Third-party apps like the SCA can’t actively control which SIM card is used for outgoing calls.
SCA tells the operating system to dial a number.
Which Caller-App or SIM card will be used is part of Android
and depends on the OS-Settings of the device.
We recommend, the following:
The business SIM should be set as the default for outgoing calls in device settings.
All private contacts should be saved with the private SIM assigned for outgoing calls.
