Yes, it’s possible to take phone calls while you’re wearing the headphones and they’re connected to your phone. Your phone will override the transceiver as the ‘dominant’ device, so you’ll hear the phone ringing in your headphones.
You can either accept the call on your actual phone, without having to remove the headphones to talk, or press the middle button on the left ear cup to answer.
Similarly, you can either decline the call on your phone or let it ring out, but this can be irritating to hear in your headphones.
If you don’t want to be disturbed by this while using your Audeara headphones, you can turn off the Bluetooth connection. Unfortunately, this means the headphones won’t be able to connect wirelessly to the Audeara transceiver, so you’ll need a wired connection.