No. Phyn devices cannot connect to Wi-Fi networks with a hidden SSID.
By default, wireless routers broadcast the network name (SSID) so devices can find and connect to it. If SSID broadcast is disabled, the Phyn device will not be able to discover your network during setup.
To complete setup and connect your Phyn device to the internet, you must enable SSID broadcast on your router. Once setup is complete, the SSID must remain visible for the device to stay connected.