I need to switch carriers ASAP (as in, this afternoon). Since I can't wait another week for the new iPhones to come out, and since I don't really care about having the latest gadget, I'm trying to decide between the 4S and the 5. The carrier is currently selling the 16GB 4S for $49, and the 16GB 5 for $99. I've looked at the spec differences, but since I'm not really a tech person a lot of that doesn't mean anything to me. What would be some advantages of one over the other (metal back vs. glass, 4G vs. 3G - will 4G drain my battery faster and will it use up more data?, etc.). Thanks for any insight you can offer!