The problem of intrusive calls from unknown or hidden numbers is especially relevant for owners of popular models such as the Xiaomi Redmi Note 8 Pro. When the screen displays the inscription “Hidden number” or “Unknown number”, this is often annoying, as such calls can hide advertising agencies, scammers or just unwanted interlocutors. Fortunately, the Android operating system in conjunction with the shell of MIUI provides powerful tools for filtering incoming communications.
In this article, we will discuss in detail how to configure the lock of hidden numbers on your device using built-in system functions and third-party solutions. MIUI, The features of the lock through SIM-Operator card and methods to help you stay calm and avoid missing really important calls from doctors or couriers.
Before you get into the technical settings, it is important to understand that completely ignoring all anonymous calls can have its risks. For example, some government agencies or large organizations can hide their number automatically. So the approach to setting up should be considered, and using Do Not Disturb mode in conjunction with the blacklist will give the best result for your particular situation.
Use of the built-in Security app in MIUI
The MIUI shell on the Redmi Note 8 Pro has one of the most advanced user protection tools of any Android smartphone, and the centerpiece of this protection is the Security System App, which combines antivirus, memory cleanup and, most importantly for us, the call lock module, and this is where the main switch allows you to sift out unwanted calls without installing additional software.
To activate the feature, you need to open the Security app (a shield and lightning icon) and find the Antispam section. Inside this menu, you have a detailed setup of filtering rules. The system allows you to flexibly manage who can reach you, and you can block not only hidden numbers, but also numbers from other regions or specific contacts that you blacklist manually.
It is important to note that the settings in MIUI may vary depending on the firmware version (Global, China, Russia).In some versions, the path to settings may differ slightly, but the logic remains the same: look for the section related to blocking calls or SMS. If you can not find the desired item, try searching inside the Security application itself by entering the “block”.
- 🔒 Open the Security app on your desktop.
- 📞 Go to the Antispam section and click on the settings gear.
- 🚫 Select the Block Calls option and activate the “Block Hidden Numbers” switch».
- 📝 If necessary, add specific contacts to the blacklist manually through the contact menu.
Once activated, all incoming calls, where the number detector does not transmit subscriber data, will be automatically reset, the caller will hear the "busy" signal, and you will not even see the missed call unless you turn on the lock log, which allows you to keep the call list clean and not be distracted by noise.
☑️ Set up built-in anti-spam
Blocking through Android call settings
In addition to Xiaomi’s proprietary shell, Android itself also has basic filtering mechanisms that work at the telephony level and can be useful if the system application “Security” for some reason is not working correctly or was removed by the user. The standard Google Phone call interface (which is often used in global versions of Redmi) or native MIUI Dialer has its own privacy settings.
To access these settings, open the Phone app (green handset) and go to the menu, which is usually called by clicking three dots in the corner of the screen or the “More” button. Here we are interested in Settings, and inside it is the “Block Numbers” section. The interface may differ, but the essence remains the same: search for an option associated with hidden identifiers.
Note that standard Android tools are sometimes less flexible than MIUI solutions. For example, they may not allow you to block hidden numbers, but only offer blocking of Unknowns (those that are not in contacts). Carefully read the descriptions of menu items, so as not to accidentally block calls from a pizza restaurant or taxi, the numbers of which are not yet saved in your phone book.
⚠️ Note: When you activate Unknown Numbers in your standard Android settings, you risk missing calls from couriers, doctors or colleagues whose numbers are not in contact. Use this feature with caution, preferring a spot lock on Hidden IDs.
If you don’t have a direct hidden number lock option on your menu, it could mean that the smartphone manufacturer or carrier has limited this feature at the software level, in which case it’s worth turning to USSD codes or third-party applications, which we’ll discuss below. However, for most Redmi Note 8 Pro users, embedded tools are quite enough.
Service codes and USSD-commands of the operator
The most reliable way to lock, which works regardless of your smartphone model (Xiaomi, Samsung or any other) and the version of Android, is the services of the operator itself. Big Four operators (MTS, Beeline, MegaFon, Tele2) and virtual operators provide services to identify and lock hidden numbers at the network level, which means that the call simply will not reach your device.
These services are usually used to activate USSD-For example, some operators have an Anti-Definition service that hides your number, but there are also services to combat incoming spam, activation is instantaneous, and settings are saved even when you change. SIM-card.
