Rear plastic shell of upcoming budget iPhone leaked?

The big iPhone rumor this year is that Apple will release a lower-cost model with a polycarbonate plastic backing, similar to the one found on the iPhone 3G and 3GS. Today, an image has cropped up that purports to show the rear shell of the budget model iPhone. As you can see, it's similar in size to the iPhone 4, and is mostly flat, rather than the rounded 3G/3GS design. Tactus, the company that is making the claims, also has other details:

I’ve also heard on the grapevine that the alleged budget iPhone will have an A5 processor like the iPad Mini with a 32nm diecast. It’s also rumoured it will have a 3.5 inch retina screen, much like the 4S, but not as big as the iPhone 5 … I’ve also discovered the factory producing this secretive project have confirmed the device will be available in Black, White, Blue, Red and Yellow.

A multi-colored low-cost iPhone? What do you think?

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