Modern Xiaomi and Redmi smartphones have powerful built-in filters that help users avoid unwanted calls from spammers or intrusive organizations. However, it often happens that you accidentally block an important contact or forget whose number was blacklisted earlier, which leads to missed important calls and misunderstandings between interlocutors.
In this article, we will take a look at all the possible ways to check locked numbers on your device, we will look at the standard tools of the MIUI shell and the new HyperOS, and we will also pay attention to hidden features that may not be obvious to the average user.
The information in the material is relevant for most models, from the budget series Redmi Note to the flagship Xiaomi 14. Proper management of the lock list will allow you to keep communication under control and not miss really important messages.
Standard Security Appendix: The Basic Method
The fastest and most reliable way to see who is blacklisted is to use the system application Security, which is where the antivirus engine and call blocker module are integrated, which manages all communication restrictions at the system level.
First, you need to find an icon on your desktop called Security and run it. Inside the interface, you need to scroll down to the Blocklist section, and clicking on it will take you to the ban control menu.
At the top of the screen, you'll see three tabs: All, Calls, and SMS, and by switching between them, you can check the locked numbers separately for voice and text messages, which is handy if you've restricted contact to just one of the formats.
Notice the button with the gear or tripod in the upper right corner, and you can see the settings of the blocker itself, where you can turn on or off the "Block Unknown Numbers" or "Do Not Disturb" mode.
⚠️ Attention: Deleting the number from the lock list in the Security app removes the ban instantly.
If you use a global firmware version, the interface may be slightly different from the Chinese version, but the logic remains the same. In some cases, advanced features may require you to log in to your Mi Account account.
Checking through the application “Phone” and “Messages”
Not all users know that you can manage your unwanted contact list directly from a caller or SMS app, which is especially useful when you need to quickly unlock your contact immediately after you talk or read your blocking notification.
In the Dialer app, click on the menu button, which is usually represented by three dots or vertical bars in the upper or lower right corner of the screen. In the drop-down list, select “Blocking Settings” or “Antispam”.
It opens up the same interface as the security app, but you're in the context of calls, and you can see the history of blocked calls, where it's marked that the call was rejected by the system, and it helps you understand whether the call came from a subscriber who's on the blacklist.
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If you don’t see the lock menu in the “bell ringer,” make sure that the Security app settings allow pop-up blocking notifications to appear.
The same is true with the Messages app, and if you go to chat settings or through the Spam and Lock menu, you can view the list of numbers that are not allowed to receive SMS, which is true for those who have been plagued by emails from banks or stores.
It’s important to note that in new versions of HyperOS, Google is actively implementing its anti-spam algorithms. Therefore, in Google’s Phone app (which is on many global models), the path can look like Settings → Spam and Lock → Locked numbers.
Settings SIM-map and operator
Users often confuse smartphone-level locking with operator services. Xiaomi also has a locking feature that is tied directly to the phone. SIM-map, although less common in the basic interface without using USSD-code.
To check the settings, go to Settings. → SIM-Select the SIM card if there are two, and additional services depending on your operator may be displayed here, such as Blacklist».
However, most often, the use of special services is required to manage the list on the operator's side. USSD-Your mobile phone is just a command input tool, or a mobile application from your mobile provider.
| Operator. | Check-in team | Addition command | Feature |
|---|---|---|---|
| MTS | *111*442# | *111*442*7*number# | Paid service |
| MegaFon | *130# | *130*number # | Activation required |
| Beeline | *110*771# | *110*771*number# | Through menu or code |
| Tele2 | *155# | *155* number # | Blacklist service |
Operator services have their advantages: the list is saved even when changing the phone or resetting to factory settings, but such services are often charged a monthly fee, as opposed to free lock at the MIUI level.
What to do if USSD-code is not working?
Third-party applications for call filtering
If Xiaomi’s standard features aren’t enough, you can use third-party apps from the Google Play Store, programs like Call Blocker, Should I Answer? or Truecaller offer advanced spam databases and flexible settings.
Once installed, it will request permission to manage calls and contacts, which is necessary so that the program can intercept an incoming call and check the number against its own database or your personal list.
In the interface of such applications, there is usually a separate tab "Blacklist" or "Blocked", where you can check the blocked numbers, see the statistics of the attacks that have been reflected, and adjust rules, for example, block all hidden numbers or numbers that begin with a certain number.
⚠️ Warning: Third-party apps require broad permissions.Be careful and choose only proven high-ranking programs to avoid handing over your contacts to third parties.
The advantage of third-party solutions is that they often update spammer databases in real time, and if a number is flagged as fraudulent by thousands of users around the world, your phone will block the call automatically, even if that number isn't on your personal list.
Hidden menus and engineering settings
For advanced users who want to access the phone’s deep settings, there are engineering menus, but be careful: changing the settings in these menus without understanding the consequences can disrupt the radio module.
To get to the engineering menu, open the Phone app and dial ##4636##. If the code works, the Testing menu will open. Select "Phone information."
You can see network and signal information here, but the direct list of locked numbers in the classic form is not usually displayed here, but you can reset the network settings here, which sometimes helps if the lock is not working properly due to a software failure.
☑️ Checking the lock settings
A safer way to find hidden settings is to search through your system settings, type the word “lock” or “spam” in the Settings search box, and the system will tell you where the switches are, even if they are hidden deep in the menu.
Remember that in different versions of Android and MIUI shells, access to hidden features may be limited, and if the code does not work, then the manufacturer has closed this access to your model or region.
Number removal and exception management
Once you have been able to check the locked numbers, it is often necessary to unlock someone, and you can do this from the same "Blocker" menu in the "Security" app.
Find the contact you want in the list, click on it (or the edit icon/triplet) and select the option to Delete or Unblock.
Also, the blocker settings have an "Exclusion" or "White List" function, and by adding a number to it, you guarantee that calls from this subscriber will always take place, even if the "Do Not Disturb" mode is turned on or the unknown is blocked.
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Regular blacklist checks are the best way to prevent missed important calls from couriers, doctors or colleagues.
For group unlocking, you can use the list editing function, which is usually called by long pressing on one of the numbers, after which you tick to select several contacts at once, which saves time if you need to clear the list as a whole.