On the VZW website I selected one of the Galaxy S III models to upgrade to. A pop-up then asked me if I want to buy a 4G SIM card. What? Nowhere up till that point had the site said anything about there being an option to buy a 4G SIM card or not, let alone why I would choose to buy or not buy one, or what one costs. Are they giving me the option to buy a 4G phone that doesn't actually supply 4G phone service? Do I need this SIM card and what does it cost?