Modern smartphones, including popular models of the Redmi line, are becoming a central communication hub where every call can contain important business information or valuable personal moments. Owners of the Xiaomi Redmi 9 Pro device often wonder how to effectively manage audio recordings of incoming and outgoing calls without resorting to third-party applications. The standard shell MIUI offers powerful built-in tools that allow you to capture dialogues with high sound quality.
However, despite the availability of functionality, many users do not know where exactly the necessary switches in the settings menu are hidden. The system interface may not be obvious to the beginner, and hidden folders in the file system create the illusion of no records. Properly configuring automatic recording eliminates the need to manually turn on the recorder during a conversation, which is especially important in stressful situations.
In this guide, we will go into detail about the entire process, from activating a function in system settings to finding stored files in the device memory. You will learn about the nuances of MIUI operation that affect the availability of the option depending on the firmware region. In addition, we will look at how to listen to the archive and convert formats if the standard player refuses to play the file.
Activation of the built-in call recording function
The first step to organizing conversation archiving is to enable the appropriate option in the system application Phone. Unlike older versions of Android, which required third-party utilities, Redmi 9 Pro has native support for this feature. To begin, open the standard “ringer” application with a green handset, which is usually located in the bottom row of the desktop.
In the interface that opens, you can look at the top of the screen, where the contact tabs and call history are located. On the top right, there's a three-dot icon or a gear that represents the settings menu. You click on it, you'll be taken to the configuration section where you want to find "Call Record," and that's where the key switch that activates the voice recorder's functionality is hidden.
Once you log in to the record menu, you'll see a window with a few important options, where you can set up automatic entry for all numbers or select contacts from the phone book, and you can flexibly manage this process by creating exceptions for unnecessary dialogs, such as delivery services or spam numbers.
It is important to note that in some regions where strict privacy laws are in place (e.g. EU countries), this option may be hidden by developers. If you don't see the entry menu, your region may be incorrectly set in the system settings. Changing the region to Singapore or Indonesia often returns access to the system recording features without having to flash the device.
⚠️ Note: When you turn on automatic recording, the system can play an audible notification to the interlocutor that the conversation is being recorded, this depends on the selected country in the settings and version. MIUI.
For maximum convenience, you should immediately adjust the recording quality settings. From the recording settings menu, select the option “Sound Quality” and set the “High” value. This will provide better speech intelligibility, although it will take up a little more space in the device’s memory. The default save format is.m4a or.3gp, which is the standard for mobile platforms.
Set up automatic recording and exceptions
Manually turning on the recorder during each conversation is uncomfortable and often leads to important information being lost due to user forgetfulness. Auto Recording solves this problem by starting recording the sound immediately after the connection. In the recording settings menu on Xiaomi Redmi 9 Pro, activate the Automatic Call Recording Toggle.
The system offers two modes of operation: record all calls or record only selected numbers. The first option is suitable for those who want to have a complete archive of communication. The second option is more economical and selective. To add numbers for automatic recording, go to "Selected numbers" and check the desired contacts from the phone book or enter numbers manually.
Special attention should be paid to setting up notifications. In some versions of the MIUI shell, you can turn off the audio signal that alerts you to the beginning of recording. However, many countries require mandatory warning of the second party, so completely turning off the sound may be unavailable or unethical in business communication.
To manage the exception list, use the built-in sorting functionality, you can create a group of contacts that will not be recorded, which is relevant for face-to-face conversations that do not require documentation, which helps save memory space and structure the archive, leaving only the really important dialogues.
☑️ Set up automation
Search and listen to saved files
Once conversations have started to be recorded, the question arises: Where to find these files? Unlike voice recordings, call files are often hidden from public access in the standard gallery. The best way to find records on Redmi 9 Pro is to use the built-in Explorer or File Manager app.
Follow the following path in the file system: Internal drive → MIUI → sound_recorder → call_rec. This is the folder that stores all the audio recordings of phone calls, and the files are usually given the date and time of the call, which makes it easier to find the right dialogue. call_rec, Check if the recording function is enabled and if at least one test call has taken place.
You can listen to the file directly in the conductor by clicking on it. However, the built-in player may not support some codecs or have limited equalizer functionality. For more comfortable listening, it is recommended to install a third-party audio player, such as VLC or MX Player, which work well with mobile audio formats.
If you need to find a specific conversation through a call history, it's also possible. Open a call log, find the number you want, and click on it. If you've been recording, you can have a voice recorder icon or a Listen button next to the number or in the details of the call, and that's the fastest way to access audio without wandering through folders.
Why is the file empty?
