Xiaomi Black List of Contacts: How to Find and Unblock a Number

Xiaomi’s modern smartphones are equipped with powerful incoming call filtering tools that allow users to ignore unwanted calls from scammers or intrusive interlocutors. However, there are often situations where you simply forget that you have previously blocked a certain contact, and you can’t understand why a person complains about the lack of communication. In the MIUI operating system, as well as in the new HyperOS, this functionality is built deep into the system application “Phone”, which makes it not always obvious to the average user.

Lack of information about blocked numbers can lead to misunderstandings in business correspondence or personal relationships, when important messages or calls simply do not reach the recipient. To avoid such awkward situations, you need to know exactly where the list of ignored subscribers is stored and how to manage its content. In this article, we will discuss in detail all ways to check, add and delete numbers from the stop list on Xiaomi devices.

There are several ways to access these settings, from the standard call interface to the use of secret engineering codes. Understanding anti-spam will help you manage your digital hygiene effectively without blocking random people. Let's look at step-by-step instructions that will work for most current Redmi, POCO and Mi models.

Standard Search through the Phone App

The easiest and most affordable way to check if a number is blacklisted is to use the built-in functionality of the call app. Xiaomi's smartphones use either the standard Google caller or the proprietary MIUI Dialer app by default, and in both cases lock settings are in the settings menu. You need to open the Phone app, click on the three dots in the upper right corner (or menu button) and select Settings.

The list of options that opens up is a section that can be called "Blocked Numbers," "Antispam" or "Blocking." This is where the entire database of numbers that the system automatically or manually placed in the ignored is stored. The interface may vary slightly depending on the version of the shell, but the logic remains the same: all filter management is concentrated in this menu.

If you are logged in to the "Blocked Numbers" section, you will see a complete list of all contacts whose calls and SMS are now blocked by your device, and here you can not only see the number, but also find out the date of blocking, as well as the reason if it was specified. To remove the number from the list, you just click on it and select the appropriate unlock option, after which the connection with the subscriber will be restored in normal mode.

⚠️ Note: If you use third-party applications for calls (such as Truecaller or Yandex), lock settings may be located inside these programs, and not in the system menu of Xiaomi.

In this case, checking the settings of the smartphone itself will not give results, since the call is cut off before it reaches the device.

⚠️ Note: When you reset your phone to a factory setting, a list of locked numbers stored only in the device’s memory can be cleared if it’s not synced to your cloud account.

Use of the Application Security

The second key place where blocking functions are duplicated and expanded is the system application Security. This is the command center of your smartphone, where you have tools for cleaning memory, antivirus and spam protection. To get to the desired section, find the icon with a green shield on your desktop, launch the application and select the tab or the Antispam button.

Inside this section, you can find more detailed statistics and settings, and you can not only see the blocked list, but you can also adjust the filtering rules, for example, block all hidden numbers or calls from other regions, click on the gear icon or three dots in the corner of the screen to go to the anti-spam settings, where the blacklist button is located.

The advantage of using the Security app is that it often has more flexible notification settings. You can set the phone so that it doesn't respond to blacklisted calls at all (even the screen doesn't light up) or simply resets a call with a busy signal, which allows you to keep your privacy and not show CallerID that you're ignoring a particular person.

• 📱 Access to the list through the shield icon on the desktop.
• 🛡️ Possibility to set rules for unknown numbers.
• 📊 View statistics of blocked calls and messages.
• ⚙️ Deep integration with system services MIUI.

Also in this section, you can often find a Whitelist where you can add critical contacts, and the whitelist numbers will run even when you have Do Not Disturb mode on or when you have strict spam filtering, a critical feature for those waiting for an important call from a doctor, emergency services or close relatives in an emergency.

Checking through secret codes and engineering menu

For advanced users or in cases where the standard interface does not work, there are special features. USSD-One of the most effective codes for checking lock status and call settings on many Xiaomi models is ##4636##. Entering this combination in the dialer automatically opens the hidden test menu.

