I have the LG Optimus V. I know I use the phone to talk without a data plan if using GrooVe IP and Google voice via WiFi, however, can I connect to a 3g network and use it? I am a little confused thinking it can only be used with WiFi. What I am asking is: If I am out and about and not using WiFi can I use GrooVe IP and still make calls somehow? Please lead me in the right direction here. Thanks!