How to unlock Xiaomi bootloader through PC: step-by-step instructions

Unlocking the bootloader is a fundamental step for any enthusiast who wants to take full control of their device, allowing the smartphone owner to install custom firmware such as LineageOS or Xiaomi.eu, remove system debris and even improve the performance of the gadget, but this process is not without difficulties and requires strict adherence to the algorithm of actions to avoid turning the device into a “brick”.

The official method provided by the developers involves using a personal computer and a specialized utility Mi Unlock Tool. This is the only way to remove software restrictions without risking damage to the hardware. Unlike exploits used in the past, the modern method requires an account binding and waiting for a certain time.

Before you start taking action, you need to realize that unlocking the bootloader completely erases all data from the device's internal memory, a security mechanism that cannot be circumvented by regular means, so pre-backup of contacts, photos and important documents is a prerequisite for starting the procedure.

Preparation of equipment and software

The success of the operation depends on the quality of the workplace. You need a stable Internet connection, a serviceable one. USB-cable (preferably original or high-quality analogue with thick wires) and a computer running the Windows operating system. Using virtual machines or macOS for the official utility Mi Unlock is impossible without complex emulators, so it is better to use a full-fledged PC or laptop.

You need to install ADB and Fastboot drivers on your computer. Without them, the system will not be able to correctly recognize the smartphone in bootloader mode. You should also download the unlocker program itself from the official MIUI community site. Using modified versions of Mi Unlock from third-party developers can lead to a leak of your credentials.

It's important to check the version of the operating system on your smartphone. Sometimes on global firmware versions, the procedure may be different from Chinese builds. Make sure that the developer settings activate the "Factory Unlock" option. If this item is hidden, you will need to click on the build number several times in the "About Phone" section.

Registration and binding of the Mi Account

The centerpiece of Xiaomi’s ecosystem is the Mi Account, which requires that the device be logged into that account to perform the operation to unblock the bootloader. SIM-the card to which the account is registered must be installed in the smartphone at the time of binding.

The binding process is as follows: go to the settings menu, select About, then tap MIUI seven times to activate the developer menu. Next, in the advanced settings, look for Developer, and select Mi Unlock Status, which is where the device syncs with the company server.

⚠️ Note: After a successful account assignment, the system will require you to wait a certain amount of time, usually 168 hours (7 days), but in rare cases, the waiting period can be reduced to 36 hours or extended to 15 days.

Don't try to reset or re-link your account during this period, the timer may get lost and the wait will start again. The wait status is displayed directly in the "Mi Unlock Status" menu on your smartphone screen, and only after this period, the unlock button will become active.

Translation of the smartphone to Fastboot mode

To interact with the bootloader, the smartphone must be in a special diagnostic mode known as Fastboot, which shuts down the main operating system, and the device waits for low-level commands from the computer, which can be logged in by software or hardware.

The most reliable method is to use a keyboard combination. Turn off your smartphone completely. Then press the volume button and, without letting go, plug it in. USB-And there's a picture on the screen of a rabbit fixing an android, and it says, FASTBOOT orange.

If the phone is responding to the cable connection immediately after switching off, but does not enter mode, check if the volume button is accidentally pinched. ADB-Team if the phone is already debugged USB-debugging:

adb reboot bootloader

The computer must make a sound of the new device's connection. In the Windows Device Manager, the Android Bootloader Interface should appear in the "Android Devices" or "Other Devices" section "QHSUSB_BULK", The drivers are installed incorrectly and the procedure cannot be continued.

Unlocking process with Mi Unlock Tool

Run the Mi Unlock Tool on your computer on behalf of the administrator. Log in to the same Mi Account that was linked to the phone. The program will automatically check the status of the device and server. If the waiting timer has not expired, the utility will report this and show the remaining time.

When all conditions are met, press the "Unlock" button, a warning will appear that all data will be deleted, confirm the action, the process will take from a few seconds to a few minutes, during which time the progress bar will be displayed on the smartphone screen, and the program on the PC will show the percentage of execution.

Once the process is complete, the device will automatically restart, and the first boot after unlocking the bootloader can last much longer than usual, up to 10-15 minutes, which is normal behavior for a system that performs partition integrity checks.

Possible errors and methods of their elimination

The procedure doesn't always go perfectly the first time. One of the most common problems is a server connection error or a message saying "Couldn't verify device." This is often associated with an unstable Internet connection or an antivirus blocking ports. Try turning off the firewall or using mobile Internet instead of Wi-Fi.

If the program sees the phone but doesn't start the process by giving a driver error, try manually updating the driver in Device Manager. Select "Android Bootloader Interface" from the list of standard Microsoft drivers if the system offers a choice. USB-port, preferably USB 2.0 located on the back of the system unit.

⚠️ Warning: If the cable was turned off during the unlocking process or the laptop went out of power, don't panic. In most cases, the device will simply remain in Fastboot mode.

More serious is the situation when the phone goes into an endless restart (bootloop) after trying to unlock, in which case it may be necessary to firmware the device through the Mi Flash Tool utility in Clean All mode, which will return the smartphone to a factory state with a locked bootloader if the unlock was not completed successfully.

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Use it. USB-externally powered hub, if the connectors on the computer are old or weak, a lack of voltage at a critical moment can interrupt the data transmission and cause an error.

Impact of Unblocking and Security Measures

Once successfully unlocked, Unlocked status appears in the bootloader, which opens the door to install Custom Recovery (e.g., TWRP) and obtain superuser rights (Root). However, the user must be aware of the risks: some banking applications and services (Google Pay, Mir Pay) may refuse to work on devices with the unlocked bootloader due to a breach of security integrity.

There are some methods of disguise, such as Magisk, to circumvent these restrictions, but this requires additional knowledge. Also, it is worth considering that the warranty from the official Xiaomi service on the software is removed. In the event of a hardware breakdown, service centers may refuse repairs if they see signs of third-party interference, although physically unlocking the bootloader does not affect the wear of the processor or screen.

If the phone gets into the hands of an attacker when it's off, they can connect it to their PC and read data if there's no encryption installed, so using a complex lock-screen password becomes critical.

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Unlocking the bootloader is an irreversible action in the context of warranty and security, giving full control over the system in exchange for a decrease in the level of data security.

Frequently Asked Questions (FAQ)