Which country invented the dual-card mobile phone?

Hong Chuantian, a patent inventor, was born in Taiwan Province Province and obtained a patent in China in 2003. He returned to China in 2004 to investigate the mobile phone market. At that time, about 90% of the total sales volume in the domestic mobile phone market was occupied by overseas brands, mainly because the mobile phone industry in China lacked intellectual property rights with independent functions. In 2005, Hong Chuantian invested in the patent intellectual property rights of dual-card dual-standby mobile phones in China, hoping to build a multi-cartoon mobile phone with independent intellectual property rights of China brand, which sold well all over the world. On September 1 day of the same year, a new invention conference was held in Shanghai Asia Regal Hotel. In 2006, Global Online (Beijing) Technology Co., Ltd. was established in Beijing. In 2007, he won the first place in the World Mobile Phone Exhibition in China, Shenzhen and Tianjin. At that time, several well-known overseas brands were interested in authorizing cooperation. Only South Korean Samsung flouted China's intellectual property rights and launched a large number of infringing dual-card dual-standby mobile phones. The lawyer letter of Global Online (Beijing) Technology Co., Ltd. informed South Korea's Samsung Company of infringement, and South Korea's Samsung replied that it agreed to negotiate and the two sides signed a confidentiality agreement. Content of negotiation: If negotiation fails, Global Online (Beijing) Technology Co., Ltd. cannot publish its infringement in the media and online for three years. After the bookmark of confidentiality agreement was set, South Korea's Samsung immediately argued that there was no infringement. At that time, the inventor knew that he had been cheated by the Koreans. South Korea's Samsung is rich and powerful, and the lawsuit against China's patent is invalid. In 2009, Zuo Yi, Zhang Lin and Leo, presiding judges of the National Intellectual Property Reexamination Board, actually declared their own patents in China invalid, which made Samsung successful. Beijing No.1 Intermediate People's Court decided on 20 10 to revoke the decision of the Patent Reexamination Board of the State Intellectual Property Office on the request for invalidation of this patent. In the past five years, South Korea's Samsung has resorted to unscrupulous means, which led to the misjudgment of the case by the State Intellectual Property Reexamination Board and the Beijing High Court. The case has been put on file for retrial in the Supreme People's Court.