Samsung Galaxy S4 Mini Duos (GT-I9192) has already received the latest Android 4.2.2 Jelly Bean update with firmware build number I9192XXUBNB1. The new official firmware is now available as an Over-The-Air (OTA) update as well as through Samsung KIES.
Firmware details
PDA: I9192XXUBNB1
CSC: I9192OJVBNB1
MODEM: I9192XXUBNB1
Version: Android 4.2.2
Build date: Feb 04, 2014
Regions: Saudi Arabia, Afghanistan, Algeria, Egypt, Iran, Iraq, Kenya, Libya, Morocco, Pakistan, South Africa, Tunisia, United Arab Emirates
Samsung Galaxy S4 Mini Duos I9192 users who missed the OTA update notification or unable to access the update over Samsung KIES, can now download and install the same manually using our step-by-step guide.
Pre-requisites
1. Install USB Drivers for Samsung Galaxy S4 Mini on the computer.
2. Enable USB Debugging Mode on the phone by navigating to Settings >> Developer Options.
3. Make a backup of all your important data before following the guide.
4. Ensure the battery of the phone is charged more than 80 percent.
5. The Android 4.2.2 XXUBNB1 Jelly Bean firmware is compatible only with the Galaxy S4 Mini Duos (GT-I9192). Applying this to any incorrect variant might brick the device. Verify the model number of the Galaxy S4 Mini by navigating to Settings >> About Phone.
Files Required
1. Android 4.2.2 XXUBNB1 Jelly Bean Firmware (Mirror Link) for Galaxy S4 Mini Duos I9192
2. Odin 3.07

Steps to Update Galaxy S4 Mini Duos I9192 with Android 4.2.2 XXUBNB1 Jelly Bean Firmware
Step 1: Extract Firmware zip file using WinRAR/7-Zip/WinZip or any other extracting tool, you will get a .tar.md5 file and some other files (optional).
Step 2: Extract Odin zip file and you will get Odin3 v3.07.exe along with few other files.
Step 3: Switch off the Galaxy S4 Mini.
Step 4: Boot the device into Download Mode by pressing and holding Volume Down, Home and Power buttons together until a construction Android robot icon with a warning triangle appears on screen. Now press the Volume Up button to enter Download Mode.
Step 5: Run Odin on the computer as an Administrator.
Step 6: Connect the Galaxy S4 Mini to the computer using USB cable while it is in the Download Mode. Wait until Odin detects the device. When the device is connected successfully, the ID: COM box will turn to light blue with the COM port number. Additionally, the successful connected will be indicated by a message saying Added.

Step 7: Select the following files in Odin from extracted I9192XXUBNB1 firmware folder:

• Click the PDA button and select the .tar.md5 file.
• Click the Phone button and select file with MODEM in its name. Ignore if there is no such file.
• Click the CSC button and select file with CSC in its name. Ignore if there is no such file.
• Click the PIT button and select the .pit file. Ignore if there is no such file.

Step 8: In Odin, enable Auto Reboot and F. Reset Time checkboxes. Also, ensure the Re-Partition checkbox is chosen only if a .pit file was chosen in the previous step.
Step 9: Verify everything suggested in Step 7 and Step 8 is done correctly. Then hit the Start button to begin the installation process.
Step 10: Once the installation process is completed, your phone will restart and soon you will see a PASS message with green background in the left-most box at the very top of the Odin. You can now unplug the USB cable to disconnect it from the computer.
Samsung Galaxy S4 Mini Duos I9192 should be now updated with official Android 4.2.2 XXUBNB1 Jelly Bean. Head over to Settings >> About Phone to verify the software version running on the device.
Note: If Galaxy S4 Mini Duos I9192 stuck at booting animation after Step 10 then go to recovery mode (press and hold the Volume Up, Home and Power buttons together) and perform Wipe data/Factory Reset and Wipe Cache Partition task before selecting reboot system now function. In recovery mode use Volume keys to navigate between options and Power key to select the option. Please note, performing wiping task will erase your device internal memory data and not external SD card data.

