Install I9300XXUGNJ2 4.3 Galaxy S3 GT-I9300, Not a 4.4.2 KitKat Update

The Android 4.4.2 KitKat is still out of reach on Samsung Galaxy S3 GT-I9300. But the Android 4.3 keeps on flowing and today’s firmware dubbed with build number I9300XXUGNJ2 and gradually rolling out in select countries in Europe. The 4.3 I9300XXUGNJ2 is now available in Netherlands and the southeastern part of Europe. This update firmware indicates same baseband version but the kernel version is quietly being updated. This might only add some few improvements on the system OS for greater performance but no other significant changes can be found to the overall 4.3 layout.

Here are the build details of I9300XXUGNJ2
Android version: 4.3
Baseband: I9300XXUGNA8
Kernel version: 3.0.31-2429075
Build number: KOT49H.I9300XXUGNJ2

The UGNJ2 4.3 update has seen now only available in Southeast Europe and The Netherlands, other countries may or may not seen this update on this coming days. You can simply get this update through Samsung Kies if already available in your regions. Below is the original firmware bundle I9300XXUGNJ2 for advanced users that may now want to update manually.

Install I9300XXUGNJ2 4.3 Update on Galaxy S3 GT-I9300

Disclaimer: This guide is for advanced users only, this is risky for beginners. We shall not be held responsible if anything happens to your device while using this guide. Proceed at your own risk!

FAQ about flashing I9300XXUGNJ2 4.3 Firmware/stock ROM

Q: Does it safe to flash a stock ROM?
A: There is a risk danger in flashing firmware either original stock ROM and or custom ROMs on the device. Any unwanted interruption occurred will cause your device into soft bricks. If it is your first time heard about this method,  it is highly recommended to search more and learn about flashing stock ROM before you proceed.

Q: Does Flashing will remove all my data stored on the device.
A: Yes and NO. There are two types of stock ROM, the wiped and non-wiped version. It is highly recommended that you should back-up all your important data stored in the phone’s memory like contacts, messages before flashing.

Q: Do I Need to ROOT or UNROOT my phone before flashing stock ROM?
A: NO need to root or unroot your device, but you will lose root once flashing is made. So, you need to re-root your device again.

Q: Does Flashing stock ROM to my phone will erase the network lock?
A: NO. Your network (or SIM) lock will still remain active.

Q: Does Flashing stock ROM will remove root on my phone?
A: Yes. If you currently have rooted, your phone will return back to original factory settings after flashing. You need to re-root again to install any 3rd party applications.

Q: Does flashing an operator specific firmware will restrict my open phone to that operator’s network?
A: NO. Your phone still remain open for any Operator SIM. Operator specific builds usually containing “only specific country or carrier provider” logo, bloatwares, wallpapers and/or browser settings, etc.

Disclaimer: We shall not be held responsible if anything happens to your device by following this guide. You may proceed at your own risk, your phone is not a toy for us, it is your own personal property, it is up to you to decide on what and how to do about it.

Important Reminders before Flashing Galaxy S3 Firmware/Stock FROM

– Make sure that your Galaxy S3′s battery is fully charge.
– Stock ROM packages comes in two formats the ‘Full-Wipe’ (delete your stored data after flashing) and the ‘Non-Wipe’ (it doesn’t delete your phone’s stored data) but it is highly recommended to make a back up all important files stored from your phone’s internal memory – contacts, messages, etc.  before flashing no-matter if it is Full-WIpe or Non-Wipe, just to be safe and ensure that your stored data are in  safe  if something went wrong during the flashing process.
– Remember or back up the APN settings of your device. ( This only done if you try to install the other region stock ROM.
– Use a PC or laptop that runs in Windows OS, with a good and perfectly working USB serial port.  Odin will not work on MAC OS.
– Use the supplied USB cable for your Galaxy S3.
– Enable USB debugging from your phone’s settings. Go to Settings > Applications > Development, and tick the box that says ‘Enable USB Debugging’.
– Do a “Hard Reset” if you have a lot of 3rd party applications installed from your phone, this is useful to gain a smooth flashing. (Just make sure that you already back up all your important files before resetting your device.
– Ensure that KIES is closed and not running in the system tray! Kies will interrupt and doesn’t like Odin, it will block you from flashing.

Step 1: Download the correct stock firmware and tools for flashing

Odin3_v3.07 Download
GT-I9300 USB Driver Download

List of Countries/Carrier receives the I9300XXUGND5 4.3 update

Download Stock Firmware Android 4.3 I9300XXUGND5:

Netherlands – I9300XXUGNJ2 I9300PHNGNJ1 download (link) (link)
South East Europe – I9300XXUGNJ2 I9300SEEGNJ1 download (link) (link)

Step 2: Extract the downloaded stock ROM

You need to extract the downloaded file which is packed in zip or rar files, so that you’ll get the tar.md5 file.

