Xiaomi’s Redmi line of smartphones are equipped with powerful built-in functionality to filter unwanted calls, which is especially important in the face of increased phone fraud. Redmi 9 users often face a situation where an important call does not arrive, and the subscriber hears a beep or reset, without knowing the reason for the silence. MIUI.
The main difficulty is that the menu interface may differ depending on the firmware version and the region for which the device is released. The blacklist in Xiaomi is not always obvious to the beginner, since it is hidden behind several layers of nesting of antivirus and filtering settings. In this article, we will discuss in detail all ways to access the list of blocked subscribers and how to manage them.
It is important to understand that blocking can occur not only at your direct direction, but also thanks to the operation of automatic algorithms that flag spam. On Redmi 9 with global firmware, the path to settings may differ from the Chinese version of MIUI, where the functionality is expanded. We will look at universal methods suitable for most configurations so that you can quickly restore communication with the right people or, conversely, reliably close access to intrusive callers.
Using the Security App to Find Blocks
The central element of call management in the Xiaomi ecosystem is the system utility "Security". This is where the main functionality of the anti-ispam filter, which is responsible for screening out unwanted contacts, resides. To get to the desired menu, you need to find a green shield ikon on your desktop or in the Tools folder and run it. After opening the application, pay attention to the top of the screen where the tabs or icons of additional functions are located.
You'll need to find a section that might be called "Antispam" or have a corresponding ban shield icon. In some versions of MIUI, this item is put into a separate "Settings" menu inside the security application itself, which can confuse the inexperienced user. If you don't see the right item on the Home Security screen, try scrolling down the tool list or clicking on the three dots in the upper right corner to expand the menu.
Once you log in to the anti-spam section, you'll see a control panel that displays the statistics of blocked calls and messages, and there's a "Black List" or "Blocked" button, clicking on which will display a full list of restricted numbers on your device, and this list stores all contacts that you have manually blocked or that have been added automatically using the spam database.
⚠️ Warning: Deleting the number from the blacklist in the Security app automatically removes all call restrictions and SMS, So act cautiously if you have deliberately blocked a particular person.
To fine-tune the filter, you can also have lock options in this section, so you can choose whether to block only calls, only messages, or all at once, and you can set up the system response, either to reset a full call or send a busy signal, and these settings affect what the caller will see, so changing them requires understanding the consequences.
Access to the blacklist through the app “Phone”
An alternative and often faster way to check blocked contacts is to use a standard call app. Redmi 9 uses either a standard Google Dialer or a proprietary MIUI Dialer, and the settings are arranged differently. To start, open the Phone app you normally make calls through, and notice the three dots or gear icon in the corner of the screen.
Click on the menu, select Settings, and then find the Lock or Locked Numbers section. In the Google Dialer interface, this path looks like Settings → Locked Numbers. This displays a list of all the contacts that are not allowed to enter, and you can add a new number manually or unlock an existing one with a simple switch of the toe.
If you use a Xiaomi branded call, the logic may be a little different: after entering the settings, select “Antispam”, and then the already familiar filtering menu described in the previous section will open. Synchronization between these menus usually occurs instantly: adding a number to the lock via “Phone”, you will see it in the application “Security”.
The same section often includes the “Block Unknown Numbers” feature, which automatically screens out all subscribers not saved in your phone book, a radical but effective method of combating cold calls, but it can lead to the skipping of important calls from couriers or delivery services whose numbers are not yet recorded in the contacts.
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Periodically check the blocked call log in the Security app to make sure that important numbers from banks or taxi services do not get there.
Checking settings SIM-card-and-operator
Sometimes Redmi 9 users mistakenly believe that the lock is configured in the phone, while the restriction is set on the carrier side.Mobile operators offer Blacklist or Anti-Definition services that work regardless of the smartphone settings. To make sure that this is not the problem, you need to enter your operator’s personal account or use the USSD-team.
For example, checks for blocking services often use commands such as *110*001# or similar, specific to your region and provider. If the service is active, the list of blocked subscribers will be stored on the operator's server, and no manipulation of the MIUI menu will allow you to see these numbers or unlock them via the phone.