Read also: How to Root Galaxy S4 Mini Duos I9192 on Android 4.2.2 Jelly Bean and Install CWM Recovery

Samsung Galaxy S4 Mini Duos I9192 users who wish to root and install ClockworkMod Recovery (CWM) on their devices, may follow our step-by-step guide below.
This tutorial uses CWM and Root Kit files released by Recognized XDA-Developers, arco68. It allows Galaxy S4 Mini Duos users to root their devices without any difficulty.
Disclaimer: Rooting voids the warranty of your device. We and the developer of this rooting procedures shall not be held responsible if any undesirable outcomes may happen to your device. use of this root guide is solely at your own risk!
Pre-requisites
1. Install USB Drivers for Samsung Galaxy S4 Mini on the computer.
2. Enable USB Debugging Mode on the phone by navigating to Settings >> Developer Options.
3. Make a backup of all your important data before following the guide.
4. Ensure the battery of the phone is charged more than 80 percent.
5. The CWM and Root Kit files works only on the Galaxy S4 Mini with dual SIM card support (GT-I9192). Applying these to any incorrect variant might brick the device. Verify the model number of the Galaxy S4 Mini by navigating to Settings >> About Phone.
Files Required
1. CWM (recovery-clockwork-6.0.4.6-serranodsub.tar.zip)
2. Root Kit (S4Mini_RootKit_v2.zip)
3. Odin 3.09 Mirror Link
Steps to Root Galaxy S4 Mini Duos I9192 Running on Android 4.2.2 Jelly Bean Firmware
Step 1: Extract the CWM .zip and Odin 3.09 .zip files using WinRAR/7-Zip/WinZip or any other extracting tool.
Step 2: Copy the Root Kit .zip file to the SD card of your phone.
Step 3: Switch off the Galaxy S4 Mini. Then boot into Download Mode by pressing and holding Volume Down, Home and Power buttons together until a construction Android robot icon with a warning triangle appears on screen. Now press the Volume Up button to enter Download Mode.
Step 4: Launch Odin on the computer as an Administrator.
Step 5: Connect the Galaxy S4 Mini to the computer using USB cable while it is in the Download Mode. Wait until Odin detects the device. When the device is connected successfully, the ID: COM box will turn to light blue with the COM port number. Additionally, the successful connected will be indicated by a message saying Added.
Step 6: In Odin, click the AP button and select the CWM .tar.md5 file. Make sure that the F. Reset Time checkbox is NOT selected.
Step 7: Double-check and click Start button in Odin. The installation process will now begin.
Step 8: Once the installation process completes, your phone will reboot automatically. When the phone vibrates, IMMEDIATELY press and hold Volume Up, Home and Power buttons at the same time to boot into CWM Recovery.
Step 9: In CWM Recovery, select "install zip from sdcard" option then select "choose zip from sdcard". Now, navigate to the Root Kit .zip file that you copied earlier and confirm the installation by selecting Yes.

Step 10: Once the installation process completes, return to main recovery menu and select "reboot system now".

Samsung Galaxy S4 Mini Duos I9192 running on Android 4.2.2 Jelly Bean is now rooted successfully. You can now install any app that requires root permission. Verify the root status of the device by downloading Root Checker app from Google Play Store.
Note: Many Samsung devices store a flash counter that keeps track of how many times you have flashed custom firmwares to your device. Triangle Away can be used to reset the flash counter to zero.
How to Fix "Unfortunately, SuperSU has stopped"?
Step 1: Download and install the latest APK of SuperSU on your device.
Step 2: Open SuperSU app (update the binary if prompted) and allow it to disable KNOX.
Step 3: Reboot your device.
Thank's to all fellas at XDA who first tried out this rooting technique. This method was originally posted via XDA-Developers original thread.