Hi, I'm new so don't shoot me if it's a stupid question or if I'm in the wrong place!

I live in the UK but I'm in the states at the moment, and I'm being tempted by an iPhone...I'm with Orange at the moment and I'd like to use this sim card in the phone, I was wondering if there'll be an "easy" and perhaps better way to unlock the iPhone in say a month or two and whether it would be worth purchasing one now?

Also, I have no idea about sim cloning etc how hard is it to use this method for unlocking the device?