The document discusses mobile phone adoption rates and two mobile technologies: interactive SMS and cell books. It provides details on: - Over 4.5 billion mobile phones were in use worldwide in 2009, with half the world owning a mobile phone. - Interactive SMS allows users to text a keyword to a short code to receive information via SMS, with examples for getting meeting details or news headlines. - Cell books allow entire books to be downloaded to mobile phones via WAP for a low cost, with an example given of an HIV/AIDS awareness book.