Questions about 3G phone support?

For 3G mobile phones, the standards of the three operators are different.

If it is mobile, you have to make TD's mobile phone, and you must also change the number of 188. TD's 3G network is only available in a few countries in Africa and South Asia, and is currently available in eight cities in China.

Telecom, CDMA2000 standard, the original number does not need to change the number, do not need to change the card. America, Japan and South Korea are of this system, and more than 100 cities in China are available.

Unicom has not yet come out, it is a WCDMA standard, and it is used by European countries. The specific use method has not yet been introduced.

China Mobile, China Telecom, and China Unicom all have their own 3G standards, but they are different.

If you buy a 3G mobile phone in the WCDMA standard, of course, you can only use the 3G network of China Unicom, but you can use the mobile 2G network.

The mobile TD-SCDMA system is generally not visible on the mobile phone market, so go to the mobile business hall to buy it.

The mobile phone communication technology you are using now is 2G, 3G is the third generation, and 2G is the second generation. There is nothing special about what 3G must be and what 2G must be. The ITU (International Telecommunication Union) thinks you are the first generation, so it approves you as the first generation of technology.

The general parallel mobile phone supports mobile 2G communication, but 3G is connected.

2G is the network we use now.

The reasons why mobile phones have always been 3G and the solutions are as follows:

1. The 4G signal in the ground is not covered, only the 3G signal is covered. So, the phone can only use 3G signal.

2. Change the mobile phone network type setting. If the mobile phone network type is set to only use the 3G model, then the mobile phone will turn off the 4G Internet access and only use the 3G landfight network. In this case, you can change the network type in the phone settings, change it to 4G priority, and you can resume 4G Internet access.

3. The mobile phone system is abnormal. In this case, you can restart your phone.

3G (3rd-generation) refers to cellular mobile communication technology that supports high-speed data transmission, and is the third generation of mobile communication technology. Its rate is generally more than a few hundred kbps, and it can transmit sound and data information at the same time. At present, there are 3 standards for 3G:

CDMA2000, WCDMA, TD-SCDMA, the mainstream of the industry is CDMA technology.

It's just that you can use the 3G network.