Google Voice is an Internet telephony service from Google that enables free worldwide PC-to-PC voice calls and video-enabled calls as well as free PC-to-phone calls within North America. Google Voice is also designed to enhance the capabilities of an existing phone line by providing features such as online voicemail, the capability to send and receive free text messages, options for delivering transcribed voice messages as text messages or as email messages, and the use of a single phone number that can be forwarded to any other number.
While Google Voice originally required a new phone number in order to take advantage of its features, most of the service's features can now be utilized on an existing mobile phone number via Google Voice's Number Porting feature. Google Voice features can also be used on mobile devices that have an installed smartphone-specific Google Voice application. Google Voice apps are currently available for the iPhone, Blackberry and Android-powered devices.