Samsung has rolled out its newest bug-fix and maintenance update for its international variant of Galaxy S3, with stock build number I9300XXUGML3. The new update is expected to fix all the inherent bugs and issues unearthed in previous Android 4.3 Jelly Bean updates.

Root Galaxy S3 Running I9300XXUGML3 Android 4.3 Official Firmware [GUIDE]

Android 4.3 I9300XXUGML3 Firmware Details

Version: Android 4.3
Build date: Dec 26, 2013

Those who have already updated their Galaxy S3 I9300 to Android 4.3 XXUGML3 official firmware can now root the same using CF-Auto-Root via Odin flash tool by following this guide.

IBTimes UK reminds its readers that it will not be held liable for any damage to device during or after firmware installation. Users are advised to proceed at their own risk.


  1. Install necessary USB Drivers for Galaxy S3 on the computer.
  2. USB Debugging Mode should be enabled on the phone by navigating to Settings >> Developer Options.
  3. Back up your important data to avoid potential data loss during firmware installation.
  4. Ensure the phone is factory unlocked (not locked to any specific carrier).
  5. Verify Galaxy S3 has at least 80 percent battery charge.
  6. The CF-Auto-Root tool and instructions provided in this guide are meant for the global variant of Galaxy S3 (GT-I9300) only. Do not attempt installing it on incorrect variants as it may brick the device. Verify the model number of the Galaxy S3 by navigating to Settings >> About Phone.

Downloads Required

Steps to Root Galaxy S3 I9300 Running on Android 4.3 XXUGML3 Jelly Bean Firmware

Step 1: Extract CF-Auto-Root and Odin 3.07 files using WinRAR/7-Zip or WinZip.
Step 2: Power off the Galaxy S3. Now boot the device into Download Mode by pressing and holding Volume Down, Home and Power buttons together until a construction Android robot icon with a warning triangle appears on screen. Then tap Volume Up button to progress into Download Mode.
Step 3: Open Odin on computer as an Administrator.
Step 4: Connect Galaxy S3 to computer via USB cable in Download Mode. Wait for the device to get recognised in Odin. When the device connects successfully, the ID: COM box will turn light blue with the COM port number along with a message saying Added.

Note: If the Added message fails to appear, then try re-installing USB drivers or changing the port on the computer.

Step 5: In Odin, tap PDA button and choose CF-Auto-Root-m0-m0xx-gti9300.tar.md5 file.
Step 6: Ensure Auto Reboot and F. Reset Time options are selected in Odin. But, the Re-Partition option must be unchecked.
Step 7: Verify Step 5 and Step 6, and then hit Start button in Odin to begin the root installation process.
Step 8: After installing the root, your Galaxy S3 will reboot and soon you will see a PASS message with green background in the top left-most box in Odin. It is now safe to disconnect the USB cable and remove the device from computer.

Samsung Galaxy S3 is now rooted on Android 4.3 I9300XXUGML3 Jelly Bean official firmware. It is now possible to install any app requiring root permission. Verify the root status of your phone by downloading and installing Root Checker app from Google Play Store.

[Source: XDA]