How to blacklist a number on Xiaomi: 5 ways to use MIUI 14 and 15

Spam calls, intrusive collectors, or ex-acquaintances who don’t want to leave you alone are the problems that almost every Xiaomi smartphone owner faces. Fortunately, MIUI offers several ways to block unwanted numbers, both through standard settings and third-party apps. But how exactly does the blacklist on Redmi, POCO, or Xiaomi 13/14 flagships work? And why does the lock sometimes fail?

In this article, we will discuss all the current methods of adding numbers to the blacklist on Xiaomi devices with MIUI 14/15 (including global and Chinese versions of firmware), learn how to block a number through the Phone application, security settings, and what to do if the lock does not work, plus unique life hacks for blocking hidden numbers and spambots, which are not in the official documentation.

1. Method 1: Blocking through the call log

The fastest way to blacklist a number is to do it straight from the call log, which works on all Xiaomi smartphones, regardless of model (whether it’s Redmi Note 12 or Xiaomi 13 Ultra).

Instructions:

• 📱 Open the Phone app (the tube icon on the home screen).
• 📜 Go to the Journal tab (or Recent in English firmware).
• 👆 Find the number you want in the list and click on it to open the details.
• ⚙️ In the upper right corner, tap three points (⋮) and select Block Number (or Block).
• ✅ Confirm the action in the window that appears.

After that, the number will be automatically added to the blacklist, and all incoming calls and SMS from it will be ignored. Please note that if the contact is saved in the phone book, his name will appear in the list of blocked marked Blocked.

Is the call log open?

Did you find the right number on the list?

Are there three points to call the menu?

Confirmed the blocking effect?-->

2. Method 2: Manually add to the blacklist through settings

If you need to block a number that is not in the log (for example, you know the spam number in advance), use the MIUI system settings. This method is universal and works even on older models like the Redmi 9A.

Step-by-step:

1. Open the settings (cog icon).
2. Go to the Appendix section → Application management.
3. In the search bar, enter the phone and select the standard application.
4. Use the number lock (or block numbers).
5. Click Add number and enter it manually (e.g. +79991234567).
6. Save the changes.

The advantage of this method is the ability to add numbers without saving to contacts, and it also displays a complete list of all blocked subscribers, which can be edited (delete or unlock numbers).

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If you often receive calls from unknown numbers, turn on the option to Lock Unknown numbers in the same menu, which automatically screens out all subscribers not saved in your phone book.

Method 3: Blocking through the Security app

MIUI firmware includes the proprietary Security app, which offers advanced security features including spam blocking.This method is especially useful for owners of POCO F5 or Xiaomi 13T, where the application is integrated deeper into the system.

How to block the number through Security:

• 🛡️ Launch the Security app (shield icon).
• 📵 Go to the Blocking or Call Blocking tab.
• 🔍 Select the Black List and click Add.
• 📞 Enter the number manually or select from the log/contacts.
• ✔️ Confirm the addition.

In the same section, you can set up automatic blocking of spam calls from the Xiaomi database. To do this, activate the Block spam number switch. The function uses a cloud database that is updated daily and contains the numbers of scammers, spammers and robots.

Every day.

Several times a week

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4. Method 4: Blocking through Google Contacts

If you use a Google account to sync contacts, locked numbers will automatically be transferred to all your devices (including tablets and other smartphones).This is handy if you have multiple Xiaomi or other Android brands.

Instructions:

1. Open the Contacts (or Contacts) app.
2. Find the right contact and open your card.
3. Tap it on three points (⋮) top-right.
4. Select Lock the number.
5. Confirm the action in the dialog window.

After that, the number will be blocked not only on your Xiaomi, but also on all devices where you are logged in to the same Google account. Please note that if a contact is removed from the phone book, the lock will remain active, but you will have to manage it through the phone settings (see Method 2).

5. Method 5: Third-Party Applications for Blocking

If standard MIUI features aren’t enough (for example, you need to block mask numbers or create whitelists), you can use third-party apps.

Warning: Some apps (like Truecaller) require access to your phone book and call history, and if you are embarrassed, use them in limited mode or opt for standard MIUI tools.

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Third-party applications may be using up extra battery due to background activity. If you notice a quick discharge on the Redmi Note 11 or another model, check the power saving settings for these programs.

6 Why the lock doesn't work: common problems

Sometimes users are faced with blocked numbers continuing to call, and the reasons may be as follows:

• 🔄 Settings reset: After resetting the phone to factory settings, the blacklist is cleared. restore it manually.
• 📱 Double. SIM-Maps: On some Xiaomi models (e.g, POCO X5 Pro) the lock is only valid for the main SIM. Check the settings for each card separately.
• 🔗 Update MIUI: After major updates (for example, with the MIUI 13 on MIUI 14) some settings may reset. Update the blacklist.
• 🕵️ Hidden numbers: Numbers with a substituted Caller ID (For example, Unknown or Private Number are blocked separately – see the next section.

If the problem persists, try an alternative method of blocking (e.g., through Google Contacts instead of the standard Phone app). Also check if the phone has apps that can interfere with calls (e.g., some battery managers or optimizers).

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To check if the lock is working, ask a friend to call you from a locked number. The call should be reset after 1-2 beeps, and the log will appear marked "Blocked".

7 How to block hidden and unknown numbers

Fraudsters often use spoofing, which causes the log to display Unknown, Hidden Number or random numbers, to block such calls to Xiaomi:

1. Go to Settings → Applications → Application Management → Phone → Number Lock.
2. Activate the option to block unknown numbers.
3. (Optional) Enable Block numbers without an ID (if any).

On some firmware (e.g. MIUI 15 for the global market), these options may be called differently:

• Block unknown callers
• Block private numbers

Important: once these features are activated, all calls from hidden numbers will be blocked automatically, including legitimate ones (for example, from banks or delivery services).If you want to receive such calls, add known numbers to the whitelist through the Security settings.

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On the Chinese versions of MIUI (e.g., the Xiaomi 13 Pro for the domestic market), the option to block hidden numbers may not be available, in which case use third-party apps like Truecaller.

FAQ: Frequent questions about the blacklist on Xiaomi