I have a USB data cable that I use with Samsung's buggy EASYGPRS 2.18
software. The cable came with a software driver that emulates a com port since EASYGPRS does not support USB transfers, only COM and infrared.
So after you install the driver, you should see a new virtual com port listed
in EASYGPRS.
EASYGPRS is free from
www.samsung.com, the cable is not available from
them you should be able to get it from your local cell phone vendor or
they can order it for you.