In this case, it’s important to clarify that the issue is not caused by the application itself. This is a well-known limitation on Android devices that affects all monitoring apps. As it is related to the target device’s firmware, the same behavior would occur with any similar application.
The firmware disables the mic APIs when the target receives a call, resulting in a one-sided recording.
In this case, we cannot guarantee which device will work, as each smartphone provider may apply manufacturer-specific firmware settings based on demand.
However, we can offer you a 20% extension to compensate for the value.