How To Root Galaxy S2 Android 4.1.2 Jelly Bean firmware – Guide
The Samsung Galaxy S2 GT-I9100 has received the Android 4.1.2 Jelly Bean firmware update through OTA and Samsung KIES that bumps up numerous useful features including Galaxy S3 UI and Nature TouchWiz UX. Those of you have received the Android 4.1.2 update and installed it on your Galaxy S2 and now looking for a rooting tool to have full control over the device, here you can do so using the custom kernel.
This guide shows you how to root Galaxy S2 on Android 4.1.2 Jelly Bean firmware, use a Windows PC with USB drivers installed, you can download 32 bit (x86) Windows drivers from here and 64-bit (x64) Windows drivers from here. Rooting doesn’t wipe anything but just for safety backup everything because the below procedure may wipe data especially if you’re on custom ROM, you can sync your contacts with Gmail account and for messages use SMS apps, lastly use file expert app to backup apps.
DISCLAIMER: Please proceed the below guide at your own risk, Android Egis will not be held responsible if your device lost data or gets damaged following this guide.
Step #2: Copy SuperUser zip file to root of your SD card.
Step #3: Unzip Odin zip file into folder on PC.
Step #4: Open the folder where you’ve unzipped above file and run odin3 v1.85.exe.
Step #5: Turn the device off.
Step #6: Reboot the device into download mode, to do so reboot phone by holding down volume down, home and power buttons until warning screen turns on, then press volume up button to enter in download mode.
Step #5: Once you’re in download mode plug the device to PC using USB cable. Odin will detect the device, ID:COM will turn yellow and a message saying ADDED will appear. (Note: If Odin doesn’t detect the device, make sure that USB drivers are properly installed on your computer).
Step #6: Click on PDA Button and locate .tar file you downloaded in first step (Note: Don’t make any change, just make sure that re-partition is unchecked).
Step #7: Click on Start button to start installation, once the installation done, your device will reboot itself and you’ll see message saying PASS (Note: If Odin refuse to install the update and show message FAIL, or get stuck, close the Odin and unplug device, then pull out battery from the device for a few seconds. Then put the battery back to the device and reboot into download mode. Then install the firmware again).
Step #8: Turn your phone off again reboot into recovery mode by holding down volume up, home and power buttons.
Step #9: In recovery mode, select “Install Zip”, then select “Choose zip from Internal sdcard” or “Choose zip from sdcard”. (Depending on where the Superuser zip file is) and locate the zip file to start installation.
Step #10: Reboot device.
That’s it, you’re done, your Galaxy S2 Jelly Bean firmware is rooted now.