The LTE variant of Samsung Galaxy S3 received the official Android update OS version 4.1.2 Jelly Bean. The update is available to download over-the-air and through Samsung KIES. If you have already updated the device, you can follow this guide to root your device. Before you begin though, you need to ensure that you have at least 50% battery left and that you have the correct USB drivers. Moreover, please know that this tutorial will be applicable to root Galaxy S3 LTE variant alone. Finally, please be certain that you have the USB debugging mode on and that you backup all the sensitive data that may be on your phone since this process will remove all your data. If you are ready, please follow the tutorial below.
- You will need to download CF-Auto-Root as this will help in the process. Please download as per your model GT-I9305, GT-I9305T or GT-I9305N
- You will also need to download ODIN; Click Here
- Extract the files you downloaded in step 1 and install the package downloaded in Step 2
- You will need to shut down your device and restart it after 5-7 seconds into Download Mode. In order to do so, you will need to press the volume down, home and power button until the device turns on. Press the volume up button in order to enter the download mode
- Launch Odin on your computer and connect the Galaxy S3 to the computer using the USB cable while it is still in the Download Mode. Odin should detect the device and the corresponding COM port should turn yellow.
- Click the PDA button and select the .tar.md5 file
- Please ensure that re-partition and in ODIN is not selected. Also ensure that Auto Reboot and F.Reset checkboxes are checked
- Once you are sure that you have followed the above steps as they are, please click the Start button in ODIN. The installation should now begin and will take some time
- Once the flashing is complete, your phone will restart and you will see a PASS message with green background. This is a sign that your flash was successful. Please know that the restart will take some time as it is a new install. Once the phone reboots, please install an application that requires root in order to check if the process was successful. If not, please repeat that process.
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