Below is a table with approximate codes and service names of popular operators that can help in the fight against hidden numbers. Please note that the terms of charging and availability of services can vary, so it is always better to check the current information in your personal account or by code *111# (or similar for your operator).
| Operator. | Name of service | Exemplary activation code | Cost |
|---|---|---|---|
| MTS | Number detector / Antispam | *111*8# (service menu) | Paid/Tariff |
| Beeline | Number-defining | *110*091# | Paid. |
| MegaFon | Anti-AHC/Secrecy | Personal office | Paid. |
| Tele2 | Number-defining | *155*611# | Paid. |
Network services have one undeniable advantage: they do not consume the battery of your Redmi Note 8 Pro and do not load the processor, since filtering occurs on the operator's server side. However, most of these services have to pay a monthly subscription fee, which may not be advisable if calls are rarely received.
Third-party applications for call filtering
If MIUI and the operator’s services don’t suit you, the Google Play Store’s dedicated apps come to the rescue, with Truecaller, Kaspersky Who Calls and Yandex.Phone leading the niche, and these apps have huge databases of numbers that are replenished by users themselves, allowing you to identify even numbers that are not hidden but are labeled as “Spam” or “Ads.”
Truecaller is one of the most powerful tools, and it not only identifies the number, but it also allows you to create complex lock rules, and you can set up automatic resets of all calls from numbers identified as "Hidden" or "Private," but it's worth remembering that these applications require broad permissions, including access to all contacts and a call log.
Installing a third-party blocker on Android requires additional steps to work properly. Android, taking care of security, does not allow applications to simply manage calls. You will need to manually allow the application to work in the background so that it does not “fall asleep” and miss calls, and assign it to the main dialing application, if necessary.
- 📲 Download the app (for example, Truecaller or Yandex.Phone) from Google Play.
- ⚙️ When you first start, provide all requested permissions to access contacts and calls.
- 🛡️ Go to the application settings and activate the function of blocking hidden / private numbers.
- 🔋 In the battery settings MIUI Find the application and select No Limits mode so that the system does not close it.
Using third-party solutions makes your smartphone smarter, but also makes it more “transparent” to app developers. Number databases may contain personal information, so carefully read the privacy policy of the selected service before installing.
Data security in determining applications
The “Do Not Disturb” Regime as a Radical Measure
In situations where the number of calls from hidden numbers becomes unbearable (for example, during the period of active collectors or aggressive marketing), you can use Do Not Disturb mode. This is an Android system feature that allows you to completely drown out all sounds and vibrations, and also to reject calls except those marked as favorites.
Setting up this mode on the Redmi Note 8 Pro allows you to create flexible rules. You can set up automatic mode activation at a certain time or turn it on manually. The main advantage is the ability to create a whitelist (favorite contacts) from which calls will take place even in silence. Everyone else, including hidden numbers, will be blocked or simply will not make a sound.
To activate, go to Settings → Sound and Vibration → Don’t Disturb. You can set exceptions here: allow contact-only calls or repeat calls (if the same number rings twice in 15 minutes, the second call will pass, which is convenient in case of an emergency), This is a softer but more effective way of insulating from noise.
⚠️ Note: In Do Not Disturb mode, you may miss a really important call from an unfamiliar number (such as an emergency doctor or a school teacher). Always leave the option of repeat calls, or add important institutions to exceptions if your version supports such a feature. MIUI.
It's a good way to be versatile: it doesn't require any application installation and it works in a stable way, but it blocks everything, so it requires discipline from the user to remember to turn off the mode when it's no longer needed.
💡
Do Not Disturb mode is not just a silent mode, but a full-fledged filter that can completely replace the blacklist if you properly configure exceptions for selected contacts.
Frequently Asked Questions (FAQ)
Can I block a hidden number without installing apps on Xiaomi?
Will the caller see that his number is blocked?
Why is there no hidden number lock on my Redmi Note 8 Pro?
Does the Blacklist block calls from unknown numbers?
To sum up, the Xiaomi Redmi Note 8 Pro provides all the necessary tools for comfortable communication.By combining built-in protection, operator settings and, if necessary, third-party software, you can completely protect yourself from intrusive calls from unknown numbers.