How to install Jelly Bean on your Samsung Galaxy S III
If you don't already have it installed, download and install the Samsung Kies software for your PC from here.
This will install the necessary drivers for your Galaxy S III, so you can complete the firmware upgrade. Close the Kies application once you've installed it.
Download the official Samsung Galaxy S III Jelly Bean firmware from here. It should be an 780.5MB file.
Once the download is completed, extract the firmware file (ending in .tar.md5) to your PC. We recommend extracting the file to your main hard drive. In our case, this was the C:\ drive.
Next, extract the Odin3_v3.04.zip file to your PC.
Open the Odin.exe file on your computer. It should look like this:
Click on the 'PDA' box in Odin and open the firmware you downloaded and extracted to your PC in step two. It should look like this:
Turn off your Galaxy S III. Put the phone into bootloader/download mode by holding the power button together with both the home and volume down buttons. Hold these three buttons simultaneously until you see this screen:
Press the volume up button to continue and you'll then see this screen:
Plug your Galaxy S III into your PC using the USB cable. The phone should automatically be detected by your computer and will be displayed in the ID:COM box on Odin as shown below. (On our PC the port is COM8, but it may be different number on your computer).
Press Start on Odin. You should see a progress indicator on Odin and a progress indicator bar on your Galaxy S III, as shown below:
Ensure you DO NOT remove the USB cable from your Galaxy S III while the firmware is upgrading. Once the process is completed, your Galaxy S III should restart.
To confirm you're running Jelly Bean, go to the settings menu on your Galaxy S III, scroll down to "About" and you should see the Android version listed as 4.1 as shown in the image below:
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