications on devices with an unlocked bootloader due to the risk of hacking.
• 🔓 Security vulnerabilities: Unlocked bootloader makes it easier for attackers to install malware.
• 🔄 Risk of “bricking”: Wrong firmware can turn a smartphone into a “brick” (inoperable device).
• 📱 Problems with OTA-Updates: After Unblocking, Official Updates MIUI They may not be installed or work properly.

⚠️ Note: Some functions do not work on devices with unlocked bootloader MIUI, for example: 🔐 Find Device (search for the device when lost), 📊 Mi Cloud (Data Synchronization), 🔒 Second Space: These features are tied to the original firmware and can be disabled after modifications.

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Unlocking the bootloader is irreversible: you can’t return the status of “Locked” without an official service center. Even if you block the bootloader again through the fastboot oem lock, Xiaomi can determine that it has previously been unlocked and refuse warranty service.

How to officially unlock the bootloader on Xiaomi

If you do decide to unlock the bootloader, follow the official procedure from Xiaomi. Unofficial methods (for example, through exploits) can lead to irreversible consequences.

Step 1: Linking your Mi Account

To unlock, you need a Mi Account tied to the device:

1. Go to Settings → Mi Account and log in.
2. Turn on data synchronization and confirm the phone number.
3. In the Settings menu → Additional → For developers, activate options: Debugging by USB, Unlocking OEM (OEM Unlocking).

Step 2: Requesting permission to unlock

Xiaomi requires confirmation through the Mi Unlock Tool app:

1. Download the official utility from the Xiaomi website.
2. Run it on a Windows computer (the.NET Framework 4.5+ is required).
3. Sign in with the same Mi Account as you do on your smartphone.
4. Connect your phone in Fastboot mode (as described above) and follow the program instructions.

Note: Xiaomi may request a 72-hour waiting period before unlocking, a security measure to keep the user from changing their mind.

Step 3: Unlocking

After the approval is granted:

1. Connect the device again in Fastboot mode.
2. In Mi Unlock Tool, press Unlock.
3. Wait until the process is completed (usually takes 1-2 minutes).
4. After the reboot, the loader will be unlocked.

To check if your model supports unlocking:

1. Go to the official Mi Unlock page.
2. Enter the name of your model in the search.
3. If the model is in the list of supported - unlocking is possible.

If your device doesn’t support official unlocking, but you still need to get root or customized recoveries, you’ll have to look for informal methods (e.g., exploits in specific firmware versions), but this is risky and can lead to data loss or device breakdown.

What to do after unlocking the loader

After successfully unlocking, you get access to new features, but you should also take precautions.

Safety recommendations

• 🔒 Set a strong password on the lock screen – unlocked bootloader simplifies access to data when theft.
• 🛡️ Use an antivirus (such as Malwarebytes) as the risk of malware infection increases.
• 🔄 Make regular backups through TWRP Mi Backup.
• 📱 Do not install firmware from unknown sources – this can lead to a brick or data leak.

Possible next steps

Now you can:

• 🔧 Install custom Recovery (TWRP) for backup and recovery.
• 📱 Swipe custom firmware (e.g. Pixel Experience for pure Android).
• 🔓 Get root rights through Magisk (without the SafetyNet trigger for some banking applications).
• 🎯 Remove Xiaomi’s built-in apps (e.g. Mi Browser, Mi Music) that cannot be disabled by standard means.

⚠️ Note: After installing custom firmware or obtaining root rights, do not update via OTA! This can cause a system failure, and all updates must be installed manually through the Recovery.

FAQ: Frequent questions about Unlocked on Xiaomi