Mobile phones have long since ceased to be a means of communication, becoming the main tool of communication, but with convenience come spam calls. Owners of Xiaomi devices often face intrusive advertising or calls from scammers, and the first solution is to find a lock function. The blacklist is a built-in mechanism that allows you to weed out unwanted calls and messages before they disturb your peace.
With the MIUI or new HyperOS operating system, Android’s contact management is flexible, but the settings menu is not always intuitive at first glance. Users can search for a separate application or hidden folder without knowing that the desired functionality is integrated directly into the standard “caller.” The exact path to settings may vary slightly depending on the firmware version and region, but the overall algorithm of actions remains the same for all models.
In this article, we will take a look at all the ways to access a blocked number list, how to effectively manage unwanted contacts, use a built-in antivirus to filter spam, and what to do if the desired number is accidentally blocked, and understanding how these tools work will help you clean up your call history from unnecessary noise.
Search for a blacklist through the standard “Phone” app
The fastest and most common way to find the desired partition is to use the standard call app, which is preinstalled on every Redmi or Poco smartphone. The caller interface contains a hidden menu where all lock options are stored.
When you start the app, look at the top right corner of the screen, which is usually the three dots or the gear icon, and clicking on that element opens the drop-down menu, where you need to select Settings or Call Settings, and that's where you're focused on managing all incoming and outgoing connections.
In the list of options that opens, you will need to find a section that can be called “Blocking”, “Blacklist” or Anti-spam. In some versions of firmware, this item is placed in a separate submenu “Antispam”, and if you go there, you will see a complete list of all the numbers that are currently blocked by the system.
Importantly, additional settings are often available in the same menu, such as blocking hidden numbers or all unknown contacts, which allows you to create maximum protection from telemarketers without requiring third-party software installation. If you don’t see the desired item, it may be hidden in the Advanced Settings section.
Access through the Security app
An alternative and more powerful lock management tool is the System Security app (green shield with lightning), which not only cleans the cache, but also contains deep network settings. To get blacklisted, run the Security app from the smartphone menu.
Inside the app, find the Antispam section**.This is all the tools for filtering SMS and calls. The interface of this section usually contains tabs for messages and calls, as well as a separate button or gear icon to manage lock settings.
The advantage of using the Security app is that you can fine-tune filters, you can activate a smart lock that uses cloud databases to identify spam numbers, which is especially true for users who don't want to manually enter every ad number.
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Regularly update spam databases in the Security app to ensure that the filter works as effectively as possible against new scams.
Also available in this section is Quiet Mode, which allows you to block calls at certain times of the day, such as at night.This does not add a number to the permanently blacklisted, but temporarily ignores any incoming signals, which can be useful for digital detox.
Instructions: How to add and delete a number
Managing the blocked contacts list involves two main actions: adding a troublemaker and deleting the number if the lock is no longer needed.The addition process can be done in several ways, and the choice depends on whether the number is in the call history or in the contacts.
If the number is in the call history or message log, the easiest way to click on it and hold your finger for 1-2 seconds. In the context menu that appears, select the option to blacklist or block. The system immediately makes changes, and calls from this number will stop coming.
To manually add a number that is not in the history, go to the blacklist menu (via Phone or Security) and click Add (usually a plus in the corner) and you will be asked to enter the number manually or select it from the phone book, which is convenient for preventive locking.
☑️ Algorithm adds numbers
To unlock the contact, you need to go back to the blacklist menu, find the number in the list, click on it (or on the basket icon / cross next to it) and confirm the removal from the lock list, and then incoming calls from this number will again pass to your phone.
Smart locking functions and filters
Modern shells MIUI and HyperOS offer not just a static list, but dynamic filters. In anti-spam settings, you can find options to block keywords in SMS. This means that the message will not reach you if the text contains a certain phrase, such as “credit” or “winning”.
Another useful feature is blocking all unknown numbers, and when activated, the phone will ignore any calls from numbers that are not saved in your address book, a radical but effective method of fighting spam, although it can lead to missing important calls from couriers or doctors.
The system also allows you to configure exceptions. You can create a whitelist, which will block contacts even in Do Not Disturb mode or when you turn on the lock of unknowns. To do this, find the corresponding tab in the blacklist menu and add trusted numbers.
How does a cloud spam database work?
Using these features requires careful attention, as settings that are too tight can isolate you from the outside world. It is recommended to periodically check the lock log to make sure that important calls were not cut off incorrectly.
Comparison of locking methods on Xiaomi
Understanding the differences between embedded tools and third-party solutions will help you choose the best protection strategy. The table below compares the basic techniques available to the Xiaomi user.
| Method | Availability | Efficiency | Impact on the battery |
|---|---|---|---|
| Blacklist on the Phone | Built-in | Tall (hand-held) | Minimum |
| Antispam in "Security" | Built-in | Very high. | Low. |
| Third-party annexes | Installation required | Depends on the base. | Medium/High |
| Operator's services | Paid/Tariff | High (network level) | Absent. |
Xiaomi’s built-in solutions are preferable because they are deeply integrated and do not require the additional permissions that third-party apps often request. In addition, system tools do not consume battery power in the background as aggressively as “heavy” antiviruses.
However, if the built-in spam number database isn’t enough, you might want to consider installing specialized apps, but do so with caution: Make sure the app has high ratings and positive reviews so as not to turn your smartphone into an advertising source.
Frequent problems and their solution
Sometimes users are faced with a situation where the added number continues to call or, conversely, blocked subscribers complain that they can not reach them, although they are not on the blacklist. SIM-map.
Check if the lock function is activated. In some cases, after updating the firmware, the settings may get lost and the blacklist switch may be deactivated. It's also worth making sure you're not in Do Not Disturb mode, which has its own filtering rules.
⚠️ Note: If you use two of these SIM-card, make sure the lock is applied to the correct slot.Settings may vary for the first and second SIM card depending on the version MIUI.
Another cause could be a crowded phone memory or the phone app cache. Try clearing the cache through the Apps menu → All Apps → Phone → Memory → Clean. This won't delete your contacts, but can fix software errors.
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The system blacklist on Xiaomi works at the telephony level, so even if the screen is turned off or the phone is locked, the call will be rejected automatically.