Ok well this might be a dumb question but here we go anyway. So lets say I'm in a building where I have virtually no 3G reception. However I have a clear wifi signal to the network in the building. Will i still be able to call/text using the wifi signal with no 3G? And if I have wifi on and have 3G connection and do a speedtest on both and get about say 5 mbps with wifi and 1 mbps with 3G, does this mean that I'll receive calls/texts sooner? Basically I'm trying to understand what connection the phone uses whether it can go through wifi or if it has to use 3G. I hope you guys understand what I'm trying to ask lol.