Title: Ericsson
Content:  Sony Ericsson Mobile Communications AB (Sony Ericsson) was a joint venture with Sony that merged the previous mobile telephone operations of both companies. It manufactured mobile telephones, accessories and personal computer (PC) cards. Sony Ericsson was responsible for product design and development, marketing, sales, distribution and customer services. On 16 February 2012, Sony announced it had completed the full acquisition of Sony Ericsson, after which it changed name to Sony Mobile Communications, and nearly a year later it moved headquarters from Sweden to Japan.
Title: Sony Canada
Content:  Sony Mobile Sony Mobile Communications (formerly known as Sony Ericsson Mobile Communications) sells mobile phones, accessories and PC-cards. Established as a joint venture by Sony and Ericsson in 2001, with global corporate functions located in London, the company employs over 7,500 people worldwide, including R&D sites in Europe, Japan, China and America. Sony acquired Ericsson's share in the venture on February 16, 2012 and renamed the company as Sony Mobile Communications. Sony Computer Entertainment Sony Computer Entertainment America Inc. sells the PlayStation and PSone game console, the PlayStation 2 computer entertainment system, the PSP (PlayStation Portable) system, and the ground-breaking 
Title: Sony Mobile
Content:  Sony Mobile Communications Inc. (ソニーモバイルコミュニケーションズ株式会社) was a multinational telecommunications company founded on October 1, 2001, as a joint venture between Sony Group Corporation and Ericsson. It was originally incorporated as Sony Ericsson Mobile Communications, and headquartered in London, England, until Sony acquired Ericsson's share in the venture on February 16, 2012. On April 1, 2021, Sony integrated its electronics businesses including Sony Mobile into one company called Sony Corporation. Prior to April 1, 2021, Sony Mobile exclusively created Android-powered smartphones under the Xperia sub-brand name; it also developed tablet computers (Sony Tablet), smartwatches (Sony SmartWatch) and fitness trackers (Sony SmartBand), alongside accessories and software for the devices. Sony Mobile had research and development facilities in Lund, Sweden; Beijing, China; Tokyo, Japan; and San Francisco, United States. At its peak in 2007, Sony Ericsson, Sony Mobile's predecessor, held a 9 percent global mobile phone market share making it the fourth largest vendor at the time. In 2017, Sony Mobile held less than 1% global market share but 4.8% in Europe and 16.3% in Japan.
Title: ST-Ericsson
Content:  ST-Ericsson was a multinational manufacturer of wireless products and semiconductors, supplying to mobile device manufacturers. ST-Ericsson was a 50/50 joint venture of Ericsson and STMicroelectronics established on 3 February 2009 and dissolved 2 August 2013. Headquartered in Geneva, Switzerland, it was a fabless company, outsourcing semiconductor manufacturing to foundry companies. Both Ericsson and STMicroelectronics appointed four directors to the board with Hans Vestberg, President and CEO of Ericsson, serving as the chairman of the board and Carlo Bozotti, President and CEO of STMicroelectronics, as the vice-chairman.
Title: Ericsson
Content:  Telefonaktiebolaget LM Ericsson (lit. "Telephone Stock Company of LM Ericsson"), commonly known as Ericsson, is a Swedish multinational networking and telecommunications company headquartered in Stockholm. The company sells infrastructure, software, and services in information and communications technology for telecommunications service providers and enterprises, including, among others, 3G, 4G, and 5G equipment, and Internet Protocol (IP) and optical transport systems. The company employs around 100,000 people and operates in more than 180 countries. Ericsson has over 57,000 granted patents. Ericsson has been a major contributor to the development of the telecommunications industry and is one of the leaders in 5G. The company was founded in 1876 by Lars Magnus Ericsson and is jointly controlled by the Wallenberg family through its holding company Investor AB and the investment company Industrivärden. The Wallenbergs and the Handelsbanken sphere acquired their voting-strong A-shares, and thus the control of Ericsson, after the fall of the Kreuger empire in the early 1930s. Ericsson is the inventor of Bluetooth technology.
