You can't make phone calls and send short messages to surf the Internet when your mobile phone has a 2g signal, but you can do anything when you have a 3g signal. That's why. /Why is this?

First of all, 2G is the GPRS Internet access we used before, which is relatively slow. The fastest I can see is above 20 kb/s, and sometimes watching news or pictures is slow.

With the development of the information age, people have higher and higher requirements for wireless communication, and the emergence of 3g has also met most of people's requirements. Through 3G, you can get a smoother online experience. We can video chat and watch videos online through the front camera of some mobile phones. The internet speed has been greatly improved. So in theory, 3G consumes more traffic, but if you browse the web and look at news pictures, it should be similar to the traffic consumed by 2G. Because the size of the transmitted data is similar. In addition, you can also save traffic through excellent mobile browsers.

Regarding domestic 3G, the mobile technology is TD-CDMA, which is a set of technical standards formulated by our country. Unicom's WCDMA is a mature technical standard widely used in Europe and America, which is a great advantage. Because when 3G was first introduced in China, China Unicom had considerable advantages in the variety, quantity and quality of 3G mobile phones. There are few types of mobile phones, but now mobile is narrowing the gap with the support of financial strength and policies. There are also a lot more models. Telecom is Tianyi, that is, the introduced CDMA2000 technical standard, and there are also some markets abroad. Before telecommunications, it was also stressful to get involved in mobile communication, but the price was relatively low and the tariff was cheap, so it was also favored by some people.