[ame="
http://www.youtube.com/watch?v=srczFqh8-NQ"]NGUI with Unity - Resolution Independent GUI - YouTube[/ame]
This is a relatively short tutorial demonstrating how to use NGUI to create a single draw call UI, and shows how NGUI allows the UI to scale perfectly between different mobile device resolutions and aspect ratios. This will allow you to create one universal UI for iOS and Android development.