The phone has two internal interfaces available. One is a serial connection and the other is a USB connection. The cables you can get usually have USB on one end, and then connect to the serial or USB connection on the other end. USB to serial cables also typically have a plastic blob in the middle which contain the USB to serial conversion chip.
DO NOT PURCHASE A STRAIGHT USB CABLE. The internal USB interface on the phone has issues that results in data stalls and other instabilities. If you decide to use any form of straight USB cable with the VX4400 then do not ask for support with BitPim or on any other support forums. The cable will initially appear to work, but you will eventually have problems. Many people seem to think that because it initially appears to work, this issue does not apply to them. When they hit the problems, they post to the various forums. Many members of the forums get very annoyed seeing the same thing crop up over and over again. You have been warned!
Available at RadioShack as catalog# 17-789 marked as for LG 5350 and VX4400.
This cable connects to the USB interface inside the phone. The cable is marked as for the LG VX4400 and the LG 5350.
Available at RadioShack as catalog# 17-783 marked as for LG VX1/VX10.
This cable has a blob half way along the cable that converts from USB to serial and then connects to the serial interface in the phone. The chip inside the cable is a Prolific 2303 and this is how your operating system will report it. It is marked as for the LG VX1/10 but works fine on the VX4400.
Sometimes the phone does not respond when using this cable, and has to be manually forced to talk. Do this by Menu 8-Settings 6-Data Settings 2-Select Port RS-232C(COM Port)
This cable works well and is reliable. You will need to obtain the drivers from FutureDial's website. Note that you should select LG VX10 in their installer.
Linux has drivers builtin. Note: There is a bug in the Linux 2.4 kernel that causes many machines to crash when any program stops using the cable. This has been fixed in the kernel versions 2.4.23 and 2.6.
You will need to get drivers from the Prolific web site at http://www.prolific.com.tw/eng/downloads.asp?ID=31
The default speed the diagnostics interface runs at is 38400. You can increase this to 115200. Do this by Menu 0-Service Menu (Service code, usually 000000) 5-Data 4-Diag Baud. You need to reboot the phone for the change to take effect.
BitPim Online Help built 17 January 2010