Galaxy S II GT I9100G

How to Update Galaxy S II GT I9100G with Latest Cyanogen Mod 9 Firmware

Procedure to Update Galaxy S2 GT I9100G with CM9 Firmware Update:

  • Download Mode in Galaxy S2 GT I9100G can be entered by Download mode can be entered by pressing Volume Down Key + OK button, and holding both simultaneously press the Power Button.
  • Up next you need to run the “Zadig.exe” in the drivers folder of the heimdall suite and then from the drop down list you will have to select Samsung USB Composite Device or Gadget Serial and then you will have to click on the Install driver. Please note that just in case if the device gives out a prompt and is unable to verify the publisher of the driver then Ignore it and select “Install this driver anyway.”
  • Now, the heimdall can be used safely in your computer. Up next, Untar codeworkx’s kernel into the Heimdall directory and in the command prompt, you need to enter the below mentioned command.

heimdall flash –kernel zImage

  • After entering the above command, you will see that a blue transfer bar will appear on the phone showing the kernel being transferred and then the device will reboot automatically.
  • So there you go, the Clock Work Mod recovery has been successfully installed in your Galaxy S2 GT I9100G.
  • Download Google Apps and Cyanogen Mod 9 Firmware package from here to your computer. Once downloaded, you need to connect your phone and place these two zip files in your device. Disconnect the device and turn off the same so that it can be entered in the recovery mode.
  • Recovery mode in Galaxy S2 GT I9100G can be entered by holding the Volume Up button + the Home key button (the middle button). While holding these both buttons, you need to turn ON your device. Once you enter into the recovery mode, you need to select “Wipe data/factory reset” & “Wipe Cache partition” so that this will clear the cache which is there in your device.
  • In the recovery mode, select “install zip from sd card” > “choose zip from sd card” to select the Cyanogen Mod 9 Firmware Update package and the Google Apps Package.
  • Now once the process is over, select +++++Go Back+++++ to get back to the main menu, and select the Reboot system now option. The Samsung Galaxy S II G should now boot into Cyanogen Mod.

Note: In a rare case if the device refuses to boot  or gets in the boot loop mode, you need to re insert the battery and turn ON the device normally. You can also re apply the update by following the above mentioned steps.

Congrats, you have now successfully applied the latest update of Cyanogen Mod 9 firmware in your device. Do let us know in the comments section just in case if you face any issues as we will try our level best to sort out the same.


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  1. jim dep

    April 29, 2013 at 4:30 pm

    Update via internet no pc no kies when?

    • Pradeep Neela

      June 22, 2013 at 4:40 pm


  2. rumel

    April 15, 2013 at 5:59 am

    How to upgrade samsung galaxy s2

    • Pradeep Neela

      April 17, 2013 at 4:34 pm

      to which firmware you wish to update?

      • unaize

        May 13, 2013 at 2:18 pm

        which is the best UI available for Galaxy S II GT I9100G ?? how to install it

        • Pradeep Neela

          June 1, 2013 at 1:19 pm

          Cyanogen Mod seems a good option with good UI

  3. shaik fayaz

    March 14, 2013 at 11:02 am

    I want new update

  4. visit website

    October 7, 2012 at 4:08 am

    Thanks a bunch for sharing this with all folks you actually understand what you’re speaking approximately! Bookmarked. Kindly additionally talk over with my website =). We will have a link exchange contract between us

  5. Javidaliengg

    June 14, 2012 at 12:42 am

    I have updated the cyng9 nightly in my gt-i9100g its working good. But the external SD card is not able to read by any app which required the data from ex-sd card. So if any solutions please inform me.

  6. Ayaza26

    June 7, 2012 at 12:45 am

    I suggested all gt i9100g users please join our facebook group named Samsung Galaxy S II I9100G here you find complete info about your device and for advice many developer available there and I clarify this cm9 nightly is full stable and updated daily u apply that rom without any hassle

  7. Mtmakki

    June 6, 2012 at 12:27 pm

    where is the ICS for Galaxy SII GT I9100

  8. Adwaith08

    June 6, 2012 at 8:07 am

    What are the features of this one

  9. Hermanshah

    June 6, 2012 at 6:09 am

    recently I upgraded my firmware, now I have Android Version 4.0.3, I9100gdxlp6. My stock firmware is I9100GDZKL3.   I cant find any download link for this stock firmware. Really appreciate your assistance. – Malaysia 

  10. Sri328

    June 5, 2012 at 11:51 pm

    there is no stable release of CM9 for S2, and the link you provided also directs only to CM7.

  11. Andrew Van Niekerk

    June 5, 2012 at 11:03 pm

    There is no stable version of Cynogenmod 9 for the SII. Only in nightly. 

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