Root XXJVS Android 2.3.5 Gingerbread Firmware with CF Root Kernel from Chainfire!

So, you’ve already installed the leaked XXJVS Android 2.3.5 firmware from Samsung. And now as always, you want that root access to become great superuser of your Galaxy S, again. Well, good. We were using the XXJVR Root for the time being to root XXJVS, but now our favorite developer Chainfire has just outed his CF Root kernel for XXJVS too, which lets users root XXJVS firmware without any pains whatsoever and without any bugs — WiFi is working fine now, it was a problem with XXJVR’s root.

Before we see the download links and installation instructions, let’s go through boring compatibility notes and warnings:

[error]This guide is applicable only for Samsung’s Galaxy S international version (i9000) running on XXJVS firmware. Check your phone and firmware version and in Settings – About Phone. The model number has to be “GT-i9000” and the build number “GINGERBREAD.XXJVS” for the this root to be compatible with your device. If it’s not so, simply don’t try this or anything discussed here on your android device; in fact, don’t even think about it if you care about your android device.[/error]

Warning: Warranty may be void of your device if you follow the procedures given on this page. You only are responsible for your device. We wont be liable if any damage occurs to your device and/or its components.

Quick Instructions: Make sure you’ve XXJVS firmware installed, as I said above too. Download the CF Root Kernel and flash it using Odin by selecting the kernel’s .tar file in PDA tab. Keep Re-Partition un-ticked. That’s it.

It’s okay if you didn’t get the root method discussed above because a detailed guide too is available for you, just below. Btw, if you wanna see a video first on ‘how to flash root kernel’ — check this video, which shows flashing the root kernel of earlier firmware XXJVB.

Step-by-step guide:

  1. Download CF-Root kernel first. Filename – Size 6.08 MB.
  2. Unzip the above file to a folder. You will get the .tar file – CF-Root-XX_OXA_JVS-v4.1-CWM3RFS.tar — inside folder. DO NOT extract the .tar file (even if you see it as a zip file, which it is not). You need to flash the .tar file using Odin to gain root access and install the ClockworkMod Recovery (CWM) alongside. (If you’re getting zimage, it means you’ve extracted the .tar file too! — and that’s not a right thing to do.)
  3. Use the Odin software you used while flashing the XXJVS. No separate download is required.
  4. Switch Off your phone. Wait for vibration to confirm complete switch off.
  5. Boot your phone in Download Mode — Press and hold VolumeDOWN+HOME+POWER keys together.
  6. Open Odin now.
  7. Connect your phone to PC now. You’ll notice “Added! !” message in the Odin’s message box in the bottom left.
  8. On Odin, click the PDA tab and select the .tar file you got in step 2 — CF-Root-XX_OXA_JVS-v4.1-CWM3RFS.tar.
  9. Make sure “Re-Partition” checkbox is un-ticked. Leave the “Auto Reboot” and “F. Reset Time” checkboxes ticked.
  10. Double check step 8 and step 9.
  11. Click the Start button on Odin to flash the CF-Root kernel.
  12. After the CF Root is installed, phone will restart automatically. When the Galaxy S II Galaxy S logo shows up on phone, you can disconnect the cable from phone.
  13. Your phone is rooted now. That surperuser app is there!

That’s it. Thanks the Chainfire for this! And, if you like this article share it with friends and others who may need it.

69 Comment

  1. Leech9313123 says: Reply

    Really appreciate the tutorial, thank you.

  2. Saduna says: Reply

    boot animation doesn’t sounds after rooting my galaxy s. pls need help.

    1. Kapil says: Reply

      It won’t sound. There is no problem in that. It’s okay. Don’t panic — we all are living with that 😉

      1. Rama says: Reply

        Hello Kapil and all,

        I installed and I can see CWM, Supoer User and Tweaks. Does that mean I need not run OCLF on this..The performance is more or less same even after installing this.

        1. Kapil says: Reply

          Your phone is rooted now. No need to run any other root trick/app/software, like OCLF. FYI, merely rooting doesn’t affect performance of any phone in any way.


  3. Saduna says: Reply

    thanks for the tutorial… excellent work.

  4. saduna says: Reply

    im just missing that sound, thats it.
    Thanks Kapil

  5. Tezun says: Reply

    kapil or can anyone else recommend a good voodoo lagfix kernel for xxjvs?

  6. Kandb2010 says: Reply

    i cant see any superuser icon? Iv just flashed to 2.3.5 and then followed the root guide ?? Anybody else experiencing the same issue~???

    1. Tezun says: Reply

      its funny, that shouldnt happen, that means your device isnt rooted.

  7. Buyselkochi says: Reply

    Hi Kapil,ecellelent piece of work!!with this kernel I am seeing frequent disconnect with WIFI?Since I am using Tasker ,I have a profile to notifiy when wifi gets disconnected.Hence the issue is really  noticeable.Do you al so seeing this?

