Here’s the root method that works to your Samsung Galaxy S3 if lately updated to the latest Android 4.1.2 Jelly Bean firmware with baseband build I9300XXELLA. The I9300XXELLA is an official release update that fixes the infamous “Exynos memory exploit” issues and firstly distributed by Samsung in United Kingdom. Rooting with Android 4.1.2 Jelly bean with other means will not tend to work at this point, but using chainfire’s CF-Auto Root still works. You can also use this method, since a lot of Galaxy S3 users already reported it without having any issues. Although, one downside here if you are new in rooting, is that after a reboot it shows the binary flash counter as 1, but all says official. The device status also shows as modifed in the settings. Using chainfire’s other apps called “tringale away” will reset the binary flash counter.
In addition, installing CF-Auto Root into your phone can still receives official update from Kies and via OTA (Over the Air). You can also easily unroot it in the future if you need to. Just flah the original stock rom and you are ready to go.
Root I9300XXELLA Android 4.1.2 Jelly Bean
- Make sure that your phone is fully charge.
- Back up all important files stored from the device
- Use Windows based computer or laptop, Odin will not work on MAC and LINUX.
1. Download the CF-Auto Root, here’s the link for GT-I9300 since chainfire has builded several files for other Samsung Galaxy S3 variants. Extract or “unzip” after a sucessful download.
2. Download and install the USB driver. link
3. Grab Odin and Run it into your computer. link
– Make sure NOT TO CHECK the “Repartition” option.
4. Click on the PDA button the browse and select the CF-Auto Root tar file.
5. Set your phone in download mode (Turn off phone, then hold Volume Down+Home+Power button simultaneously) Then it ask you to press a Volume Up button to continue.
6. Connect the phone to your computer
7. Hit the “START” button to begin rooting.
8. Wait until it finishes flashing, you can see a word “PASS” once its successfuly completes.
This process wil only takes around 30 secnds to complete.
9. Wait until the phone completely reboots.
10. Done! remove it from computer connection. (if it took you more than 30 seconds, you need practise!)
– NOTE: Sometimes the device does *not* boot into recovery mode and root your device. Just do the entire procedure again if this happens. If it still will not install root and such, make sure that in Odin “Auto Reboot” is not checked. Then after flashing, pull the battery, and boot with VolUp+Home+Power button to boot into recovery manually. This will start the install process.
Fixing possible errors while installing root
Okay, I followed the instruction carefully above but this is what’s on Odin says:
Now it’s been an hour and nothing has happens.
CF-Auto-Root-m0-m0du-gti9300t.tar.md5 is valid.
Checking MD5 finished Sucessfully..
<ID:0/004> Odin v.3 engine (ID:4)..
<ID:0/004> File analysis..
<ID:0/004> Get PIT for mapping..
<ID:0/004> Firmware update start..
The flashing will take just around less than a minute or more.
If the above issues occurs,. Disconnect the phone from the USB cable, this time remove the phone’s battery after a few seconds and replace it back. Then just repeat the whole proceess again.
If this root method perfectly works for you, don’t forget to spare some donation to Chainfire for his great job.