Lg kp500 unlocking Sim card?

I don’t want to pay 18 quid to unlock my orange phone to o2 but i seen a Sim card on eBay that seems to keep your phone unlocked by putting your Sim card over it and placing it in your phone, would this work? and has any of you ever tried one?

here is the link:http://cgi.ebay.co.uk/NoCut-Mobile-Cell-Phone-Universal-Unlock-Turbo-SIM-Card_W0QQitemZ320502741109QQcmdZViewItemQQptZUK_Mobile_Home_Phones_Sim_Cards_CV?hash=item4a9f73b875

Thanks very much for your help.