Zeroing the filter on Xiaomi: reasons, methods and step-by-step instructions

If your Xiaomi smartphone suddenly stopped downloading apps, blocked access to certain functions, or sent a message about a “security filter”, it is likely that the internal restriction mechanism has activated, which can work after unsuccessful updates, manual interference with system files or suspected malware. Unlike a standard reset, resetting the filter requires specific actions, otherwise the restrictions will remain even after flashing.

In this article, we will analyze what is a Xiaomi filter, why it appears and how to completely reset it on different devices – from Redmi smartphones and other devices. POCO The Mi Band smartwatches, we will focus on methods that work on current versions. MIUI 14/15 HyperOS and the risks and alternative solutions for cases where standard resetting does not help.

What is Xiaomi’s filter and why is it activated?

The filter in Xiaomi devices is a security mechanism that blocks certain functions of the system when potentially dangerous actions are detected.

• 📵 Locking the installation APK — It is impossible to install applications from third-party sources, even when the Unknown Sources mode is enabled».
• 🔒 Restriction of access to settings – gray buttons in the developer menu or the “Developers For” section».
• ⚠️ The message “Device locked” appears when you try to change system parameters.
• 📱 Hanging on the logo MI — after a failed update or reset.

The main reasons for activating the filter:

• 🔄 Failed software update – interrupted firmware or custom version installation MIUI.
• 🛠️ Root access or modification of system files – even after removing root rights, the filter may remain.
• 🦠 Viral Infection – Some malware triggers defense mechanisms.
• 📦 Incompatible applications – for example, utilities for overclocking the processor or changing the processor IMEI.

⚠️ Note: If the filter is activated after installing firmware from a third party developer (for example, Xiaomi.eu or PixelExperience), a standard reset may not help.

On HyperOS devices (e.g. Xiaomi 14 or Redmi) K70) The filter may be a restriction on the use of Google Mobile Services (GMS) — Even if the device is certified, this is due to new mechanisms for verifying the integrity of the system.

How to determine if a filter is activated on the device

Before you start resetting, make sure that the problem is in the filter, not a hardware malfunction or a banal glitch of the system.

If you see any of these symptoms, the filter is likely activated, and the next step is to determine the reset method depending on the device model and the firmware version.

Methods of zeroing the filter on Xiaomi smartphones

The way you reset depends on the type of filter and the degree of limitations, and we'll look at the methods from the simplest to the most radical.

1. Reset via the settings menu (soft reset)

If the device is turned on and allows you to go into the settings, try a standard reset:

1. Go to Settings → About the phone → Reset settings.
2. Select “Reset All Settings” (not to be confused with “Network Reset”!).
3. Enter a password (if required) and confirm the action.
4. After the reboot, check if the restrictions have disappeared.

⚠️ Note: HyperOS devices may need to re-assign your Mi Account after a reset. If you forget your password, restore it in advance at account.xiaomi.com.

This method works 60 percent of the time, but if the filter is associated with damage to system partitions, it won't work, so move on to the next one.

2. Recovery Mode reset (hard reset)

If the soft reset didn’t work, try using the recovery mode:

1. Turn off the device.
2. Press the combination of the power button + Loudness up before the Mi Recovery logo appears.
3. Choose a language (if required).
4. Go to Wipe Data → Wipe All Data.
5. Confirm the action and wait for the completion.
6. Choose Reboot. → Reboot to System.

On certain devices (e.g, POCO F5 Or Redmi Note 12) Recovery menu can be in Chinese:

• 🧹 — Data Cleanup (Wipe Data).
• 🔄 — reboot (Reboot).
• 📱 — Update installation (Apply Update).

Make a backup copy of important data (photos, contacts)

Charge the device at least 50%

Make sure you know the password from your Mi Account (if tied)

Prepare. SIM-post-reset activation card-->

3. Firmware via Fastboot (for power users)

If the filter is associated with firmware damage (for example, after a failed update or rooting), you will need a complete flashing through Fastboot.

You'll need:

• 🖥️ Computer with Xiaomi drivers installed and Mi Flash Tool.
• 📥 Official firmware for your model (download from the official website).
• 🔌 Cable USB (preferably original).

Step-by-step:

1. Unpack the archive with firmware in a folder without Cyrillic characters (for example, C:\Xiaomi\fastboot_rom).
2. Turn off the phone and put it in Fastboot mode: press the Power button + Volume down.
3. Connect the device to the PC.
4. Launch the Mi Flash Tool, press Select and specify the path to the firmware folder.
5. At the bottom, select Clean All mode and press Flash.
6. Wait until the end (usually 5-10 minutes) and restart the device.

