The Galaxy S4 is Samsung’s flagship device launched earlier this year. It has a 1.9 GHz quad-core processor, Adreno 320 GPU, 2 GB DDR3 RAM, 5″ Full HD Super AMOLED screen, 13 MP rear camera, 2 MP front camera, 2600 mAh removable battery and 16/32/64 GB internal storage which is expandable upto 64 GB. It came with Android 4.2.2 and Samsung’s TouchWiz UI.
Samsung had promised a Android 4.3 update for the device which has now started rolling out, beginning from Germany. This update brings about OpenGL 3.0 Support, Galaxy Gear support, Samsung KNOX implementation, pre-loaded Samsung Wallet, improved RAM management, improved display color reproduction (display looks much sharper than before), improved TouchWiz launcher, a new Samsung keyboard, new Samsung browser, new camera firmware, minor UI tweaks (contacts app, flashlight widget, dialog boxes etc) and much more. For those users who are yet to get the update via OTA or Samsung Kies can manually flash it via Odin by following the below steps.