Modern smartphones, including the popular Xiaomi Redmi 9A, provide users with a wide range of options for managing incoming calls. One of the most popular features is the so-called contact filter. This tool allows you not only to block unwanted numbers, but also flexibly adjust the scenarios of the device’s behavior when calls are received from certain categories of subscribers. Users often search for where this functionality is, since the standard interface can hide some options.
Owners of MIUI devices know that the caller system has its own features, different from pure Android. The filter in this context is not a single button, but a set of settings scattered across different menus, this is done to avoid overloading the main interface, but sometimes this logic makes it difficult to find the right parameters. In this article, we will discuss in detail all the ways to access call management.
Understanding how the Redmi 9A filtering system works will help you eliminate intrusive advertising and fraudulent calls. We will look at both the built-in system tools and the capabilities of third-party applications that can be pre-installed or downloaded separately.
Main Call Menu and Hidden Settings
The first place to go to a Xiaomi Redmi 9A user is the standard Phone app, which is where the basic functionality for working with contacts and call history is located. However, many of the filtering settings are hidden in the optional menu, which opens through a special icon, usually three dots or gears located in the upper right corner of the screen.
After going to the settings menu, you will see a list of parameters where you can control behavior. SIM-It's important to look at the lock and identification sections here, and the system filter is often integrated into this section, allowing you to quickly activate Do Not Disturb or hide incoming numbers from unknown numbers.
⚠️ Note: The interface of the application "Phone" may vary slightly depending on the firmware version MIUI, Look for items that have similar meanings if the exact name is not available.
For a more subtle setup, you should study the Antispam or Blocking subsection, which stores blacklists and filtering rules for incoming messages and calls, access to this data through Settings → Antispam, which is the key path for those who want to manually add specific numbers to the ignored list.
💡
Use the “Tag as spam” feature in your call history to automatically add similar numbers to your lock database for all security users.
Using the Security App for Filtering
In the Xiaomi ecosystem, the central element of access control is the system application Security, which is not just an antivirus, but a powerful combine that houses all the traffic and call filtering tools, and to find the contact filter on Redmi 9A, you need to run this application, which has a characteristic green icon with a shield.
Inside the app, you'll find the Antispam section, and you'll click on it and you'll be taken to the menu where you can control call locking and SMS. It's a smart filter that analyzes incoming calls based on fraudulent number databases. Autolocks work in the background without requiring user intervention.
- 📞 Blocking Unknown Numbers – Hiding Calls from People Not in Your Phone Book.
- 🚫 Blacklist – manually entering numbers that are guaranteed not to be reached.
- 📩 Message filter – weeding out advertising SMS key-word.
- 📅 Do Not Disturb – temporarily shutting down all audio notifications.
The “Block Hidden Numbers” setting is particularly noteworthy, and by activating this option, you prevent calls from people using special services to hide their ID, often avoiding intrusive polls or telemarketers.
☑️ Filter settings in the Security application
Setting up the blacklist and locking rules
For those who need maximum control, Xiaomi Redmi 9A offers advanced locking rules. They are deep in the Security app settings. Going to the Antispam settings section (the gear icon), you will see the Blacklist item, where you can not only add numbers, but also customize exceptions.
The system allows you to create complex scenarios, for example, you can configure the filter so that calls are blocked only at certain times of the day or only from numbers that are not stored in contacts, and the flexibility of the settings allows you to adapt the phone to any needs, whether it is working hours or rest.
| Setup parameter | Description of function | Recommended value |
|---|---|---|
| Lock everything down. | Total ban on incoming calls | Off. |
| Block the hidden | Rejection of calls without number determination | Included. |
| Block from blacklist | Use of a manual lock list | Included. |
| Notify the blockage | Showing Missed in the Journal | If you wish, |
It is important to check the lock log regularly to make sure that important calls have not been accidentally cut off. Sometimes telecom operators change the formats of numbers, and the old rules may not work properly, in such cases manual adjustment of the lists is required.
How to add a number to the blacklist through the magazine?
Filtering through Google Contacts and Third Party Apps
If standard MIUI tools aren’t enough, you can always take advantage of the features of Google’s Contacts app, which is often pre-installed on Redmi 9A. It has its own simpler filter. Once you go to the app’s settings, you can find the Filtered Numbers item, where the system automatically places potential spam.
In addition, users can install third-party solutions from the Google Play store, applications like Truecaller or Yandex.Number Definition offer their own databases and filtering algorithms, which can be more effective in combating modern spam than built-in tools.
When installing third-party applications, you need to give them permissions, without the right to access calls and contacts, the filter will not work, and integrating such services into the system requires careful attention to privacy settings.
- 🛡️ Truecaller – a global database of spam numbers with automatic detection.
- 🇷🇺 Yandex – effective work with Russian numbers and definition of organizations.
- 📱 Kaspersky Who Calls – Protection against fraudsters using antivirus databases.
⚠️ Note: Installing third-party number detectors means transferring your contacts to the developer server. carefully review the privacy policy before using.
Do Not Disturb as a Temporary Filter
Sometimes the user doesn't need a permanent filter, but a temporary silence, and for this, Xiaomi Redmi 9A has a "Do Not Disturb" mode, which can be activated through the notification curtain or in the audio settings, which allows you to create an exception for favorite contacts, skipping only their calls.
You can set a schedule in the mode settings, for example, the phone will automatically filter all calls (except favorites) every night from 23:00 to 07:00, which is a great way to protect your sleep from accidental or late calls.
It's important to distinguish between this mode and full lockdown. In Do Not Disturb mode, the caller hears the beeps, but your phone is silent and does not vibrate. When completely blocked, the caller immediately receives a "busy" or "unavailable" signal.
💡
Do Not Disturb mode is ideal for temporary isolation, but for constant protection against spam, it is better to use built-in Antispam.
Solving problems with the contact filter
There are times when the filter on Redmi 9A stops working correctly, calls from locked numbers can pass, or vice versa, important calls are lost. Often the reason lies in the system update or failures in the Security application.
To clear the cache, go to Settings → Apps → All Apps → Security → Memory → Clear the cache. This action won’t delete your settings, but can fix software errors. If the problem persists, it’s worth checking for system updates in the About Phone section.
Also make sure that the phone has an up-to-date version of the spam database installed. The Security app often has an Update Bases button. Updating in a timely manner is critical to effectively combating new fraud numbers.