Owners of budget smartphones like the Xiaomi Redmi 9C often face the need to save important conversations for later analysis or as evidence.However, after upgrading the operating system to Android 11 and MIUI 12/13 shells, the standard recording mechanism was hidden or removed due to changes in Google's privacy policy.This created a situation where the feature is physically present on the system but not activated by default in the user interface.
There are several proven ways to get around these limitations and get back the ability to capture the audio stream. In this article, we will discuss not only standard methods for activating hidden functions, but also installing specialized applications that bypass system locks. It is important to understand that each method has its own characteristics of the microphone and speaker, which directly affects the quality of the final file.
We'll look at the technical details of working with the Android registry, using third-party software from reliable sources and setting up the MIUI system itself. You'll learn why in some cases the interlocutor hears an audible warning about recording and how to minimize loss of sound quality when talking through the speaker. Get ready to dive deep into the settings of your device.
Activation of a hidden function in the system caller
The most reliable and high-quality way is to activate the built-in, but hidden by the developers of the recording function. Redmi 9C smartphones use the standard Google Dialer, which, depending on the regional firmware (Global, EEA, Russia), may have different restrictions. If the call settings menu does not contain the item "Record calls", you need to change the region of the device.
To do this, go to Settings → Advanced Settings → Region. Change the current value to India, Indonesia or Singapore. After changing region, reboot your smartphone. Go to the Phone app, click three dots in the corner and select Settings. There should appear the item "Call Record".
⚠️ Warning: Change of region may affect some system applications, such as weather, news and interface recommendations. Once the recording function is activated, the region can be returned back, but in rare cases the setting may reset.
Once activated, you can set up an automatic record for all numbers or select specific contacts. Files are saved to internal memory in a folder. MIUI/sound_recorder/call_rec. The sound quality of this method is as high as possible, as it uses a direct stream of system data rather than a microphone recording.
Use of third-party recorder applications
If changing your region didn’t help or you don’t want to change your system settings, third-party apps come to the rescue. However, current versions of Android (11, 12, 13) severely restrict the access of apps to the audio stream during a call. Standard recorders often record silence or only your voice.
One of the most effective solutions is Call Recorder's Cube ACR application, which uses Accessibility Services to intercept audio, and once installed, you must give the app all the permissions you request, including access to microphone, phone and contacts.
- 📱 Install the application from a reliable source (APK-The file from the developer’s official website often works better than the version from Google Play).
- ⚙️ Enable "App Connector" in your Redmi's special features settings 9C.
- 🎙️ In the application settings, select the source of the sound "Voice Call" or experiment with other options (Mic, VoIP).
- 🔒 Add the app to the battery exception list so the system doesn't kill the recording process.
It is worth noting that recording quality can vary depending on the processor model and Android version. Some users note that for stable operation it is necessary to disable VoLTE from the carrier, since voice transmission over 4G sometimes blocks the recorder from accessing the audio channel.
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If the app is recording silence, try to turn on speaker during the call, which will cause the system to redirect the sound through the speaker, which can pick up the microphone of the application.
Set up automatic recording and exceptions
To make the recording function work, it is critical to set up the automation correctly; manually turn on the recording every time it is inconvenient and you can forget to do it in a stressful situation. Xiaomi's built-in recorder allows you to flexibly manage this process.
In the recording settings menu, select Automatic Recording. You can set the "All numbers" or "Selected numbers" rule here. The second option is more rational in terms of memory savings and privacy. You can create contact lists that you should always keep in touch with.
| Setup parameter | Description of action | Recommended value |
|---|---|---|
| Sound source | Selection of recording channel (microphone or system sound) | System sound (if available) |
| File format | Audio compression codec | MP3 or AAC (best quality) |
| Notification | Beginning sound signal | Included (law requirement) |
| Cleanup | Automatically delete old files | In 30 days. |
The.m4a or.mp3 format provides a better ratio of quality and file size compared to standard.wav. This is especially true for the Redmi 9C, which often comes with limited internal memory.
Problems with sound quality and their solution
A common problem with users is the voice of the person they're talking to, or the voice of the person they're not recording, and it's because of how Android processes audio, and in most cases, the system separates the incoming and outgoing sound, and third-party programs can't glue them together without root rights.
If you're using the built-in feature after changing region, but the sound is still bad, check the noise cancellation settings. Sometimes the aggressive noise cancellation MIUI perceives the voice of the interlocutor as background noise and trims it. Try turning off the "Sound Improvement" function in the sound and vibration settings.
⚠️ Attention: When using third-party apps, recording is often only done from a microphone, which means that if you speak quietly or in a room with an echo, the recording will be unreadable.
To improve the situation, you can try using a headset. When wired headphones are connected, the audio stream is often available for recording in higher quality. Bluetooth headsets in this regard work less stable due to the peculiarities of the transmission codecs.
Why have new versions of Android removed the call record?
Legal aspects and notice of recording
The use of the telephone recording function is regulated by the legislation of a particular country. In the Russian Federation, recording one's own conversation for personal purposes is not generally prohibited, but publication or transfer to third parties without the consent of the interlocutor may entail liability.
The Android system and the MIUI shell automatically play the "Call is being recorded" signal when recording begins, and it's impossible to remove this signal by regular means, and it's done intentionally to keep everyone in the conversation informed.
- 📜 Recording a conversation without warning may be considered a violation of the right to privacy.
- ⚖️ Using the record in court is possible, but it may require examination and confirmation of the authenticity of the file.
- 🔊 Technically, you can remove the beep signal only by modifying system files, which requires Root rights and can lead to system failure.
Keeping important information about an order or arrangement is normal, while keeping a secret record of private conversations can cause conflicts.
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Automatic audio recording notification is a system limitation of Android and cannot be disabled without deep firmware modification, which is not recommended for ordinary users.
File management and synchronization
Recorded files take up space on the disk, and on models with 32 or 64 GB of storage is running out of space. Standard record folder is on the path of Internal storage./MIUI/sound_recorder/call_rec. It is recommended to check this directory periodically.
For easy management, you can configure sync with the cloud. Xiaomi’s built-in recorder can upload files to the Mi Cloud, but the amount of free storage is limited. The alternative is to use third-party apps that can send recordings immediately after a call to Google Drive, Dropbox or Telegram.
If you use a third-party recorder, check its storage settings. Many applications allow you to set a rule: "Delete records older than 7 days" or "Save only records longer than 1 minute" to avoid filling the memory with unnecessary audio debris.