Table of formats and data storage
Understanding the structure of files helps you manage your conversation archive more effectively, and different formats have their advantages in terms of quality and compatibility. Below is a table describing the main parameters of audio storage on Xiaomi devices.
| Parameter | Description | Location. |
|---|---|---|
| File format | .m4a (AAC) or.3gp | Internal memory. |
| The way to the folder | /MIUI/sound_recorder/call_rec | Root directory |
| Quality. | Depends on the setting (low/high) | Customized in the menu |
| Name | MGYYMDD CCMMSS Number | Automatically. |
Using the.m4a format is preferable, as it provides better quality with a smaller file size compared to the old.3gp standard. However, if you plan to transfer recordings to very old devices or specific recorders,.3gp compatibility may be higher.
The amount of space you take depends on the length of the conversation and the quality you choose. One minute of high-quality conversation can take up about 15-20 KB, which is negligible for modern memory volumes. However, with dozens of calls being recorded daily, the archive can grow to several gigabytes per year, so periodic cleaning or transfer to the cloud is necessary.
Use of third-party applications for recording
In situations where the built-in tools Xiaomi Redmi 9 Pro do not meet the user’s requirements (for example, you need to record through messengers or hidden recording), you have to turn to third-party software. Google Play Store offers many solutions, but be careful: many of them contain advertising or require unnecessary permissions.
Popular apps like Call Recorder - ACR or Cube Call Recorder ACR often require complex setup on new versions of Android due to security limitations. Starting with Android 9 and up, Google has banned apps from directly capturing audio streams during a call, leading to silence in recording or the need to turn on hands-free.
To run such applications on MIUI, you need to give them all possible permissions, including access to the microphone, phone and storage, and it is also recommended to turn off battery savings for a particular recorder application so that the system does not “kill” the recording process in the background, which is critical for stable operation.
- 📱 Call Recorder - ACR: A powerful tool with cloud storage support and flexible writing rules, but requires fine-tuning to the data. MIUI.
- 🎙️ Cube Call Recorder: Supports VoIP (Viber, WhatsApp, Telegram) call recording, but Redmi 9 Pro can run unstable without any other devices. ROOT-rights.
- 🔒 TapeACall: A paid solution that uses conferencing to record, allowing you to bypass system restrictions but charges minutes of talk.
When using third-party software, be aware of security risks, you trust an unknown developer to access your private conversations, and Xiaomi’s built-in tool is safer in this regard, since data is processed locally and is not sent to third-party servers without your knowledge.
Archive transfer and backup
The accumulated archive of conversations is valuable information, the loss of which can become critical. 9 Pro can destroy all data. So regular backups of folders. call_rec This is a mandatory procedure for those who are serious over the phone.
The easiest way to save files is to connect your smartphone to your computer through USB-Cable. Select file transfer mode (MTP) You can find the device on your computer, go to internal memory, and copy the folder of the records to your hard drive.
Alternatively, you can use cloud services, Mi Cloud or Google Drive can automatically sync selected folders. sound_recorder In the cloud, every new file is instantly saved online, and this will protect the data even in the event of physical loss of the device.
⚠️ Attention: When syncing over the mobile Internet, monitor traffic. Audio files can take up a lot of space and downloading them can exhaust your data plan.
For periodic archiving, you can use the Explorer app and the Send function. Select the files you want, select the transfer method (Bluetooth, Telegram, Email) and send them to yourself or another device, which is convenient for quickly transferring certain important conversations to colleagues or lawyers.
Frequent problems and ways to solve them
Even with the right setup, users can run into problems: no recordings are created, the file is empty or the sound is too quiet. Often the reason lies in MIUI power saving settings that aggressively complete background processes. You need to find the Phone app in the battery settings and select No Limits mode.
Another common problem is the quiet voice of the person in the recording, which may be due to the microphone design or the cover covering the bottom hole, try removing the security accessory during an important conversation, or use a headset that is often written cleaner and louder.
If the records are missing after the system update, check if the path to the files has changed. Sometimes when you update MIUI, the folder structure changes, or old files are marked as "hidden." Turn on the display of hidden files in the Explorer settings to find missing content.
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Use the headset to record important conversations, and this will not only free your hands, but also ensure that you record sound directly from the microphone of the headset, bypassing the echo of the speaker and the noise of the environment.
If nothing works, you can try to clean up the phone app data, which won't delete your contacts or your call history, but it will reset the app's settings, including your recording settings, and then you'll have to re-activate the feature, but often it resolves software conflicts.
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The stable recording of calls on Redmi 9 Pro depends on the right energy saving settings and the selected region in the system.