How to find and unlock hidden numbers on Xiaomi Redmi

Xiaomi and Redmi smartphone owners often face the need to limit unwanted calls from spammers or intrusive interlocutors. However, once blocked, users often forget who they have made the restrictions or want to check the current status of the blacklist. In the MIUI shell, ban management is not always obvious, which causes difficulties for beginners.

MIUI-based Android filters can hide not only incoming calls but also SMS messages, creating the effect of “missing” contacts. It is important to understand where this data is stored and how to properly extract it. In this article, we will discuss in detail all the available ways to view hidden numbers.

Note that menu layouts may vary slightly depending on the firmware version, but the basic logic of the security application remains the same for most models, and we will look at both standard methods through settings and hidden engineering codes that are often overlooked.

Use of the built-in Security application

The main tool for controlling calls on Xiaomi smartphones is the pre-installed system application Security. This is where all filters and lock settings are concentrated. To access the list of banned subscribers, you need to run an application with a green shield icon, which is usually located on the home screen.

Once you run the program, you need to go to the Antispam section. In some versions of MIUI, this item may be called "Blocking" or have a shield icon with a crossed-out circle. The interface may differ, but the functionality remains the same - incoming traffic management.

In the menu that opens, you should pay attention to the gear icon or the Settings button in the upper right corner of the screen. By clicking on it, you will be taken to the deep configuration menu where the blacklist is stored, and all numbers that are added manually or defined by the system as spam are displayed here.

• 🛡️ Click on the Antispam icon in the main menu of the app.
• ⚙️ Go to the Settings section through the gear in the corner.
• 📞 Select the Blacklist to view all blocked contacts.
• 🔍 Use search to quickly find a specific number in the database.

⚠️ Attention: Deleting the number from the blacklist in the "Security" application automatically removes the blocking of calls and SMS. Be careful when cleaning the base, so as not to accidentally unlock the unwanted interlocutor.

Importantly, this section not only allows you to see numbers, but also adjusts how you handle them, such as banning calls from all hidden numbers, or enabling a smart mode that relies on a cloud-based spam database, which allows you to flexibly manage access to your device.

Checking through the standard call log

An alternative and faster way to check the status of a particular subscriber is to use the standard Phone application, which is convenient when you need to quickly find out whether a particular contact is blocked without going into the system security settings.

Open the call log and find the number you're interested in. If you press long (or single, depending on the version of MIUI) on the contact number or name, the context menu will appear. In this list of options, you should look for the item Unblock or, conversely, Block.

If the menu displays the Unblock option, it means that the number is currently blacklisted, but if there is no such option, there is only "Block", then the number is clean and has no restrictions on incoming calls.

This is good for point-checking, but it doesn't give you a general idea of how many numbers are locked in the system. For a complete contact list revision, it's still best to use the first method through a security application, so you can see the full picture of the filtering.

Hidden Codes and Engineering Menu

For advanced users who have not found the right item in the graphical interface, there are special features. USSD-These commands allow you to access hidden call management functions that are not displayed in the usual settings menu.

The most universal code for checking the forwarding and lock status is the combination #002#. Entering this command in the Phone app and pressing the call button allows you to disable all types of forwarding, which sometimes helps to reset the erroneous lock settings if implemented through the operator.

However, for direct viewing of the blacklist at the system level, code ##4636## is often used. Entering this sequence opens the Testing engineering menu. Here you need to select the Phone Information item, where some firmware versions provide detailed statistics and call management.

##4636##

Remember, the engineering menu is a diagnostic tool, and changing the parameters in the Phone Information section incorrectly can lead to instability.--WIDGET:checklist:Checking the engineering menu: Enter the code in the call: ##4636##|Select Phone Information|Check the status of forwarding|Do not change unknown parameters|Back to the main menu-->

Management through settings SIM-map

Not all users know that some of the locking functions can be stored directly on the site. SIM-This is true for older Redmi models or when using specific tariff plans with the service "Anti-Definition" or "Black List" from the operator.

To check these settings, go to Settings smartphone, then select the section SIM cards and mobile networks. SIM-map and find the optional settings. This can be the call lock menu.

In this section, you can often see the option Block inbox. If it is active, calls can be blocked at the network level, and the phone will not even show a missed call. To turn off, you will need to enter a PIN2 code, which is usually provided by the carrier or is standard (often 0000 or 1234).

It is important to distinguish between device-level and network-level locks, and if a number is blocked by an operator, it may not be on the phone's blacklist, and in such cases, you should contact your mobile operator's service to check the services you have connected to.

Analysis of the "Do Not Disturb" regime

Often users confuse the blacklist with the activated Do Not Disturb mode, in which the phone can ignore calls from all but the contacts added to the exceptions, creating the illusion of locking numbers.

You can check the status of this mode through the notification curtain (swipe from top to bottom). If the crescent icon is active, then the mode is on. For a detailed check, go to Settings → Sound and vibration → Do not disturb.

Inside this menu, check the Allow Calls section, and if it selects "Favourites Only" or "Nobody," calls from normal contacts will be blocked systemically, not by locking a particular number, but by a global filter.

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Use Schedule mode in the Do Not Disturb settings so that the phone automatically turns on silence at night without requiring manual control each evening.

The difference between this mode and the blacklist is that the caller usually hears the beeps, but the caller does not hear the beep, or hears short beeps, whereas the blacklist often immediately resets the call or gives the signal "busy." Understanding this difference helps to quickly find the cause of communication problems.

Third-party applications and databases

When standard MIUI tools are not enough, users often turn to third-party solutions. Applications like Truecaller, Calls Blacklist or GetContact have their own databases and lock mechanisms that work in parallel with the system.

To find locked numbers in these applications, you need to open the corresponding app and go to its settings. Usually there is a tab called Blacklist or Locked.

Using third-party software can lead to conflicts if both system and application blockers are active at the same time, in which case the phone can behave unpredictable, skipping some calls and blocking others without apparent logic.

• 📱 Truecaller: a popular application with a cloud-based spam numbers.
• 🚫 Calls Blacklist: Lightweight Blocker with Flexible Schedule Settings.
• 🆔 GetContact: allows you to see how your number is recorded and block unwanted calls.
• ⚠️ Conflicts: It is not recommended to keep multiple blockers on at the same time.

⚠️ Note: When you install a numbering app, you are transferring your phone book to third-party servers, and be prepared for your contacts to be made available to other users of these services.

Frequent Questions and Challenges (FAQ)

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Checking your blacklist and anti-spam settings regularly is the best way to make sure you don’t lose important calls and messages from friends or delivery services.