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Update Samsung Galaxy S3 I9300 to Android 4.3 Jelly Bean XXUGND1 Firmware

The Galaxy S3 I9300 model has received a new Jelly Bean firmware update and you can use this post if you want to successfully update your device with it.

It seems like the Galaxy S3 still has a long way to go before it will receive its first Android 4.4 KitKat upgrade. Until then you can still flash newer builds of Android 4.3 Jelly Bean. The new firmware brings several changes such bug fixes, stability improvements and new elements that should improve your overall smartphone experience.

Read this entire post and make sure that you won’t skip any so that you will manage to complete installation at your first attempt.

Here’s what you need to do before getting to the tutorial:

  • use this post only for the Samsung Galaxy S3 model number I9300.
    – don’t try to update any other Android phones with the files that you will find in this guide, not even the I9305 Galaxy S3.
  • first you need to make sure that the Samsung USB Drivers are installed on your computer.
    – without these drivers your computer and ODIN (the app used to flash the new ROM) will not recognize your Galaxy S3.
  • enable USB Debugging from Developer Options before getting to the tutorial guide.
    – in case the Developer Options menu isn’t shown in Settings, then you should enable it, too — guide here for Samsung Galaxy S5, it works for all Samsung phones and tablets.
  • disable the Samsung KIES and any antivirus apps from running on your PC.
    – these programs will usually prevent you from using ODIN to install any new Android updates.
  • if your device runs on custom ROM, then you should know that by installing a brand new official Android update you will get the system partition wiped.
    – so, if you want to backup some data from installed apps, SMS text messages or other similar files, then you can use the Helium tool for Android.
    sync Contacts info with your default Gmail account.
  • if the Galaxy S3 that you’re about to update already has a stock Android ROM on it, then the update will not do any harm, your data is safe.
  • rooted devices will have their root access revoked after the update.
  • any custom recovery will be removed and replaced with a stock Recovery instead.
  • check your phone’s battery charge level and make sure that it is over 60%, so that your phone will not be switched off in the middle of the updating process.
  • this is a guide that has to be used by advanced Android users.
  • do not blame us in case the phone gets bricked or in case you lose any important data files.
  • read the entire post, don’t skip any steps and you should be able to complete the process in under ten minutes without problems.

Now that you know all of the above you can continue to the next part of this post. Learn how to successfully update your phone to a new Jelly Bean firmware.

How to update Galaxy S3 I9300 to XXUGND1 Android 4.3 Jelly Bean:

  1. Download the I9300XXUGND1 firmware file from here.
    – the file is hosted at our friends at SamMobile, so you will need to create a new account with them before being able to download the file.
  2. Extract the contents of the firmware zip and save the I9300XXUGND1 tar.md5 file obtained on your PC.
  3. Download ODIN 3.09 from here.
    – extract the ODIN zip contents and save all file to a single folder on your PC.
  4. Power off the Galaxy S3 now.
  5. Next, boot the smartphone in Android Download Mode.
  6. When the phone has entered Download Mode you can launch ODIN 3.09 executable on your computer.
  7. Use the USB Cable and connect your phone to your PC.
    – wait for ODIN to detect the device, the continue to the next step.
    – if your phone isn’t recognized by ODIN, then you will be forced to re-install the Samsung USB Drivers on your PC (download link is in the preparation guide).
  8. Go to ODIN and click on the ‘AP’ button.
  9. Load the I9300XXUGND1 tar.md5 file in ODIN.
    – make sure that Re-Partition option is not enabled.
    – don’t change any other Odin settings.
  10. Press the START button when you’re ready for the updating process.
  11. After all files are installed you will see that your phone has rebooted and ODIN shows the ‘PASS’ alert.
  12. Wait for your device to boot in normal mode and then you can start the new Jelly Bean firmware.

These were all the steps that you had to take in order to successfully complete the updating process for your Galaxy S3.

In case you encountered problems with the update, read the notes below. If everything went according to plan, then you can close this article and enjoy your new Android 4.3 Jelly Bean firmware.

Note 1: if your phone freezes or it doesn’t do anything, ODIN freezes too or it display errors such as ‘FAIL’, then you will be forced to try and repeat the entire tutorial once again. Make sure that you don’t skip any steps and that you’ve downloaded the correct file for your phone.

Note 2: in case ODIN says that the update was completed but the Galaxy S3 enters into a boot loop or it boots in normal mode but it shows too many errors, then you will most probably be forced to apply a factory reset. This process wipes the system partition clean of all data, but it should make it boot correctly. Here’s how to do it:

  • power off the phone completely.
  • boot it into Recovery Mode.
  • select ‘wipe data/ factory reset’ from the options list.
  • confirm process.
  • reboot phone in normal mode.

These were all the steps that you had to take. For more help you should use the comments field below.

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