Samsung Galaxy S4 isn’t fully distributed over the world yet but its first official firmware has been leaked. Thanks to AdamLange of XDA Developers who has posted the first leaked version of Galaxy S4 firmware. After it outed, Samsung released the official firmware for the Samsung Galaxy S4 (GT-19500).
Currently, Samsung has only released the firmware for China, but we should be seeing the firmware released to other countries soon. The Samsung Galaxy S4 runs the latest Android software (Android 4.2.2 Jelly Bean), which comes with the TouchWiz Nature 2.0 user interface.
Here are details of the Firmware :
Android Version: 4.2.2 – Build JDQ39
PDA: I9500ZCUAMDG
CSC: I9500CHNAMDG
MODEM: I9500ZCUAMDF
Build Date: April 24
Changelist: 465806
Recently Samsung released Kernel Source Code of Galaxy S4 and HTC did the same thing by releasing source code of HTC One.