Google on Monday will begin giving users a new way to use their existing mobile phone number with parts of its Google Voice service.

No, it’s not a full number port, which the company still says is coming and will eventually allow things like call screening, conference calling, or listening into a call before picking up–all with your existing number. Instead, Google is taking advantage of conditional call forwarding to let users send unanswered calls to Google’s voice-mail service in place of the one provided by a user’s carrier.

Once sent to Google, those voice messages are transcribed, then made available for playback and review online, or as an SMS message. Users can also take advantage of Google Voice’s customized greeting service to give callers a different voice-mail greeting depending on what number they’re calling from.