Intrusive calls from spammers, ad robots, and dishonest collectors are common to almost every smartphone owner, especially for users whose numbers are in the call databases. Xiaomi and Redmi device owners are in a better position, as the MIUI shell and the new HyperOS have powerful built-in filtering tools that do not require the installation of third-party software.
However, standard settings are sometimes hidden in deep menus, and antivirus functions can work incorrectly without the correct initial configuration. In this article, we will discuss in detail all the available ways to lock a number on shaomi redmi so that you can forget about phone terrorism forever, learn how to manage blacklists, configure smart filters and use the additional features of the system for complete silence.
Use of the built-in Security application
The fastest and most reliable way to stop calls is to use a pre-installed system application. Unlike third-party utilities, it has deep access rights to the system and does not consume battery power in the background. To start work, you need to find a safety label on your desktop or in the Tools folder with a shield icon of green or blue.
Once you start the app, scroll down to the Antivirus or Blacklist section, where you can find the basic filtering functionality. The interface may vary slightly depending on the version of the MIUI 12, 13, 14 or HyperOS firmware, but the logic remains the same for all models, whether it is a budget Redmi Note or flagship Xiaomi 13.
Click on “Black List” (sometimes called “Block”). In the menu that opens, you’ll see a list of already blocked contacts and a history of blockings. To add a new number manually, tap the menu icon (three dots or gear) in the upper right corner and select “Add”.
⚠️ Note: When you add a number to the blacklist through the system application, the caller will hear a “busy” signal or short horns, and you will not receive any notification unless you set up logging.
The system offers a few flexible lock-down scenarios, so you can only ban calls from specific subscribers or turn on Quiet Hour mode, which will be active at certain times of the day, which is especially useful for those who do not want to hear the phone at night but are waiting for an important call in the morning.
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Enable the option to “Block Hidden Numbers” in the blacklist settings to cut off calls from unknown identifiers that scammers often use.
It is important to check the lock log regularly, and sometimes important numbers may be added to the list of “banned” numbers due to database errors or algorithmic false positives, and timely verification will avoid missing really significant messages.
Set up blacklist via a standard call
If you find it too long to search through the Security app, there is a more direct path. The standard call app on Xiaomi and Redmi smartphones also has built-in contact management functionality, ideal when you need to urgently block the number you just received a call from.
Open the Phone app and go to the Recent tab. Find the unwanted subscriber list. Click the "i" icon in the circle or just hold your finger to the number to call the context menu. In the action list that appears, select "Block".
The system will offer several options for action: simply block the number, block and send SMS-Notification or blacklisting with a comment, depending on your anti-spam strategy, and for particularly aggressive numbers, you can choose to block all incoming numbers.
☑️ Quick lock algorithm
Control of the blocked list is also available through the settings menu of the call itself. Click on three dots in the corner of the call screen, select Settings, and then Block inbox. Here you will see the Block Unknown Numbers switch, which is worth activating if you are only concerned about those who are not in your phone book.
It's worth noting that locking through the call and the security app syncs, so if you add a number in one way, you'll see it on the list of another, which makes it easy to manage the database of unwanted contacts from any screen.
Lockdown SMS-messages and spam
Sound calls aren't the only problem. Spam in the form of SMS-The messages can be even more annoying, as notifications often appear on the lock screen. MIUI There is a separate filter for messages that works independently of voice calls.
To set up SMS filtering, go back to the Security app. Find the section related to messages or spam. In some firmware versions, it is placed in a separate Messages app with a yellow icon. Go to the settings of this app.
Activate Spam Filter, the system will begin to analyze incoming messages and hide those that contain signs of advertising or fraud, you can add specific keywords for which messages will be automatically deleted or hidden.
| Type of filter | Description of action | Where to find out. |
|---|---|---|
| Smart filter | Automatic definition of spam based on | Message settings → Spam filter |
| Keywords | Blocking by text (e.g. “credit”) | Settings → Keywords for blocking |
| Blocking URLs | Prohibition of referenced messages | Advanced filter settings |
Keywords are a powerful tool. If you get flooded with casino or quick loans ads, add the words "casino," "credit," "winning" to the stop list. All posts containing those words will not appear in the general list.
Where do blocked SMS go?
Keep in mind that filters can be too aggressive, and check your spam folder periodically to make sure that important confirmation codes from banks or service providers are not included.
Third-party applications for spam protection
While Xiaomi’s built-in tools are quite effective, sometimes more advanced protection is required based on crowdsourcing databases (databases that are replenished by users themselves), and applications like GetContact, NumBuster or Kaspersky Who Calls are great for this purpose.
The main advantage of these programs is the ability to see how your number is recorded from other people, and to receive information about the caller before answering. If the number is marked by other users as “Spam” or “Fraudsters”, the application will automatically reset the call.
But installing third-party software has its own nuances: First, it requires broad permissions to access contacts and calls; second, it can consume more battery life, and can be installed through the official Google Play store.
Once installed, be sure to go to Settings → Apps → All applications, find the installed anτισpam and make sure it is allowed to work in the background and auto-start. Without this, the protection will stop working when the system decides to “optimize” the memory.
Many users prefer a combined approach: a built-in blacklist for known numbers and a third-party app to identify unknowns, which creates a double barrier to unwanted contacts.
Do Not Disturb as a Temporary Measure
In situations where you want complete silence, but you don't want to lock all rooms forever (for example, during a meeting, a movie or a dream), the ideal mode is Do Not Disturb. Unlike a blacklist, this mode is temporary and global.
You can activate it through the notification curtain (crescent icon) or through settings → Settings → Sound and vibration → Do not disturb. In this section, you can set the schedule so that the phone goes into quiet mode automatically at a given time.
An important feature is setting exceptions. You can allow repeat calls: if the same number rings twice within 3 minutes, the second call will pass, which ensures that you do not miss an emergency message from a loved one.
Also, you can add "Favorites" to the exceptions, even if silence mode is on, calls from mom, wife or boss (if they are added to favorites) will come with sound, which makes the mode a flexible tool for managing accessibility.
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Do Not Disturb mode does not block the number forever, but only temporarily hides notifications, skipping calls from selected contacts and repeated calls.
Use this mode wisely.Don't keep it on all the time, as you may miss important system notifications or calls from delivery services if they aren't saved in contacts.
Solving the lock problems on different versions of MIUI
Users often find that the instructions on the Internet do not match their interface, due to constant updates to the MIUI shell and the transition to HyperOS. The location of menu items can vary from version to version.
On older versions (MIUI 10-11), blacklist settings were often hidden deep in the call settings menu. In newer versions (MIUI 13-14, HyperOS), Xiaomi has put lock management into a separate app or widget in the control center. If you don't find the "Blacklist" item, search by settings.
Click on the magnifier icon at the top of the settings menu and type the word “Block” or “Blacklist.” The system will redirect you to the desired section, regardless of where it is physically located in the menu structure of your firmware version.
⚠️ Note: Global versions of firmware (Global) ROM) Some features of the Chinese versions may be missing or otherwise called. If standard methods fail to block the number, check for system updates.
In rare cases, the problem may lie in access rights. SIM-Make sure that the settings are in place. SIM-There is no limit to incoming calls from the operator, which may conflict with the phone settings.