Problems with Straight Talk sim card in iPhone4?

I recently purchased a sim card from straight talk wireless, to use in my iPhone 4 (a friend gave me this iPhone as payment for a debt he had amassed with me.) He originally found it at Disney, where the workers told him he might as well keep it. I went to all US providers, and none of them could give me info about the phone, origination, or how to get passed the sim pin lock. After extensive searching online, I found out it originated from Orange Wireless (England). Serial number: GSM (china)16gb iPhone4 Model A1332 EMC 380A FCC ID BCG-E280A IC-579c-E2380a.
To start off, the phone had a sim pin lock, which I could not get around.iTunes also gave me an error message every time I attempted to restore the device. The only way I could get it to boot to the main board was to jailbreak it with Redsn0w b2 (5.1.1.iOS on device) I still have yet to get the iPhone to recognize the Straighttalk sim card. I even restored it after the jailbreak, and it still wouldnt recognize the sim; Even though SAM recognized the sim#. I used unlockit.co.nz to get the APN codes, and then even tried SAM hacktivation, and Tetherme. Still I can't get my iPhone activated on Straighttalk, or even to recognize the sim. When I put the sim card in before the jailbreak, it would always read: This sim card is not supported, please enter a compatible sim card. Yet I have read everywhere of people using the exact same phone on Straighttalk… Yet I've worked for hours and hours, and tried everything I have found online, and still nothing. Somebody please shed some light on my dilemma. I'm hoping there's something sombody knows out there that I'm currently unaware of. It would be greatly appreciated, otherwise I feel like I spent $65 for nothing.

It might not be a usa iphone, meaning its from uk or somewhere and its licked to that country.
if your in PA i have a few factory unlocked iphones i'm selling or tradings… Email me