[Tutorial] How To Upgrade Samsung Galaxy S2 to Android 4.1.2 Jelly Bean

The users of the Samsung Galaxy S2 (GT-I9100G) can update their devices to Android 4.1.2 Jelly Bean (I9100GXXLSR) through Samsung Kies or by using OTA (over-the-air) updates. In case they face difficulties while updating via these two ways, there is also a manual process which is explained below.

Note – This tutorial is only for Samsung Galaxy S2, model number GT- I9100G. Proceed at you own risk, TechZune will not be responsible for anything that goes wrong.

Also, we do make sure that nothing wrong will happen if you are following each and every step correctly!

[Tutorial]-How-To-Upgrade-Samsung-Galaxy-S2-to-Android-4.1.2-Jelly-Bean

Things to keep in mind before upgrading using the manual method:

  • You must have a proper backup of your data
  • Ensure that your Samsung Galaxy S2 is fully charged
  • You must have the USB drivers for your device installed on your computer
  • USB Debugging must be enabled
  • After flashing the firmware, you will lose custom ROMs such as CM10, Paranoid Android or AOKP installed in your device
  • You will also lose custom recovery such as ClockworkMod Recovery or TWRP Recovery if you have any
  • After installing it on your Galaxy S2, you will lose root if you have any
  • This tutorial uses Odin that only works on Windows. For other platforms like Linux and Mac OS, the users have to use cross platform tool Heimdall to flash this firmware.

Steps To Upgrade Samsung Galaxy S2 to Android 4.1.2 Jelly Bean:

Step 1: Download Android 4.1.2 Jelly Bean (I9100GXXLSR) for Samsung Galaxy S2 (GT-I9100G) and extract the file.

Step 2: Download Odin 3.07 and extract the file.

Step 3: Power off Galaxy S2 and put it on the Download Mode. To do this, press and hold the Volume Down and Home buttons while pressing the Power button until the Samsung Galaxy logo appears on the screen.

Step 4: Run Odin 3.07.exe as an Administrator.

Step 5: Connect Galaxy S2 to your computer via the USB cable. If the device is connected properly, one of the ID:COM boxes will turn yellow with the COM port number.

Step 6: Select the following files in the Odin at relevant tabs from extracted I9100XWLS8 firmware folder:

  • Click on PDA and select the .tar file with CODE in its name
  • Click on Phone and select file with MODEM in its name (Ignore this step if there is no such file)
  • Click on CSC and select file with CSC in its name (Ignore this step if there is no such file)
  • Click on PIT and select the .pit file. Use this file only if you get it while extracting the zip file mentioned in step 1 or else just ignore it

In case the extracted zip files don’t have any modem, CSC or pit file, it means that you don’t require them. It’s the file with .tar.md5 extension that is a must have and should be flashed through PDA section

Step 7: In the Odin, ensure that Auto Reboot and F. Reset Time checkboxes are selected. In addition, if you are using a .pit file, ensure that re-partition checkbox is selected.

Step 8: Click on the Start button to begin the flashing process.

Step 9: Once flashing is done, you will see a PASS message with a green background in the left-most box at the top of the Odin.

The device will now restart on its own. After you get the Samsung logo on the home screen, unplug the device from the computer. You are done!

Android 4.1.2 Jelly Bean Official Update Available For Samsung Galaxy S2 (GT-I9100G)

Samsung had started to push Android 4.1.2 Jelly Bean update to the Galaxy S2 (GT-I9100G). Samsung managed to keep true to their word that the Samsung Galaxy S II would officially see Jelly Bean. This will put the device on software that is as up to date as the Samsung Galaxy S3 and the Samsung Galaxy Note 2. The Galaxy S2 was the best-selling Android device of 2011 and has a very large user base that is why Samsung keeps on updating this device with all the new Android versions as they want to provide the Galaxy S2 users with their best support experience.

Android-4.1.2-Jelly-Bean-Official-Update-Available-For-Samsung-Galaxy-S2

The update is official, which means you can get it via Kies or an OTA.

Official Firmware Details:
Android Version: 4.1.2 – Build JZO54K
PDA: I9100GXXLSR
CSC: I9100GXEFLSR
MODEM: I9100GXXLSR

The update brings a lot of Jelly Bean goodies. This includes Jelly Bean’s beloved Project Butter for a smoother and more consistent UI. Other features that come with the update include:

  • Full User Interface Revamp (Same UI as of the Galaxy S3 and Galaxy Note 2)
  • Improved Camera features
  • 2 Home screen modes
  • New widgets
  • New lock screen
  • Samsung’s S Cloud services
  • Samsung features like Smart Stay, Pop-up Play, and Direct Calling
  • Touchwiz Nature UX
  • New notification bar with more toggles
  • Lots of other stuff

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