Jeremy Horwitz:

What we’ve learned: the new iPhone will indeed be longer and thinner than the iPhone 4 and 4S. […] According to our source, Apple will make one major change to the rear casing, adding a metal panel to the central back of the new iPhone.

iLounge has also been told that there will be a redesigned dock connector that will be smaller than the current one but slightly larger than the current iPhone’s bottom speaker.

I love the idea of a smaller dock connector (although, I don’t know if they’re necessary anymore) but I don’t want a 4-inch iPhone. One of my favorite things about the iPhone is it’s compact size and elongating the device and putting a larger display on it doesn’t sound like an improvement. I don’t want Apple to move in the direction that Android handset manufacturers have.