Sony Mobile Communications AB (formerly Sony Ericsson Mobile Communications AB) is a multinational mobile phone manufacturing company headquartered in Tokyo,Japan, and a wholly owned subsidiary of Sony Corporation. It was founded on October 1, 2001 as a joint venture between Sony and the Swedish telecommunications equipment company Ericsson, under the name Sony Ericsson. Sony acquired Ericsson's share in the venture on February 16, 2012.
Sony Mobile Communications has research and development facilities in Tokyo, Japan;Chennai, India; Lund, Sweden ; Beijing, China and Silicon Valley, United States. Sony Mobile is the world's 10th-largest mobile phone manufacturer by market share in the first quarter of 2012. It is the world's third-largest smartphone manufacturer by market share in the third quarter of 2012.