Thanks for reaching out. The simplest fix for most Nest products is to update your home network so that the network name (SSID) and password are the same as before. If that is not an option, you can check this article on how to Change camera and doorbell Wi-Fi settings for detailed steps.
Just checking in to see if you still need assistance with this. We'll leave this topic open for another 24 hrs in case there are any follow up questions or comments. Please let me know if you need further assistance.
