Your existing car probably doesn't have a built-in WiFi hotspot, but AT&T will soon have a way to add one and deliver that sweet, on-demand internet access. The carrier is launching the ZTE Mobley, a WiFi hotspot that plugs into your car's OBD-II port and shares an LTE data link with everyone inside. Yes, you could just tether your phone, but AT&T is counting on simplicity to reel you in -- the hotspot goes live shortly after you turn your car on, and you don't have to worry about battery life. It won't cost you much to give this concept a shot, at least. The Mobley will be available for 'free' on a 2-year contract, or $100 outright. The biggest expense is the data itself, which will cost you $20-plus for stand-alone service or $10 if you add the Mobley to a shared plan.