Installed this to use new Google Nest doorbell. The doorbell/camera function work but the 2-way communication does not. I can hear person at my door but they can't hear me. You need your ear up to the doorbell's speaker to hear and that's still nearly impossible. Volume say to max. Same issue on my phone (Note 8) and my wife's (S20). Tried tech support but their suggestions for nothing. Web search suggests this is an issue w/Samsung phones for 2+ years. Have to return the doorbell now.