Xiaomi security: where to find, how to check and why

When it comes to the security of Xiaomi smartphones, many users immediately think of passwords, fingerprints or data encryption. However, there is one small but critical component that not everyone knows about: the security element (or security chip), this tiny module is responsible for protecting against unauthorized access to the hardware functions of the device, verifying the authenticity of the firmware and even locking the phone when you try to hack.

In this article, we will look at where the security element is located on different Xiaomi models, how to identify it, why it is needed in practice and what to do if it is damaged. You will also learn how to check its performance and what errors can indicate problems with this component.

What is the security element in Xiaomi smartphones

The security element (sometimes called the security chip or the secure element) is a specialized microcontroller built into the smartphone motherboard.

• 🔐 bootloader protection – prevents installation of unofficial firmware without unlocking.
• 🛡️ Storage of cryptographic keys – used to encrypt data, including biometric information.
• 📱 Hardware component authentication – checks the authenticity of the display, battery and other modules.
• 🔄 Update control – blocks installation of downgrade protection firmware).

Starting with the Xiaomi Mi 5 (2016) and later, security has become an integral part of the device architecture, and in older smartphones (such as the Redmi Note 3), it was performed by a separate eMMC module or Qualcomm processor with built-in security features. Modern devices (e.g. Xiaomi 13 Ultra or Redmi) K60 Pro) use dedicated chips such as Qualcomm Secure Processing Unit (SPU) or analogues from MediaTek.

It is important to understand that the security element is not the same as TEE (Trusted Execution Environment, although closely related. TEE — It is a software environment for safe code execution, and a security element is the hardware component that ensures its operation.

Where the security element is physically located on the board

The exact location of the security element depends on the model of the smartphone and its hardware platform, but there are general principles that will help you find it:

1. On the motherboard – usually next to the main processor (SoC) or memory module (RAM/eMMC/UFS).
2. Under a metal screen – often soldered to the board and closed with a protective shield (especially in flagships).
3. Next to antenna contacts – in some models (for example, POCO F3) security chip is located on the antenna tracks.

Below is a table with an approximate location of the security element in popular Xiaomi models:

To accurately identify a security item, look for the labeling, most commonly chips labeled:

• 🔹 QSE150, QSE200 — Qualcomm.
• 🔹 ST33, S3K250AF — Samsung or STMicroelectronics.
• 🔹 MT63 — MediaTek (for example, MT6360).

⚠️ Note: On some boards, the security element can be integrated into the main processor (for example, in Apple A-series or Exynos). 9A).

How to check the performance of the security element

If your Xiaomi smartphone is not being stable (e.g., not accepting updates, issuing errors when unlocking the bootloader or refusing to encrypt data), the problem may lie in the security element.

1. Through service codes

Enter the following commands in the "Phone" application:

• 📱 ##4636## → Go to Phone Information and check the status of Secure Boot.
• 🔒 ##284## - Hardware Security Test (not working on all models).

2.Across Fastboot

Connect your smartphone to your PC, switch to Fastboot mode (clip Volume down) + Meals) and execute the command:

fastboot getvar secure

If secure: yes appears in the answer, the security element is active. no response or error FAILED (remote: unknown command may indicate a problem.

3. Through the system logs

Install the Logcat Extreme app and search the logs for keywords:

• 🔍 Keymaster - Encryption errors.
• 🔍 secure_element — hardware-module problems.
• 🔍 boot_verification Failed - Failure to check the loader.

Unlock the bootloader through the Mi Unlock Tool|

The smartphone does not accept official updates (the error "can not downgrade the version")|

Constant resets to factory settings for no reason|

Error "This device is corrupted" when downloading|

No possibility to add a fingerprint or face-->

If you find one or more signs from the checklist, it is likely that the security element is damaged or blocked, in which case it is recommended to contact the Xiaomi service center, as self-repair can lead to complete loss of data.

What to do if the security element is damaged

Damage to the security element is one of the most difficult hardware problems, as this chip is often soldered to the board and cannot be replaced separately.