Title: Ericsson Mobile Communications
Content:  Ericsson Mobile Communications AB was a subsidiary of Ericsson, entirely focused on development of mobile phones (handsets). The major offices were located in Lund, Kumla, Raleigh, North Carolina and Lynchburg, Virginia.
Title: Ericsson Mobile Communications
Content: Production and design of mobile phones was transferred to Sony Ericsson Mobile Communications in a joint venture with Sony. Sony Ericsson at this time had some 3,500 employees. ; Mobile platforms, i.e. software and hardware used as a foundation for building mobile phones, were transferred to a new company called Ericsson Mobile Platforms (EMP). Some of the customers of this company was to be HTC, LG, NEC, Sagem, Sharp and of course Sony Ericsson. The main focus in this company would become to produce a mobile platform for third generation mobile telephony, UMTS. As a last countermeasure to counter the economic crisis, Ericsson had to seek a partner for the handset production, and therefore the company was split in two parts the 1st of October 2001:  In February 2012 Sony communicated that they closed the purchase of Ericsson's part of Sony Ericsson, which was consequently renamed Sony Mobile Communications. At this time the company had roughly 8,000 employees globally. February 12, 2009, Ericsson issued a press release stating that Ericsson Mobile Platforms would be joined with STMicroelectronics mobile platform company ST-NXP Wireless, forming the new joint venture ST-Ericsson, owned 50/50 by Ericsson and STMicroelectronics.
Title: Sony Mobile
Content:  In 2009, Sony Ericsson announced that it was moving its North American headquarters from Research Triangle Park, North Carolina to Atlanta. The headquarters move was part of a plan to reduce its workforce, then 10,000 employees, by 20%. As of that year, Sony Ericsson had 425 employees in Research Triangle Park; the staff had been reduced by hundreds due to layoffs. Stacy Doster, a spokesperson of Sony Ericsson, said that the proximity to Hartsfield-Jackson Atlanta International Airport's flights to Latin America and the operations of AT&T Mobility influenced the decision to move the USA headquarters. Sony Ericsson will close the Research Triangle site. On August 23, 2012, Sony announced heavy cuts of their work force in Lund, Sweden. In September 2014, Sony announced taking a €1.3 billion impairment charge on the Sony Mobile division and cutting another 15% of jobs - equivalenting about 1000 employees - at Sony Mobile.
Title: Sony Mobile
Content:  Swedish company Ericsson had been making mobile cell phones since the 1980s, their first very handheld device being the Hotline Pocket introduced in 1987. In the United States, Ericsson partnered with General Electric in the early nineties as Ericsson Mobile Communications (ECS), primarily to establish a US presence and brand recognition. General Electric eventually left the joint venture. Ericsson had decided to obtain chips for its phones from a single source—a Philips facility in New Mexico. On March 17, 2000, a fire at the Philips factory contaminated the sterile facility. Philips assured Ericsson and Nokia (their other major customer) that production would be delayed for no more than a week. When it became clear 
Title: ST-Ericsson
Content:  Ericsson Mobile Platforms had been formed in 2001 from Ericsson Mobile Communications during the European telecom crisis around the year 2000. It was a pure platform company after the transfer of all handset products to SonyEricsson, later Sony Mobile. At the forming of ST-Ericsson, Ericsson Mobile Platforms had roughly 3100 employees. Some of EMPs customers were Flextronics, HTC, LG, NEC, Sagem, Sharp and of course Sony Ericsson. The main focus in the company was for the eight years it existed, to develop a platform for UMTS. Their main development centers were situated in Lund, Sweden and with other three developments centers in Basingstoke (UK) and Research Triangle Park, North Carolina (US), and Nuremberg (Germany). In addition, it had R&D, sales and customer support teams in Tokyo (Japan), Shanghai (China), Taipei (Taiwan), Seoul (South Korea), Grimstad (Norway) and Nuremberg (Germany). It provided mobile terminal technology to customers who wanted to develop and produce mobile phones for the GPRS, EDGE and WCDMA mobile standards. EMP and, Ericsson as a whole, donated resources to standardization bodies such as 3GPP, OMA, JCP and OMTP.

Question: where is the sony ericsson company?
Answer: London.