Google Nest does not make it easy to change Wi-Fi settings on most Google Nest devices, so their first recommendation when getting a new router/modem is to set the network name (SSID) and password to the same values as on the old router/modem. That's what we did when we got a new router/modem, and we didn't have to update any of our Google Nest devices.
If that's not possible, then Google Nest's process is to remove each Google Nest device from the Google Nest app or Google Home app while still on your old Wi-Fi network, then do a factory reset, and then reinstall on the new Wi-Fi network. Failing to do the first step can cause problems that MAY be able to be resolved with assistance from Support.
Our doorbell disconnected this morning and all the other smart items in the house reconnected but the doorbell will not connect even though it's completely charged I don't know what to do to fix it but if anybody else has the same problem I'd be happy to hear how you fixed it
@Martidob and @ISM thanks for posting here in the community. I'm sorry to hear about your troubles reconnecting your Nest Camera or Nest doorbell back to your WiFi network. The information that MplsCustomer has shared above is right on the spot. Try giving it a whirl and update us here in this thread. Let us know if you have more questions in mind.
I appreciate the help, MplsCustomer.
It's us again. We're bumping up this thread for the steps we've suggested above, so we can keep the ball rolling. In case you have an update, you know where to find us.
Just one quick final check in here since activity has slowed down. We'll be locking the thread in the next 24 hours, but if you still need help, I would be happy to keep it open. If there's more we can do, just let me know.