With Google Voice, you get one phone number that works across smartphones, the web, and desk phones. With one number, you’re never tied to a physical device to make and receive phone calls, text messages (U.S. only), or access voicemail. You can also link multiple devices which will all ring simultaneously when a call comes in on your Voice number.
You can use Voice anywhere you can connect to the internet. Setting up a new account with Voice is available in these countries:
Currently, you can only send and receive SMS messages in the U.S.
A Google Account can have only one Voice number. However, you can link up to 6 non-Voice numbers to forward calls to or from a Voice number.
If you have more than one Google Account set up in Voice, you can use several accounts on the same device.
Calls made to other Voice numbers in the same G Suite domain are free. Other calls are billed based on Voice calling rates.
Calls made over mobile-carrier connections count toward mobile data charges. Any calls made over local-carrier voice lines (with linked numbers) might incur carrier charges.