How do I get a Subsidy Unlocking Code for a Sprint Samsung Instinct phone?

My wife was given a Spring Samsung Instinct on the Oprah show yesterday. Our service provider is AT%26amp;T. I need to get the subsidy unlocking code to be able to change providers.|||Unfortunatley you won't be able to do that - the instinct is a CDMA phone (it does not use simcards) and can't be unlocked AND AT%26amp;T is a GSM carrier (it uses simcards)...Since both of them use different technology so there is NO way you can use the instinct with Sprint. You can only get GSM phones such as those from T-Mobile and get them unlocked to make 'em work with AT%26amp;T. Hope this helps.|||Might be better off selling the phone to make a lot of money.No chance of being able to unlock it.