How to disable message blocking on Xiaomi mobile phone

Xiaomi’s modern smartphones are equipped with powerful spam and unwanted contact protection systems that work at the operating system level. Sometimes these protection mechanisms become too aggressive and begin to hide important notifications from banks, delivery services or colleagues, mistakenly taking them for advertising junk. The user may not suspect for weeks that he is missing critical information, as the MIUI or HyperOS system simply silently deletes or hides such messages in a special compartment.

To regain full control of the incoming data stream, you need to understand the settings of standard Messages and Security applications in detail. In this article, we will look at all possible causes of blocking, from built-in filters to third-party antivirus modules, learn how to manage the blacklist and configure exceptions so that no important email is lost in digital noise.

Check the built-in blocker in the Security application

The first step in diagnosing the problem is to check the Security system application, which is pre-installed on all the brand devices, and this is where the central call filtering control center and the customer's headroom are located. SMS-It works independently of the main settings menu of the phone, and users often forget that they have activated Do Not Disturb mode or added a number to the blacklist through this interface.

To access the desired settings, you will need to run an application with a shield icon, usually on the home screen or in the Tools folder. Inside the interface, you need to find a section responsible for blocking unwanted content, which can be called Antispam or Lock, which displays all the statistics of blocked calls and messages, and also stores a list of numbers that are not allowed to access your device.

If you find that the messages you want have been filtered out by the system, you can recover them directly from the lock log, but to prevent a recurrence, you need to adjust the filtering rules more flexibly, disabling too strict heuristic algorithms or adding important contacts to the whitelist.

• 📱 Open the Security app on the home screen.
• 🛡️ Go to the Antispam or Block section.
• ⚙️ Click on the gear icon in the upper right corner to access settings.
• 📝 Select the Black List to view the blocked numbers.

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If you can’t find the Security app, use a search by swiping your finger down the home screen and typing the name into the search bar.

SMS filtering settings in a standard application

In addition to the system antivirus, the messaging app itself also has its own filtering settings that can override system settings. Redmi and Poco smartphone owners often find messages from unknown numbers automatically placed in the Spam or Archive folder, bypassing the main chat list, especially for devices running global firmware versions with Google integration services.

To change, you need to log directly into the dialog interface and open the menu of additional options. Depending on the version of the MIUI shell, this menu can be hidden behind three dots in the corner of the screen or caused by a long press. Here it is important to pay attention to the items related to spam protection and keyword filtering, since they are the most often cause of loss of messages.

The system allows you to create your own rules by blocking messages containing certain words or phrases. If you have ever added words like “promotion”, “credit” or “winning” to your stop-word list, any messages with such content will now be blocked automatically, even if they come from the official sender.

It is recommended to check the spam folder periodically, as confirmation codes from banking or two-factor authentication applications may be included in the folder, and disabling filtering for such services ensures that you always have access to important data in real time.

Managing a blacklist of contacts

Sometimes the problem lies not in automatic filters, but in the manual locking of specific numbers, which could be made by accident or at the time of irritation. The blacklist in Xiaomi smartphones works at a deep system level, so unlocking a contact through a regular phone directory is not enough – you need to edit the list of blocked.

To manage this list, you should go to the call settings or use the blocker menu mentioned earlier, which displays a complete list of all the numbers whose calls and SMS are ignored by the device, you can delete the numbers one by one or clear the entire list if you are sure that locking is no longer required.

It is important to note that some carriers also provide locking services on their side that are not controlled by the phone.If after clearing the blacklist on the device, messages do not come, it makes sense to contact your mobile operator's support team to check the status of Antispam services.

Disconnecting the “Do Not Disturb” and “In Flight” modes

One of the most common reasons users think messages are blocked is the activated Do Not Disturb mode, in which the phone receives messages but does not emit audible signals, vibrates or displays pop-up notifications on the screen, creating the illusion of no communication.

You can quickly check the status of this mode by opening the notification curtain with a swipe from top to bottom. If the crescent icon is illuminated, the mode is active. In this mode, you can set exceptions, for example, allow notifications from favorite contacts or repeated calls, but for full operation of SMS it is better to temporarily turn it off.

Also, make sure that you don't activate In-Flight mode, which completely shuts down all radios, and sometimes software failures occur when the antenna icon disappears, but the phone continues to show the network, in which case it helps to simply restart the device or switch back and forth.

⚠️ Warning: Do Not Disturb mode can be activated automatically on schedule. Check your automation settings to ensure your phone doesn't go quiet at night or on weekends without your knowledge.

Notification and Application Permissions settings

Modern versions of Android and MIUI shells have an aggressive energy saving policy that can “freeze” the background work of the message application. If the system seems that you have not used the SMS manager in a long time, it can limit its background activity, which means that new messages will not arrive until the moment the application opens.

To fix this, you need to go to the application settings, find Messages, and check the Notifications section. Make sure all switches are on, and activate the Important or Priority option if such an option is available, which will cause the system to prioritize notifications from that application.

Also, check the permissions of the application. It must have access to contacts, phone and, of course, SMS itself. Without the appropriate permissions, the application will not be physically able to process the incoming data stream correctly and display it to the user.

• 🔔 Go to Settings. → Annexes → All applications.
• 📩 Find the Messages app in the list.
• ⚡ Select Auto Start and turn it on.
• 🔋 In the charge saving section, select No restrictions.

Third-party applications and software conflicts

If you installed third-party programs for calls or spam protection (e.g. Truecaller, Yandex, various antiviruses), they could intercept the rights to process SMS. In Android, only one default message handler can be active, and if it is a third-party application with an error or incorrect settings, the standard application will stop receiving data.

You can check which application is assigned to the main one in the general system settings. Search by settings, type the word “default apps” or “default apps” and find the section for SMS. If it indicates a third-party application that you are not actively using, replace it with the standard “Mi Messages” or “Google Mesages”.

Also, some memory “optimizers” may force the process of processing messages, considering it background and not important, adding the necessary software to the list of exceptions to the memory cleaner will help stabilize the work.

⚠️ Note: When removing a third-party application that was the processor SMS By default, the system may temporarily stop displaying incoming messages until manually reconfiguring the main application in the settings menu.

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The main reason for blocking messages on Xiaomi is not a network failure, but aggressive settings of the built-in spam filter or energy saving mode.

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