What does 3G and 1X mean for telecom smart phones?

3G is connected to the telecom 3G network.

1x is connected to the 2G network of China Telecom.

1. Telecom mobile phone display 3G is connected to the telecom 3G network, network mode CDMA2000.

2. Telecom mobile phone display 1X is connected to the telecom 2G network, network mode CDMA, network frequency band CDMA1X.

3. The switching between the 3G network and the 2G network of the telecom mobile phone is automatically selected by the mobile phone and cannot be switched manually.

1. When the 3G signal of China Telecom is weak or not, it will automatically jump to the 2G network of China Telecom and the "1X" symbol will appear. As long as you return to a place with a strong 3G signal, you will jump back to the 3G network.

2. When receiving **, the mobile phone only uses the telecom 2G network. **After playing, you will soon jump back to the 3G network.

The 3G logo means that your mobile phone has received the 3G signal from China Telecom and can use the 3G signal to surf the Internet. 3G network CDMA2000.

The 1x flag means that the phone is currently receiving 1x network, such as your phone does not support 3G function. It is also possible to use 1x to surf the internet, but it is slow. Telecom 2G network CDMA1X.

If both signs appear on the phone, the default is 3G priority.

CDMA2000 (Code Division Multiple Access 2000) is a 3G mobile communication standard, a radio interface recognized by the IMT-2000 standard of the International Telecommunication Union (ITU), and an extension of the 2G CDMAONE standard. The fundamental signaling standard is IS-2000. The CDMA2000 is not compatible with another 3G standard, WCDMA.

It is the name used by the TIA standards organization to refer to the third generation of CDMA. The TIA specification for 3G CDMA is called IS-2000, and the technology itself is known as CDMA2000. It is also a standard recommendation for the third-generation mobile communication air interface proposed by the United States to the ITU, and is a technical system plan for the evolution of IS-95 to 3G.

The path from CDMAone to 3G is as follows: IS-95A, IS-95B, CDMA20001X, and the technical details of the standard are mainly organized by 3GPP2.

CDMA1X refers to the first phase of CDMA2000 (higher than IS-95 and lower than 2Mbps), with a forward link data rate of 144Kbps, packet switching in the network part, and mobile IP services. Among the international proposals for radio interfaces for third-generation mobile communications, the most widely noted are W-CDMA and the proposal of the United States to the ITU for the third-generation mobile communication air interface standard, which is the technical framework for the evolution of the IS-95 standard to the third generation. CDMA1X adopts a spread spectrum rate of SR1, which refers to a single-carrier direct series spread spectrum mode with chip rates for both forward and reverse channels.

As a result, it is conveniently backward compatible with IS-95(A B) for a smooth transition. Because CDMA1X adopts reverse coherent demodulation, fast forward power control, send diversity, Turbo coding, etc.

First of all, your phone needs to support Telecom CDMA 2000 3G network, if your phone supports it, you can select CDMA Auto in Mobile Network Settings - Mobile Network --- Network Type. Or enter * in the keypad, select Mobile Info in the pop-up message--- set your preferred network type: CDMA Auto.

Anhui Telecom's online business hall Tianyi New Year celebration activities are ongoing, a variety of star machines are historically low-priced, large-screen smart phones are discounted**, and there is a chance to get an iPad mini for broadband!

If you still have questions, please keep asking. Have a great day, thank you!

When the 3G signal quality of the mobile phone is not good, it will automatically convert to 2G signal, which is 1X