The basic concept of mobile phone system is the transmission of information carried by some media. In ancient times, people through the post, IP Messenger, flames, etc. for alarm messaging. Today, with the rapid development of science level, have appeared in radio, fixed telephone, mobile phone, Internet, mobile phones and other ways videophone. Mobile phone technology has shortened the distance between people, improve economic efficiency, profoundly changed the way people live and the social landscape. The purpose is to pass the phone message, the message having a different form, such as language, text, data, images, symbols, and so on. With the development of society, more and more types of mobile phone accessories message recovery, people passing messages are increasingly high requirements. Phone message delivery is carried out by the signal recovery Which mobile phone accessories, such as traffic light signals, smoke signals, voltage and current signals, such as the best cell phone accessories recycling, is the carrier of the message signal. Generally cell phone refers to the use of electronic and other technical means, by means of an electrical signal (including light signals) from one place to achieve effective delivery of messages to the other, i.e. the exchange and transfer of information. This phone has a fast, accurate, reliable, and almost no time, place, space, distance limitations, which has been the rapid development and wide application. Typical of the first generation of mobile phone systems in the United States six 1 ^ 1? 3 system and subsequently improved system Ding eight 08, as well as small and XV \ Tintin etc. Advanced Mobile Phone System) using analog cellular transfer 'to lose 800 high-band mobile phone accessories recycling, widely used in the Americas and parts of the Pacific Rim countries; Ding eight people omnidirectional mobile phone network system) is the 1980 European standard analog mobile phones , analog mobile phone standard is also used in our 80s, the use of 900 bands. Sweden Nordic also opened XV D ("in the mobile phone) systems, Germany opening 0-450 system. The first-generation analog mobile phone system standard to eight technology-based second generation mobile phone system is to transmit voice and data-based digital mobile phone system, a typical system has 031 ^ 1 (using small way 0X4 eight eight eight ... ??, 13-95001 ^ eight, and Japan is now renamed as? 00 and other digital mobile phone system .20 In addition to providing a voice phone services, also provide low-speed data services and short message service. Global System for Mobile> series are 031 ^ 1900,0031800 and? 031,900 of three parts, the main difference between the three is working band The differences of its characteristics can be summarized as follows: ^ high spectral efficiency: As a result of efficient modulation, channel coding, interleaving, balance and speech coding technology, the system has a high spectral efficiency of mobile phone accessories recycling company _ Obo Electronics (certified) _ Lotus phone accessories recycling provided by Shenzhen Aobo Electronic Technology Co., Ltd. Shenzhen Electronic Technology Obo (www.aobodz.com) is Shenzhen, the other leaders, over the years, the company is implementing the scientific management, innovation and development, honesty and trustworthiness guidelines, and satisfy customer needs. In Obo electronic leadership with the staff warmly welcome all inquiries negotiations to create a better future for electronic Obo.