How to get Google Voice with FREE US phone number? You can make unlimited US and Canada calling with Google Voice.
1. Google Voice is only available in US. You need VPN to get a US IP address.
2. Download a Free SIP phone so you can receive Google Voice verification and enter PIN.
3. Get a Free SIP number, Free SIP addresses to use SIP softphone.
4. To get a Google Voice free phone number, you need a local US phone number to answer the call that asks you to verify the PIN. (How to Get free local U.S. phone number?)
5. Now you can start the registration: http://www.google.com/voice
All calls from Google Voice to US and Canada are free, but you have to use computer to initial the call.
For Google Voice on ATA, please refer to How to setup Google Voice on ATA