Hi jsavage,
Thanks for reaching out to the community! I understand you'd like to know the latest software version for the Nest Doorbell (wired). I appreciate you confirming your current firmware version. I'll be glad to share some details with you!
Currently, this specific software version information isn't available. However, the Nest Doorbell (wired) automatically updates its software when connected to Wi-Fi. Because manual updates aren't available.
If you have any other questions, please don't hesitate to post them on this forum.
Best regards,
Juan
