Download & Install Official Android 4.1.2 Jelly Bean Firmware for Samsung Galaxy S2

Want to try out official Android 4.1.2 Jelly Bean Firmware for Samsung Galaxy S II GT-I9100? Samsung just leaked Android 4.1 Jelly Bean XXLSJ Firmware for those Samsung Galaxy S2 users who love to try out beta ROM. Note – this is a test firmware from Samsung so it might have issues / bugs. Only install it if you know what you are doing. Or just wait for few weeks. You will get the actual official Android 4.1 Jelly Bean Firmware for Samsung Galaxy S2. And enjoy all the Jelly Bean features then…

Official Android 4.1.2 Jelly Bean XXLSJ Firmware for Samsung Galaxy S2

Personally, I did not try this firmware. Feel free to take the risk and try it like others at XDA Forum. The good news – no hard brick issue found yet. And they are enjoying it now…

Installation guide ~ How to install firmware on Samsung Galaxy S2 with Odin? (Video)

Download & Install Official 4.1.2 Jelly Bean XXLSJ Firmware for Samsung Galaxy S2 here.


  1. i have installed it and when switched on, it prompts me to enter the sim unlock code. My s2 is locked ๐Ÿ™ . All functionality works well apart from calling, SMS, Mobile Data.
    Is there something i can do?
    Thanks Duncan Formosa

  2. Hello jayce… Could you pls give a link where i can download the already prepared .tar file cos i don’t know how to go about with the files here..

  3. Hello !!! I am having some issues with this update

    Enter CS for MD5..
    Check MD5.. Do not unplug the cable..
    Please wait..
    MD5 hash value is invalid
    CODE_I9100XXLSJ.tar.md5 is invalid.

    some knows how to fix it…

      • Jayce, AFAIK only changing the counter (not being = 0) “deguarantees”! Even root (if it’s not changing the counter) is ok. Of course the counter can be reset by Triangle Away, so the root will is still be ok. To be 100% sure when you give it back to service – make sure it’s 0 counter and stock ROM, de-rooted. In 99% you won’t even have problems with root and sometimes even with custom ROM (as long counter=0)! I know how strange it sounds, but I’ve talked with a guy working in Samsung service in Poland privately, and he said that most thing voiding the guarantee is the NON-ZERO COUNTER, and some obvious changed things like boot animation – so even the non-stock ROMs are tolerated, in case they are not associated with the hardware problem… Some things are simply not checked and suffice to say, don’t cause any problems ๐Ÿ™‚

        • Just got second hand galaxy s2 and warranty will expire on 1 December. What is bad about non zero counter? Will it be problem for non warranty device?

    • – Buttery Smooth Performance & Great Stability Project Butter
      – New TouchWiz Nature UX..UI like Galaxy S III and Galaxy Note II
      – Samsungโ€™s Cloud services
      – Direct Call, Smart Stay and Pop-up Play Features
      – New Widgets like Galaxy S III
      – 2 Home screen modes
      – New Notifications bar
      – Google Now
      – Drop box

  4. Sir jayce i hope this is going to be true ^^

    “Samsung-Updates says: โ€œExpect official Jelly Bean rollout for Samsung Galaxy S II (international version) upcomming week .โ€

  5. Hi Jayce,

    If I already installed 4.2.1 CM10 to my S2, Can I just install this 4.1.2 without needed to restore to stock firmware?


  6. Hey jayce….

    My frimware version is
    csc-lpc—-i wanted rom for my s2 other than 4.0.4
    Where i get rom for my phone please…my phone is dual booted

  7. Jayce,

    I downloaded 4.1.2 jelly bean for GT-I9100 China Rom (I9100ZCLSF_I9100OZHLSF_CHN) from, MY GT-I9100 handset is from the UK factory unlocked, It currently has ICS 4.0.4 , I tried to Flash The JB rom onto my phone and it failed many times, Can you tell me what I have done wrong? Can I not Flash a China Rom on to a UK handset? or is there another process? I would rather flash a Hong Kong JB rom but HK does not have it yet, I am in Hong Kong now,

    Please can you advise me on what to do



  8. awww that sucks , as s2 doesnt support chinese, no worries i will go back to china in 2 weeks and get someone to flash it for me, but not jelly bean,

  9. hi Jayce,

    i managed to install cwm after instructions from your site.
    i have tried installing lightning rom 2.7 and omega 19.1 JB roms , but neither works.
    is it true that installing a rom of another firmware will brick my fone ?
    i am not able to find many roms for my firmware, which is xwlp7
    Please help.

  10. i have supersu on my fone , and also have cwm on my fone , galaxy s2 g19100.

    I have downloaded 2 roms (firmware) on my sd card , omega 19.1 and lightning rom 2.7.
    both are not installing , it says initialisation failed.
    my kernel is
    3.0.15-I19100xwlp7-cl340913 dpi@dell134#3

    Please suggest the best new firmware(rom ) for me to use .
    I am unable to find

  11. Does it have all the features of official jeally bean (avaible through Kies) ?
    If not then can you tell me any way to get all those features…

    As I think it does not have all official all camera features …


  12. hello Jayce. I need the video wich explains the instalation of Samsung Galaxy S II Android 4.1.2 from the file Samsung Galaxy S II Android 4.1.2 Jelly Bean [XXLSJ].rar
    i need the password of the recent file and the other steps.
    plz answer me.

