1G, 2G, 3G, 4G mobile phones, what do they mean?

1G is the representative work of analog signal: mobile phone 2G is a digital signal, and its main purpose is that mobile phone can send short messages. 2G can be divided into 2.5G and 2.75G, mainly through GPRS and 2.75G through EDEG and CDMA technologies. Internet access is getting faster and faster, such as MMS, CRBT, game download and so on. At present, the functions of 3G on your mobile phone are mainly three international standards: CDMA, WCDMA, TDSCDMA. The main difference is that the transmission speed has become faster, up to 2M. At present, 4G such as video, streaming media, GPS and online live broadcast is still in the research and development stage, and the transmission speed is higher. Here I just make a simple and easy-to-understand introduction, like the technical things inside can be seen on the Internet.