Enable Native Call Recording [OOS] [ROOT/NON…

Introduction
Hello everyone! You might/might not know that OxygenOS (and ROMs based on it) have an in-built/native call recording feature. However, it is not enabled for everyone as it is region-locked and it might/might not be illegal to record calls where you are, with/without notifying the other party that the call is being recorded.

This thread has been created with the intent of enabling this call recording feature on OxygenOS (and ROMs based on it). There are several ways to achieve this, which have been listed below. You can use any method, as per your preference, and it should work. Let's get straight to it then!

Ways to Enable
Non-Root Method(s)

ADB command via a computer

Root Method(s) (in order of recommendation)

Magisk module
Flashable zip
App which runs on boot
Script which runs on boot
Tasker profile
App which doesn't run on boot
Build.prop edit

Detailed Information and Usage
Non-Root Method(s)

ADB command via a computer
- Requirements: A working ADB interface on a computer, USB debugging enabled on the device
- Usage: Run the following command to enable native call recording:
  Code:
  
  adb shell settings put global op_voice_recording_supported_by_mcc 1
- Reboot Survival: No, the command would have to be run again after every reboot.

Root Method(s) (in order of recommendation)

Magisk module
- Requirements: Magisk 17.0+
- Usage: Download and copy the EnableOOSNativeCallRecording v5.1-Magisk.zip to your device. Once done, import it in Magisk as a module.
- Reboot Survival: Yes, Magisk will automatically run the module at every boot and enable native call recording.
Flashable zip
- Requirements: TWRP
- Usage: Download and copy the EnableOOSNativeCallRecording-Flashable v7.0.zip to your device. Once done, reboot to recovery (TWRP) and just flash the zip.
- Reboot Survival: Yes, the zip adds a rc script file to the /etc/init folder, which executes at every boot.
- Note: This method should work for rootless users too, but it needs TWRP and hence an unlocked bootloader.
App which runs on boot
- Requirements: A rooted device
- Usage: Download and install the EnableOOSNativeCallRecording v2.0.apk and run it. At the first launch, grant root access to the app.
- Reboot Survival: Yes, the app will automatically run at every boot and enable native call recording.
Script which runs on boot
- Requirements: Magisk 15.0+
- Usage: Download and copy the 99callrecord file to your device. Once done, move it to the /sbin/.core/img/.core/service.d folder and set permissions of the file to 0755 (rwxr-xr-x).
- Reboot Survival: Yes, Magisk will automatically run the script at every boot and enable native call recording.
Tasker profile
- Requirements: Tasker, a rooted device
- Usage: Download and copy the EnableOOSNativeCallRecording.prf.xml to your device. Once done, import it in Tasker as a profile.
- Reboot Survival: Yes, Tasker will run the profile at every boot and enable native call recording.
App which doesn't run on boot
- Requirements: A rooted device
- Usage: Download and install the EnableOOSNativeCallRecording v1.0.apk and run it. At the first launch, grant root access to the app.
- Reboot Survival: No, the app will have to be run manually after every reboot to enable native call recording.
Build.prop edit
- Requirements: A root file editor/app to edit build.prop, a rooted device
- Usage: Open your device's build.prop file (located to /system folder) and look for the persist.sys.oem.region entry. The present value of this entry would be OverSeas, and this has to be changed to CN. Once done, save your changes, making sure that the permissions of the file stay the same, i.e. 0644 (rw-r--r--).
- Reboot Survival: Yes, the entry change changes your OEM region to China, where the native call recording is already enabled.

Downloads

MediaFire Folder

Compatibility
Device(s)

OnePlus 5
OnePlus 5T
OnePlus 6

ROM(s)

