Xiaomi’s modern smartphones come with a variety of security features designed to protect user data and the integrity of the operating system, one of which is Anti Relock, which often comes as a surprise to software enthusiasts. Many users experience a device lock after trying to change region or firmware, not fully understanding what happened and how to bring the gadget back to life.
In this article, we will discuss in detail what Anti Relock is, why it is activated, and what actions lead to the protection operation, you will learn the difference between Mi Account and this system lock, and you will receive step-by-step instructions for restoring access. It is important to understand that ignoring system warnings can lead to serious consequences, including the inability to boot the operating system with standard methods.
It should be noted that working with system partitions and bootloaders always involves risks. Anti Relock is not designed to annoy the user, but to prevent the installation of modified software on stolen or lost devices. However, in the hands of an experienced user, an unlocked bootloader opens up a lot of opportunities, and knowledge of the principles of protection is critical for the safe modification of a smartphone.
The essence and purpose of the function Anti Relock
Anti-Re-Localization (Anti-Re-Localization) is a security mechanism implemented in MIUI and HyperOS firmware. Its main task is to prevent the device from changing region to another without first resetting the settings or when the bootloader is unlocked. The system tracks the compliance of the region in the settings and the region for which the installed firmware is intended.
When a user tries to change the region in the smartphone settings, the system checks: If the device bootloader is unlocked (Unlocked Bootloader), and the region in the menu changes to a different one from the current one (for example, from Global to Indian or Chinese), the security trigger is triggered. The device can lock, requiring a return to the original settings or blocking the system from booting, this is done to make it more difficult to resell devices stolen in one region, in another where they may cost more.
⚠️ Warning: Attempting to change region on an unlocked device without first resetting data can lead to a cyclical reboot or complete locking of the interface.
It is important to distinguish between Anti Relock and the standard Mi Account lock, which requires you to enter a password from your account after a data reset to confirm ownership, while Anti Relock responds to a mismatch between software parameters and the bootloader’s state, and understanding this difference helps you choose the right recovery strategy.
How Defense and Major Triggers Work
The Anti Relock protection mechanism is quite simple, but it is strict. The system constantly monitors the status of the bootloader flag and the current region. If you unlock the bootloader officially through the Mi Unlock application, the corresponding label remains in the system. When you try to change the region in the Settings menu → Additional settings → Region, the system sees a discrepancy.
The main triggers that cause the activation of protection are:
- 🔒 Change the region in settings when unlocked loader without prior data reset (Wipe Data).
- 🔄 Attempt to flash the device with firmware from another region (e.g. Global on China) without blocking the bootloader back.
- ⚙️ Changes to system files that identify the region (CSC), root-right.
- 📱 Using an engineering menu to force a region change on devices with an open Bootloader.
It should be noted that on Locked Bootloader devices, region change is usually smooth, as the system considers the device to be trusted and complete. The problems begin after the unlock procedure, which is necessary to install custom receptacles or obtain superuser rights, at which point the system's trust level decreases, and additional checks are included.
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Before changing the region on an unlocked Xiaomi, always make a full backup of data and be ready for the Wipe All Data procedure.
Symptoms of activation of protection on the device
You can usually tell that Anti Relock has been activated right away. The behavior of the smartphone becomes uncharacteristic of normal work. Instead of the usual desktop, the user can see a screen demanding that the region settings be returned to their original state or a message that the current settings cannot be applied.
In some cases, the device can go into an endless bootloop. The screen goes out, the MI or Xiaomi logo appears, and then the cycle repeats again. This is because system processes cannot be properly initialized due to conflicting regional settings and the status of the bootloader.
Symptoms can vary depending on the version of MIUI or HyperOS and the processor model:
- 🚫 Lock screen with the requirement to reset the region (relevant for new versions).
- 🔄 Bootloop – Infinite reboot on the manufacturer’s logo.
- 📶 Lack of network or broken Wi-Fi due to incorrect regional modem settings.
- ⏱️ Countdown timer that forbids you to use your phone before the time is up (rarely, but occurs).
⚠️ Warning: If the phone went into a bootloop after a region change, don't panic.Most often, the problem is solved by a software reset, but requires access to Recovery mode.
Unblocking and Restoring Access Methods
Restoring access to a device trapped in the Anti Relock depends on the current status of the bootloader and the ability to get into the recovery menu. If the phone turns on and lets you log in for even a short time, the first thing you do is try to return the original region to the settings. If that's not possible, a more radical approach will be required.
The most reliable way is to completely reset your data via Recovery mode, which requires you to turn off the device and press the button combination (usually Volume Up + Power). In the menu you will select Wipe Data → Wipe All Data, which will delete all user data, but return the region settings to factory settings, which often removes the lock.
If standard reset does not help, you will need to use the Mi Flash Tool utility and Fastboot mode:
- 💻 Connect your phone to your PC in Fastboot mode (clamping Volume Down) + Nutrition).
- 📥 Download the official firmware for your region and model from the site miui.com.
- ⚡ Launch the Mi Flash Tool, select the firmware and press the Clean All button (clean everything up).
- 🔒 Wait until the process is over and, if necessary, re-block the bootloader with the command fastboot oem lock.
☑️ Checklist before restoration
You can only lock the bootloader on a fully stock firmware. If you used TWRP or obtained root rights, return the original boot image (boot.img) and the recovery first.
Table of compatibility of regions and statuses of the loader
Here is a chart showing how different combinations of bootloader status and region affect your device, which will help you plan your actions and avoid security conflicts.
| Bootloader status | Firmware region | Region in settings | Result/Risk |
|---|---|---|---|
| Locked (Blocked) | Global (Global) | Global | Normal work, no risks. |
| Locked (Blocked) | Global | China / India | It usually works, but there may be restrictions on services. |
| Unlocked (Unlocked) | Global | China | High risk of anti-relock, Wipe Data is required |
| Unlocked | Custom (Castom) | Anybody. | Stable operation, but blocking the bootloader is prohibited |
What happens if you ignore the warning?
Prevention of problems with reflashing
To avoid activating Anti Relock in the future, you should follow certain rules when modifying your smartphone. The main rule is: never change the region on a device with an unlocked bootloader without prior preparation. If you need to use firmware from another region, you should install it immediately through Fastboot with complete data clearing.
Use only official unlock and firmware tools. Third-party utilities may not properly handle region flags, which leads to conflicts. It is also recommended to check the status of the device through the fastboot getvar all command before any manipulation.
To safely change the region, follow the following steps:
- 📂 Save all important data to an external medium or to the cloud.
- 🗑️ Complete a full Wipe Data reset in the sewage Recovery before changing the region in the menu.
- 🌐 Make sure that SIM-The card corresponds to the firmware region (sometimes this affects activation).
- 🔄 After the change of region, give the phone 10-15 minutes to apply the settings before active use.
⚠️ Note: On new HyperOS devices, unlocking the bootloader has become much more difficult and requires a high-trust account in the Xiaomi community.
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The safest way is to use global firmware for your region and not touch the bootloader unless you need root rights or custom Recovery.