Thanks for posting and welcome to the Bose Community. I am deeply sorry to hear that you are having issues with making calls via Whats-app on your device and would love to assist you further.
Can you please confirm if the issue happens across all devices and calling platforms or only just with whats-app? I would also like to know if you have any error messages appear when this issue happens?
From doing a little bit of research this seems to be an issue that happens a lot with the Samsung S9 at the moment and doesn't autoroute the calls.
I look forward to hearing back from you in regard to this and if any other users are having a similar issue please do let us know!
Hector B - Community Support
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