I cant upgrade my old phone and was just curious if there is a more cost effective way to use voip with a registered # on my old 3gs. Its hard to figure it out in the app store - almost every app is for a newer version of ios. Why they don't filter that out is kind of disappointing.. but also why I figured to try asking in here. I have been looking into google voice. The official app requires ios6. Ive heard there are 3rd party apps that work with it too. Does anyone have any ideas on what apps I may want to try here?