After the early 1970s, Bell Labs, the concept and related theoretical coverage cells of the cellular system, the rapid development immediately, and soon entered the practical stage. In a cellular network, each geographic scale (usually a medium-sized city and its suburbs] has a plurality of base stations, and controlled by a mobile telephone exchange in the car anywhere within this area of ??the mobile station, the mobile phone After the acquisition of radio channels available via shell and switch public telephone network connectivity oppoR3, truly anytime, anywhere with a mobile phone can be anywhere in the world. At the same time, between two or more mobile switching office, as long as the same standard, but also Automatic and semi-automatic switching can be performed, thereby expanding the range of motion of the mobile station. Thus, in theory, a cellular mobile telephone system can accommodate an unlimited number of users. The first-generation analog cellular mobile telephone system is a cellular phone after a large number of mobile telephone system Shell acquisition, the main feature is to use analog transmission of analog signals after the shell acquisition of Samsung A7, the United States, Britain and Japan have developed their own systems. In 1975, the Federal Commission opened up the mobile phone handset market to determine the land mobile phone handsets and high-capacity cellular mobile telephone spectrum for mobile phone commercially ready. In 1979, Japan opened the world's first cellular mobile telephone network. In fact, the world's first mobile phone phone system in 1978 in the United States After the acquisition of Chicago opened the shell, but cell phones come from behind, in 1979, made six analog cellular mobile telephone system in the Chicago trial, and finally in December 1983 business people in the United States to vote. With this great idea mature, Morse successfully used current 'pass' 'OFF' and 'long break' instead of the human character is transmitted, which is famous Morse code. In 1843, Morse won three million dollars in funding, he used this money to build from Washington to Baltimore became telegraph lines, total length of 64.4 kilometers. May 24, 1844, in a packed Capitol, Morse was some excitement with his trembling hands, manipulating him more than ten years of effort devoted to the successful development of the telegraph, to 64 kilometers outside of Baltimore sent the first telegraph in human history, God created what miracle! 'shell after the acquisition of Samsung Electronics A5 _ Obo (certification) _ After the acquisition of Heilongjiang shell provided by the Shenzhen Aobo Electronic Technology Co., Shenzhen City Aobo Electronic Technology Co. (www.aobodz.com) is Shenzhen, the other leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs in Obo e-leadership with the staff warmly welcome all inquiries negotiations to create a better future for electronic Obo.