Alleged engineering sketches show Apple's iPhone 5 with edge-to-edge screen

The images from iDealsChina are rumored to be used by engineers to create cases to sell for the iPhone 5. Of late, third-party cases for devices like the iPhone and iPad have offered hints at the design of unannounced products.

"A while back we [heard] rumors that [the] iPhone 5 would have a curved back," the site reads, "but these images show iPhone 5 with the same form factor as iPhone 4 but with an edge to edge screen."

The rest of the case shows the design of the alleged iPhone 5 largely unchanged from the iPhone 4. If accurate, that would dispel a recent rumor that Apple plans to ditch the glass back and opt for an aluminum backing.

The designs also support a separate rumor from the Far East that Apple will expand the screen size of its next-generation handset. While the iPhone 4 sports a 3.5-inch display with a resolution of 960 by 640 pixels, some designs have shown a potential 4-inch screen squeezed onto an iPhone with the same size.