Historically, the only way to utilize Google Voice was to request an invite. Yesterday, Google updated the Google Voice application – opening it to the public, with no invitation required.
For users who aren’t familiar with the application, it provides an integrated voicemail player in Gmail, is also available as a mobile app, it can be used with an existing phone number, and also has the ability to transcribe your voicemails.
If you never received an invite, be sure to check it out. Also checkout the video below for more information.