Download & Install official Android 4.1.2 Jelly Bean XXELK4 Firmware for Samsung Galaxy S3

Want to enjoy Multi Window feature (like Galaxy Note 2) on your Samsung Galaxy S III GT-I9300? Yes, you can try it now with other interesting features like Page Buddy, customized notification panel, Smart Rotation, continues input in Samsung Keyboard, Paper Artist and new Gallery applications too. All of them are available in latest leaked official Android 4.1.2 Jelly Bean XXELK4 Firmware for Samsung Galaxy S3. And it is pre-rooted as well so you don’t need to root it yourself. Note – this is a test firmware. Only install it if you are willing to test the risk as a beta tester…

Android 4.1.2 Jelly Bean XXELK4 Firmware for Samsung Galaxy S3

I seldom try official leaked firmware nowadays. There are too many of them (yes, more test firmware for Samsung Galaxy S3 will come). Want to stay ahead of others? Try it and bear the risk.

Installation guide ~ How to install firmware on Samsung Galaxy S3 with Odin? (Video)

Download official Android 4.1.2 Jelly Bean XXELK4 Firmware for Samsung Galaxy S3 here.

  • hola

    Tq jayce..already install πŸ™‚

  • Norman Kang

    Does it work? I mean the multi screen, is it lagging as note 2 hav 2gb ram & s3 only hav 1gb ram…pleeeaaassssseeeee comment…

    • Try to ask hola. I did not try it yet. Busy…

      • hola

        S3 no lag..
        don’t worry about ram..
        i can feel more smooth n butter πŸ™‚
        my s2 already 4.1.2 can feel difference and stabil
        S2 dual core can handle it..
        don’t worry about ram..

        • bigsero

          bro…. you have Smemo in your multiview apps to use?????

  • F.S

    Hi there,recently I flashed siyah kernel and I have read the description from the author,it says siyah only support cm 10 or samsung jelly bean.

    If I want to try this firmware,how do I remove siyah kernel or return to official kernel ?

    • hola

      no need to remove..
      just install it..
      remember this leak firmware not official..
      this firmware no need to root..
      it is pre-rooted

      • Norman Kang

        Thanks you very much…will try it soon πŸ™‚

        • hola

          Welcome.. πŸ™‚

          • not as title says

            i believe title is wrong (from top of page) Download & Install official Android 4.1.2 Jelly Bean XXELK4 Firmware for Samsung Galaxy S3 which part of OFFICIAL is it ???

  • ajwad

    hey, i heard that the binary count will increase? can we use triangle away to reset it??

  • bigsero

    hola bros!!!! pues le cuento que recien acabo de instalar omegaroom v33, basado en jelly bean 4.1.2 y funciona muy bien! el multiview funciona exelente en general verdad, me imagino algunos detallitos los van a ir perfeccionando, el asunto esta en que no esta Smemo entre las aplicaciones para usar en multiventana lo cual me parece muy mal…. que me cuentan ustedes?

    • hola

      yeah omega v33 good n smooth..
      1 of the best rom for S3

  • yassine

    is italian supported? plz answer

    • yassine


      • hola

        WANAMLITE always support multilanguage V5.0
        including arabic

  • Charles

    jayce helpp mee
    please give me the mediafire link
    cause my download speed at my country is extremely slow
    and when i download it was just stop
    please helpp mee
    no more hotfile
    just mediafire pleasee…
    help me jayce :'(

    • Sorry Charles, I don’t have other download link.

  • turgut

    Hi jayce

    I have problem. I want to download android rom my HTC X7500 athena

    please can you help me


    • Sorry turgut, I don’t think this model can support Android.

  • Nathanael


    Is this a full wipe firmware?

    • Muhd Afiq

      No, but always do a nandroid backup first because this is a test firmware.

  • Muhd Afiq

    Guys this leaked firmware has no modem so you guys can expect a slow connection especially in Malaysia

    • Nathanael

      Then can we install a modem? I just installed it.. seems normal so far… its not wipe too

      • Muhd Afiq

        Currently you are using the old modem from previous firmware. So it should be ok.

  • Ash

    Hello Jayce,

    Just want to ask some questions, is it true regarding the modem as what Afiq there mentioned and how do we solved that problem?

    Another one is, currently using this and no issue found. Everything works find and I give it a day to see whether the lag on phone starting resolves. However what worries me a bit is the antutu benchmark scoring. Mine previously from Malaysia JB unrooted was around 12,000. Now only around 7,000 to 8,000 although no real effect on performance. Any idea why this drastic drop on scores?

    Thank you.

    • Muhd Afiq

      It seems that im wrong if you install this firmware, the old modem from previous firmware will still be in your phone. sorry for the confusion guys but keep in mind that this is a new firmware so there should be a new modem just my 2 cents. Correct me if I’m wrong.

    • Hi Ash, don’t ‘trust’ benchmark so much. Score is not up to standard because the benchmark software might not support the latest Android OS yet.

      If it does not lag in real world usage == it is a good firmware.

      • Muhd Afiq

        Hi Jayce do you install this firmware?

      • Ash

        Thanks Jayce, dont really mind, just curious. Thanks btw πŸ™‚

  • E-dizzle

    Will this work on T-mo GS3 T999?

    • Muhd Afiq

      No, your phone will brick if you install this. Sorry this is is for international version only.

      • E_dizzle

        @ Muhd Afic. Thank you.

        • Hayzsky


  • Trent

    Hi Jayce

    any other issues to report after your installation of jelly bean?

    • Hi Trent, I am super busy lately. No time to try out this firmware yet.

    • hola

      no prob for me..
      always improve

  • hola

    News for Note2
    N7100XXDLJ2 Android 4.1.2 Jelly Bean test firmware
    nice..already test.. πŸ™‚

  • Trent Saunders

    Hi Jayce

    I got message advising the official update via kies. Can I update via kies if I have rooted?

    I get message “Your device`s current firmware version is not supported to update firmware via kies”

    Please let me know what my alternatives are.


  • Trent Saunders

    I received notification about formware upgrade via Kies. I accepted terms & Now I get message “Failed to run firmware upgrade. Unkown error occurred”

    • Hi Trent, are you using official firmware? If no, you can install this new firmware with Odin directly.

  • mafizul

    will it work on galaxy s3 I9300T (Vodafone).


    • Sorry mafizul, I am not sure too. Please consult others with same model at XDA Forum.

  • Andrie

    Hi Jayce,

    I installed this 4.1.2 two weeks ago and it’s good. Seems that contacts and phone are still laggy.
    I wonder why my device status is “normal” as it is pre rooted.


    • No idea about the status, Andrie.

  • Yaw Sant

    Hello Jayce…May this will work on gt-i9300T in official?

    • No idea, Yaw. Try to consult others with this model at XDA Forum.

  • Trent Saunders

    Hi Jayce

    I have installed 4.1.2. Although everything seems to be working okay, in some instances, a red “frame” appears around the outside of the screen. This only occurs occasionally & I was wondering if it is part of the new firmware.

    • Turn off Developer options should solve this.

  • Vannak

    after complete this step, let just example that my device now run 4.1.2, so is it root yet? help to tell me please……..

    • No, you need to root it manually.