How to block a phone number on Xiaomi Android

The modern rhythm of life dictates its rules, and the smartphone becomes not just a means of communication, but a device through which a huge flow of information passes, including unwanted. Owners of Xiaomi, Redmi and Poco devices often face intrusive calls from telemarketers, scammers or just unpleasant interlocutors. Fortunately, the Android operating system in conjunction with the shell of MIUI or HyperOS offers powerful built-in tools to filter incoming calls that do not require the installation of third-party software.

The locking process can vary depending on the firmware version and regional affiliation of your gadget, but the basic principles remain the same. Understanding how Blacklist works in the Xiaomi ecosystem will allow you to effectively weed out spam and maintain peace of mind. In this article, we will discuss in detail all available methods, from simply adding contact to prohibitions to configuring smart filters for unknown numbers.

Ignoring spam can lead not only to time loss, but also to potential financial risks if a fraudster is on the other end of the wire. Locking a number is the first and most important step to digital hygiene of your device. Below we will look at the algorithms of actions that are relevant for most modern models, including the Redmi Note and the flagship Mi series.

Using a built-in blacklist through a call log

The fastest and most obvious way to restrict access to a particular subscriber is to use the lock function directly from the call history. This method is ideal when you need to urgently lock a number after a recent unpleasant conversation or missed call. MIUI allows you to do this in literally two touches, without going into the jungle of system settings.

To perform the operation, open the standard Phone app and go to the Journal or Recent tab. Find the number you want in the list, click on it and hold your finger until the context menu appears. In the action list that appears, select the option to Lock or Blacklist. The system will immediately confirm the action, and further attempts to communicate from this number will be interrupted automatically.

An alternative path is through a contact card. If the number is saved in your phone book, open your profile. At the bottom of the screen or in the optional action menu (often indicated by three dots or an edit icon), you will find a switch or a "Block" button, activating this feature marks the contact with a special icon that signals the lock status.

• 📞 Instant lock right from the list of missed calls without going to settings.
• 🔒 The ability to unlock the number back at any time through the same menu.
• 📱 Automatic entering of the number in the system (Blacklist) shell of Android.
• 🚫 The subscriber will hear the signal “busy” or horns, depending on the operator’s settings.

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If you accidentally blocked an important number, just repeat the actions and select Unblock - the call history and SMS from this subscriber will be saved if you did not manually delete it.

It is important to note that when you block a call log, the number is added to the system blacklist, not just hidden from view, which means that even if you delete the call history, the inbox ban will remain active until it is manually canceled.

Set up a lock through the application “Security”

Xiaomi devices are famous for their pre-installed suite of utilities combined into the Security app, and this is where the most flexible settings for managing incoming traffic, including antivirus, memory cleanup and, importantly for us, call blocker, are found.

To get to the desired section, run the Security app (green icon with a shield). On the home screen, find and select Blocklist. This displays the statistics of blocked calls and messages. By clicking on the gear icon or three dots in the upper right corner, you will be taken to the settings menu where you can manage lists, set rules and view the blocking history.

In the Blacklist section, you'll see a list of all the numbers that you've been denied access to. By clicking on the Add button (usually a plus), you can manually enter your phone number, select it from contacts or from call history, and you can also use a mask lock feature to cut off entire groups of numbers that start with certain numbers.

Special attention should be paid to the section “Blocking settings” where you can set the behavior of the phone when a prohibited call arrives. You can choose whether the caller will be heard beeps, the signal is “busy” or the call will be reset instantly and silently. SMS provides the option to delete messages from blocked senders or hide them in a separate folder.

⚠️ Attention: Some carriers may charge incoming calls even when they are blocked on the device, if the beeps go on for a long time.

Using an embedded blocker is preferable to third-party applications, as it runs at a deeper system level and consumes less battery life, and it eliminates the risk of your phone book leaking through third-party services, which often happens with free number detectors.

Blocking of hidden and unknown numbers

One of the most annoying problems is spam from unknown or hidden numbers that don't show up in the determinant. In such situations, standard locking on a particular number is ineffective, because the number can change or hide every time. MIUI Offers a solution in the form of filtering by number type.

