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Install Android 4.2.1 update for Galaxy S3 [leaked I9300XXUFMB3 firmware]


Samsung Galaxy S3 has just received the Android 4.2.1 Jelly Bean update with a leaked I9300XXUFMB3 firmware, Galaxy S3 Android 4.2.1 firmware comes with so many handy features that you can try to make your life more effortless such as voice command, Android 4.2.1 for Galaxy S3 brings voice command feature that lets you to control various aspect of your Galaxy S3 using your voice.

However the Android 4.2.1 firmware for Galaxy S3 also improves ripple effect on lockscreen, new Android 4.2.1 Lockscreen with widgets, Daydream app (active it from settings>display), new additions in Notification Center and Notifications are more actionable.

This guide shows you how to install Android 4.2.1 I9300XXUFMB3 firmware for Galaxy S3 manually but keep in mind that since this is a leaked firmware, it might not be stable and contain bugs. If you’re interested, worry not as the firmware has been tested and works perfectly. However it increase the flash counter, for unfamiliar flash counter gives you installation record to Samsung that may void warranty.

Use a Windows PC with USB drivers installed, backup everything because the below procedure may wipe data, you can sync your contacts with Gmail account and for messages use SMS apps, lastly use the carbon Android app to backup apps and data.

DISCLAIMER: Please proceed the below guide at your own risk, Android Egis will not be held responsible if your device lost data or gets damaged following this guide.

Instructions

Step #1: Download the I9300XXUFMB3 Android 4.2.1 Jelly Bean firmware for Galaxy S3 from here (File Name: I9300XXUFMB3_I9300OJKFMB3_ILO.zip) and Odin from here.

Step #2: Unzip both zip files into a folder.

Step #3: Open the folder where you’ve unzipped above file and run Odin3 3.04.exe.

Step #4: Turn the device off.

Step #5: Reboot the device into download mode by holding down volume down, home and power buttons.

Step #6: Once you’re in download mode plug the device to PC using USB cable. Odin will detect the device, ID:COM will turn yellow and a message saying ADDED will appear. (Note: If Odin doesn’t detect the device, make sure that USB drivers are properly installed on your computer).

Step #7: Click on PDA Button and locate I9300XXUFMB3_I9300OJKFMB3_HOME.tar.md5 from the folder where you’ve unzipped above files in the step 2. (Note: Don’t make any change, just make sure that re-partition is unchecked).

Step #8: Click on Start button to start installation, once the installation done, your device will reboot itself and you’ll see message saying PASS (Note: If Odin refuse to install the update and show message FAIL, or get stuck, close the Odin and unplug device, then pull out battery from the device for a few seconds. Then put the battery back to the device and reboot into download mode. Then install the firmware again.

Step #9: If your device reboot into normal mode, you’re done, enjoy! But if you device gets stuck at boot screen, you need to perform wipe, to do so, turn off device, then reboot into recovery mode by holding down volume up, home and power buttons, in recovery mode, select the wipe data/factory reset, and confirm on the next screen. Once it done, select “Go Back” after that select “Reboot System Now.”

That’s it, the Android 4.2.1 Jelly Bean firmware is now installed on your Samsung Galaxy S3 GT-I9300, if you experience any error, leave a comment below.

Via: SamMobile

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