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General USB data line
There is no central control chip, you must plug in the phone computer to recognize the line, the price is cheap. The typical models: Samsung CDMA series, D500 series; Motorola e398 series, V3 series; Nokia DKU2; NEC N720 series; Siemens 65 series and so on.

USB data line with IC
With central control chip, the model is 2303, 2101, 3116,, do not plug the phone will recognize the line, because the price of a IC is more than 10 yuan, so the price is more expensive than the IC. Chip data line working principle is the to COM USB, the USB interface into a serial port on the computer display.

Samsung E638 series, D418 series, series, N610 NEC series, SIEMENS 25 series, 55 series; Sony Ericsson mobile phone data line; Panasonic mobile phone data line; lenovo mobile phone data line and so on.

Special USB data line
The popular non ordinary types of special chip, chip such as DKU5, CA42, DCU11 etc..

Note: we do not think that the quality of IC with good quality, without the quality of IC is poor, the actual band without IC is based on the application of mobile phone models to production.

USB2.0 and 3
USB3.0 is by Intel, Microsoft, HP, TI, NEC, ST-NXP and other industry giants composed of USB3.0 promotion group announced in November 18, 2008 has been officially completed and published USB3.0 standard. USB3.0 standard provides ten times the transmission speed of USB 2 and higher energy efficiency, can be widely used for PC peripheral equipment and consumer electronics products. The bandwidth of the USB3.0 interface is increased to 5Gbps, while the theoretical bandwidth of USB2.0 is 480Mbps. All the high-speed USB2.0 equipment to get USB3.0 up will have a better performance.

USB2.0 data line
1 USB3.0 data bandwidth is ten times the USB2.0, you can reach 5Gb/s (480MB/s), synchronous transmission bandwidth can reach 384MB/s, which is one of the main differences between USB3.0 and 2;
2 low power consumption (in the 20MB/s data transmission is about 25% less than the power consumption of USB2.0);
3 USB3.0 than 2 more energy saving, for the time being in the waiting state of the device, you can use the power saving mode;
4 USB3.0 can provide greater power through the cable (2.5W to 4.5W);
5 USB3.0 is down compatible, support for USB2.0 devices, but USB2.0 is not supported by USB3.0.

USB3.0 data line
USB cable to improve power means that people can use it to charge the laptop.