This document provides an overview of the evolution of multiple play in the mobile service sector (voice, data and video) focussing in particular on data services provided through 3G networks that have been launched in almost all OECD countries. Fixed-mobile convergence can also be viewed as one facet of mobile multiple play and will be touched on in this paper.  The paper also assesses the competition from broadcast networks – both terrestrial and satellite, and from the development of advanced terminal equipment, such as iPods and flash players.  Regulatory implications will also be examined in terms of access or behavioural issues. The paper complements earlier work by the OECD on multiple play by fixed or cable operators, and mobile voice prices.