What is 4G? What's the difference between 3G, 2G, 1G?

The definitions, service characteristics, speed and service advantages of 4G, 3G, 2G and 1G are as follows: the definitions of 1 .4G, 3G, 2G and 1G: 1, 4G: the abbreviation of the fourth generation mobile communication and its technology, and the download speed of the 4G system is/kloc-0. 2.3G: It is the third generation mobile communication technology. Compared with 2G and 1G, China Telecom's 3G is a new generation mobile communication network with wider bandwidth and wider coverage. It can provide the highest data transmission capacity of 3. 1Mbps downlink and 1.8Mbps uplink. 3.2G: the abbreviation of the second generation mobile communication technical specification. 2G mobile communication system transmit voice in digital mode. In addition to the call function, some systems also introduce the short message function. In some 2G systems, data transmission and fax are also supported, but because of its slow speed, it is only suitable for information such as e-mail and software with small transmission volume. 4. 1G: it is the abbreviation of the first generation mobile communication standard, and the most famous product is mobile phone. It was used from 1980 until it was replaced by 2G digital communication. Second, business features 1, 4G: (1) China Telecom's 4G technology is backward compatible with 3G and 2G. In areas without 4G network coverage, 3G and 2G networks can still be used to make phone calls and surf the internet; (2) When using a 4G mobile phone, the user's call is still conducted through a well-covered 2G network, and the call quality has not changed; (3) (3) The 4G network adopts advanced security technology, and the user information in the signals transmitted in space is also encrypted, so the security is extremely high. 2.3G: Compared with 2G and 1G, it is a new generation mobile communication network with higher speed, wider bandwidth and widest coverage. 3.2G: It is a digital cellular mobile communication system. Low data service and confidentiality are greatly improved compared with the first generation. 4. 1G adopts cellular telephone standard. Small business volume, poor quality, poor security, no encryption and slow speed. 3. Uplink and downlink rate 4G: uplink rate (bps): 50m; Downlink rate (bps): 100 m3 g: Uplink rate (bps):1.8m; Downlink rate (bps): 3. 1m2g: uplink rate (bps); 2.7K downlink rate (bps): 9.6k 1g: uplink and downlink rate (bps): (At that time, there were no Internet resources, and there were no corresponding networks for uplink and downlink. Advantages of 4G: Compared with 3G, 2G and 1G, 4G has the characteristics of fast Internet access, short delay time and lower traffic price, and can effectively realize high-speed data services in the mobile state. With the development of China's 4G construction, it can not only better meet the needs of mobile users for high-speed wireless Internet access, but also promote the continuous deepening of the application of mobile Internet services and the continuous expansion of information services in industries such as mobile production and office, mobile e-commerce, mobile transportation and logistics, and smart home. And will give birth to more business forms and service models, so that more users can share the effects brought by 4G. For more service benefits, click on "official website" customer service 34 below to answer your questions.