How to Install Galaxy S3 I9300XXUFMB3 Android 4.2.1 Jelly Bean LEAKED firmware

Today SAMMOBILE comes with the new Install Galaxy S3 I9300XXUFMB3 Android 4.2.1 Jelly Bean LEAKED firmware. So now you can update your 4.1.2 Galaxy s III with new leaked Android 4.2.1 firmware. The new firmware is in tested stage and has some new features like new Android 4.2.1 Lockscreen with widgets, new Additions in Notification Center, improved Ripple effect on Lockscreen and more. As we mention above that the new firmware is leaked one, so you can’t update your S3 from Kies or from OTA. To try this update on your Galaxy S3 you have to install this Firmware manually on your device.

To apply this update your Device, you need a rooted S3 and does not need ClockworkMod Recovery installed. All you need a rooted device to test this new I9300XXUFMB3 Android 4.2.1 Jelly Bean LEAKED firmware. Please note, this is not an official firmware release for the public by Samsung. It is a test firmware and completely unbranded firmware which means any Galaxy S3 I9300 user can install this on their phones.

I9300 XXUFMB3 Firmware Details

Base Firmware - I9300 XXUFMB3 (4.2.1)
Carrier - Unbranded

NOTE:- Use these instructions at your own risk. We shall not hold any responsibility or liability. Make sure that you have the latest Samsung USB Drivers installed on your PC and Enable USB Debugging option from the Android Development menu. (Read Here :- How To Enable USB Debugging Mode in Android Devices)

Galaxy S3 I9300XXUFMB3 Android 4.2.1 Jelly Bean

Galaxy S3 I9300XXUFMB3 Android 4.2.1 Jelly Bean

How To Install I9300 XXUFMB3 Galaxy S3 Jelly Bean 4.2.1 Leaked Firmware

Step 1. Backup is one of the best way to save all your files and data, so do take the backup of your device. Here is the huge list of free android backup application, which helps you take the full backup of your Galaxy S3 Smartphone.

Step 2. Now don’t forget to install the latest Samsung Driver or Kies on your desktop.

Step 3. Now it’s time to Download the firmware on your desktop. Download Android 4.2.1 I9300XXUFMB3 for Galaxy S3 to your computer and extract the zip file.

Step 4. To apply this firmware update you need a latest version of ODIN app, download Latest ODIN app from here.

Step 5. Turn of your Galaxy S3 and enter into download mode. Press and hold the Volume Down + Home buttons together, and then press the Power button till you see the construction Android robot and a triangle. Press Power again to confirm to enter into Download Mode.

Step 6. Connect your Galaxy S3 With pc and run the ODIN app on your desktop. If the device is connected successfully, one ID:COM boxes will turn yellow after some time.

Step 7. Now Select the files that you have to flash/install on your Galaxy S3. These files are to be found from the extracted files in Step 3.

ODIN

ODIN

Click on ‘PDA’ and select file with ‘CODE’ in its name.
Click on ‘Phone’ and select file with ‘MODEM’ in its name. Ignore this step if there is no such file.
Click on ‘CSC’ and select file with CSC’ in its name. Ignore this step if there is no such file.
Click on ‘PIT’ and select the .pit file. Ignore this step if there is no such file.

Step 8. After this, check the Auto Reboot and F. Reset Time options. Don’t check the Re-Partition option, check it ONLY if you selected a .PIT file in the above step.

Step 9. Now hit the Start button from the ODIN app to start the installation process on your device. The process will take some time to complete the installation.

Step 10. After the installation is complete, now you phone will reboot. After you see the home screen on your mobile phone, unplug your phone from the computer.

Now you Galaxy S3 I9300T is successfully updated with the latest Android Jelly Bean 4.2.1 jelly bean leaked Firmware.

Leave a Reply