I have the USB interface data cable for my samsung eternity 2 but i dont know how to use it can any one tell me how it works and what it is capable of

Usually the usb data cable is for transfering pic to and from your phone and compuer,

(EXAMPLE) MINE I PLUG INTO THE COMPUTER THE COMPUTER RECOGNIZES ALL PHONES AS A MEMORY CARD SO I TAKE MY PICTURES(PICS or PIX) OFF THE PHONE,ALSO I CAN ADD PIX TO THE PHONE SO IT SHOWS ON THE PHONE WHEN YOU ARE DONE......

Also you are able to do other things like: add/remove apps( calendars,facebook,yahoo messenger,ring tones,or games on your phone(s)

STEP(S):

1. iNSTALL YOUR SOFTWARE THAT CAME WITH YOUR PHONE(THERE SHOULD BE A CD WITH YOUR PHONE IN THE THE BOX WHEN YOU RECIEVED IT)

2. When it tells you to plug the usb to your phone and computer, your computer will recognize there is a new hardware plugged in the software cd will install the drivers the computer needs to communicate with your phone....

3. Some phone(s) wil self test so besure to watch your screen carefully, there are tutorials in 99% of these programs that can teach you better with hands on type deal... so have fun i did not have any 1 to teach me it was trial&error, but i made it....

*************8WARNING*******************************
PLEASE BE CAREFUL OF THE HACKS YOU CAN FIND ON THE NET IF YOU DONT KNOW WHAT YOU'RE DOING YOU CAN DESTROY YOUR PHONE( IT WILL MAKE YOUR PHONE USELESS PAPER WEIGHT)