  8. TJ says: Reply

    hi, after flashing the rooted kernel my phone won’t boot past the Galaxy S Gt-i9000 samsung screen! I tried flashing twice but it just gets stuck there. the capacitative keys light up when touched though. what do you think is the problem?

  9. TJ says: Reply

    okay it worked, no worries, accidentally flsahed the wrong kernel haha silly me. Thanks a lot for this tutorial 🙂

    1. Kapil says: Reply


  10. Ankur Verma says: Reply

    Will this install CWM also ?

    1. Kapil says: Reply


  11. Harish Brahmanyapura says: Reply

    Hi Kapil.  Thanks to your excellent page, I went straight from Froyo 2.2 to Gingerbread 2.3.5.  Can you now enlighten me on the benefits of rooting with CF Root Kernel as you have mentioned on this page?  I don’t understand this too well, being a novice.  Can you please clarify?  Thanks. 

    Also, is Honeycomb only for Tablets, i.e., for large screens?


    1. Kapil says: Reply

      Hi Harish, I think you can search on Google — why root android phone.
      I root it so that I can use titanium backup (to save each app’s data when restoring it back) and custom recovery called, clockworkmod recovery (cwm) to install custom ROMs like CyanogenMod7.1 and MIUI.

      1. Harish Brahmanyapura says: Reply

        thank you.  will do.

        also, do you have any word on Ice Cream Sandwich for Galaxy S?

        1. Kapil says: Reply

          Not in coming 2 months at least. I guess it will take some 3-4 months from today 🙁

          But custom ROMs should be able to get that in 2 months from now.

  12. Emanuel Munteanu says: Reply

    TNX A LOT MAN !!! I was searching a whole evening for a guide like this…

  13. Steffen says: Reply

    Ik heb alle stappen netjes gevolgd, alleen hij blijft naar mijn idee wel erg stil..

    Er staat nu al een kwartier links in het vak Message: SetupConnection..

    Kan iemand mij vertellen of dit hoort, of dat er iets verkeerd is.

  14. Aaron says: Reply

    after installing this rom I’ve lost data connectivity, my service provider here uses the 850mhz freq. Is there a way to set the modem to this freq?

  15. Harish Brahmanyapura says: Reply

    Hi Kapil.

    I was reading elsewhere that the XXJVT has now become available.  Will you write an upgrade procedure for this as well?  Here is the link.


    1. Kapil says: Reply

      I know but since I didn’t like it, I didn’t cover it here. You can download that from anywhere and then install it like you did xxjvs. It’s simple, so we won’t be writing a detailed guide for it.


  16. Renato Vicente says: Reply

    I think there is something wrong with the files, they should check after putting the password and unlock they do not appear to tar but as rar files. If you do not fool me something wrong with the compression of files. I await response

  17. Renato Vicente says: Reply

    I have installed on my Galaxy S 2.2.4 XXJVP the gingerbread I’m very pleased with the performance and performance of my galaxy. The battery life has doubled. I wonder what the benefits of version 2.3.5? But continue to say that there is something wrong with the 2.3.5 files

  18. Jos van Eldijk says: Reply

    i have installed on my Galaxy S 2.3.5 gingerbread. after rooting, CF-Root-XX_OXA_JVS-v4.1-CWM3RFS, I’ve lost my data connectivity.

    Wifi is oke

    1. Kapil says: Reply

      Update APN settings.

  19. Gaucan says: Reply

    thank you very much,and the same for chainfire!!!!!

    1. Kapil says: Reply

      Chainfire rocks!

  20. Misumor says: Reply

    is this like lagfix on 2.3.5 XXJVS?

  21. Patrick says: Reply

    I’ve installed 2.3.5 XXJVS on my galaxy S, now I’m trying to root it. Before that, will my data wipe out after I root my device? Or I need to backup my data before start rooting my device?

    1. Kapil says: Reply

      Rooting won’t delete data. Go for it.

      1. Bong Escio says: Reply

        Hi Kapil after STEP 11, the text box status in ODIN says ‘setup connection…’ seems to be stucked.  Can I just close the ODIN and load it again. Do I need to unplug the SGS?

        1. Kapil says: Reply

          Yes, unplug phone and close Odin too, without any worry.

          1. Bong Escio says:

            Hi Kapil, I unplug the phone restart ODIN. But no connection detected anymore in ODIN. Can i shutdown my phone and boot to download mode again. I ask because I am under the impression that during the failed attempt earlier, I was thinking that there were files invoke already into the phone in the middle of the process and might cause something haywire.

          2. Kapil says:

            You need to boot into bootloader mode again. Odin recognizes it one per boot. So, remove battery and boot into bootloader mode again.

          3. Bong Escio says:


            Thanks mate. Works fine now.

            More power to you and ChainFire. Keep up the good work.

          4. Kapil says:

            Cool 🙂

          5. Bong Escio says:

            Hi Kapil, its detected now. I reinstalled the USB drivers downloaded in this post. Previously it was detected as COM 21 not it is detected as COM 11. I will start again. 

            thanks for the early response.