It is also worth checking the settings of the SIM-maps in the smartphone menu. Go to Settings → SIM-maps and mobile networks and select the card you use. Additional operator services may be available here, including forwarding or hiding numbers. Although this rarely affects incoming locks, eliminating this factor is necessary to fully diagnose the problem.
The table below gives examples of popular commands to check locking services from major operators (the relevance of commands may change, check with the operator):
| Operator. | Status check | Disconnection of service | Type of service |
|---|---|---|---|
| MTS | *110*001# | *110*000# | Blacklist |
| Beeline | *110*090# | *110*091# | Blacklist |
| Megaphone | *050*0# | *050*00# | Blacklist |
| Tele2 | *050# | *050*0# | Blacklist |
What to do if the team is not working?
Managing Blocks Through Google Contacts
Because Redmi 9 runs on Android, sync with your Google account plays a key role in organizing your phone book. The lock done through Google’s Contacts app will also work at the system level. Open the Contacts app (a yellow or blue icon with a person’s silhouette), find the right contact in the list, or search.
When you open your contact card, look at the three dots in the top right corner, and the drop-down menu should have a tick or block item, and if the contact is already blocked, the "Unblock" option will be used instead. This method is convenient because the lock is tied to the contact itself, and not to the number, which is relevant when changing the device. SIM-card or reset phone settings with saving account.
In addition, the Contacts app itself (via the left hamburger menu or three dots) has a Blocked Numbers section, which compiles a single list of all restrictions, including those added through the Xiaomi system filter and through Google, making list management the most transparent and user-friendly.
It is important to note that when you delete a contact from your phone book, it may disappear from the lock list if the lock was tied to the contact record, not the clean number. So before removing suspicious subscribers from your phone’s memory, make sure that they do not remain on the blacklist as a digital value.
☑️ Checking the contact lock
Third-party applications for call filtering
If MIUI is not enough, Redmi 9 users often turn to third-party solutions from Google Play. Apps like Truecaller, Call Blocker or Should I Answer have their own spam databases and more flexible lock settings, but when they use the list of blocked contacts moves from the system menu to the interface of the application itself.
To find the locks in this case, you need to open the installed filter application and find the section “Blacklist” or “Block”. Xiaomi system settings may not display numbers blocked by third-party software, since the interception of the call occurs at a deeper level or in parallel with the system. This creates confusion: the user searches for a number in the phone, and he “hangs” in the application.
Using third-party software requires broad permissions, including access to all calls and messages. Privacy can be compromised in such cases, as number databases are often formed by collecting data from users.
If you decide to abandon a third-party application, remember not only to delete it, but also to check if the numbers in its internal blacklist before uninstallation. Otherwise, after removing the program, the lock can be removed automatically, or, conversely, the numbers can “hang” in the system filter if synchronization occurs.
⚠️ Note: Simultaneous use of the built-in filter MIUI A third-party application can lead to conflicts where the call is blocked twice or, conversely, passes through both filters due to a priority error.
Specifics of the “Do Not Disturb” regime
Redmi 9 users often confuse the contact lock with Do Not Disturb mode, which does not block a blacklisted number, but simply does not make sounds or vibrate when a call is made, creating the illusion of locking, and you can check the status of this mode by hanging the notification curtain from top to bottom and finding the crescent icon.
In the Do Not Disturb settings (Settings → Sound and Vibration → Do Not Disturb), you can set exceptions, such as allowing calls only from selected contacts or repeat calls from one number within minutes, and if you don't have a call from a particular person, it may not be allowed, although it's not formally blocked.
It's also worth checking the schedule of this mode. Your Redmi 9 may have an automatic "Do Not Disturb" turn on at night or on weekends, and you just don't notice it. Unlike the blacklist, it doesn't put the number on any ban lists, it changes the behavioral response of the device.
For a quick diagnosis, try to switch your phone to flight mode and back, or temporarily turn off Do Not Disturb and ask the person to call back, which will help determine whether the cause of the phone's silence is software locking the number or just setting up a sound profile.
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Do Not Disturb mode hides notifications but does not blacklist the number, so a missed call can be displayed in the call log, unlike a blocked call.