The GSMA's Mobile World Congress, held in Barcelona each year, is the largest mobile industry conference in the world. It used to be a rather small affair, but thanks to the truly insane growth of the mobile industry over the last 10 years, MWC is now one of the largest conferences in the world. The Fira Gran Via conference center, where MWC takes place, has 45 restaurants, a couple of heliports, and 1,700 exhibitors spread out across eight exhibition halls totalling 240,000 square meters (2.6 million square feet) -- and I'm proud to say that I traversed every last square foot of it, just so I could tell you all about it.