In the "Blocker" menu, go to the settings (cogs) and find "Blocking Settings" or "Rules" and here you will see options for managing calls from "Unknown numbers" and "Private numbers", activating the corresponding switch, you will prevent any subscribers who hide their ID from contacting you.

Also available is the Block All Unknown Numbers feature, which disables calls from anyone not in your phone book, a radical but very effective method of fighting spam, but beware: couriers, taxis, or important calls from new customers will also be blocked if they are not in contacts.

Using filtering by unknown numbers is especially important during periods of mass fraud attacks or intrusive telemarketing, and if you are waiting for an important call from an unknown person (for example, from a doctor or from a government agency), it is better to temporarily turn off this feature.

Managing the blocking through Google Assistant and Call Filter

In addition to Xiaomi’s tools, Android smartphones are also actively implementing features from Google that can duplicate or supplement system settings, such as Call Screening and integration with Google Assistant, which allow you to intelligently detect spam and automatically respond to it or defy it.

To activate these features, open the Phone app (Google Dialer if installed as primary, or MIUI call settings). Go to the settings menu (three dots) and select "Spam and Caller ID Protection." Make sure the switch is activated. The system will automatically flag suspicious numbers in red and can block them without you.

In some regions and some versions of Android, the Automatic Response feature is available, and the assistant can answer calls from unknown numbers by asking questions, and translate the voice dialogue into text on your smartphone screen, which allows you to understand the essence of the call without having to contact the person directly.

• 🤖 Automatic identification of fraud numbers on Google’s global database.
• 📝 Transcribing voicemail to text for quick reading.
• 🛡️ Additional layer of protection over the system blocker Xiaomi.
• 🌐 It only works with an active internet connection.

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The combination of the built-in MIUI blocker and Google filters provides maximum protection, covering the weaknesses of each method individually.

Google filters require data on incoming calls to the company’s servers for analysis, and for users who are sensitive to privacy issues, this can be an important factor in deciding whether to use cloud filtering features.

Third-party applications for extended filtering

When embedded tools are scarce or more fine-tuning is needed (such as time-of-day locking or caller geo-positioning), third-party applications come to the rescue, with Truecaller, GetContact and NumBuster leading the market, using crowdsourcing, a database that users themselves add to.

Installing an app like Truecaller gives you access to a huge database of spam numbers, and the app automatically detects an incoming call, and if the number is labeled as “Spam” or “Crackers,” it blocks it or displays a warning, which is especially effective against new numbers from scammers who have not yet made it to local databases.

However, using third-party apps has its own nuances: They require extensive permissions to access contacts and call logs, which raises questions about the privacy of your data, and they can consume more battery power by constantly working in the background and checking numbers with the server.

⚠️ Note: When installing number-defining applications, carefully read the license agreement. Often you agree to transfer your phone book to the developer's server, which can lead to the leak of contacts of your friends and colleagues.

If you still decide to use third-party software, configure it so that it does not conflict with the system blocker Xiaomi. It is better to entrust the processing of incoming to one application to avoid situations where the call is blocked twice or, conversely, passes through filters due to a conflict of priorities.

Frequent problems and ways to solve them

Despite the system's fine-tuning, users may encounter situations where the lock is not working properly, such as a blocked number continuing to dial or important calls being lost, often due to "Do Not Disturb" settings or work-related issues. SIM-map.

Check Do Not Disturb. If activated, it can override blacklist settings or block everyone but a select few. Go to Settings → Sound and Vibration → Don’t disturb and make sure the rules don’t conflict with your locking goals.

Another common problem is the double SIM-Make sure the lock is applied to the correct slot SIM. In some versions MIUI The blacklist settings can be applied globally, but the call history is kept separately. When you add a number to the lock, the system can specify which one is used for. SIM-card ban.

If the problem persists, try resetting the Phone and Security app settings. Go to Settings → Apps → All Apps, find Phone, click Clear → Clear cache (not data to keep history from going) This can fix software failures in the filtering module.