If anyone has one they are probably still using it, this card DOES NOT unlock your iPhone, it fools it into thinking it is unlocked, but has to be left in the sim tray, with the sim you want to use, in order for it to work.
You can either Jail Break your phone or it can be unlocked properly by most networks for under £20. I did make a post a few months ago listing exactly how to do this as I was concerned that a certain market store was charging customers over £60 for this, even if they didn't get it unlocked. Unfortunately the thread was hijacked by someone, who constantly promotes this particular market store, giving details how to Jail Break a phone, which wasn't what my thread was about.
If you want a link to it (the first post explains it all) just ask.