Call recorder on devices that have at least dedicated volume keys
by Luxferre
(safe method)
(safe method)
This trick only works on KaiOS 2.5.2 or higher (if it will not officially implemented):
Connect with WebIDE, go to the "Device Settings" and set the following:
callrecording.mode (string) = on or auto (manual or automatic recording);
callrecording.notification.enabled = false - just for sake of it;
callrecording.vibration.enabled = false - just for sake of it;
callrecording.file.format = wav (default is 3gpp, IIRC one can specify ogg and opus as well).
Now, if your KaiOS phone has a Camera button, recording will be toggled with it. If there's no Camera button, recording can be toggled by pressing Left arrow, a "REC" icon will appear.
The resulting files will be stored in the "callrecording" directory of your main storage (internal or sdcard).