If you are a Galaxy S3 user and want to run your device on Android 4.1.2 then this tutorial is for you. In this guide we will learn to root Galaxy S3 GT to XXBMA3 Android 4.1.2 Jelly Bean - model numberI9305. The installation is only possible on rooted devices since we would be using custom recovery tools like ClockworkMod.

Please note this tutorial is only for Samsung Galaxy S3 GT I9305 models and should be rooted on those devices. Please follow the pre-requisites and steps carefully or you might get your device bricked (happens rarely now - but you need to be cautious).

Pre requisitesbefore you root Galaxy S3 GT toXXBMA3 Android 4.1.2 Jelly Bean custom ROM:

Create a backup of all important data in your Galaxy device.Download and install USB drivers for Galaxy S3 in your computer.Enable USB debugging option by pressingMenu>Settings>Applications. Navigate and tap onDeveloper Optionsto ensure thatUSB Debuggingis enabled.Make sure that ClockworkMod recovery is installed.Ensure that your S3 carries more than 80% of charge.

Root Galaxy S3 GT to XXBMA3 Android 4.1.2 Jelly Bean:

Required files to be downloaded: ROM package,Odin&

Samsung KIES.Download and save the files on your computer and extract theroot package.Install and open the ODIN.Switch your S3 off and reboot the device into download mode by pressingVolume Down,CenterandPowerkeys simultaneously.Using a USB data cable connect your device with computer.After connecting S3 with phone, the ODIN'sID:COMsection should become yellow or blue and the"added!"message should be displayed.Note: If not, remove the USB cable, turn off Odin and re-install the drivers; then repeat the procedure as explained above.On theODINselectPDAand pick theCF-Auto-Root-m3-m3zh-gti9305.tar.md5file and click onstartbutton.When the process is completed, you would get a passmessage on Odin screen.Disconnect your Galaxy S3 GT and reboot your device into the new ROM.

Your Galaxy S3 GT model numberI9305 would now be running the XXBMA3 on Android 4.1.2 Jelly Bean. In case of any problems, do let us know along with any feedback.