⚠️ Note: On devices with a bootloader locked, you will need to unlock it through the official Mi Unlock Tool before you run the firmware, which can take up to 720 hours (30 days) of waiting on new Mi accounts.

Zeroing the filter on smart watches and fitness bracelets Xiaomi

On Mi Band, Mi Watch or Redmi Watch devices, the filter is different: the watch can stop syncing with the phone, give an error "Device is locked" or reset after the update. Here's how to fix this.

1. Reset via the Mi app Fitness/Zepp Life

The safest way is:

1. Open the Mi Fitness app (or Zepp Life for new models).
2. Go to the profile of the device.
3. Click on the three dots in the top corner and select Untie the device.
4. Confirm the action and wait for the reset.
5. Then reconnect the clock to the phone.

If this method doesn’t work, try a physical reset:

1. Unplug the bracelet from the strap.
2. Find the reset button on the back (usually next to the charging contacts).
3. Press and hold it for 10-15 seconds until vibration.
4. Connect the watch to charging and wait for the reboot.

2. firmware through the utility Mi Band Tool (for advanced)

If the watch is stuck on the logo or doesn’t respond to a reset, you can use third-party utilities like the Mi Band Tool (available on GitHub), which requires an Android smartphone with root rights or a PC with a Bluetooth adapter.

Algorithm of action:

1. Install the Mi Band Tool and connect the watch to your phone.
2. In the utilities menu, select Firmware Update.
3. Download the official firmware for your model (for example, for Mi Band 7 – file with the extension.fw).
4. Run the update and wait until the end (don’t turn off the clock!).

⚠️ Note: Firmware through third-party utilities can lead to loss of warranty. On Mi Band 8 and newer models, Xiaomi blocks unofficial firmware, so use this method only as a last resort.

Frequent Mistakes and How to Avoid Them

When you zero the filter, you often have typical problems, and here are the most common ones and the ways you can solve them:

Another common mistake is ignoring backups: After a complete reset via Fastboot, it will be impossible to recover data (photos, messages, settings) even with specialized programs, always save important information to the cloud or external drive before starting the procedure.

💡

If after filter reset, the device continues to block the installation APK, Check the settings Settings → Annexes → Special access → Install unknown applications. Even after zeroing, this parameter can remain disabled.

Alternative ways if nothing helps

If standard methods don’t work, try the following:

1.Use of EDL-regime (for bricks)

If the device does not turn on even in Fastboot, there is a last chance – firmware through the EDL (Emergency Download Mode: This mode allows you to restore the device even with a damaged bootloader, but requires special equipment (Qualcomm). HS-USB QDLoader 9008) and knowledge.

Step-by-step:

1. Download the firmware in.mbn format for your model.
2. Connect the device to the PC in mode EDL (Usually, the contact is closed on the board).
3. Use the QFil or Mi Flash Tool utility in mode EDL.
4. Download the firmware and wait for completion.

⚠️ Attention: Incorrect actions in the mode EDL If you're not sure about your skills, you can call a service center.

2. Contact the Xiaomi Service Center

If all attempts to reset the filter on their own failed, you can only contact official partners of Xiaomi.

• 🔧 Warranty repair (if the device is under warranty).
• 🛡️ Use of original firmware and tools.
• 📄 Preservation of the warranty (with independent firmware it is lost).

The cost of filter resets in the service is usually 1,500-3,000 rubles, depending on the model. On devices with HyperOS (for example, Xiaomi 14), the price may be higher due to the complexity of the procedure.

3. Use of custom firmware (for enthusiasts)

If the filter is activated due to a conflict with the official software, you can try installing custom firmware, for example:

• 📱 Xiaomi.eu – Optimized version MIUI China-bound.
• 🤖 PixelExperience or LineageOS – firmware based on Android without branded restrictions Xiaomi.
• 🔄 HyperOS Port – unofficial builds of a new shell for older devices.

Please note that to install custom firmware will require:

1. Unlock the bootloader (bootloader).
2. Install Custom Recovery (TWRP)
3. Backup the current firmware.

💡

Custom firmware can solve the filter problem, but it creates new risks: loss of warranty, unstable sensors, problems with updates. Use them only if official methods have not worked.

FAQ: Frequent questions about zeroing the Xiaomi filter