Sony Mobile Communications Inc. (formerly known as Sony Ericsson Mobile Communications AB) is an international telecommunications company founded in 2001 as a joint venture between the Swedish telecommunications manufacturer Ericsson and the Japanese electronics manufacturer Sony. The company produced mobile phones and their accessories under the Sony Ericsson brand, and was one of the leaders in the global mobile phone market. Since 2012, the company has focused on the production of smartphones. The headquarters is located in London, but the company is registered in Sweden.