Update Galaxy S3 I9300 To Android 4.3 XXUGNA8 Jelly Bean Official Firmware[Guide]


Galaxy S4 and Galaxy Note 3 are receiving the updates of Android 4.4.2 and Samsung promised to release it for many other flagships of it. Who know whether Samsung Galaxy S3 will receive the same update of not, well as far as Android 4.3 is concerned, Samsung is still releasing the update for Different regions. XXUGNA8 Android 4.3 is available for Galaxy S3 I9300 and you can install it on your device by following our tutorial.You might have received the update via OTA or via Samsung Kies, but if you still haven’t received it yet, then you can follow our tutorial to install This Firmware on your device.Thanks to SamMobile, for providing us the firmware File that we will use in our tutorial below. As this is an official Firmware, you won’t be needing any Custom Recovery or rooted device to install this Firmware on your Device.


If you are familiar with Odin and it’s working, then this tutorial might not be difficult for you. Otherwise read the whole tutorial first before trying it on your device. In this Article, we will show you How To Update Galaxy S3 I9300 To Android 4.3 XXUGNA8 Jelly Bean.But before we begin, Make sure:

  1. That you have a Well Charged Battery.
  2. Back-Up all your important ContactsCall Logs & Messages.It is highly recommended in case of any mishap or data loss to back up all your important data.
  3. Back-Up your Mobiles EFS DataHow To Restore and Back-Up EFS Data On Samsung Galaxy Devices.


The methods involved in flashing custom roms and rooting your phone is highly custom and may result in bricking your device,and has nothing to do with Google or the device manufacturers which is Samsung in our case. In case of any mishap we may not be held responsible. Follow these instructions to the letter to avoid any mishap or bricking. Make sure that whatever you do, you are doing it at your own responsibility.

Important things:.

  • Enable USB debugging mode.
  • Make sure that battery level is at 85% or more.
  • This Tutorial is Only For Galaxy S3 I9300.

Root Warning:

Since Android 4.3 XXUGNA8 is an official Release from Samsung and it doesn’t require Root or Custom Recovery. But if your Device is rooted, Installing this Firmware will most likely to erase the Root of your device. You need to root your device again to gain root access and start installing Custom Tweaks on it

All done and good, let’s head towards the Next page to See, How you can install Android 4.3 XXUGNA8 Jelly Bean Official Firmware on on your device, Galaxy S3 I9300.

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