Problem still present 25/03/2022, even following latest update: Nest Doorbell (battery) and Nest Hub Max do not allow two-way audio with Samsung devices via the Home app. E.g., I cannot talk through my Samsung phone, using the Home app, and have people at the doorbell or hub hear what I say, although I can hear them. It needs fixing in the Home app so it uses the correct microphone. The devices themselves work fine, device-to-device, but just not via the Home app on a Samsung device ☹️