I would kindly suggest doing a simple search before
posting or, for that matter , reading a few threads visible on that topic.
The answer is no if the phone has not been jailbroken before. We are all patiently waiting as it likely won't be to long
" if the phone has not been jail broken before"
Sorry had a brain cramp there.
I was thinking of the 4 operating system which can be jailbroken on a previously jailbroken phone.
The iPhone 4 still has no jailbreak that is released for the general public