Samsung Galaxy S3 has a 4.8″ 720p display. It also was the first device to have a quad-core Exynos 4412 processor, with each core clocked at a maximum 1.4 GHz. It packs NFC, wireless charging capability, and the latest wireless radios. It ships with Samsung’s Nature UX interface. At the time of its launch, it ran on Android 4.0.4 ICS.
Samsung Galaxy S3 wont be getting official Android Lollipop update. So if you want to get the latest Android update, you will need to install custom ROM. CM 12 is the most famous custom ROM. But the Paranoid Android ROMs are more feature rich and offer unique Halo and Pie features. If you want to install this ROM, follow the guide below.