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In what is seen as some great news for the owners of the international LTE version of Samsung Galaxy S3 (GT-I9305), the South Korean tech giant started rolling out the Android 4.1.2 Jelly Bean update for the device Wednesday.

If you are an owner of Galaxy S3 GT-I9305 and have already updated your device to the latest firmware version, you may want to root it to gain full control over the phone. Below is an easy-to-follow step by step tutorial to help you perform a root on your International Samsung Galaxy S3 LTE running Android 4.1.2 Jelly Bean.

In case you are yet to update your device to the latest Android version, you can follow our tutorial here for installing Android 4.1.2 Jelly Bean on Samsung Galaxy S3 LTE (GT-I9305).

In the rooting process explained below, a tool called CF-Auto-Root will be flashed in Galaxy S3 I9305 running I9305XXBLL3 firmware using ODIN. Although the guide uses I9305XXBLL3 Android 4.1.2 Jelly Bean, which may not be the firmware variant you have, the steps will be the same for other versions of the firmware update released for Galaxy S3 I9305.

After the device is rooted, its warranty will get void. However, the users can claim it by applying the official firmware update. There are some other perquisites to consider:

- The process is meant only for Galaxy S3 I9305. Therefore, the users are advised to check their device’s model number in: Settings > About phone.

- Make sure the device has at least 80 percent of battery power.

- Back-up all your important data.

- Download and install USB drivers for Galaxy S3 LTE and enable the USB debugging mode.

The users must note that IBTimes will not be held responsible for anything that goes wrong. They should proceed at their own risk.

Rooting Procedure

Step 1: Download CF-Auto-Root to root I9305XXBLL3 firmware (Filename: CF-Auto-Root-m3-m3zh-gti9305.zip) and extract the zip file.

Step 2: Download Odin3 v1.85.

Step 3: Power off the phone and put it on Download Mode by pressing Volume Down, Home and Power buttons together. Once you see a warning message on the screen, press Power button again to enter Download Mode.

Step 4: Run Odin3 v1.85.exe as an Administrator.

Step 5: Connect the Galaxy S3 I9305 with your PC using USB cable. A message will appear saying “Added” under the Odin's message box. In addition, if the device is connected properly, you will see COM port with a number in Yellow.

Step 6: Click the PDA tab in Odin and select the CF-Auto-Root-m3-m3zh-gti9305.tar.md5 file.

In Odin window, make sure that Auto Reboot and F. Reset Time checkboxes are selected.

Step 7: Click on the Start button in Odin to begin the installation.

Step 8: When flashing is completed, you will see a PASS message with green background at the top of Odin. Your device will now reboot automatically.

After you see the Samsung logo, you can then unplug the USB cable to disconnect your phone from the computer.

[Source: Android Jinn]

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