structural:summarization
Mobile

Mobile phones were introduced in Japan in 1979 but became a mass media only in 1998 when the first downloadable ringing tones were introduced in Finland. Soon most forms of media content were introduced on mobile phones, tablets and other portable devices, and today the total value of media consumed on mobile vastly exceeds that of internet content, and was worth over $31 billion in 2007 (source Informa). The mobile media content includes over $8 billion worth of mobile music (ringing tones, ringback tones, truetones, MP3 files, karaoke, music videos, music streaming services, etc.); over $5 billion worth of mobile gaming; and various news, entertainment and advertising services. In Japan mobile phone books are so popular that five of the ten best-selling printed books were originally released as mobile phone books.