How to set up call recording on Xiaomi Redmi Note 9

Xiaomi smartphone owners often face the need to save important conversations for later listening. The Redmi Note 9 has built-in functionality that allows you to capture dialogue, but in the latest versions of the MIUI shell, this process has undergone significant changes, due to the update of Google’s privacy policy, which restricts the access of applications to the microphone during a phone conversation.

In the past, users could just turn on the menu and forget about the problem, but now the system requires more fine-tuning. In some regions, the function can be completely hidden or not work properly without additional manipulation.

In this article, we will take a look at all the available recording activation methods on your device, look at the system’s standard tools, workarounds for hidden functions, and install specialized software, learn how to manage the audio archive and understand why automatic recording may not work by default.

The standard features of the MIUI shell on the Redmi Note 9

The first thing to start looking for a solution is the standard Phone app, which is pre-installed on the Redmi Note 9. Depending on the firmware version (Global, China, EEA), the interface and options available may vary. The basic functionality allows you to record conversations manually by pressing the appropriate button during the connection.

To activate automatic mode, you need to go to the application settings. Usually the path is: open Phone, click three dots or a gear in the corner of the screen, and select Call Record. Here you can add specific numbers to the automatic recording list or enable a feature for all incoming and outgoing calls.

But users often notice that once you update the system, the Auto Record slider becomes inactive or disappears altogether, not a device error, but a software limitation that's implemented at the system level to comply with the laws of different countries, and if you see a message that the feature is not available in your region, you won't be able to turn it on using standard methods.

⚠️ Attention: In new versions MIUI When the recording is turned on, the interlocutor can hear a periodic voice warning that the conversation is being recorded.

It's also important to consider where the files are stored. By default, they're in the internal memory in the folder. MIUI/sound_recorder/call_rec. Access to this directory may be restricted in newer versions of Android, so it’s better to use a built-in voice recorder or file manager with access rights to listen.

Recording problems in Android 10, 11 and later

The main reason for the difficulty in recording conversations is the change in the architecture of the Android operating system, which since version ten, Google has closed direct access to the audio stream of telephone conversations for third-party applications and even for system utilities in some cases, in order to increase cybersecurity and protect user privacy.

On the Redmi Note 9, which originally shipped with Android 10 and received upgrades to newer versions, this manifests itself in the form of quiet recordings where only you can hear, or a complete lack of sound from the interlocutor.

There are several technical workarounds that sometimes help restore performance:

• 📱 Network Mode Switching: Try temporarily changing your preferred network type in your settings SIM-map 5G/LTE on 3G/2G, record and return the settings back.
• 🔊 Hand-free use: Turning on the hands-free before recording sometimes allows the microphone to capture the speaker’s sound through the speaker, although the quality will be lower.
• 🔄 Change of region: In some cases, changing the region in your phone settings to countries where recording is allowed (such as India or Singapore) returns hidden menus.

It is worth noting that these methods are not guaranteed and depend on the specific version of the security patch installed on your device.If none of the methods worked, you will have to resort to installing third-party software.

Use of third-party applications for recording

When Xiaomi’s built-in tools are no longer meeting the needs of the user, independent applications come to the rescue, and the most popular and effective solution at the moment is Call Recorder – Cube ACR. It can bypass system limitations using special availability services (Accessibility Services).

The installation and configuration process requires care. Once you download the app from the Google Play store or the developer's official website, you will be asked to provide a number of permissions. It is critical not to miss the stage of setting up the "Cube ACR App Connector" in the Android special features menu. Without this component, recording conversations on modern versions of MIUI will not work.

Another important consideration is the choice of audio source, which is something you need to experiment with in your application settings. The Redmi Note 9 is often suited to Audio Source: Voice Communication or VoIP if the standard microphone is not capturing sound, and you may also need to turn off the "Use speaker" option inside the app itself if the sound is distorted.

⚠️ Warning: Third-party applications may conflict with system noise cancellation. If someone complains of echoes or interruptions, try changing the microphone settings in the recorder app.

You don't need to install many of these utilities at once. Having two or more programs that claim to manage calls will cause your phone to run out of steam, crash calls, and quickly drain your battery. Choose one proven solution and set it up correctly.

Automation through Scenarios

There's a useful scripting tool in the MIUI shell that allows you to create chains of action, and although you can't directly turn on a script, you can use it to prepare your phone for a conversation, for example, you can create a script that, when you plug in your headset or when you have a certain time, activates the right audio settings.

More advanced users use automation applications like Tasker or MacroDroid, which can create a macro that simulates the pressing of the recording button on the screen when an incoming call is made, and requires setting up the inbound call trigger and clicking on screen coordinates, where the recording button is located in the phone interface.

This method is difficult to debug in the initial debugging, as the location of interface elements can change, but it allows you to achieve fully automatic recording without using third-party recorders, which can be blocked by the system. USB and give the application the right to automate through ADB.

Example of commands to activate a service via ADB (computer required):

adb shell pm grant com.macrodroid.macroid android.permission.WRITE_SECURE_SETTINGS

Using these methods requires technical literacy, and an error in setting coordinates or conditions can cause the phone to perform unnecessary actions or, conversely, miss important calls.

Archive management and export of records

Once the audio fixation issue is resolved, file storage becomes a challenge; conversation recordings take up space in Redmi Note 9’s internal memory, and can grow rapidly; and it is recommended that you regularly audit the archive and delete unnecessary dialogs.

You can use a built-in Explorer to manage it. Find the Call or Record folder at the root of the internal memory. Files usually have the.mp3 or.m4a extension. To automate the space freeup process, you can configure synchronization with cloud storage, such as Google Drive or Mi Cloud.

The table below shows the main paths to records files for different methods:

When transferring files to your computer, make sure you copy them whole. Damage to the file when you copy can make it unreadable for standard players. If the file doesn't open, try using the universal VLC media player that supports most codecs.

Impact of Call Recording on Productivity

The constant operation of the recorder in the background has an impact on the resources of the smartphone. The process of encoding audio in real time involves the processor, and constant recording on flash memory can theoretically accelerate its wear, although for modern Redmi Note 9 drives this is not a critical problem.

More markedly, the impact on autonomy. Active microphone and recording prevent the processor from going into deep sleep during a conversation. If you're in a lot of long conversations with recording, battery consumption can increase by a few hours. 10-15% compared to the usual regime.

In addition, some users note that the body heats up in the area of the camera and the processor during long conversations with the recording turned on. This is a normal reaction of the system to the load. To minimize the effect, try not to run simultaneously heavy games or the navigator during an important conversation with the fixation.

⚠️ Attention: When internal memory is overflowing, the recording process can be interrupted automatically.

To optimize work, you can reduce the quality of the recording in the settings of the recorder application. Going from high quality to medium will significantly reduce the file size without significant loss of speech intelligibility, which is especially important for archiving large amounts of data.

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Use a microSD card to store your archive. In the voice recorder or third-party application settings, specify the save path to the external drive so that the internal memory of the system is not clogged.

Legal aspects and ethics of recording

The law varies from country to country on the issue of recording telephone conversations, and some jurisdictions require mandatory warning or even consent.

The use of the recordings as evidence in court also has its nuances: it is generally required that the recording be obtained legally and not violate privacy. If you plan to use audio files in official instances, consult a lawyer about their registration and storage.

Ethically, a hidden recording of a conversation with loved ones or colleagues can lead to a loss of trust. Transparency in communication is often more important than having an evidence base. Use the recording function responsibly, primarily for business negotiations, fixing service arrangements or for security purposes.

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Technically customizing the recording is only half the task, and always consider your country’s laws and ethics before using this feature.