The menu that opens will show you the phone information, which displays the network technical and call status settings, and although there may not be a direct list of numbers (depending on the Android version), you can see if the system lock services are activated at the radio level, which helps diagnose the problem if the calls don't pass, but there is no blacklist of numbers.

##4636##

Another useful code is ##86569726## (or variations like ##86869726##), which is sometimes used to unlock hidden features or reset call settings, but it may not work on global firmware. The main method is visual check through menus, since engineering codes are primarily designed to diagnose a signal, not manage contacts.

Don't over-enter the engineering menu and change parameters that you don't know what they mean, which can cause the communications module to run in an unstable way, or the network to go missing, or you can get a wrong location, and if your goal is to just check the blacklist, limit the first two methods to the GUI.

Managing the lock in Google Contacts and Phone

Many users are switching to standard Google apps that are replacing them. MIUI-If your Xiaomi has a Google call (a blue pipe icon), the logic of the blacklisting changes. You have to open the app, click three dots in the corner, and select Settings, and then Locked Numbers».

Unlike MIUI, here, a list can sync with your Google account, which means that if you block a number on a tablet or other phone tied to the same email, it will automatically be blacklisted on your current device, creating a single ecosystem of spam protection across all devices.

To remove a number from the list in the Google app, click the cross next to the number or select Unblock. There is also a "Block Unknown Numbers" feature available, which sends all calls from numbers not saved in your phone book directly to voicemail or resets them. Be careful with this feature, as couriers or doctors can call from unfamiliar numbers.

• ☁️ Synchronization through Google account.
• 📵 Automatically locking hidden numbers.
• 🔄 The ability to manually unlock in one click.
• 📲 Unified management on all Android devices.

It's important to note that Google apps often use a cloud-based spam number database, and if you see calls getting blocked even though you haven't set up anything, it may have worked on a fraud protection algorithm, and you can check that in the call log: blocked calls are often marked with red or a corresponding icon.

Table of comparison of blocking methods

To make it easier for you to navigate the ways you manage unwanted contacts, we have prepared a summary table that will help you understand which method is best for your situation and what level of access provides.

As you can see from the table, the first two methods are the most convenient for the average user, they provide complete control of the situation without risking disruption to the system, and leave the engineering codes for cases where standard methods fail or require deep diagnostics.

Using different methods can lead to conflicts if a number is locked in one place and unlocked in another.The priority usually has a stricter rule: if a number is blacklisted in the Security app, it will be blocked, even if it is marked as a favorite in the phone book (although this is a rare exception).

Frequent problems and their solution

Often, users are faced with a situation where the number seems not to be on the blacklist, but calls do not pass, this may be due to the work of the operator who implements its own spam filters, in which case you need to contact the support of your mobile operator or check your personal account for active blocking services.

Another common problem is lock log memory overflow: If the list of ignored numbers is too large (thousands of entries), the system may start to work unstable or stop updating the list in real time, and it is recommended to periodically clean this list, deleting old and irrelevant entries.

⚠️ Warning: If the phone still doesn't get calls after unlocking the number, try restarting your phone. This will update your network settings and reset the phone app cache.

It’s also worth checking the Do Not Disturb mode settings. In Xiaomi, it can be set up to only skip calls from selected contacts, ignoring everyone else. Check the Settings path → Sound and vibration → Don’t disturb and make sure there aren’t too tight restrictions.

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Expert advice: Regularly update the databases of antivirus and anti-spam in the application Security, which allows the system to recognize new numbers of scammers and not let them come to you.

In conclusion, managing a blacklist on Xiaomi is a simple but important skill: knowing where to look for these settings will always control who can reach you. Use the power of MIUI and HyperOS to create a comfortable digital environment free of unnecessary noise.

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Check three places: Phone app, Security app and Google settings to find a locked number.