Galaxy S3 I9300T users who have already updated their smartphones to the Android 4.1.1 official Jelly Bean firmware are bound to lose root access on their devices. However, if you are one such user looking for a solution, then you need to re-root your phone using CF-Root tool (with ODIN method) in order to regain root access.
CF-Root is reportedly the easiest method and eliminates the need to install ClockworkMod Recovery (CWM) on your phone. Once you have rooted the device, you will have access to install root-based apps, custom recovery and system tweaks.
Key Points to Note
- CF-Root brings you root access with a stock-like Android experience and is meant to be used along with stock Samsung firmware or the official firmware only. It will install SuperSU (super-user) access, clean up the cache partition and re-flash the stock recovery.
- Using CF-Root will invariably increase the flash counter by '1' on the device after every root or custom ROM installation. Users are advised to use Triangle Away to reset the flash counter after every boot and thereby recover their warranty status on the device.
- Ensure that your Galaxy S3 device is running Android 4.1.1 official firmware (not a custom firmware), before applying this root method. Trying to root incompatible firmware might brick or damage your device. Proceed with extreme caution.
- Make sure that the correct USB drivers are installed for your phone to enable connectivity with the computer. Download Samsung Galaxy S3 USB drivers
- IBTimes UK advises users to back up apps, important data and settings to avoid risk of data loss while rooting the Galaxy S3 on Android 4.1.1 official Jelly Bean firmware.
- Those who have already installed ClockworkMod Recovery (CWM) or TWRP recovery are advised to use one of these tools to back up data, as it creates a complete image of your existing ROM or firmware.
- Enable USB debugging mode on your phone by navigating to Settings > Developer Options to help resolve USB connectivity issues with the computer.
- The instructions provided in this guide are meant for reference purpose only and do not cover any warranty claims involving device damage or issues arising out of rooting the Android 4.1 official Jelly Bean firmware. Users are advised to proceed at their own risk.
How to Root Android 4.1.1 Official Jelly Bean Firmware on Galaxy S3 I9300T
Step 1 - Download Root Android 4.1.1 for Galaxy S3 I9300T to your computer and extract the zip file to the desktop.
Step 2 - Download ODIN v1.85 which is needed to root Android 4.1.1 on your Galaxy S3.
Step 3 - Power off your phone and boot into Download Mode. To do so, press and hold the Volume Down and Home buttons together, and then tap the Power button until you see the construction Android robot icon with a triangle. Hit the Power button again to confirm entry into Download Mode.
Step 4 - Launch ODIN on your computer and connect your phone to it via USB, while your phone is still in Download Mode.
Step 5 - If your phone connects successfully, one of the ID:COM boxes will indicate yellow with the corresponding COM port number. This step is a bit time-consuming and may take about 5 to 7 minutes.
Step 6 - Choose the file that needs to be flashed / installed on your phone, which can be found among the extracted files in Step 1.
- Click the PDA button and choose the file 'CF-Auto-Root-m0-m0du-gti9300t.zip'.
Step 7 - In ODIN, check the Auto Reboot and F. Reset Time options, if they are not already enabled.
Step 8 - Click Start button in ODIN and the firmware rooting process will begin, which might take a few minutes to complete.
Step 9 - Once the rooting process is completed, your phone will reboot into Recovery Mode automatically and install the root package / files. Your ID: COM box will now turn green.
Step 10 - When you see the home screen, disconnect your phone from the computer.
NOTE: If the device fails to boot into Recovery Mode automatically (as given in Step 9) or root your device properly, then repeat the entire procedure again.
OPTIONAL: If the issue persists, repeat the steps in the entire tutorial, but make sure all options in ODIN are left at default values, except the Auto Reboot option is NOT checked. Then after rooting is complete (Step 9), do the following:
Step 11 - Remove the battery to power off the phone forcefully.
Step 12 - Press and hold Volume Up, Home and Power buttons to directly boot into Recovery Mode. This will begin the rooting process for your phone.
Samsung Galaxy S3 I9300T is now rooted on Android 4.1.1 official UTA update. Check for the SuperSU app in your apps list to verify the installation process.
[Source: Team Android]