XXDLH9 Android 4.1 Jelly Bean official firmware has been leaked for the Galaxy S III I9300 and is available to download and install before its official release.
Details of the XXDLH9 firmware are below:
Base Firmware: I9300XXDLH9 (4.1.1)
Region Europe
Country: United Kingdom
Carrier: Unbranded
Build Date: 31st August 2012
Modem: XXDLH9
CSC: OXADLH9
Change List: 104023
You can download the ROM from here.
Now on to the tutorial itself, just following the steps below to install XXDLH9 Firmware on your Galaxy S III I9300. Make sure to backup all your data beforehand as this tutorial will wipe all your data along with your root. You can follow this guide to Root Galaxy S III I9300 Running XXDLH9.
Step 1. Download the ROM linked above.
Step 2. Download Odin 1.85 from here.
Step 3. Go into Download mode by pressing Volume Down + Home buttons at the same time, and then press the Power button when the Android appears. Press the power again to go into Download mode.
Step 4. Open Odin which you download from the link above and connect your phone via USB cable.
Step 5. Press on the:
– PDA button in Odin and select the CODE file.
– Phone button and select the MODEM file.
– CSC button and select the CSC file.
– PIT button and select the PIT file.
You’ll find these files in the ROM linked at the start of this tutorial. If there are no files of the type in the folder then ignore them.
Step 6. Check the Auto Reboot F.Reset Time check boxes. Also make sure to check the Re-Partition option but only if you’ve selected a PIT file in Step 5.
Step 7. Click the Start button. The procedure should take a couple of minutes at most.
Step 8. After the installation is done your phone should restart and boot into the home screen. Disconnect the phone from your computer and turn it off again.
Step 9. Now press Volume Up + Home + Power to navigate into the recovery menu.
Step 10. Using the volume buttons to navigate select the wipe data/factory reset option.
Step 11. Now finally select reboot phone.
And you’re done! If you want to install the deodexed custom ROM then follow this guide. Feel free to ask us any questions you may have in the comments below.