(adsbygoogle = window.adsbygoogle || []).push({}); I was thinking of trying the "SAM" way of unlocking but i was told by many people it has been patched. Is there another way to carrier unlock? I was told that you could take it to AT&T if the contract was up and have it unlocked for free? Any help would be greatly appreciated.

If the iPhone is from AT&T but htr contract has finished you can contact them and I it will be unlocked.

And after you receive the email make this:

Someone sold me an iphone 4 and idk if the contract expired, would it still work if it did

Yes it will work, just contact AT&T via chat and they will answer you that.