Ericsson 1876 was founded in Stockholm, Sweden. From the early production of telephones and program-controlled switches to the largest mobile communication equipment manufacturer in the world today, Ericsson's business covers more than 80 countries and regions around the world.

Ericsson's global business includes: communication network system, professional telecommunication service, patent authorization, enterprise system, operation support system (OSS) and business support system (BSS).

Extended Data 2G: China enters the era of digital mobile communication.

In the late 1980s, the then Ministry of Posts and Telecommunications of China began to study digital mobile phone technology. Ericsson provided a wide range of information and suggestions, and organized several seminars to introduce the technology and market situation, helping the Ministry of Posts and Telecommunications to compare GSM and AMPS technologies. Finally, the Ministry of Posts and Telecommunications, the Ministry of Science and Technology and other relevant departments have determined the selection criteria of China's 2G system.

1994 China Unicom was formally established and began to use GSM technology. At the same time, when China Telecom changed from TACS system to GSM system on 1995, Ericsson * * * enjoyed its skills and experience in GSM field, which greatly promoted the application of GSM technology.

Baidu Encyclopedia-Ericsson