Anyone wants a free iPhone 4, you have to look here. This is real, definitely not a scam.
All you have to do is to register here (http://apple.freebiejeebies.co.uk/303202) and sign up for an offer (I went for "LoveFilm" because you just have rent a DVD for free and terminate your account within your 14 days trial. It won't you cost a penny).
Then refer it to a couple of friends (like what I am doing right now) and wait for your iPhone 4 to arrive at yourdoorsteps.
Isn't it simple? You don't believe me? Give it a try and you will have to thank me.