GVoice

short for Google Voice - a service that allows its users to manage their incoming and outgoing calls and to setup custom voicemail messages for groups or individuals.

see also: Google Voice

GVoice User: Hey, my new number is 504-555-1234.
Friend: What happened to your old number?
GVoice User: I still have it, but now all my calls are forwarded from my new number to my cell phone.