If I had an iPod Touch 4, I could make video calls from the FaceTime camera via WiFi. I could make unlimited, free calls to the US over WiFi via Skype, and I could send texts over WiFi via AIM. Why do I pay for a data plan for an iPhone you might ask? I think it is the security that comes with knowing I will have coverage everywhere, even when I’m not near a hotspot. Yes I do use WiFi when I have the option, because it’s faster, but the convenience of 3G service gives me peace of mind.