[Balancing Act] London -- The transition to digital revenues among Africa's mobile operators is already under way. Online content and services (like streaming), mobile money and data revenues are all contributing to African Mobile Co V2. Advertising revenues should play a much bigger part in this transformation but the mobile operators are up against the global social media networks. Russell Southwood talks to Donald Mokgale, CEO, Out There Media (OTM) Africa about how it can help mobile operators connect with brands.