No, they always change if you change a modem with WiFi. But most of the time you can change those settings, so it matches the old WiFi.
Be sure to delete the device in your Google Home App so you have to set it up like a new device. 😊
@RXShorty, thank you so much for the help.
@danielbugeja10, that certainly isn't the experience we want you to have with your Nest Audio and Nest Hub and we totally understand that troubleshooting can be frustrating, but these are the most helpful steps to figure out what's going on with your device. Let's give them a try!
Since you've done the factory reset already, which I believe you checked on the link provided above on how to, let me ask a few more questions to narrow things down:
Could you try to connect your Nest Hub to another phone's hotspot to see the difference? You'll need to have 2 mobile devices for this to work. Connect the phone you use for the set up to another phone's personal hotspot and proceed with the set up. Before doing so, do a factory first to revert your Nest Hub to its default and original settings.
Keep us posted.