Viber for iOS7 is a simple and clean mockups that is totally perfect for your projects specially in design. The most awesome thing is the iOS7 version of this that you can find it rarely. This would bring you to the top of your works. Free PSD designed by Erdal Bejtula.
http://dribbble.com/shots/1190191-Freebie-PSD-Viber-iOS7/attachments/157229
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