Sony Ericsson Mobile Communications AB is a joint venture established on October 1, 2001[1] by the Japanese consumer electronics company Sony Corporation and the Swedish telecommunications company Ericsson to manufacture mobile phones, which now has ended since Sony bought out Ericsson. The stated reason for this venture is to combine Sony's consumer electronics expertise with Ericsson's technological knowledge in the communications sector. Both companies have stopped making their own mobile phones. On October 27, 2011, Sony announced that it will acquire Ericsson’s whole stake in Sony Ericsson for €1.05 billion ($1.47 billion), making the mobile handset business a wholly owned subsidiary of Sony.[

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

Sony was a marginal player in the worldwide cell phone market with a share of less than 1 percent in 2000.

By August 2001, the two companies had finalized the terms of the merger announced in April. The company was to have an initial workforce of 3,500 employees.

Sony Ericsson's strategy was to release new models capable of digital photography as well as other multimedia capabilities such as downloading and viewing video clips and personal information management capabilitie