Mobile World Congress is in Spain, which is lucky, because today's the day that AT&T allows its users to use LTE while they're there. Following the deal with Rogers in Canada, 'Ma Bell has pushed out a list of 13 countries, including Japan, Russia and South Korea, where road warriors can now suck down super-fast data in peace. In order to make sure you're not going over on your plan, the the company has also launched a new travel app for iOS and Android devices that'll alert you if you get close to your cap. Someone should have brought MWC forward by a fortnight -- that way everyone could have used LTE while during the Winter Olympics.