So you're pretty sure you want the latest iPhone, but now you've got a choice of 3 out of the top 4 US carriers. We take a look at the iPhone 4S on the nation's 2 largest carriers, ATT and Verizon, for this video. We check out data speeds, web page load times, plan pricing and more. Does ATT's faster 3G network technology make all things Internet faster? You might be surprised by the answer.