If just a few days ago an official Samsung firmware update was leaked as a test based on A, now we have a new update available in direct download to update via Odin.
In this new official update for the Samsung Galaxy S4 model GT-I9505 we can find fixes to small bugs and improvements such as transparencies in the task bar and the new inclusion of the icons in white of A Among many other things.
If you want to install this new official firmware Samsung Android 4.4.2 Kit Kat you will only have to download the official firmware from this same link and the correct version of Odin from this other. It is advisable before proceeding with the flashing of the official firmware, perform a Backup of all the data and applications that we want to keep since in the process, all the data on the terminal could be lost.

Once the two compressed files are downloaded, we will have to unzip anywhere our PC to Windows and flash following the method in this tutorial. Always remember that the most important thing of all is to make sure that the option Re-Partition is not checked.
If after the flashing process, once Odin returns us the PASS, our terminal when restarting will stay in bootloop or return to the Recovery screen, we will solve this mishap from the Recovery itself by doing a Wipe factory Reset and Wipe cache. Then we should restart normally.
This Official Firmware is unique and exclusive to the model Samsung Galaxy GT-I4 S9505 so refrain from testing on other versions of the terminal.
If you would like to Root this android version You can go through this tutorial where I explain it to you step by step.
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More information - Leaked firmware with Android 4.4 KitKat for the Samsung Galaxy S4, Samsung Galaxy S4, How to Root Android 4.4 Kit Kat
Download - Android 4.4.2 official firmware, Odin 3.09