How to block Xiaomi phone: all ways to protect against unauthorized access

Protecting your personal data on a Xiaomi smartphone is not just a recommendation, but a necessity in the era of digital threats. Even if you are sure that your Redmi Note 12 or POCO F5 will never get lost, locking the screen prevents accidental clicks, protects from prying eyes and blocks access to payment systems. In this article, we will discuss all the current ways to lock Xiaomi devices – from classic PIN code to biometric methods, and also explain how to avoid common errors in setting up protection.

It’s important to understand that locking methods on Xiaomi are not only model-dependent (Mi 11 Ultra or Redmi A2), but also MIUI shell version. For example, MIUI 14 introduced Face unlock 3D, which is not available on older versions. We took these nuances into account and prepared universal instructions that work on most of the brand’s devices. If your smartphone runs on HyperOS (the new firmware for flagships in 2026), pay attention to some notes in the article.

1. Standard screen locking methods on Xiaomi

Basic protection methods are available on all Xiaomi devices, regardless of the model and version of the software. Their main advantage is compatibility with budget devices like Redmi 10A or POCO M5.

PIN is the most reliable method in terms of security, but it's less convenient for everyday use. Unlike a pattern lock, a PIN is harder to pick up by brute force, especially if you use a 6+ digit combination. The password (text) is even more secure, but it's difficult to type on the go. The pattern lock is convenient, but studies show that 80% of users choose one of the top 10 patterns, making it vulnerable to hacking.

• 🔢 PIN: 4-16 digits. Recommended length: 6+ symbols to protect against brute force attacks.
• 🔑 Password: letters, numbers and symbols. Minimum length is 4 characters, but preferably 8+.
• 🎨 pattern lock: connect 4-9 dots. Do not use simple patterns (e.g., the letter "Z" or a square).

To establish or change the blocking method:

1. Go to Settings → Lock screen → Password and security.
2. Select Screen Lock and enter the current password (if it is set).
3. Click on the desired type of lock and follow the instructions on the screen.

⚠️ Attention: If you forget your PIN or password, it will be impossible to unlock Xiaomi without a data reset.Devices with a Qualcomm chip (most models) allow you to reset the lock via Fastboot, but it requires technical skills and deletes all data.

Biometric blockage: fingerprint and facial recognition

Xiaomi’s biometric locking methods combine high unlock speeds with an acceptable level of security, but they have limitations:

• 👆 The fingerprint only works on models with a physical or ultrasonic scanner (e.g. Xiaomi 13 Pro or Redmi). K60). Budgetary apparatuses, like POCO C55 They are often deprived of this sensor.
• 😊 Face recognition is available on all front-facing camera devices, but 2D-The scanner (on most models) can be fooled by the photo. 3D-The scanner (e.g. Mi 11 Ultra) provides reliable protection.

To add a fingerprint:

1. Open Settings → Password and Security → Fingerprint.
2. Enter a PIN or password for confirmation.
3. Follow the instructions on the screen, putting your finger on the scanner from different angles.
4. Add a backup unlock method (required!).

To adjust facial recognition:

1. Go to Settings → Lock screen → Unlock face.
2. Choose Add Face Data and follow the prompts.
3. On models with MIUI 14+, the option Require open eyes is available – turn it on for additional protection.

⚠️ Note: Biometric data is stored in a Trusted Execution Environment and not transferred to Xiaomi servers. However, after resetting, all fingerprints and faces are deleted without recovery.

3. Additional security settings in MIUI

Beyond screen locking, MIUI offers a number of features to enhance device security, which are often ignored, but can prevent data theft even if an attacker gains physical access to the phone.

The second space feature deserves special attention, and it allows you to create a completely isolated environment with separate:

• 📱 Applications (you can duplicate messengers, social networks).
• 📂 Files and media.
• 📞 Call log and SMS.

This is useful if you want to separate work and personal data, or give the phone to a child without risking your privacy, and to switch between spaces, swipe down the lock screen with two fingers.

4. SIM-card lock and network restrictions

Many users have overlooked the fact that SIM-The card also requires protection. By default, Xiaomi PIN SIM-The card is disabled, allowing the attacker to retrieve it and use it on another device, and in addition, you can restrict access to mobile Internet or calls in network settings, which is useful for controlling costs or keeping children safe.

To enable a PIN code for SIM-map:

1. Open the Settings. → SIM-maps and mobile networks.
2. Choose yours. SIM-card (if there are several).
3. Activate the SIM-Block option and enter the PIN (usually 0000 or 1234 by default).
4. Change the standard PIN to a unique one (remember it!).

To limit network access:

• 📵 Disconnecting Mobile Data: Settings → SIM-map → Mobile traffic.
• 🔕 Blocking Outbound Calls: Requires third-party applications (e.g. AppLock).
• 🌍 Restriction of roaming: Settings → SIM-map → roaming.

💡

If you travel frequently, keep your PIN code. SIM-In some countries (e.g. the United States), operators default to blocking SIM without a PIN code on the first connection.

5 What to do if your Xiaomi phone is locked

Situations where Xiaomi is blocked are divided into two types:

1. Forgotten password/PIN – the device requests data to unlock.
2. Hardware locking – the phone does not respond to pressing (for example, after a fall).

The first one depends on the MIUI version:

• 🔄 MIUI 12 and later: after 5 unsuccessful attempts, the button Forgot the password will appear. Press it and log in to the Xiaomi account associated with the device.
• 🔧 MIUI 11 and older: Recovery reset will be required (data will be deleted).
• 💻 Any version: if the debugging is enabled USB, You can try to unlock through ADB (PC).

For hardware locking:

• 🔋 Try to press the power button to 20.+ second-on-seconds.
• 🔌 Connect to charging for 30 minutes - sometimes a discharged battery blocks the switch on.
• 🛠️ If the screen is damaged, but the phone responds to touch, connect the mouse to the phone. OTG navigation.

⚠️ Note: On HyperOS devices (2026), a Fastboot reset may result in a permanent lock on the bootloader if you do not use an official Xiaomi account.

💡

If you buy Xiaomi with your hands, be sure to check if the previous owner’s account is linked to it. Go to Settings → Xiaomi Account and try untie the device. If the system requests a password, the phone is tied and after reset it will not be activated.

6. Hidden blocking features for power users

For those who want to protect their Xiaomi as much as possible, there are additional tools that are not on by default.These techniques require technical knowledge but provide a high degree of security.

Device encryption – full encryption of user data (including files and applications). On Xiaomi with MIUI 13+, encryption is automatically enabled when you set a password, but on older versions it must be activated manually:

1. Go to Settings → Additional → Privacy → Encryption and credentials.
2. Select Encrypt your phone (the process will take 30-60 minutes).
3. Make sure the battery is over 80% charged.

Bootloader lock prevents custom firmware installation and access to system partitions. By default, the bootloader is locked on all Xiaomi, but if you unlock it (for example, to install TWRP), you can return the lock via the command:

fastboot flashing lock

Hidden Developer Mode allows you to disable USB debugging and other potentially dangerous options to activate it:

1. Go to Settings. → The phone.
2. 7 times click on the MIUI version.
3. Back to Settings → Additionally. → For developers.
4. Disable USB Debugging and OEM Unlock (unless you use custom firmware).

FAQ: Frequent questions about Xiaomi blocking