I am trying to understand these two. I have both. One, I pay $25 monthly for to AT&T because I wanted to be able to always access the Internet and there is no contract. Join anytime, cancel anytime. Then ~ I also have WiFi. I feel so dumb as I don't remember which one I pay through Comcast and AT&T. And which one is faster? At home, here, I think I use WiFi more....shitums. I have no clue. Doesn't it say up top in the left hand corner what I'm using?