A source talks about an iPhone Foxconn 5 with bigger screen and metal back

IPhone photo of a 4 with a metal casing. It is not an iPhone 5

A source close to Foxconn says that the next generation iPhone will maintain a similar size and shape to the current model but with a couple of changes we've already heard.

The first refers to a screen plus size, namely 4 inches. In its resolution does not provide any information.

Another change is to use a rear-finished metal (aluminum "?," Liquid metal?) To replace the current gorilla glass.

Source: Redmond Pie