This is probably a very dumb question. But ~ When I am at home, my iPad uses wifi. I assume it taps into my Comcast Wifi, right? But unless I find a hotspot out in the field it will kick over to 3G. What I want to know is why my cell phone which has 4G, when at home does not connect to my Wifi, automatically, like my iPad? It just stays on 4G. I try to search for available Wifi, and I pop up, but it won't let me in. Next question.... Which is faster Wifi or 4G? At home the Wifi is when I am on my iPad, but out in the field, Wifi is hella slow. My cell is 4G and fast everywhere! Please tell me this all makes sense!