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Samsung recently pushed the XXUEML8 build for the LTE version of the Galaxy S3. For those unable to get the new firmware build via Samsung Kies, the following guide will prove helpful in manually installing the I9305XXUEML8 firmware on your Galaxy S3.
As always, androidstray assumes no liability for the firmware installation, so if your phone gets bricked, it’s on you.
Before Getting Started
Before you get started, ensure that your Galaxy S3 is the GT-I9305 model.
As always, you want to backup your device and charge it to at least 80 percent.
Finally, enable USB Debugging mode by navigating to Settings -> Developer Options.
Updating Samsung Galaxy S3 to Official Android 4.3 Jelly Bean (XXUEML8)
1) Download and extract the official Android 4.3 firmware, which can be found here.
2) Download and extract Odin, which is available here.
3) Boot your Galaxy S3 into Download mode by pressing the Volume Down, Home and Power buttons together until a warning prompt appears. Once you see the prompt, press Volume Up to enter download mode.
4) Right click on Odin and launch the application as an administrator.
5) Using Odin, install the following files from the .zip archive downloaded earlier:
A) Click PDA and select the .tar.md5 file.
B) Select Phone and navigate to the file with Modem in the file path.
C) Click CSC and select the file with CSC in the file path.
D) Click PIT and select the file with .pit in the file path.
6) Navigate to the Option submenu in Odin and check Auto Reboot and F.Reset Time. Uncheck Re-Partition.
7) Click Start and the installation will begin.
8) When the firmware has finished flashing to your Galaxy S3, your phone will automatically reboot.
9) Once your Galaxy S3 restarts, you will officially be running Android 4.3 Jelly Bean XXUEML8. Kudos.