Owners of Xiaomi Mi 9 smartphones often face an unexpected limitation: the standard call recording feature, familiar to budget models, may not be available depending on the firmware version. This is due to regional regulations that dictate the rules for using a microphone and storing audio files. Global versions of the MIUI shell (Global ROM) often lack the native functionality of the call recorder, while in Chinese or Indian builds it is present by default.
The Xiaomi Mi 9, released in 2019, has several ways to circumvent this limitation: You can try to change the system region, install specialized replacement apps, or reflash the device to a write-enabled version. It is important to consider that each method has its own risks and features of working with the file system. Next, we will discuss in detail all the available ways to activate this feature so that you can choose the most secure and convenient for your use scenario.
Check for hidden function in a standard application
Before you go through any complicated manipulation, make sure that the feature is actually hidden, not disabled in the settings. In some MIUI builds, recording is present, but requires manual activation through the menu. Open the standard Phone app and find the gear icon or three dots in the upper right corner. Go to Settings → Call Recording. If there is no such item, then your firmware version is software blocking access to this module.
Sometimes, simply changing the region in the basic settings of the system without flashing it. This method is secure and does not require root rights. Go to Settings → Additional settings → Region and select India, Singapore or Malaysia. After changing the region, the interface can reboot and the coveted button will appear in the call menu. However, on the Xiaomi Mi 9 with the latest security updates, this method often stops working, since Google tightly controls access to the microphone API in Android 10 and above.
If the change of region didn't work, don't despair. There are alternative ways to solve the problem that allow you to archive important negotiations. The main thing is to choose a method that does not disrupt the stability of your smartphone. In the next sections, we will consider installing third-party software that can bypass system constraints.
Use of third-party applications for recording
The most versatile solution for Xiaomi Mi 9 is to install specialized applications from the Google Play Market. The leader in this niche is the Automatic Call Recorder from Appliqato or Call Recorder - ACR. These programs use special algorithms to capture the audio stream, bypassing the standard limitations of the operating system. Once installed, you will need to provide the application with all the requested permissions, including access to the phone and microphone.
It is important to properly configure the sound source in the settings of the third-party voice recorder. Go to the settings of the application and find the item "Sound Source." For Android 9 and above, which is based on MIUI in Mi 9, the optimal choice is often the Voice Call (Audio Source) or Mic mode. Experimentally select the option in which the voices of both interlocutors are heard clearly and without echo. In some cases, you may need to turn on the speaker during the conversation for better recording quality.
⚠️ Note: When using third-party apps, Google Play Protect may mark them as potentially dangerous because they request access to personal data.
Some users have noted that after Android upgraded to version 10, the built-in security mechanisms began blocking the operation of such applications, in which case it may be necessary to disable battery optimization for a particular recorder application. → Annexes → Application management → [Your recorder] → Battery and select No Limits mode, which prevents the system from forcing the recording process to stop.
💡
For better recording quality through third-party applications, it is recommended to turn off noise reduction in the engineering menu, if such an option is available for your model.
Instructions for installing a custom recording module
For advanced users who want to return the native feature without third-party software, there is a method of installing the system plugin. This method requires the presence of SuperUser (Root) rights and the installed Magisk manager. If your Xiaomi Mi 9 is already unlocked (the bootloader is unlocked), you can install a module that forcibly activates the hidden feature in the system application “Phone”.
☑️ Preparation for installation of the system module
The installation process is as follows. First download the current one. ZIP-Module file compatible with your version MIUI. Open the Magisk Manager app, go to Modules and click the installation button from the storage or select a file from the device. After successful installation, you must perform a full reboot of the device. If everything goes well, the call menu will appear standard record button.
| Parameter | Standard annex | Third-party annex | System module |
|---|---|---|---|
| Sound quality | High (systemic) | Average (depending on settings) | High (systemic) |
| Stability | 100% | 85-90% | 95% |
| Difficulty in implementation | Low. | Low. | Tall. |
| Risk to the system | Absent. | Minimum | Medium (requires Root) |
It is worth noting that the use of custom modules can lead to the disruption of banking applications due to the operation of the safety mechanisms.In this case, additional configuration of Magisk Hide will be required, this method is suitable only for those who feel confident in the role of system administrator and understand the risks of modifying the system partition.
Customization of file storage quality and format
The quality of the recording directly affects the size of the space occupied and the intelligibility of speech. In the settings of any method you choose (standard or third-party), you can choose the coding format. For the Xiaomi Mi 9, which has ample memory, the optimal format is WAV or MP3 with a bit rate of at least 128 kbit / s. AMR format, although it takes up less space, often gives a metallic hue to the voice, which makes it difficult to identify the speaker.
It's important to organize automatic sorting and cloud backup. Record files can quickly fill up internal storage. Configure the app to automatically upload new records to Google Drive or Dropbox. In a standard MIUI recorder, this feature is built in: Settings → Call Record → Cloud Storage. For third-party applications, this item is in the Cloud or Synchronization section.
Why can the recording be interrupted?
Remember to check the records folder regularly. The default file path usually looks like MIUI/sound_recorder/call_rec Or CallRecorder at the root of internal memory. Periodic cleaning of the archive from unnecessary files will help to maintain the performance of Xiaomi Mi 9 high-level.
Solving Typical Problems and Errors
One of the most common problems is that you don't hear the voice of the person in the recording, and that's because modern versions of Android prohibit direct access to the audio stream of the link for privacy purposes. If you're experiencing this, try turning on speaker immediately after you answer the call, and that will switch the audio route to a speaker that can already be recorded through the microphone.
⚠️ Attention: When using hands-free to record, the sound quality may be impaired by extraneous noises and echoes in the room.
Another common mistake is that the recorder application doesn't start automatically. Check the permissions in Settings → Applications → Permissions → Other permissions. Make sure the check boxes are ticked against AutoStart, Background Display, and Record Sound. Without these permissions, MIUI will block the program from running until you manually open it.
If the recording function stopped working after the system update, try clearing the Phone and Contacts app cache. Go to Settings → Apps → All Apps → Phone → Memory → Clear. This action will not delete your contacts, but reset your call settings, which sometimes helps reactivate hidden functions.
💡
The most stable result on the Xiaomi Mi 9 is given by a combination: changing the region to India + using the Automatic Call Recorder app with a voice call source.
Legal aspects and ethics of recording
Using the function of recording, it is important to remember the legislation of your country. In the Russian Federation, according to Art. 138.1 of the Criminal Code, illegal trafficking of special technical means intended for secret obtaining information is prohibited. However, recording of one of its participants' own conversation is usually not considered a violation, unless this data is distributed to third parties without the consent of the interlocutor.
Always warn the person that a conversation is being recorded if you plan to use it as evidence in court or put it in public. A hidden recording can be considered a violation of privacy. Xiaomi Mi 9 provides tools, but the responsibility for using them lies solely with the owner of the device.