How to permanently block a phone number on Xiaomi: all the ways 2026

Spam calls, intrusive collectors, or former acquaintances who don’t understand the word “no” are the problems faced by every second Xiaomi owner. Fortunately, MIUI offers several built-in tools to block unwanted numbers, and also supports third-party solutions. But not all methods are equally effective: some block only calls, others also SMS, and still others work even after resetting the phone to factory settings.

In this article, we will discuss all the current locking methods for Redmi, Poco, Black Shark and other MIUI 12-15-based smartphones (including global and Chinese firmware), learn how to lock a number through standard settings, applications from operators (MegaFon, Beeline, MTS), as well as what hidden MIUI features allow you to block mask numbers (for example, all numbers with the code +7 495 ***).

1. Blocking through standard MIUI settings

The easiest way is to use the built-in MIUI tools. They do not require additional applications to be installed and work on all models, including the Redmi Note 12, Poco X5 and Xiaomi 13. However, this method has a limitation: the lock is reset when you update your firmware or reset your phone to factory settings.

To block the number:

1. Open the phone application (pipe icon).
2. Go to the magazine tab and find the desired number.
3. Click on the number → select Block (or Details → Block in older versions of MIUI).
4. Confirm the action in the window that appears.

To manage the list of blocked numbers:

• 📱 Go to Settings. → Annexes → Phone. → Number locking.
• 🔍 Here you will see all the locked numbers and you can unlock them or add new ones manually.
• ⚙️ Enable the option to Lock Unknown Numbers to automatically screen out calls from hidden numbers.

Has the number been added to the blacklist?|Is the lock on? SMS (if necessary)|Have you kept contact for unlocking?|Checked that the number is not important (bank, support service)-->

⚠️ Attention: B MIUI 14+ blocking through the phone settings does not apply to messages in WhatsApp or Telegram. This will require separate settings in the messengers themselves.

2. Blocking through the application “Security” (Security)

Security (or Global Firmware Security) offers advanced locking features, including fraud protection and SMS. This method is more reliable than standard, as it is integrated with the Xiaomi cloud database and updated automatically.

Instructions:

1. Open the Security app (shield icon).
2. Go to the section "Call Blocking" or "Call Blocking".
3. Click Add to the blacklist and select a number from the magazine or enter it manually.
4. Activate the option to Block fraudulent numbers to use the Xiaomi database.

Advantages of this method:

• 🔄 Synchronization of the blacklist with the Mi Account (linked to the phone).
• 🛡️ Automatically locking known fraudulent numbers (the database is updated once a week).
• 📵 The ability to block not only calls, but also SMS/MMS.

Through phone settings|Annex “Security»|Operator services|Third-party annexes|I don't block numbers.-->

3. Blocking through USSD-operator

If you want to lock a number at the SIM level, use your mobile operator, which works even after you reset your phone or replace your device, as the lock is tied to the number, not your smartphone.

USSD-teams for popular operators:

• 📱 MTS: Dial *111*77# → Choose the Black List. → add a number.
• 📱 Beeline: send SMS with the text block [number] on 5100 (for example: block 79123456789).
• 📱 MegaFon: dial *130# → Services → Blacklist.
• 📱 Tele2: send SMS with block text [number] on 1577.

Please note:

• 💰 Some operators have paid service (for example, MegaFon – 3 rubles / day).
• 🔄 Blocking through the operator can take up to 24 hours.
• 📵 Not all operators are blocking SMS — clarify the conditions on the official website.

4. mask lock (for example, all numbers with +7 495 ***)

If you get calls from a specific region or series of numbers (for example, all numbers with the code +7 499), MIUI has a hidden mask lock feature, which is only available through the Security app and does not work on all firmware.

How to set up:

1. Open Security. → Number locking.
2. Click on the three dots in the upper right corner → Add the rule.
3. Select the lock by prefix.
4. Enter a mask, for example: +7495 - will block all Moscow rooms. +79 - block all Russian mobile numbers (caution!). +375 - block all Belarusian numbers.

Keep the rule.

⚠️ Note: Mask locking can lead to missing important calls (e.g. from a bank or delivery service). Before setting up, check if the services you need are using blocked prefixes.

If the option Block by prefix is not:

• 🔧 Update the Security app via Google Play or Mi App Store.
• 🌐 Install a global firmware (if you have a Chinese version) MIUI, This function may not be).
• 📲 Use third-party apps like Truecaller or CallApp that support mask locking.

5. Third-party applications for number locking

If Xiaomi’s built-in tools aren’t enough, try specialized apps. They offer advanced features like:

• 🔍 Detecting spam calls from a database (for example, Truecaller has a database of 300 million numbers).
• 📊 Call statistics and SMS lock-in.
• 🔄 Automatic update of the blacklist.
• 🌍 Blocking international numbers (useful to protect against fraudsters from abroad).

Top.-3 apps:

How to set up Truecaller on Xiaomi:

1. Download the app from Google Play or Mi App Store.
2. Register (you can use Google or Mi Account).
3. Enable Call and SMS permissions in your Android settings.
4. Go to Settings → Block and add numbers manually or activate automatic spam blocking.

💡

If call notifications stop coming after installing Truecaller, check your battery optimization settings: Settings → Applications → Application Management → Truecaller → Battery Optimization → No Limits.

6. How to unlock a number or restore a blacklist

If you accidentally blocked an important number or lost access to a blacklist after resetting your phone, use these methods:

Unlocking through MIUI settings:

1. Open Settings → Applications → Phone → Lock numbers.
2. Find the number in the list and swipe it left or click Delete.

Restore the blacklist after resetting:

• 🔄 If you used the Security app and were logged in to Mi Account, the blacklist will be restored automatically when you re-assign your account.
• 📱 If the lock was through the operator, check the list of blocked numbers through the USSD-teams (see section 3).
• ☁️ For third-party applications (like Truecaller) restore backup from the cloud.

What to do if the number is not unlocked:

• 🔧 Restart your phone – sometimes the lock is reset after you restart.
• 📞 Check if the number is locked at the operator level (dial) USSD-blacklist).
• 🛠️ Update the firmware - in older versions MIUI There are some blockage bugs.

💡

If you are selling or transferring your phone to another person, be sure to clear the blacklist in your MIUI settings and unplug your Mi Account so that the new owner does not gain access to your locks.

7. Frequent problems and their solutions

Sometimes the number lock on Xiaomi works incorrectly, let’s look at typical situations and ways to fix them:

Problem 1: Calls from a blocked number still pass.

• 🔍 Check if the number has been added to the exceptions (for example, in Truecaller or settings). MIUI).
• 📵 Make sure the lock is on for calls and SMS (In some cases, they are set up separately).
• 🔄 Reinstall updates for Phone and Security apps.

Problem 2: You can't add a number to a blacklist.

• 📱 Check if there is enough memory on the phone – if there is a lack of space, some functions MIUI switch off.
• 🔧 Reset the settings of the application Phone: Settings → Annexes → Phone. → Warehouse → Clear the data.
• 🌐 Install global firmware if you have a Chinese version MIUI (It may have limitations).

Problem 3: After the MIUI update, the blacklist was reset.

• ☁️ If you used Mi Account, try syncing your data again.
• 📋 Export the blacklist manually before updating (via Security) → Number locking → Exports).
• 🔄 Go back to the previous version. MIUI, If the new firmware contains a critical bug.

FAQ: Answers to Frequent Questions