Unlock the I-Phone

Hi there,
I have just bought a iphone but i don't know how to unlock it Can you help me?
Thanks ,

---

› See More: Unlock the I-Phone

Thanks for your answer but when I search by Google,It shows many results and there is no any detail way or method to solve my problem. Share your experience to everyone.
Thanks,

you bought a iphone that was locked to a certain carrier and now you want to unlock it to use on another carrier...is that what your saying?

Did you buy this off ebay?

I guess i'm lost as to why you'd buy a phone that wasn't made for your carrier or unlocked from the start?