How to block a phone number on a Xiaomi Android smartphone

Constant calls from spammers, annoying debt collectors or simply unwanted acquaintances can seriously disturb your peace. Owners of smartphones based Android with shell MIUI or its new version HyperOS have powerful built-in tools to solve this problem without installing third-party applications.

Xiaomi system tools allow you not only to reject calls, but also to completely isolate the subscriber, hiding from it is a fact of blocking. In addition, flexible filter settings help to filter out entire categories of numbers, for example, from unknown identifiers or international codes.

In this article we will analyze in detail all available blocking methods, from simple actions in the call log to deep configuration of the list of prohibited contacts through the "Security" system application.

Quick blocking through the call log

The fastest way to stop calls from a specific person is to use the context menu directly in the call history. This method is ideal when you urgently need to block a number immediately after an unwanted call.

Open the standard application Phone and go to the call log tab. Find the number in the list that you want to add to black list. On Xiaomi devices, the interface may differ slightly depending on the firmware version, but the logic remains the same.

Press and hold your finger on the desired number. In the pop-up menu that appears, select the option Block or the crossed out circle icon. If such an item is not in the first menu, click on the icon i (information) or the arrow in the circle to the right of the number to open the contact card, where the block button will be available explicitly.

⚠️ Attention: After blocking, the caller will hear short beeps or a message that the subscriber is busy, depending on your carrier's settings. The call itself will not be displayed as missed.

Confirm the action in the pop-up window. Now this subscriber will not be able to reach you, and his messages (SMS) will go to a special blocking folder, without disturbing you with notifications.

Using the "Security" application to manage the list

For finer control of bans and viewing all blocked numbers, the system application Securityis best suited. This is the central hub for setting up privacy on smartphones Xiaomi, Redmi and POCO.

Launch the application Security (icon with a green shield). In the list of tools, find the section Antispam or Blacklist. It is usually located in the utilities block or on the main screen of the application.

Inside the section you will see switches for various types of blocking. Here you can manually add a number by clicking on the plus icon + in the upper corner of the screen. You will be asked to enter a phone number manually or select it from the contact book.

• 📞 Manual number entry - allows you to block any set of numbers, even if it is not saved in contacts.
• 📇 Selecting from contacts - convenient for blocking annoying friends whose numbers are already recorded in the phone book.
• 📋 Importing from the call log is a quick way to move recent callers to the ignored list.

The function smart blockingis available in the same menu. The system can automatically detect spam numbers based on cloud databases if you enable the appropriate option in the antispam settings.

Setting up rules for blocking unknown and hidden numbers

Often the problem lies not in specific people, but in the flow of calls from unknown numbers. The shell MIUI provides powerful filters that allow you to cut off entire categories of subscribers.

In the menu Antispam go to the section Settings (gear icon). Here you will find the item Call blocking. Activate the switch Block unknown numbers. This function will block calls to everyone whose numbers are not in your phone book.

An option is also available Block hidden numbers. It is useful for fighting fraudsters who use special services to replace or hide their ID. Activating this item ensures that anonymous calls will not go through.

Settings → Antispam → Settings → Call blocking

Be careful when enabling blocking of unknown numbers. You may miss an important call from a courier, doctor or employer if their number is not saved in advance. It is recommended to use this function only during periods of particularly aggressive spam.

What to do if an important call is lost?

All blocked calls and SMS are saved in a log inside the Antispam application. You can check this folder periodically to make sure you haven't missed anything critical.

Blocking messages and SMS spam

Text spam is often even more annoying than voice calls. Setting up SMS filtering on Xiaomi works on a similar principle, but has its own peculiarities of content processing.

In the same section Antispam go to the SMS blockingtab. Here you can activate intelligent filter, which analyzes the text of messages for the presence of keywords characteristic of advertising, casinos or fraudulent schemes.

You can create your own list of keywords. If a message from any subscriber contains a word from this list, it will be automatically moved to the spam folder. This is an effective way to combat mailings from different numbers.

Filtering type	Description of action	Recommendation
By keywords	Blocks messages with specified phrases (for example, "win","credit")	Add specific words that you definitely do not need
From unknown	Hide SMS from numbers not saved in contacts	Enable with caution so as not to miss codes confirmation
Black list	Full blocking of specific numbers	Ideal for targeted blocking of annoying senders

Don't forget to regularly empty the spam folder, as it can take up space in the device's memory, although it is not displayed in the main list messages.

Third-party applications for advanced protection

Although the built-in tools MIUI are very effective, sometimes more advanced ones are required protection, especially when working with international spam or specific databases. In such cases, third-party solutions come to the rescue.

A popular choice is an application Truecaller or Yandex with a number identification function. They have huge cloud databases that allow you to identify the caller even before you pick up the phone and automatically block numbers marked as spam.

When installing such applications, the system will ask for permission to access calls and contacts. This is necessary for the correct operation of the caller ID function. Once configured, you can delegate the blocking function to a third-party application through the call settings.

• 🌍 Global databases - allow you to (identify) spam from other countries.
• 🏷️ Number tags - show who is calling: "Food delivery", "Bank", "Fraudsters".
• ⚙️ Flexible scenarios - the ability to create complex blocking rules by time or day of the week.

However, remember that using third-party applications may consume more battery power and require constant Internet access to check databases.

⚠️ Attention: When transferring data to third-party services, your contacts may be uploaded to their servers to improve the overall base. Carefully read the application privacy policy before installing.

Possible problems and solutions

Sometimes users encounter a situation where the blocking setting does not work as expected. Most often, this is due to a conflict in settings or features of the telecom operator.

If the blocked number still works, check whether the blocking function is disabled in the SIM card settings. Some operators offer their own Antispam services, which may conflict with the phone settings or, conversely, duplicate them.

Also make sure that the application Security has all the necessary permissions. Go to Settings → Applications → All applications → find Security → Permissions. Make sure that access to phone and SMS is allowed.

Settings → Applications → Security → Permissions → Phone (Allow)

In rare cases, after updating the firmware, the blacklist settings may be reset. It is recommended to double-check the list of blocked numbers after a major system update Android or MIUI.

Frequently asked questions (FAQ)

Will it recognize subscriber that I blocked him?

The subscriber will not receive direct notification of blocking. However, if he calls, he will hear short beeps or an answering machine message that you are unavailable or busy. If he calls regularly and always gets rejected, this may prompt him to think about blocking.

Is it possible to block a number if it is not saved in contacts?

Yes, this is possible. You can block any number directly from the call log or manually enter it in the Security application in the Blacklist section. Saving to the phone book is not a requirement.

Where do SMS from blocked numbers go?

Messages from blocked subscribers are not deleted, but are moved to a special folder. You can find them in the "Security" application → "Antispam" → "Blocked SMS" tab. You can view them at any time or restore them.

Does blocking work if the phone is turned off?

No, blocking at the smartphone level only works when the device is turned on and online. If the phone is turned off, the call will be processed by the operator's network (will go to voicemail or be reset depending on the operator's settings), but will not be blocked programmatically by your phone.

How to unblock the number back?

Go to the "Security" application → "Antispam" → "Blacklist". Tap on the number you want to unblock and select the "Unblock" option or the trash can/cross icon to remove from the list.