OxygenOS 4.x.x
OxygenOS 5.x.x
OxygenOS 9.x.x

Important Read-Me Points

(Magisk module and script method only) The command to enable call recording will be executed 30 seconds after the phone has completed boot, so please make sure that you wait for at least 30-45 seconds after boot before checking if the call recording menu option is visible for you under the stock dialer's settings.
(App method only) After your device fully boots up, a notification message will appear in the status bar/pull down notification panel to let you know that call recording has been enabled (which will go after 10 seconds if you don't swipe it away).
(App method only) There is also a "Read Me" link in the notification message if you want to read a short information regarding the app.
(All methods) All your recordings will be stored at /storage/emulated/0/Record/PhoneRecord in the aac format.
(All methods) The mod works only works when using the stock OxygenOS dialer, and it may/may not run on a different dialer.
(All methods) If something (the app/magisk script/anything) that is supposed to run on boot is not executing on boot, you need to turn off advanced optimisation: Settings -> Battery -> Battery optimisation -> Three dot menu (⋮) -> Advanced optimisation -> Turn off.
(All methods) The mod enabled the native call recording feature, but may/may not turn on auto-recording of the calls. If you wish to do that, after using one of the methods listed above, open the Stock Dialer App -> Three dot menu (⋮) -> Settings -> Auto-record calls -> Turn on.
(All methods) If you have hidden root from the stock dialer app via Magisk Hide, the call recording option will disappear after sometime. Make sure that the stock dialer is not checked in the Magisk Hide selection list.
(Build.prop method only) There may be side-effect(s) to changing this value. One known effect is that your on/off-screen buttons will swap (recents and back), but they can be swapped back using the buttons settings. There may/may not be other side-effect(s) as well. Use caution!

Disclaimers

I am not the developer of the Enable OOS Native Call Recording app. I merely stumbled upon it in OnePlus 3T's Themes, Apps and Mods forum and I take no credit for it. Please direct all your thanks and/or donations towards @padlad, the original developer of the app. Link to the original thread is here.
I am not the developer of the flashable zip that adds the necessary command to the ramdisk. The zip was posted later in this thread and I take no credit for it. Please direct all your thanks and/or donations towards @Zackptg5, the original developer of the flashable zip. Link to the release post is here.
You are doing this at your own risk. I am not responsible for bricked devices, dead SD cards, thermonuclear war, or you getting fired because the alarm app failed. Please do some research if you are unsure of how to go about something.
It might be illegal in your country to record calls with/without notifying the other party that the call is being recorded. Either ways, you are responsible for using this mod.

Thanks To

@padlad, for creating the Enable Call Recording app and the Tasker profile
@Zackptg5, for creating the flashable zip and sharing it for everyone to use
@topjohnwu, for Magisk and all the work he's ever done for the community
@osm0sis, for the AnyKernel2 template and all the work he's ever done for the community
@Crafty Apps EU, for Tasker
@Tomek Kondrat, for the mention in this XDA article
All of you guys for viewing this thread

Changelog
Enable OOS Native Call Recording Apk

v1.0 - Initial release
v2.0 - Enable run-on-boot

EnableOOSNativeCallRecording-Magisk Zip

v1.0 - Initial release for Magisk v13.1, v13.2, v13.3 (Template version 4)
v2.0 - Update for Magisk v14.0 (Template version 1400)
v3.0 - Update for Magisk v15.0 (Template version 1500)
v4.0 - Reduced the script execution delay from 2 minutes post boot to 10 seconds post boot
v4.1 - Slightly increased the script execution delay from 10 seconds post boot to 30 seconds post boot to fix issues some users reported
v5.0 - Update for Magisk v17.0 (Template version 17000)
v5.1 - Made the script execute the command 5 times at an interval of 30 seconds after boot to try and alleviate some issues that a few people have been having with call recording getting disabled after a while

EnableOOSNativeCallRecording-Flashable Zip

v1.0 - Initial release
v2.0 - Updated to remove the separate init file and run the command from existing the init.rc file
v3.0 - Updated to include device codenames in addition to the official device names
v4.0 - Synced with the latest AnyKernel template and new BusyBox
v5.0 - Synced with the latest AnyKernel template and changed backup/restore method
v6.0 - Completely re-wrote flashable zip; now works for rootless users too who have an unlocked bootloader and TWRP installed
v7.0 - Added a slight delay in command execution to support Treble OOS; shifted the script to /system/etc/init

99callrecord

v1.0 - Initial release
v2.0 - Reduced the script execution delay from 2 minutes post boot to 10 seconds post boot
v2.1 - Slightly increased the script execution delay from 10 seconds post boot to 30 seconds post boot to fix issues some users reported

EnableOOSNativeCallRecording Prf Xml