Toby Shapshak: You don't need an app for that

Are the simplest phones the smartest? While the rest of the world is updating statuses and playing games on smartphones, Africa is developing useful SMS-based solutions to everyday needs, says journalist Toby Shapshak. In this eye-opening talk, Shapshak explores the frontiers of mobile invention in Africa as he asks us to reconsider our preconceived notions of innovation.