Better quality phone system: a soft switching technology (connect to disconnect) can overcome the disadvantages of hard switching easily dropped calls, 00 ^ 1 six systems operating on the same frequency and bandwidth, the system is easier to achieve soft switching technology to improve phone quality. The system uses to determine the vocoder rate adaptive threshold technology, powerful error correction, soft-switching technology and rake diversity receiver that provides Ding 0? ^ Six systems can not be compared, high quality phone. ^ Frequency planning flexible: the user to press a different serial number to distinguish the different [eight carriers may be used in the adjacent cell, and therefore the frequency of 001 ^ eight network planning flexible, easy expansion. ^ For multimedia mobile phone system six systems can easily use multiple 00 ^ 1 eight-channel mode and multi-mode 001 ^ eight frames, multimedia messaging different rate requirements, handling and synthetic manner than the small one way and 01 ^ Eight flexible, simple and beneficial application of multimedia mobile phone system. Third-generation mobile phone system to play 31! 00,30 Huawei handset recycling, also known as the European Union's telecommunications giants claimed it as 01 ^ 1 D Universal Mobile Phone System>. It is possible to voice phones and multimedia phones combine Samsung S6 handset recycling, its possible value-added services will include images, music, web browsing, video conferencing and other information services. 30 means the globally applicable standards, new services, greater coverage, and more spectrum resources to support more users. ^ 30 system with the existing 20 systems have fundamentally different. 30 system uses (technology and packet switching technology handset recycling, technology and circuit instead of 20 systems commonly used switching technology. In the circuit-switched transmission mode, regardless of whether the two sides talk talk, remain open during the on line, and bandwidth compared with the current 20 systems, 30 will support more users and achieve higher transmission rates .30 information transmission rate of the system can be achieved in high-speed sports, professional handset recycling, walking movement reaches 3841, when indoor sports up to 2 to cover the basics of the phone, and recalled the development history of mobile phone technology; the main principles and characteristics of wired, wireless and microwave transmission; all kinds of switching technology development and evolution; the concept of network access and related application methods From the basic concept of mobile technology and mobile phone systems point of view, recalled in the beginning of the current generation of mobile phone technology for centuries the most representative types of phone mode, to lay the foundation for future learning. twisted pair, coaxial cable, optical fiber, optical cable other common cable transmission, and its physical characteristics, operational transmission capacity, anti-interference ability and so do a detailed analysis of Apple 6 handset recycling _ Obo Electronics (certified) _ Gansu handset recovered from Obo Shenzhen Electronic Technology Co., company Shenzhen City Aobo Electronic Technology Co., Ltd. (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.