Constant calls from spammers, scammers or intrusive telemarketers can irritate any smartphone owner. This problem is especially acute for users of Xiaomi i Redmidevices, since their operating system MIUI (and the new HyperOS) have specific algorithms for handling calls. Instead of enduring constant noise and being distracted by unnecessary conversations, it is much more effective to set up an automatic filter.
In this article we will analyze in detail all the available methods that allow block unknown numbers on your device. You'll learn how to use built-in system features that are often hidden from the eyes of the average user, as well as how to properly configure third-party solutions for maximum protection. Proper configuration of your phone will turn it into an impregnable fortress for unwanted contacts.
Before moving on to complex settings, it is worth noting that modern versions of Android have powerful filtering tools. However, in order for them to work the way you need, you need to manually activate several switches. Ignoring these steps This can lead to spam continuing to arrive, and you will lose precious time on manual cancellation.
Built-in Antispam function in MIUI and HyperOS
The first place the owner should look Redmiis the system security application. Unlike “pure” Android, the shell from Xiaomi offers deep integration of locking functions right out of the box. You don't need to download additional apps if your filtering requirements are standard. It is enough to correctly configure the existing tools.
To activate the protection, you need to open the application Security (green icon with a lightning bolt). In the menu, find the section Antispam or Blocking. This is where the main levers for controlling incoming traffic are hidden. The system allows you to create black lists, block hidden numbers and even use cloud databases of spam numbers.
Particular attention should be paid to the “Block unknown numbers” setting. In some firmware versions, this option is called “Blocking calls from unknown people.” It is important to understand: activating this function will block calls not only from spammers, but also from couriers, taxis or new clients whose numbers are not yet saved in your address book. Use this mode with caution.
- 📱 Open the "Security" application on the main screen.
- ⚙️ Go to the "Antispam" section and click on the settings gear.
- 🚫 Activate the "Block calls from unknown numbers" switch.
- 📞 Additionally, enable “Block hidden numbers” for complete silence.
After enabling these settings, the phone will automatically drop calls that do not meet your criteria. The caller will hear a beep or a message about an activity, and you won’t even see a missed notification on your screen if you have selected the appropriate hiding mode. This allows you to maintain mental balance and not be distracted from important matters.
Setting up a black list and filtering by mask
If completely blocking all unknown callers seems too radical to you, you can use a more flexible approach. Filtering by mask allows you to cut off entire ranges of numbers that are most often used for automatic calling. For example, many services call from numbers starting with certain combinations of numbers.
In the blocking settings MIUI it is possible to add rules. You can create a rule that will reject calls if the number starts with a certain code or contains a specific sequence of numbers. This is especially true for regions where spammers change the last digits of the number, leaving the prefix unchanged.
⚠️ Attention: Be careful when creating blocking masks. A mistake in one digit can result in you blocking calls from emergency services or important organizations that use similar prefixes.
A manual block list also works effectively. If you constantly get calls from the same numbers, put them on your stop list. The system Android allows you to import contacts from call history with one touch. This takes seconds, but saves you from repeated calls in the future.
☑️ Checking blocking settings
Using Do Not Disturb mode for silence
Another powerful tool that is often underestimated is the Do Not Disturbmode. Unlike simple blocking, this mode allows you to create exceptions. You can set your phone to be silent for everyone except contacts in your address book. This is ideal for night time or important meetings.
To set up exceptions, go to Settings → Sound and vibration → Do not disturb. Here you will find the “Allow calls” option. Select the "From Contacts Only" option. Now any calls from numbers that are not in your friends list will be silently ignored by the system. The screen will not light up, the phone will not vibrate.
The advantage of this method is its flexibility. You can set a schedule so that the mode turns on automatically, for example, from 23:00 to 07:00. In the morning the phone will receive all calls again. This eliminates the need to manually turn the blocking on and off every evening.
| Option | Standard mode | Do not disturb mode | Full blocking |
|---|---|---|---|
| Calls from contacts | Pass | Pass (when configured) | Blocked |
| Calls from unknown | Pass | Blocked | Blocked |
| Notifications on the screen | Yes | Hidden | Absent |
| Sound signal | Yes | Absent | Busy tone |
Use a combination of these methods to achieve the best result. For example, during the day you can rely on standard antispam, and at night turn on Do Not Disturb mode with an exception for contacts. This approach ensures a balance between accessibility and personal space.
