Wife and I each got a new 4S yesterday. We do NOT have a text messaging plan because I refuse to pay into something I used to get free. Anyway, we're using Google Voice as an alternative. As far as I can tell, I've set up both phones the exact same way, but her GV messages seem to come thru the Apple Messages app and mine don't; mine come thru the GV app. Any idea what is going on here? (1) I don't want to pay for any messages if I can help it. (2) I thought Messages could be used as a texting client between iOS devices using internet data and not true SMS. That's how it works on my iPad. But I can't tell exactly what's going on with our iPhones.