I'm NOT from the telecom world and am wondering if your cell phone needs data services to function with Google Voice?
Originally Posted by OldGrump
No, but it's more convenient to initiate a call if you do - because a Google Voice dialer replaces your built-in dialer.
Without it, you need to dial your google voice #, either auto-login to your voicemail or punch in your pin, press 2, and then the number you want to dial.
Most of the phones with google voice dialers integrate in with your phone book list to avoid all that cumbersome junk.
I used to have a Nextel phone with free incoming minutes: when I used google voice to initiate calls, rather than dialing my google voice number: calls were done with free minutes all day long.
One handy feature is you can start a call, and then transfer it to another phone. Start it on a landline, transfer to your mobile, and back.
Using a Google Voice Dialer on your phone requires sending data via the internet to google to initiate the call. Even if you had a pay as you go data plan, it doesn't add up to much usage. Why? The call itself is not on the google network as a VoIP call until it leaves your carrier's network. This means calls apply usage towards regular minutes as any other local call would, and not towards your data usage.