The first generation is analog technology, that is, the mobile phone is the generation of mobile phones, which has long since completely withdrawn from the historical stage.

The second generation is digital cellular technology represented by gsm and cdma, and it is forbidden to join gprs, edge, cdma 1x and other data service networks.

The third generation is the mainstream network technology of wcdma, tdscdma and cdma2000.

The fourth generation is what we call 4G, or LTE, and it is also the most advanced technology in business at present.

The fifth generation is still under study, and it is expected that the system can be commercialized around 2020.