Total consumer and advertiser expenditure on handset-based mobile media, which includes mobile internet, mobile social networking, games, applications, music, video, ringback tones, media alerts, and associated spend on mobile data, will exceed $560 Billion by 2021. Across this period, mobile advertising will account for an increasing (28%) share of total mobile media revenue. This report provides an overview of our forecast update and highlights key dynamics impacting the growth of the global mobile media economy. The forecast covers, users, events, ARPU and revenue for 14 categories of mobile media across business models from 2001-2021.