Within the next several years, another billion people will make regular use of cell phones, continuing the fastest adoption of a new technology in history. This will unleash a wave of entrepreneurship, collaboration, and wealth creation, thereby transforming this Next Billion into a powerful force in the global economy. By innovating applications and business models, and by testing them locally in the field, this initiative explores how mobile technologies can reduce friction in bottom-of-the-pyramid markets across the developing world.