Samsung Galaxy S4 has a 5″ 1080p Super AMOLED display (PenTile 441 ppi), a pseudo octa-core Samsung Exynos 5410 or quad-core Qualcomm Snapdragon 600 (depending on region), 2 gigs of RAM, up to 64 gigs of storage, and a 2600 mAh battery. Furthermore, the device features additional features such as floating touch and a 13 MP shooter featuring a revamped camera interface.
The non-LTE version of Galaxy S4 has received an official build of CM 12.1 custom ROM. This will update the phone to Android 5.1.1. Another good thing, all the Samsung bloat will be removed once you install this ROM. Follow the detailed guide given below.