  13. Why are all downloads unsuccessful,in browser and in play store even after clearing cache and rebooting device.Any Solutions?

  14. hi jayce
    i am on ics on my sgs2 which i updated ota. but now many of my friends here in india having sgs2 have got updated via kies my kies says no update available, and my ota say no update available yet. what is the problem

    2. i downloaded official jb firmware from sammobile if i install this rom by using ur method shown in the intall official rom via odin videoon ur website will it wipe out my data on the internal storage…or is it better to factory reset my phone and then update via odin

  15. dear jayce

    want to flash with new jb ….but first want to store my original fw and kernel for later restoration if needed….is it possible , if so how ???

    second the link you gave for siyah kernel describes a lot about it but where is the download link ??? I could not find it ….please guide.

  16. thanks jayce.

    can I install CWM also via this siyah kernel…as I don’t find a matching cf root otherwise…

    second the link you gave for siyah kernel describes all for S2 as beta version…still can I download any one of them and would they be safe…


  17. my s2 is from orange uk

    and when i upgraded it to ics….it gave kernel description as follows..

    3.0.15-1187368 dpi@DELL228# SMP PREEMPT wed dec 26 23:34 :12 KST 2012.

    obviously this is jargon and probably mentions the date and time when i upgraded it….but where is that kernel , those alphabets which i can try to match with cf root
    how ever in baseband and build version…..bvlpj … written which may sound something less stranger to you…

    So that s the reason I may have to use siyah but then can I do CWM with that and if not what is my alternative. ??

  18. hi jayce

    I have downloaded siyah kernel for s2 v 5.0.1….not the ver 6 one as it was beta…is that okay ?

    second how to extract file …is it with 7 zip ? bec winrar give only zimage….???

  19. oh perhaps this is already tar file which does not need further extraction and i can straight away put it in pda………….ok ???????? i have odin version 3.7….does it make any difference ?

    one more thing jayce… said new kernel can also be flashed through cwm but unless one roots or flashes with custom kernel , one does not have cwm….so how can it happen ?

  20. hi jayce

    got my self into a little trouble….flashed jb successfully on my sgs2….but its not reading my sim now….asking for pin code which unfortunately I don’t have and cannot arrange….that sim is working on every other mobile except this one….can I do any thing to make it working.

    I have tried hard reset too but to no point………….please advise

  21. hi jayce

    in trying to root it again….with siyah kernel …i perhaps rooted it wrong way in haste… this is simply not booting….only logo comes and then fish sign and then every thing darkens again….have i bricked my phone, or can i still bring it to life ?
    please suggest.

  22. yes it does in a while….like I have seen CWM loading….I don’t know whether it would work or not..because it will depend if i had rooted it well ???? any ways its not charging properly….it quickly dies down….I hope i can also put it in odin mode after some effort..

  23. hi jayce..

    got tar archive file….but when decompress it with winrar or 7 zip..there is only zimage to decompress…..what to do ?

  24. jayce it seems siyah kernel 5.2 is not compatible with jelly bean….every time i flash gets stuck at that fish sign and doesn’t boot. any suggestions.

  25. dear jayce

    thanks for guiding…but then how to root jelly bean ?????

    second can I still try cyanogen and kitchen rom type stuff in presence of JB….I mean do they still have their attraction ?

  26. kindly give link to the latest version…….as far as i know he is giving latest for only sgs3….

    can i use that for sgs2 too ????

  27. hi jayce

    one problem with s2…it allows messages only for 3 pages and then converts it into mms…any way to avoid this.. sometimes messages are bigger but it wont let you write them…so what can we do….any change in settings might fix it ?

    I am not happy with big sms type apps..

  28. hi jayce
    iam in Tanzania, i have samsung s2 4g lte shv-e110s (korean version) using gingerbread and I want to upgrade to jelly bean 4.2.2. can you give me a link to download the file? other than or please help

  29. hey bro h r u? i have a galaxy s2 n framword is installed 4.1.2….
    n i want to downgrade to 4.0.
    i install the framwork 4.0 but after install its stuk on starup…….
    plz help me out ( what i do?

  30. My mobile is taking too much exposure time resulting in blur pictures. I have repleced the camera twice but same issue. In start it used to take pictures with average 1/1000 exposure time but now it takes pictures at an average of 1/20 exposure time. I am using jeally bean but i have tried to revert back to gingerbrid but same issue .

    Can you suggest me any app or any solution to it . Thanks

  31. Hi jayce

    Could u have help me…
    I have problem with unknwon base band & null imei/meid… Gt i9100 on jb 4.1.2

    The other problem i dont have backup my efs…
    I much hope u can help solve this problem… Thanks

  32. have samsung s2 4g lte shv-e110s (korean version) using gingerbread and I want to upgrade to jelly bean 4.1.1 or other jellebean versions can you give me a link to download the file? other than or please help

  33. am in India, i have samsung s2 4g lte shv-e110s (korean version) using gingerbread and I want to upgrade to jelly bean 4.2.2. can you give me a link to download the file? other than or please help only from sd card because i am unable to connect pc through usb, it shows usb malfunctioned error pls give solution as soon as early


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