iPhone update: facts and fiction

If you haven't already bitten the bullet and taken your unlocked iPhone down that scariest of paths, the 1.1.1 update, we're here to sort out a bit of the hearsay from the actual and fairly inconvenient truth. Even if you have already updated, or never even unlocked or jailbroke your iPhone to begin with, there's still a lot to learn, so let's dive in, shall we?

http://www.engadgetmobile.com/2007/09/28/iphone-update-facts-and-fiction/

This is a very good article go check it out!