Iphone 5 Icon

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I started an iPhone 5 icon for G5 and never got to a point where I wanted to see it through to the end. I decided to make this for practice (first time making a 256x256 icon) and I'm pretty happy with it. Still a WIP because I'm pretty sure there are some things wrong with it. Critique me please.

EDIT: Made some changes and posted the final version on my site - www.andreygrabarchuk.com