From the practical to the insightful, there’s pretty much a mobile application for whatever you need. As a result, there's a lot of competition for this digital real estate.   In the battle between Android and iPhone, mobile brand HTC has executed its latest strategic move. To mark the launch of its new series of handsets, HTC has created an epic marketing campaign across three of the country’s biggest train stations.   Thousands of tiny green HTC branded Android robots have been placed in Antwerp, Brussels and Namur stations to help promote the launch of the brand's Flyer, Sensation, Incredible S, Desire S and Wildfire S devices. Commuters passing through the stations had better watch their step. Check it out here. It’s really interesting to see how these systems are evolving and great to see creative marketing campaigns that communicate the reach of mobile technology. You might remember T-Mobile's 2009 campaign of flash mobs that also made an appearance in Antwerp’s station. Android have went literal and run with it for this creative spin on the flash-mob trend.