Google Home will place your call over the Wi-Fi connection. While ringing or in call, the light ring on Google Home will be a spinning pale blue. By default, recipients will not see your phone number. Instead, they will see either Unknown or No Caller ID.
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You can also set up Wi-Fi calling on an iPad, iPod Touch, or Mac by connecting them through your iPhone. Heres how: On your iPhone, go to Settings, Phone, and tap on Wi-Fi Calling.How to Turn on Wi-Fi Calling for Android Phones. Screenshot of Google pixel settings menu.

The Wi-Fi calling Android feature is easy to access. Just switch the option to the on position to start using it for future calls. These directions apply to Google Pixel and Samsung Galaxy phones with an activated SIM card inserted.
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There might be something blocking Wi-Fi calling on your home network, like a setting on your router. To test this, you should try connecting to a different Wi-Fi network, such as one at your office or a friend's house, to see if it works there.
Make sure your Google Home or Nest device is within 15 - 20 ft (4 - 6 m) of the Wi-Fi router. If you have a dual band router, try to set up your device on both the 2.4 GHz and 5 GHz bands. Make sure Wi-Fi, Location Services and Bluetooth are turned ON on your phone or tablet.