Official Android 4.1.2 VJMS3 Jelly Bean Firmware on Samsung Galaxy S2 GT-I9100

  1. Firstlydownload the official firmware file from here and save it to your PC
  2. Secondly,Download ODIN 3.07 from here on your PC and save the same to PC. 
  3. Now, extract the downloaded firmware zip file to your PC, preferable on the desktop and make sure that you will obtain a .tar.md5 file and some files in some cases.
  4. Next, extract Odin zip file and make sure you’ll get Odin3 v3.07.exe plus other additional files.
  5. Now, turn off the smartphone and completely (wait for confirm the shut-down task the vibration approximately 6 seconds).
  6. Boot the S2 device into Download Mode. (For doing that press and keep holding the Volume Down + Home + Power buttons simultaneous until an Android icon like a robot is displayed and in this moment press the Volume UP button, the Download Mode will appear.
  7. Now, open the ODIN app by launching the ODIN v3.07.exe file that you have already extracted above.
  8. While the smartphone is connected in Download Mode, connect it to PC using the USB cable.
  9. Now, look on the ODIN interface and when the smartphone is recognized successfully, a notification message will say “Added!” and additionally the ID: COM together with a port number box will be colored yellow
  10. Note: In case the ODIN doesn’t display the added message, change the USB port to the PC and reinstall the suitable USB drivers once again on the PC.
  11. Now, chose and load the necessary files for install the new firmware as below:
    • From ODIN app select the PDA checkbox and then browse and load the ‘.tar.md5′ file
    • Now, select the Phone checkbox and then browse and load the file that contain the modem word in its name.
    • Click on the CSC checkbox and select the file that named ‘CSC
    • From the ODIN app click the PIT checkbox and load the ‘.pit’file.
    Note: Ignore the steps b, c and d if there is no such file.
  12. Important: In ODIN app, make sure that the Auto Reboot and F. Reset Time  options are enabled by selecting the checkboxes, but the Re-Partition checkbox must be unselected, select the Re-Partition checkbox only id a .pit file was loaded into ODIN in the above corresponded step.
  13. When all the steps are correctly followed, press START button from ODIN to start the installation firmware process.
  14. Now wait until the firmware flashing process is done and the smartphone will reboot automatically.
  15. The flashing process is completely done when a PASS message with a green background will be displayed in ODIN interface (Left-most box at the very top of the ODIN app).
  16. Now you can disconnect the USB cable from the PC
That’s it; you successfully learned how manually update the S2 GT-I9100 with the latest stock Android 4.1.2 I9100VJMS3 Jelly Bean OTA firmware.
Verify the firmware version that is running of the phone by navigating to: Settings > About Phone:
Troubleshooting – In case the smartphone is stuck or is entering on a boot loop at the boot sequence after the last reboot you have to do :
  • Boot the smartphone into Recovery Mode by pressing and keeping hold the Volume UP + Home + Power buttons simultaneous.
  • Now, from the Recovery Mode perform a Wipe data/Factory Reset as well as Wipe Cache Partition.
  • When the wipe process is done, return on the Recovery Mode main menu and from there choose the reboot system option.
 Note 1: For navigating between Recovery Mode options use Volume Keys and for selecting an option in recovery use Power Key.
Note 2:  When a wipe task is applied all the device’s internal memory data will be erased, not the data on the SD card memory.

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