Recording calls on Android 7: all methods taking into account system limitations

Recording telephone conversations on smartphones with Android 7.0 Nougat is a task that requires a special approach. Unlike newer versions of the OS, where Google has tightened its privacy policy, "seven" still leaves loopholes to implement this function. However, there are nuances here: manufacturers often block standard recording capabilities, and third-party applications can be unstable.

In this article we will look at all current methods from built-in tools (if they are available on your device) to bypassing restrictions through ADB and specialized apps. We will pay special attention legal aspects: in some countries, recording conversations without the consent of the interlocutor is prohibited by law. You will also learn how to avoid typical problems: missing audio fragments, poor recording quality or conflicts with the firmware.

Important: on Android 7.0 it is impossible to record a call via Google Drive or other cloud services directly - this function appeared only in Android 9+. But there are workarounds, which we will discuss below.

1. Checking built-in recording capabilities

Some manufacturers (for example, Xiaomi, Samsung or Huawei) added the call recording function directly to the standard "Phone" application, even on Android 7.0. It’s easy to check its availability:

• 📱 Open the application Phone and dial the number to call.
• 🔍 During a conversation, look for a button on the screen with the icon microphone or red dot (usually next to the "Speakerphone" and "Add call" keys).
• 💾 If there is a button, press it to start recording. The file will be saved in the folder CallRecordings in the internal memory.

Please note: even if the function is there, it may work only for incoming ones or outgoing ones calls. For example, on some models Samsung Galaxy J5 (2017) recording was turned on automatically for all incoming ones, but required manual start for outgoing ones.

⚠️ Attention: On firmware with a modified interface (for example, MIUI 8 or EMUI 5) the path to the entry may differ. If the button is not in the main menu, try clicking on ⋮ (three dots) → Call settings → Call recording.

Manufacturer	Model (example)	Recording support	Restrictions
Samsung	Galaxy S7, J3 (2016)	Yes (built-in)	Incoming only
Xiaomi	Redmi Note 4, Mi 5	Yes (MIUI 8+)	Requires manual enable
Huawei	P9 Lite, Mate 9	Yes (EMUI 5)	Files are encrypted
Google	Pixel, Nexus 6P	No	Locking at OS level

If your firmware does not have the function, proceed to the next section. But first, check if it is hidden in the engineering menu:

##4636## → Testing → Microphone

On some devices you can enable recording here, but this method is unstable and can lead to crashes.

2. Applications for recording calls: TOP 3 proven options

If there are no standard tools, third-party apps will come to the rescue. However, on Android 7.0 they face two problems:

1. API restrictions: Google has prevented apps from accessing the audio stream of calls since Android 6.0, but workarounds still work.
2. Manufacturers block: On some devices (for example Sony Xperia XZ) even root access is not possible help.

We tested dozens of applications and selected three that work stably on the "seven":

• 🎤 Cube ACR - records both sides of the conversation, but requires setting up the audio source (VOICE_CALL). Suitable for Samsung i Xiaomi.
• 📞 Call Recorder by Lovekush - simple interface, saves files in .mp3. Works without root, but may not capture the voice of the interlocutor on some firmware.
• 🔊 Automatic Call Recorder - supports cloud backup (set up in Settings → Cloud → Google Drive). Minus: shows advertising.

How to set up Cube ACR (the most reliable option):

1. Download APK from the official website (version 2023 or newer).
2. In the application settings, select Recorded audio → VOICE_CALL.
3. Activate the option Ignore Android restrictions.
4. Add the application to battery optimization exceptions (Settings → Battery → Optimization).

⚠️ Attention: On devices with processors Qualcomm Snapdragon (for example OnePlus 3T) applications can only record your voice. To capture both sides you will need root or modified firmware.

Install the app from a trusted source|Check permissions (microphone, memory)|Configure the file format (recommended.mp3)|Disable saving battery for the application|Test the test call recording-->

3. Recording via ADB: bypassing system restrictions

If applications do not work, you can use Android Debug Bridge (ADB) a debugging tool that allows you to change system settings. This method does not require root access, but you do need:

• 🖥️ Computer with Windows/Linux/macOS;
• 🔌 USB cable (preferably original);
• 📱 Enabled USB debugging (Settings → About phone → Build number — press 7 times, then return in Settings → For developers → USB debugging).

Instructions:

1. Download ADB Tools and unzip to a folder.
2. Connect your phone to the PC and enter in the command line:

   adb devices

   Make sure that the device is detected.

3. Give permission to record audio:

   adb shell settings put global capture_audio_output enabled

4. Install the recording application (for example, Cube ACR) and restart the phone.

After this, the application will be able to capture the audio stream of calls. Disadvantage of the method: after rebooting or updating the OS, the settings are reset and the procedure must be repeated.

What to do if ADB does not see the device?

Make sure that the drivers for your model are installed (download from the manufacturer's website).|Try a different USB cable or port.|Enable the "Allow USB debugging (safe mode)" option in the developer settings.|On some devices (for example, Huawei), you need to additionally allow "HiSuite" or "HDB".

4. Alternative methods: from a headset to a second phone

If software methods do not work, consider hardware solutions. They are less convenient, but are guaranteed to work on any device:

• 🎧 Headset with recording: Some Bluetooth headsets (for example, Plantronics Voyager) have a built-in recording function. Connect it to your phone, and during a conversation press the record button on the headset. The file will be saved to its internal memory.
• 📱 Second phone: Place a second smartphone next to it with the voice recorder turned on. The downside is low quality and extraneous noise.
• 🔌 Audio splitter: Buy a splitter for a 3.5 mm jack (for example, UGREEN 30703). Connect your phone and voice recorder/computer to it. The call will be duplicated to the recording device.

