Galaxy S4 LTE Gets I9505XXUFNC9 Android 4.4.2 KitKat Official Firmware

Okay, the wait is over for a Kitkat update!
We can confirm from reliable source that:

Samsung has just released a new Android 4.4.2 KitKat stock build with base firmware I9505XXUFNC9 for the LTE version of Galaxy S4 (GT-I9505). The new firmware build is now available for the Galaxy S4 users in Russia. Also, users from firmware supported regions can install the update.

Firmware Details

Model: Galaxy S4 LTE (GT-I9505)

PDA: I9505XXUFNC9

CSC: I9505OXEFNC1

MODEM: I9505XXUFNC9

Version: Android 4.4.2 KitKat

Build date: 19 March

Regions: Russia

I9505XXUFNC9 build can be downloaded as OTA update and through Samsung Kies server. Those who are staying outside Russia and missed the OTA update or, unable to access the update via Samsung Kies, may follow our step-by-step guide to install the same manually using Odin flashing tool.

Note that I9505XXUFNC9 is an unbranded version of firmware and can be installed on any unlocked GT-I9505 unit, regardless of country or region.

Before installing the stock firmware, users are advised to verify their devices meet following requirements.

Pre-requisites

1) Install USB Drivers for Samsung Galaxy S4 to connect the Android device with the computer.

2) Enable USB Debugging Mode on phone to connect it with the computer and use Android SDK with it. [Navigate to Settings>> Aboutphone. Tap on Build Number several times until a message appears saying 'You are now a Developer.' Now go to Settings>> Developer Options to enable USB Debugging Mode.]

3) Create a backup. If the device is having any custom recoveries such as CWM/TWRP then backup data using the same.

4) If the Android phone powers off due to lack of battery while the installation process, it could damage the device. Therefore, the Galaxy S4 should have charge above 80% battery charge.

5) The device should be factory unlocked and not locked to a particular carrier.

6) The phone will lose custom ROM with the installation of official firmware. Also, the custom recovery will be replaced by the stock version.

7) I9505XXUFNC9 Android 4.4.2 KitKat official firmware works only with Samsung Galaxy S4 GT-I9505. As flashing this on any other variant might brick the device, verify the model number of Galaxy S4 by navigating to Settings>> About device>> Model number.