Love to use clean and fast ROM like CM or AOSP? You can try out ParanoidAndroid ROM 3 on your Samsung Galaxy S3. And enjoy pure Google experience like Nexus 4 but with lot of cool features like PIE and Hybrid Mode. What is PIE? Oh, it is the replacement for the stock on-screen navigation buttons. It is an extra for Galaxy S3 which has hardware buttons. No worry, you can turn off it if not needed. Phone UI, Phablet UI and Tablet UI, which one do you prefer? Yes, this is part of Hybrid Mode feature. Pick the layout that matches your usage. By the way, do try out the latest HALO – Multi-tasking notification ticker too.