Step 3: Run and Configure Odin

Run Odin downloader Odin3_v3.04 on your PC desktop. Watch out the check-boxes options on the right top of Odin, ensure that the ‘RE-PARTITION’ is unchecked, only  the ‘AUTO-REBOOT and ‘F.RESET TIME’ checkboxes are both remained checked.

ODIN flasher v3.04 configure checkboxes on flashing Samsung Galaxy S III GT-I9300

Step 4: Reboot your Galaxy S3 into Download Mode

To reboot the Galaxy S3 into  download mode , you need to turn the power off.  After it completely shut off,  just  press and hold the Volume Down key,  Home button and the PowerON/OFF button simultaneously.
Samsung Galaxy S3 Download Mode buttons Volume Down,HOME,Power keys
You should then prompted into a warning screen and asking you  to press volume up if you want to continue or volume down to cancel, just simply press volume up to get into download mode. The download mode then displays an Android robot and say’s “Downloading.. Do not turn off target!!”

Step 5: Connect your Phone to PC or Laptop

Once you already reboot the phone in download mode,  simply connect the phone to your PC or laptop USB.
In Odin window – the ID:COM box will turn to blue color and indicates the COM port number and a word “Added” on a log box will prompt you that the device is already detected or recognized by Odin.

Odin flasher v3.04 connecting Samsung Galaxy S3 via PC/laptop USB

Your COM port number might be different from mine. If you do not see a COM port number then there’s something missing or wrong. You may read again from the top of this post.

Step 6: Load the binary .tar.md5 file

If the stock ROM is pack in One .tar.md5 file only the PDA, CSC and Phone modem are already included to it. Now, you need to just simply click on the PDA or AP button, then browse to the folder where the .tar or .tar.md5 you have previously extracted and then select and load it.
AP button: “ I9300XXUGNJ2_I9300PHNGNJ1_I9300XXUGNA8_HOME.tar.md5″.

Just like this image below. Build numbers varies on each product code, specific geographical region and network CSC (Consumer Software Customization) codes.

Odin flashing Samsung Galaxy S3, loading the single pack .tar.md5 file stock ROM

Note: Again, DO NOT load or put a ‘PIT’ file.

Step 7: Start Flashing or Installing the stock ROM

Once if all set and ready to fire-up, hit the “START” button in Odin to begin flashing the stock ROM.
Do not ever interrupt the phone while already in flashing progress, like disconnecting the cable or turning off the device. Just wait until it completely finish.

Odin flasher - start installing Galaxy S3 stock ROM

Step 8: Watch out for the word PASS!!

When the Stock ROM installation successfully completes, you will then see a word “PASS” in Odin. This indicates that the flashing was already finish, and on the log box it says “All threads completed. (succeed 1 / failed 0)”. The phone will just then automatically reboot, then it’s to remove it from PC or laptop USB connection.

A word Pass in Odin when the installing stock ROM on Galaxy S3 succefully completes

Confirm your fresh firmware installed by typing *#1234# or
Go to Settings>About Phone>Firmware info.
You can also do factory reset by dialing *2767*3855#.
Check and reconfigure your APN settings when data networks connection issues encountered. This only happens if you installed other regions stock ROM.

Possible errors that you may encountered, this is based on my own experience while flashing stock ROM on Samsung Android devices. These are just a few hints on how to resolved it.

Q: I got an error message that says “Set-up connection Failed” ?
A: 1. Check your USB connection from the phone to PC,
2. Connect to another PC USB port
3. Check and try to another USB cable
4. Re-install the USB driver.

Q: Odin just suddenly stuck in the middle of nowhere while in flashing progress, It isn’t responding at all?
A: Check for possible program that might interrupt the process, like disabling the anti-virus and closing any running programs.
Try to use another PC or laptop,

Q: I experienced bootloop or the phone just stuck on Welcome Logo (phone always stop at bootanimation) and it won’t boot normally?
A: You can fix it via recovery mode option, do this:
Boot in recovery mode
1. Press and hold Volume Up, Home and Power button.
2. Use volume keys to select, Up and Down and Power or Home key to select the option
3. Select Wipe Data/Factory Reset using the Home button.
4. Next select the Wipe Cache Partition
5. Lastly, select Reboot System Now to reboot your Galaxy S3 in Normal mode.

Q: My Galaxy S III is now soft-bricked, what should I do then.
A: For 3 years, never been happened to me soft-bricking my older phones using Odin, I was once got soft-bricks using ROM manager. But if somehow this happens to your device, here’s how.

If you can still access the phone in Download Mode, then you can recover it by repeating the flashing procedure again.
If not, that’s seriously bad. The only option is to send it to your nearest service center. Folks at service will recover it by forcing to re-flash the firmware via JTAG.

That’s it! you have now learned how to install Samsung Galaxy S3 stock ROM. You can use this procedure again and again, using any future stock ROM that only match with your device. But remember DO NOT use this method to downgrade your Galaxy S3 to any old firmware since the latest 4.3 updates has a new security policy guidelines which prevents you to downgrade. All other questions and suggestions are most welcome, just let me know by leaving a message on the comment form below. Enjoy!.