What happens to the ordinary CDMA unlimited network card after 3G is activated?

1. Whether the automatic upgrade should depend on whether your network card hardware supports EVDO, if the network card hardware does not support it, there is no difference between it and the present after the upgrade, and it has nothing to do with the network card number you use, if you want to use it, you should change the hardware.

3. The EVDO in Beijing should start in early March.

4. The tariff that should be used is the wireless broadband tariff of Tianyi, and you can ask 10000 or the business hall for the specific tariff situation in Beijing.

The state sells Unicom's CDMA to Telecom, that is, the CDMA20000 license of the United States, and the United General WCDMA is the license of Europe and the United States, and China Mobile uses China's independent intellectual property rights TD-SCDMA, so as to form the three major mobile operators after China's reorganization.

If you talk about whether it will be upgraded, you can directly call customer service**! 3G Internet access is very fast, and gaming may not be so smooth! There should be no major changes in the cost, because now the competition between the three major operations is very fierce, and there must be a ** war!

1. Look at what card your network card is. I should have bought a 1x card before. There will be no change in the speed of the data card without replacement.

2. After upgrading to EVDO Rev0 version, the theoretical rate: uplink, downlink, but these are all related to a problem, that is, how many people are surfing the Internet at the same time under the coverage of the base station where you are located,**. In general, the total bandwidth configured in the initial network is not too high.

So if you change to evdoreva and the number of users is not large, it should be no problem to look at the power supply.

3 The tariff problem must be inflated in the early stage of the network. Specifically, it is necessary to consult the service of the operator**.

No, CDMA has 1x and evdo....

EVDO is 3G data-driven.

Voice goes 1x, and generally 3G mobile phones will constantly switch between the two when needed, and the two can be done at the same time. However, the phone is required to support 2 frequencies.

CDMA stands for Code Division Multiple Access. Code Division Multiple Access (CDMA) is a new and mature wireless communication technology developed on the branch of digital technology - spread spectrum communication technology. The principle of CDMA technology is based on spread spectrum technology, that is, the information data with a certain signal bandwidth that needs to be transmitted is modulated with a high-speed pseudo-random code with a bandwidth much larger than the signal bandwidth, so that the bandwidth of the original data signal is expanded, and then modulated and sent out by the carrier.

3G is the third generation of mobile communication technology, which refers to cellular mobile communication technology that supports high-speed data transmission. 3G services can transmit both voice and data information at the same time. 3G is a generation of mobile communication system that combines wireless communication with multi-level communication such as the Internet.

CDMA is a network standard, not the name of China Telecom's 3G network. China Telecom's 3G network, also known as CDMA, uses CDMA2000, or EVDO, to use the ECD standard.

Yes, but the technology is different, mobile 3G uses a technology developed in China, called TD-CDMA, this technology can only be used in China, not abroad. There is no 3G when you go abroad, hehe.

Unicom is WCDMA, which is the EU standard and is also used in the United States.

Telecom is CDMA2000, which is a Japanese standard.

The mobile one is called TSCDMA

Unicom is called WCDMA

The telecom is called CDMA