For a headset with recording, configure in your phone:

1. Settings → Connected devices → Headset settings.
2. Activate the option Allow access to calls.
3. In the headset menu, select the mode Record calls.

⚠️ Attention: When using an audio splitter, turn off the microphone on the recorder device to avoid echo. The optimal volume on the main phone is 70-80%.

5. Legal aspects: when is it legal to record a call

Before recording calls, study the laws of your country. In most cases, the following rules apply:

Country	Recording without consent	Use in court	Fine for violation
Russia	Allowed for personal use	Admitted as evidence	Up to 80,000 ₽ (Article 138 of the Criminal Code of the Russian Federation)
Ukraine	Notification of the interlocutor is required	Only with the consent of both parties	Up to 17,000 ₴
Kazakhstan	Prohibited without consent	Not allowed	Up to 200 MCI (~540,000 ₸)
Belarus	Allowed to protect rights	Allowed with court permission	Up to 50 BV (~1,600 BYN)

Important nuances:

• 📜 In EU valid GDPR: recording without consent is considered a violation of confidentiality.
• 🏛️ In USA laws differ by state: in California the consent of both parties is required, and in Texas only one.
• 💼 For business correspondence (for example, negotiations with clients), be sure to notify the interlocutor at the beginning of the conversation.

If you plan to use the recording in court or to resolve disputes, save:

1. Original file without editing.
2. Call logs (can be exported via Settings → Calls → Export).
3. Screenshot of the screen with the date and time of the call.

6. Problem solving: why sound is not recorded

If recording does not work, check these points:

Problem	Possible reason	Solution
Only my voice is recorded	Firmware restrictions	Use ADB or root
File is empty or broken	Not enough write permissions	Check application permissions
Write breaks	Battery optimization	Add the application to exceptions
Low sound quality	Audio compression	Select in settings Quality → High (128 kbps)

Frequent errors and their correction:

• 🔇 No sound from the interlocutor: On some devices (for example, LG G6), disabling VoLTE in the settings helps SIM cards.
• 📱 The application crashes: Delete the cache (Settings → Applications → [Name] → Memory → Clear cache).
• 🔌 Does not work via ADB: Check the version platform-tools (must be at least 30.0.5).

If nothing helps, try alternative firmwareFor example, on Android 7.0 work well:

• LineageOS 14.1 (supports recording via AudioRecord API);
• Resurrection Remix (there is a built-in module for recording).

⚠️ Attention: Installing custom firmware will void the warranty and may lead to data loss. Before the procedure, make a backup copy via TWRP or Orange Backup.

7. Saving and managing recordings

Recorded files take up memory space and can become a privacy vulnerability. To avoid problems:

• 🗃️ Organize folders: Create separate directories for work, personal and important calls (for example, /CallRecords/Work, /CallRecords/Personal).
• 🔒 Protect files: Use archivers with a password (7-Zip, RAR) or encrypt via Cryptomator.
• ☁️ Cloud backup: Automatically upload recordings to Google Drive or Dropbox (set in the recording application).
• 🧹 Cleaning: Delete unnecessary files older than 30 days (can be automated via SD Maid).

How to export recordings to a PC:

1. Connect your phone via USB in the mode File transfer (MTP).
2. Go to folder Internal Storage → CallRecordings (or the one specified in the application settings).
3. Copy the files to your computer. For processing, use MP3Tag (to add marks) or Audacity (to crop).

If necessary transcribe recording:

• 🎤 Free services: Otter.ai (English), Yandex SpeechKit (Russian).
• 💰 Paid: Sonix (supports 30+ languages, cost from $10/hour).

FAQ: Frequently asked questions about recording calls on Android 7

Can I record a call via WhatsApp or Telegram?

No, messengers do not provide an API for recording voice calls. However, you can:

• Use a second phone with a voice recorder enabled.
• Connect the phone to the PC via Scrcpy and record sound from the computer (you will need ADB).

For WhatsApp there is a workaround: turn on the speakerphone and record with the microphone of another device.

Why does the application only record my voice on Xiaomi Redmi Note 4?

This is a limitation of the firmware MIUI. Solutions:

1. Install Magisk and module MIUI Call Recorder Enabler.
2. Use ADB-command:

   adb shell settings put global force_allow_audio_capture 1

3. Reflash the phone to LineageOS or Pixel Experience.

On some versions MIUI 8/9 disabling VoLTE in the settings helps SIM cards.

How to record a call on a Samsung Galaxy S7 without root?

On Samsung s Android 7.0 two methods work:

1. Standard function: During a call, press ⋮ → Record. The file will be saved in My Files → Device storage → Voice Recorder.
2. Cube ACR application:
   1. In the settings, select Recorded audio → VOICE_COMMUNICATION.
   2. Activate Use an alternative method.
   3. Add the application to Unoptimized (Settings → Battery → Battery optimization).

If it doesn’t work, check if the function is disabled in Settings → Additional features → Call recording.

Is it legal to record conversations with a bank or support service?

Q most countries yes, but with reservations:

• 🏦 Banks: Usually at the beginning of the conversation the operator informs you that the call is being recorded.
• 📞 Help service: If you are calling as a client, recording is permitted to protect your rights. But notify the interlocutor (for example: “I am recording the conversation to record information”).
• ⚖️ Court: The recording can be accepted as evidence if it is not edited and contains metadata (date, time).

Exception: in Germany and France recording without consent is prohibited even for personal use.

How to reduce noise in a recording?

Use these tools:

• 🎛️ Audacity (filter Noise Reduction): Effects → Noise Reduction → Select the area with noise → Apply.
• 🤖 Android apps: Lexis Audio Editor (yes "Denoise" tool).
• ☁️ Online services: Krisp (free for files up to 10 MB).

For best results, record in a quiet room and keep the microphone close to the sound source.