1. Program reset

Sometimes it helps to completely reset through Fastboot:

fastboot erase userdata


fastboot erase cache




fastboot reboot

⚠️ Warning: This command will delete all data on the device, including photos and apps. Try to save important information through Mi Cloud or beforehand. ADB backup.

2. Flashing through EDL

If the smartphone does not load, you can try to flash it in mode EDL (Emergency Download Mode) with tools like the Mi Flash Tool:

1. Download the official firmware for your model from the Xiaomi Firmware website.
2. Connect your phone to your PC in mode EDL (Test Point contact closure on the board).
3. Select the Clean All and Lock option in the Mi Flash Tool.

⚠️ Attention: Firmware through EDL It can lock the device permanently if the security element is critically damaged!

3. Replacement of motherboard

If the software methods don't work, you just have to replace the board.

• 💰 The cost of replacement can be increased 70-80% from the price of a new smartphone.
• 🔧 After the replacement, you will need to link the fee to the Mi Account account (in the service center).
• 📱 Data from internal memory (UFS/eMMC) will be lost.

💡

Before you change the board, check if your model is covered by a warranty. In some cases, Xiaomi will replace the device for free in case of hardware failures, even if the warranty period has expired (under the goodwill program).

Is it possible to bypass the security element of Xiaomi?

It is technically possible to bypass hardware protection, but it requires a deep knowledge of reverse engineering and often leads to a breeze (complete inoperability) of the device.

1. Unlock the loader

Xiaomi's official way of doing this is to use the Mi Unlock Tool, but even after unlocking, the security still works, just lets you install custom firmware, and you'll need to turn it off completely.

• 🔓 Get root rights (for example, through Magisk).
• 📝 Edit the file boot.img, sign-check.
• 🔄 Sending a modified boot through Fastboot.

2. Use of exploits

Some vulnerabilities can bypass security checks, such as:

• 🐞 DirtyCOW – exploit for older versions of Android (up to 7.0).
• 🐞 CVE-2020-0041 — vulnerability in Qualcomm chips that allows access to the TEE.

However, most exploits are already closed in new firmware, and their use can lead to blocking. IMEI or the Mi Account.

Hardware modifications

In extreme cases, enthusiasts resort to:

• 🔧 Chip soldering – replacing the security element from the donor board (extremely risky).
• 🔌 Power outage – physical disconnection of the chip contacts (will result in loss of encryption functions).

⚠️ Warning: Any attempt to circumvent a security element violates the warranty and may render the device unsuitable for official updates. DMCA rustic).

Frequent errors related to the security element

If the security element is not working properly, the smartphone can produce various errors, the most common of which are and their possible causes:

If you encounter one of these errors, don't try to solve the problem at random. Wrong actions (for example, firmware of the wrong version of software) can make things worse. XDA Developers or 4PDA, There is a section dedicated to your model.

How to protect the safety element from damage

The security element is one of the most vulnerable components of a smartphone, as it is sensitive to:

• ⚡ Voltage drops (for example, when using low-quality chargers).
• 💧 Moisture and corrosion (even after a slight water ingestion).
• 🔥 Overheating (for example, when playing with poor ventilation).
• 🛠️ Mechanical damage (falls, impacts, unprofessional repairs).

To prolong the life of this component, follow simple rules:

Use only original or certified chargers|

Avoid overheating (do not cover your phone while charging, do not play heavy games for hours)|

Do not disassemble a smartphone without experience (risk of damage to the contacts of the chip)|

Update your firmware regularly (updates often contain patches for security vulnerabilities)|

Do not install custom firmware from unknown sources-->

Especially careful should be the owners of budget models (for example, Redmi). 10A or POCO M4 Pro, where a security element can be integrated into the main chipset without additional protection, even a minor power failure can lead to fatal consequences in such devices.

💡

The security element is not just a “hack protection” but a critical component that ensures the stability of a smartphone, which often leads to a complete loss of functionality of the device, and it is almost impossible to restore it on your own.

FAQ: Frequent questions about Xiaomi’s security element