Here is the last mockup to surface of the upcoming and much hyped Iphone 5, the source is the Iphone case maker Hard Candy.  Here are some of the characteristics:

• Large 4.44-inch screen.
• It is significantly bigger than the iPhone 4, but the case tapers, making it feel a lot thinner.
• Large, lozenge-shaped Home button (This is rumored to be integrated with new Assistant function, allowing tasks to be controlled by voice).