Most recently, the
Samsung Galaxy S4 version was released with
Android without changes.

And now an update to version 4.3 is available for the
GT-I9505G .
The firmware is without any changes from Samsung. I want to remind that Android 4.3 is a minor update and does not contain any strong differences compared to Android 4.2.2.
')

Also worth noting that the firmware can not be put on a regular Galaxy S4 (
GT-I9505 / GT-I9500 ). Otherwise, you will get a "brick". However, you can put a
ported version for the
GT-I9505 . You can flash the device through the Odin3 flasher.
All necessary files for the
GT-I9505G are in the
archive .
Source:
SamMobile.com