How to unlock an iphone from Orange?

I bought an iphone 4s off gumtree and its locked to Orange.anyone know Where and how I can unlock it? And is it expensive?

I can unlock it for you, send me email if want to.mixacase@gmail.com

Hi you can easily unlock your iphone 4s from orange network lock with the help of providers like http://www.mobileunlocksolutions.com/apple-iphone-4s/rs16wp9/ here they will unlock your iphone 4s using remote unlocking service for affordable cost…

The cost depends. You can get lots of those tutorials for free on the web. Just search for a better one and unlock your's.

Talk to Orange
and pay the 15-20 pounds that Apple ask for to unlock it (officically)
You will probably have to put a PAYG Orange SIM in it, so that they can send the unlock code to it, but hey that only needs to be a free SIM with a pound or so on it.

or maybe Apple will do it