COM interface and USB interface
1, COM interface, also called serial port, is connected to the back of the desktop computer and is currently being eliminated. The advantage is the low price, support Brush machine (some phones can only use the serial line brush machine); disadvantage is the disassembly extremely inconvenient, does not support laptops, transfer speed is relatively slow.
2, USB interface is the mainstream, the advantage is easy and fast and stable, support all types of computers; disadvantage is with the IC (central control chip) the price slightly higher, while some other data lines do not support Brush function.
Other categories
Without IC (Central Control Chip); With IC (Central Control Chip); Special Chip.
1, without IC (Central Control Chip): There is no central control chip, you must plug the phone to recognize the line computer, the price is cheap.
Typical models: Samsung CDMA series, D500 series; Motorola E398 series, V3 series; Nokia DKU-2; NEC N720 series; Siemens 65 series and so on.
2, with IC: with the central control chip, ordinary chip models 2303,2101,3116, do not plug the phone will recognize the computer line, because the price of an IC is 10 yuan, so the price is more expensive than without IC. The working principle of the data line with the chip is USB to COM, the USB interface into a serial port on the computer display.
Typical models: Samsung E638 series, D418 series; NEC N610 series; Siemens 25 series, 55 series; Sony Ericsson mobile phone data cable; Panasonic mobile phone data cable; Lenovo mobile phone data cable and so on.
3, special chips: non-ordinary popular chips, special special chips such as: DKU-5, CA-42, DCU-11 and so on.
Note: We do not mistakenly believe that the quality of the IC with good, without the poor quality of the IC, the actual band without the IC is based on the phone's applicable models to production.