`` Galaxy S2 Official Jellybean 4.1.2 XXLSJ Firmware Update with 50GB Dropbox Space - Android Advices

Galaxy S2 Official Jellybean 4.1.2 XXLSJ Firmware Update with 50GB Dropbox Space

Jellybean 4.1 LogoGood News for Galaxy S2 is finally out and in the due course of this article we will be checking out on how you can actually install the same with a detailed guide. This firmware for Galaxy S2 is dubbed as Jellybean 4.1.2 firmware of which there is still no ETA on by when it will be rolling out officially but it is pegged to roll out very soon. If you are the one who hates to wait then this guide is just for you so that you can manual update with this jellybean 4.1.2 build. Unfortunately, there are still no details on by when Jellybean 4.2 will be out but till then you can enjoy this firmware.

We have summed up express pre requisites and then after that we have summed up a detailed guide on how to apply this firmware update. Please note that for applying this update you need not root your device and also applying this update won’t void the warranty in any manner. Also, just in case if you have already rooted the device then the root access will be revoked, we will soon be coming out with a detailed guide which will help you Root Galaxy S2 on Jellybean XXLSJ 4.1.2. The most awesome part about this firmware is that it’s the Official firmware which got released from Samsung and is dubbed as XXLSJ as the build number and the baseband version as XXLS6. As of now this update is not yet available for Galaxy S2 I9100G smartphone.

Good News: Some users who have updated with this Firmware are reporting that they are getting FREE 50GB Dropbox Space.

Pre Requisites:

Create a backup of all the data with the help of below mentioned steps so as to make sure that just in case if the data gets wiped off or gets corrupted, the same can be restored with the help of below mentioned steps. Don’t create a backup of data with the help of KIES or ROM Manager as you may not be able to restore the data again.

SMS – Use “SMS Backup & Restore app”,
Contacts – Sync with the Gmail application,
Call Log -Call Log and Restore
Images, Songs, Videos, Files – Copy to internal / External SD Card,
APN and MMS Settings – Note down from the path “Applications > Settings > Wireless and Network > Mobile Networks > Access Point Names

Enable the USB Debugging from the path “Settings > Applications > Development > USB debugging” and also you will have to ensure that the minimum battery life should be 30% so as to ensure that the phone doesn’t get turned Off in the middle of update. Disable / uninstall all the security suites installed in your phone.

Disclaimer: Follow all the instructions mentioned in this article as if there is any damage caused due to not following instructions then we shall not be held liable or responsible. Just in case if you face any issues then we will try our level best to address the same.


Let’s head to the next page where we have summed up a detailed article on how to apply this firmware update.


  1. contacts,settings,maps,music player takes 3+ seconds to open after clicking the icons
    games like temple run & subway surfers hangs while playing
    why is this happening ??
    plz reply ASAP
    otherwise nice update

  2. Pradeep,
    I had updated my phone wid this firmware few months back.But since the official update has been released recently for S2 , how do i go back and update my device with the official release?

  3. Hi since the update texting has been hell. I can no longer add words to the dictionary. Also next word prediction is still anoying me. Can you please help with these two problems.
    Many thanks

  4. Hi Neela,

    Kindly let us know when i can update the galaxy s2, GT9100 to jelly bean via kies

    Prashanth. K

  5. Bronislav Radulovic

    I have ICS 4.0.4 on my SGS2 9100. Few days ago, I wanted to make JB update to offical 4.1.2 as described in text. But I have big problem in installing via Odin. Com field doesn’t turn yellow and suggested solving option doesn’t exsist in Settings on my S2. Process fails with hour lasting message Downloading… on phone screen. Please help, because two of my friends also have same problem !!

  6. Wi-Fi is not working in my set just after the OS upgrad to Jelly Bean? Can you please help me out of this.

  7. Hey pradeep….aftr updating I m getting a problem….wen evr I opn gallery it says no external sd available….plz help!!!!!

  8. successfully working on 4.1.2 XXLSJ
    looking awesome interface no issue
    but when connect through kies
    its not working
    plz help

  9. Is there anyone who can help me with this problem which I am facing since the time to updated my phone. Every time I swipe between screens the phone reads it back to me. eg: screen 1 of 5, screen 2 of 5 and so on. I have to off the media volume to avoid hearing it. Please help.

  10. Hmm…. crash sometimes…..

  11. Does anyone facing problems with samsung keyboard? I had a problem to fill a number collumn.. the keyboard will just freeze.. and got error msg “Unfortunately, samsung keyboard has stopped”
    Can sum1 respon to this problems..?

  12. Download link not woking!! Please help

  13. The updates worked perfectly for me…but I did it for a friend and he’s having problem with wifi.plz help me out…Neela

  14. Awesome.. but some bugs in lock
    And in keyboard handwriting option also.. thats it

  15. Guyz can you put an article for Samsung Galaxy Ace plus – Jellybean?

  16. And guyz who are updating firmware, Please create a different dropbox account to get that 50GB space. i signed in using the existing same account with which i already have 25GB for my HTC one X and so lost that 50GB thingy :(

    • eeekkk… just wanted to update all… ignore my above comments. 50 GB added to my account for 24 months :D and now i have 75 GB of space…. ;)

  17. Guyz, Amazing work as usual. keep it up. Works perfectly. Finally into official firmware again after your first upgrade 2.3.4 i guess for my S2 from 2.3.2 :) HTC one X is still stock though. Few hours back, received an update for jelly bean and somehow that’s not this good :) You guyz rock. Cheers!

  18. Hi Pradip,
    I have installed it but my device getting hot whenever i am using it.

  19. hi guys thanks its working nice and have got 50gb drobbox no need to buy s3.thanks again

  20. Hi, I am still facing the issue of screen talking back on every swipe. Also the there is lag and battery drains out very fast..Please help or else let me know how do I go back to ICS

  21. dude i downloaded the file but i get only 1 file

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About Pradeep Neela

Friends call him Droid Geek because he tries out different ROM’s everyday and helps droid users experience better features on their devices. Add +Neal Pradeep on Google Plus for more Updates.
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