• This is the official Android 4.0.4 Ice Cream Sandwich, 4.1.2 Jellybean and 4.3 Jellybean stock firmware/ROM(Flash file) for the Samsung Galaxy S3 GT-I9300. The flash file for the Samsung Galaxy S3 GT-I9300 is necessary when you want to perform any of the following software-related tasks: Upgrade/Update your Samsung Galaxy phone’s firmware.
  • SAMSUNG GALAXY S3 GT-I9300 OFFICIAL JELLY BEAN 4.3 FIRMWARE. Before you begin with guide instructions below, make sure your android device is adequately charged — at least 50% battery of the device. STEP 0: CHECK DEVICE MODEL NO.
  • This Firmware PDA is I9300XXUGNB6 with OS Jelly Bean(Android 4.3) and the Firmware are build on Fri 11 Jul 2014 15:52:16 pm. Download Firmware Samsung Galaxy S III (GT-I9300).

Download Android 4.3 Firmware For Galaxy S3 Gt-i93000

Here are the steps to flash XXUGNG3 Android 4.3 on Galaxy S3 I9300 official firmware: Unzip Odin on your computer and install it. Unzip firmware zip file in the same folder as Odin.

Are you a user of Samsung Galaxy S3 GT-I9300? Today, Androidbiits is going to share a great news with the users of Galaxy S3 GT-I9300. Yes, Android 4.3 Jelly Bean UBUGNG1 [I9300UBUGNG1] has been released for Samsung Galaxy S III GT-I9300. Are you wondering how to install I9300UBUGNG1. Dear friend, I am here to help you in updating your Galaxy S III GT-I9300 to Android 4.3 UBUGNG1. Recently, I have posted the steps for updating Samsung Galaxy S4 mini GT-I9190 to Android 4.4.2 I9190UBUCNG1. Now I am going to write the step-by-step instructions to update Samsung Galaxy S III GT-I9300 to Android 4.3 UBUGNG1. This is a pretty good news for S III GT-I9300 users who are bored with the old firmware and waiting to install new firmware update.

Firmware For Samsung Galaxy S3

I am expecting that you will be able to install Android 4.3 UBUGNG1 [I9300UBUGNG1] on Galaxy S III GT-I9300 easily without facing any difficulty after reading the steps posted in Androidbiits.com. I9300UBUGNG1 will bring some improvements on S III GT-I9300. Oh yes, I forgot to say that soon you will be able to root Samsung Galaxy S III GT-I9300 to Android 4.3 UBUGNG1. Dear, you need to save your personal data in a secure place before updating your GT-I9300 as there is a chance of losing all your personal data from GT-I9300. Well, You must install Galaxy S III GT-I9300 USB driver on your PC before connecting GT-I9300 with it. GT-I9300 USB driver can be downloaded from the official website of Samsung.

Below are the steps using which you can install Android 4.3 UBUGNG1 [I9300UBUGNG1]. Androidbiits will not be responsible if GT-I9300 got damaged while being updated to I9300UBUGNG1. GT-I9300 battery level must be above 82% before following these steps.

How to Install Android 4.3 Jelly Bean UBUGNG1 [I9300UBUGNG1] on Samsung Galaxy S3 GT-I9300

1. First, you need to download Android 4.3 Jelly Bean UBUGNG1 [I9300UBUGNG1] on your PC.

2. Now you have to download Odin to install I9300UBUGNG1.

3. Now you have to put Samsung S3 GT-I9300 into download mode using these steps:

  • Turn off Galaxy S3 GT-I9300 carefully.
  • Press S3 GT-I9300 volume down button and home button simultaneously.
  • Press S3 GT-I9300 Power button at the same time while pressing its Home button and volume down button.
  • Press S3 GT-I9300 volume up button again after viewing a warning message to put it into download mode.

4. Launch Odin on your PC and connect Samsung S3 GT-I9300 with your PC via USB cable.

5. You can see a message in the bottom left corner of Odin after connecting Samsung S3 GT-I9300 with your PC.

6. Now you have to extract the ZIP file of Android 4.3 UBUGNG1 on your PC downloaded in STEP 1.

7. Once you have successfully extracted the ZIP file of Android 4.3 UBUGNG1, you have to press “AP” in Odin and choose “.tar.md5″ file.

8. Now you have to press the “Start” button in Odin after selecting “Auto-reboot” option.

Now you need to wait until GT-I9300 is restarted. Once it is restarted, you can enjoy I9300UBUGNG1. In this way you can install Android 4.3 UBUGNG1. If you are facing any difficulty while installing I9300UBUGNG1, then you can share your difficulty with me in the comment section below.

Following the Samsung Galaxy S4 and the Galaxy Note 2, Android 4.3 firmware for the Samsung Galaxy S3 has also made its way online and is available for download, unofficially of course, courtesy of a SamMobile source.

This is the first Android 4.3 leak for the Galaxy S3, build version I9300XXUGMJ9, and while stable, is still a test build and will probably have a few bugs. According to SamMobile, some of the changes include a complete overhaul of the UI, making it similar to what can be seen on the Samsung Galaxy S4 and Galaxy Note 3, with the Settings app also featuring a new tabbed interface. Unfortunately, the original launcher and widgets are still being used, and Samsung Knox, which is an expected feature with the final release, is yet to be implemented in this version. Of course, since this is a test build, features and more UI changes may be available in future leaks and the final, official release.

You can download the file here, and find installation instructions from SamMobile here. SamMobile has tested this version and says that it is stable, but keep in mind that flashing custom ROMs and unofficial leaked firmware is not without its risks, and some amount of technical know-how is recommended. If you decide to go ahead, please follow the instructions exactly as stated. Also remember to back up your data before flashing, as installing this test build will wipe your device, including data on your internal SD card.

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