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.
There is a good news for the Samsung Galaxy S3 users as OmniROM running on Android 5.1 is available for the Galaxy S3. This is a very early build of Android 5.1 and Galaxy S3 is one of the first devices to get the Android 5.1 custom ROM. If you want to try out this ROM, follow the guide below.