          6. Bong Escio says:

            Hi Kapil, Sorry need to ask you again. I still encounter the problem. Im stuck in SetupConnection .. in the ODIN Status window. any idea?

  22. Qubec26 says: Reply

    You are great man! This tutorial help me a lot. I had no idea how to do that.

    1. Kapil says: Reply

      Glad for you 🙂

  23. Qrio says: Reply

    Is this for the Galaxy S and the Galaxy S II ? Start of the text mentions Galaxy S but step 12 it says Galaxy S II.

    1. Kapil says: Reply


      This is only for Galaxy S running XXJVS firmware. For S2, there are other root methods we’ve covered. Which phone do you have and what’s the build number?

      1. Salahzantout says: Reply

        he meant about the logo that u said… about s2,

        and thank for the great tutorials … keep it up

        1. Kapil says: Reply

          Oh ok… 🙂

  24. Lul says: Reply

    Does this work on a official 2.3.5 NEJVK also?

  25. Callum says: Reply

    is there a way of rooting it without a computer? for some reason, now ive installed jvs i cant boot into download :/

    ive got a jig that i can use but this is strange..

    1. Kapil says: Reply

      Download the kernel’s zip file from root guide on your mobile, extract it using Astro file manager, then download mobile odin from android market and flash the extracted .tar file of kernel using mobile odin to root.

      1. Lingnoy says: Reply

        You have to be rooted to use this app!!!n

  26. Guru says: Reply

    My mobile got stuck during booting. It stops at the colorful lines. It doesnt move after that.

    Please help

    1. Guru says: Reply

      Sorry wrong place to paste.

  27. Jeremy Regehr says: Reply

    So I successfully performed this upgrade from a Bell 2.2 Vibrant and it all worked fine. However, it appears that this radio doesn’t support the Bell frequencies in Canada. I have no voice or data at all. I understand I need a modem selection from the Captivate to work on Bell frequencies. I have that file in .zip format for CWM. More unfortunate is the fact that no matter what I try to flash in CWM all I get is a (Status 7) error in CWM. Why does this method break CWM so I cannot flash any file? I’ve tried multiple versions of Cyanogenmod roms and this modem and they all error the same (Status 7) error. Kies does not detect this as an upgradable phone anymore and I know of no way of going back to the old 2.2.

  28. elija_new says: Reply

    I flashed the 2.3.5 Gigerbread firmware on my galaxy s. Now I cant use the internet. u00a0So I cant root my phone,because i have to dowload CWM recovery and I cant use the internet. please help. sorry because of the bad language

  29. maxprkr says: Reply

    That’t for Galaxy S, 
    please correct the:
    “12.  After the CF Root is installed, phone will restart automatically. When the Galaxy S II  logo shows up on phone, you can disconnect the cable from phone. “

    1. Shivam says: Reply

      Post corrected.. thanks for pointing out 🙂

  30. Ademaktas says: Reply

    HELLO ,

    Im a new user in this site.I interested in updating my galaxy s to CM 9.But I could not flash roots.Its trying to change about ten minutes but I vent seen ant massage on screen.I want to if it takes how many time? and is there another way to root if I cant succe this?

  31. Epostolache says: Reply

    Hi! Please help me Kapil. My galaxy s got stuck at  SetupConnection.. in odin. What do i have to do? Please help me Kapil. I feel like i am going to die

    1. muusi1 says: Reply

      I have the same problem and i need help quick!

  32. Momo says: Reply

    Hi Kapil, just wonderin.. if my phone is rooted via the SuperOneClick method, do i still need to root using this method once XXJVS is flashed ?

    Thanks in advance.

    1. Kapil says: Reply

      You can use the above to install clockworkmod recovery. If root is what you only needed, then the above won’t help you, you’re already good.

      1. Momo says: Reply

        Hi Kapil,

        Another quick question.
        I used OneClickLagFix, which i think created a ext2 partition,
        is it alright if i still proceeded with the guide above ? or should i remove the partition first ?

        sorry, kinda lost here a little.


        1. Kapil says: Reply

          Yes, you are good to go, that shouldn’t be a problem.

  33. Hi Kapil,

    im on Galaxy S GT-I9000 running official 2.3.5 NEJVK from Three network UK.

    *#1234# reveals:

    PDA: I9000NEJVK


    Will this rooting method work on my device?

    If no, can you recommend an root method using CF Root Kernel from Chainfire!

    One last thing, (if i can ask) can i install 2.3.6 without rooting?

    Thanks in advance

    1. Kapil says: Reply

      You can install Android 2.3.6 without rooting. Only if you want to install Android 4.0 Ice Cream Sandwich, you would need Root and Clockworkmod (CWM) Recovery installed.

      Use this guide to install Android 2.3.6 – Use this guide to install Android 4.0 –

      Also, I couldn’t find a root method/tool specific to NEJVK build your Galaxy S has, so install the Android 2.3.6 as linked above, and root it if you want, although it’s not necessary.

      1. Thank for you help Kapil. Will install 2.3.6 and give you feedback later

        1. Kapil says: Reply


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