Sony Ericsson Mobile Communications AB is a joint venture established on October 1, 2001 by the Japanese consumer electronics company Sony Corporation and the Swedish telecommunications company Ericsson to manufacture mobile phones.
The company's global management is based in Hammersmith, London, and it has research and development teams in Lund, Tokyo, Mexico City, Beijing, and Redwood Shores in the US. By 2009, it was the fourth-largest mobile phone manufacturer in the world after Nokia, Samsung and LG. The sales of products largely increased due to the launch of the adaptation of Sony's popular Walkman and Cyber-shot series.
In 2010, its market share had fallen to sixth place.