The mockups of the upcoming iPhones that Apple will be announcing on 10th Sept have been revealed by Tinhte.vn. These mockup sets are created by case manufacturers to leaked specifications for testing with new case designs.
I see 5C iPhone models have almost exactly the same size iPhone 5, the corners are more rounded, lumpy skin is not smooth but slightly lighter. Notably, the buttons made from plastic, not metal. The biggest difference from the bottom of the machine, we saw two bigger screws, large and small speaker holes cut more. Notably, besides micro sensor of iPhone 5 phone does not appear on the iPhone 5C, only secondary camera. Microphone located next to the camera side has not moved in a circle up (iPhone 5S, too).
Check out more photos here