iPhone Any advide on transfering iphone contacts to itunes?

[yout]

So here's the thing, I accidently spilled water on my iphone 4, although it has been fixed, it still get kind of "unstable", sometimes it just suddenly shut itself down.
Now I'm saving money for the new iphone 5, but I have a pile of important contacts saved on my watered iphone 4 and I'm so afraid that they'll be gone with the damaged phone right before I could get a new one. But if I can copy these contacts to itunes, then next time I'll be able to transfer them to the new iphone,right? Or just copy to computer? Any difference?
Anyway, I just want the contacts to be backuped, any good idea? I don't mind if I have to pay for something but it would be the best if there's a free and easy way.Help me please.

[hrosvit]

Who is your provider? Verizon provides free contact back-up, which you then just download to your new phone. I would imaging some other providers do also. Would that solve your problem?

[greenyouth]

Have you tried copying it to your computer?

[jennysimpson]

If you want to backup your iphone contacts to itunes all you have to do is connect your phone to your pc, wait until iTunes recognizes your phone once it was already detected right click on the name of your device on itunes and click backup.