What to do if an important number is blocked?
If you accidentally blocked an important call (for example, from a doctor or courier), the subscriber usually hears a beep or an unavailable message. You need to periodically check the blocking log in the Security application → Antispam → Blocking log. All rejected calls are saved there, and you can call back if you realize that you missed something important.
Third-party applications for advanced protection
Built-in tools are sometimes not enough, especially if spammers use spoofing technologies (number spoofing). In such cases, specialized applications from Google Playcome to the rescue. The market leaders are Truecaller, NumBuster i Kaspersky Who Calls.
These applications operate on the basis of huge cloud databases. When they call you, the number is checked on the Internet in a split second. If it is marked by other users as “Spam”, “Scammers” or “Advertising”, the phone will warn you about this or automatically drop the call. Efficiency there is a very high number of such caller IDs.
However, there is a downside to the coin. To function properly, these apps often require access to your entire phone book and call history. This raises questions for privacy. By transferring your contacts to the service cloud, you essentially help form a database that the company can use for commercial purposes.
- 🛡️ Truecaller is the largest database of numbers, but requires a lot of permissions.
- 📞 NumBuster is a good identifier with SMS filtering function.
- 🔒 Kaspersky Who Calls is reliable protection from a well-known antivirus manufacturer.
- 🚫 GetContact is popular, but is often criticized for its intrusiveness and data collection.
When installing such an application, carefully study the requested rights. If you're willing to sacrifice some privacy for absolute silence, then this is a great choice. If data security is a priority for you, it is better to limit yourself to built-in tools MIUI.
Tip: When installing caller ID, immediately go to its settings and disable contact synchronization, if such an option is available. This will reduce the risk of data leakage of your friends.
Operator services for blocking spam calls
Do not forget that Russian mobile operators also offer services to combat unwanted calls. They work at the network level, meaning the call is blocked before it even reaches your phone. This reduces the load on the smartphone's battery and processor.
Each major operator has its own service. For example, MegaFon offers the Antispam service, MTS offers Caller ID with a blocking function, Beeline offers Caller ID +, and Tele2 offers Black List. Typically, basic functionality is free or costs nominal money, but advanced functions may require a subscription.
⚠️ Attention: Terms of service, their cost and names may be changed by operators at any time. Always check the latest information in the official application of your operator or in your personal account on the website.
The main advantage of operator solutions is independence from the phone model and Android version. Even if you change Redmi to a push-button telephone, the protection will remain. Activation most often occurs through USSD commands or in the operator's application.
FAQ: Frequently asked questions about blocking
Will I see a missed call if the number is blocked?
Blocked numbers are usually not displayed in the standard call log. However, in the Security → Antispam application, a separate log is kept where all dialing attempts are recorded. You will be able to see the number, call time and date, but the call itself will not interrupt your silence.
Can emergency services get through if everyone is blocked?
Android systems and telecom operators usually have priority channels for emergency numbers (102, 103, 112). Even with the Do Not Disturb mode turned on or completely blocking unknown persons, calls from intelligence agencies usually go through. However, you should not rely on this alone - in a critical situation, the phone may be out of range or discharged.
Will the battery charge decrease if you use third-party detectors?
Yes, applications like Truecaller work in the background and constantly check the database when there is an incoming call, which can increase energy consumption by 5-10% per day. Built-in tools MIUI are better optimized and have minimal impact on autonomy.
What to do if the settings are reset after updating the firmware?
When updating HyperOS or MIUI some privacy settings may return to factory values. After each major system update, it is recommended to re-check the Anti-spam section and Do Not Disturb mode to ensure that the protection is active.
Comprehensive anti-spam protection is achieved by a combination of MIUI system settings, Do Not Disturb mode and, if necessary, operator services.
To summarize, we can say that modern Redmi provides all the necessary tools for comfortable communication. Proper use of the built-in filter Antispam in conjunction with the selective call acceptance mode allows you to completely get rid of intrusive noise. Don't be afraid to experiment with settings to find the perfect balance between accessibility and peace of mind.