If when you start a call, the camera selected is not the correct one, you can change it by clicking on the settings in the top right:
From there you can choose which camera should be used as the back camera or the front camera:
If when you start a call, the camera selected is not the correct one, you can change it by clicking on the settings in the top right:
From there you can choose which camera should be used as the back camera or the front camera: