Today, by an anonymous Chinese sources it became known that Apple refuses iPhone glass back in 4 in favor of aluminum shell that is used in the last generation iPod Touch.
Admittedly, this is similar to the truth, because there are too many complaints that iPhone 4 too prone to scratching, particularly rear panel.
The source also reported that Cupertino decided to completely redesign the antennas, placed inside the chassis, underneath the Apple logo, which is very similar to the truth; I recall that not so long ago, Apple has patented the technology. Another insider said that Apple were going to install the iPhone 5 A5 processor used in the iPad 2.
Don’t forget that these rumors are treated, at least, with caution, because the source had promised that the Apple iPad release for Christmas 2010.