Owners of Xiaomi, Redmi and Poco smartphones often face the need to limit unwanted calls or messages. built-in tools of the MIUI shell can effectively block spam and intrusive subscribers, but sometimes the opposite situation arises: you need to urgently remember who is on the blacklist, or check whether there is no important contact.
The search for such records is not always obvious, as the system hides them deep in system settings or specialized security applications. Unlike standard Android, where the lock list is often integrated directly into the phone book, the Xiaomi ecosystem takes a more sophisticated approach, separating the lock at the level of the phone. SIM-map, operator and device itself.
In this article, we will take a look at all possible locations where blocked subscriber data can be stored, learn how to distinguish between system limitations and application settings, and how to manage this list correctly so you don’t miss a really important call.
Search for blocked contacts through a standard call
The most obvious and quick way to check the lock list is to use the built-in call app. Most modern Xiaomi models have either a standard Google Phone or a proprietary MIUI Dialer preinstalled. The algorithm for actions in them is similar, but the menu layout may vary depending on the version of the operating system.
To start, open the Phone app and look at the three dots or menu icon, usually located at the top right of the screen. When you click on it, you'll see a drop-down list of options. You'll need to find Settings or Blocked numbers. In some versions of the firmware, this item is displayed separately and marked with a ban icon.
Inside this menu, you'll see a complete list of numbers that the system automatically rejects when you call in, and you can add a new contact manually or delete an old one, and it's important to understand that the lock on this menu only applies to voice calls unless otherwise indicated.
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If you don’t see the numbers on the list but the calls don’t go through, check if Do Not Disturb or Air Mode mode is activated, which can simulate a lockdown.
It is worth noting that in the new versions of MIUI based on Android 11-14, Google has limited access to third-party applications to the call log, so it is better to manage locks through a native call, rather than through third-party directories.
Using the Security app to manage locks
A unique feature of Xiaomi smartphones is the presence of a powerful system application Security (Security). This is not just an antivirus, but a whole harvester to optimize the operation of the device, which takes on the functions of call filtering and SMS. This is often where settings that overlap the standard parameters of the call.
To get to the desired section, look for the icon with a green shield on your desktop or in the Tools folder. When you launch the application, scroll down to the Antispam block. When you click on it, you will be taken to the lock control menu, where the system offers more flexible settings, including blocking keywords in SMS or hiding notifications.
- 📱 Blacklist: This is where numbers are stored, hand-added by the user for complete isolation.
- 🚫 Blocking Unknowns: Option to prevent calls from numbers not in your phone book.
- 💬 Filter SMS: The section where you can see messages from blocked senders who did not get into the main inbox.
Inside the Blacklist, you'll see the Add button and a list of existing restrictions, and the MIUI feature is that you can set up a lock schedule or enable a smart mode that detects spam by analyzing the complaint database of other users.
Please note that if you have blocked a contact through the Security app, it may not appear in the standard list of blocked calls, as the priority of processing is the system protection module.
Verification SIM-maps and operator services
Do not forget that the lock can occur not at the level of a smartphone, but on the side of the cellular operator or the mobile operator itself. SIM-Old cards. SIM-The cards had their own memory to store the blacklist, and some users still use this feature, forgetting about it.
Check if the number is locked at the level SIM, You have to go into the call settings. The path can look like the settings. → SIM-maps and mobile networks → Call locking. The system will request. PIN2 The code (often 0000 or 1234 if you haven’t changed it) will show the lock status.
| Type of lockdown | Where it's checked. | Impact on calls |
|---|---|---|
| Locking incoming | SIM settings / Operator | Caller hears 'busy' |
| Blocking outbound | SIM settings / Operator | You can't call. |
| MIUI blacklist | Security Annex | The caller hears the beeps, you have silence. |
| Do Not Disturb mode | Notification panel | Sound is off, call is displayed |
And many operators also offer services like Antispam or Parental Control, which work independently of your phone, and if you change your smartphone and the lock is still there, it's probably activated in the operator's personal account or through the phone. USSD-team.
How to find out the SIM unlock code?
To manage the services of the operator, the easiest way to use the proprietary application of your provider (for example, “My MTS”, “My Beeline”, etc.) There is always a paragraph in the “Services” or “Tariff” section that is responsible for blocking unwanted numbers.
Blocking in messengers and third-party applications
Modern communication has long gone beyond normal calls, and if you're looking for a locked number on Xiaomi, but it's Viber, WhatsApp, or Telegram, you're looking inside the apps themselves. System locking doesn't always apply to Internet calls.
On WhatsApp, the way to set up is to open the app, click three dots in the corner, select Settings → Privacy → Locked. Here you will see a list of contacts who can’t text or call you through this messenger. A similar algorithm works on Viber: More → Settings → Privacy → Blacklist.
Xiaomi’s peculiarity is that the system can restrict the background work of messengers, which creates the illusion of blocking. If messages do not come, check not only the blacklist, but also the battery settings for a particular application.
- 🔒 Telegram: Settings → Confidentiality → Blocked users.
- 📞 Viber: More → Settings → Confidentiality → Blacklist.
- 💬 WhatsApp: Settings → Confidentiality → Blocked.
These lists sync with your account, not your device, so when you change your phone, the lock will remain if you sign in to the same account.
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The locking in messengers is independent of the system locking of the phone, you need to check each application separately.
Third-party applications and their databases
Many users install additional number determinants, such as GetContact, NumBuster or Yandex. These applications often have their own databases of locked numbers that run on top of the system. If standard methods do not find the right contact, it is worth looking into these programs.
In such applications, the lock is usually located in the user profile or in a separate menu called “Blacklist” or “Block”, the feature of such services is that they can block entire categories of numbers (for example, “telelemarketing” or “spam”), based on the labels that other users put.
If you've ever given these applications access to call management, they could have taken control of incoming calls, so deleting the number from Xiaomi's system ledger won't unlock it, but you'll have to go to the settings of the detector app itself.
⚠️ Warning: Be careful when granting access rights to third-party applications.Some may be transferring your phone book to their servers, posing privacy risks.
To check access rights, go to Settings → Apps → Access Rights → Phone. See which apps have permission to handle calls, and check their internal settings, which will help identify hidden filters that you may have forgotten about.
Frequent problems and ways to solve them
Even after finding a list of blocked numbers, Xiaomi users sometimes face technical difficulties, such as not being removed from the list, or the lock continues to operate after deleting, often involving data caching or synchronization with the Mi Cloud cloud.
If you have deleted a number from the blacklist but calls still don't go through, try rebooting the device. This will update the system telephony services. It's also worth checking if Do Not Disturb mode with the "Favorites Only" setting is enabled, which may ignore your changes to the blacklist.
☑️ Diagnostics of blockage problems
In some cases, cleaning up the phone and contact data helps. Go to Settings → Apps → All apps → Phone → Memory → Clean. This won’t delete your contacts, but it will reset your call settings and lock lists to factory values, which often solves software glitches.
⚠️ Before clearing your application data, make sure your contacts are saved to your Google account or on your website. SIM-map to avoid losing them.
It is also worth considering that on two-sym Xiaomi lock settings can be individual for each SIM-Check if the lock is activated for the second SIM if you use it for important calls.