Procedure to Upgrade Galaxy S2 GT I9100 firmware with Official Jellybean 4.1.2 Firmware:
- Download the Complete Official Jellybean 4.1.2 Package (Alternate Link) from here to your computer to extract the same. Once extracted, open odin in your computer and turn Off your device so that it can be entered in the download mode.
- Download mode in Galaxy S II GT I9100 can be entered by pressing Volume down Key, Center button, and holding both simultaneously press the Power Button after which a green robot will be shown indicating the Download Mode has been entered.
- Open Odin in your computer. Connect your device to the computer with the help of original USB cable and then you will see that the ID : COM Section will turn Yellow.
Note: If ID : COM section doesn’t turn Yellow, you need to check with two things which are mentioned below,
- Install the USB Drivers in your computer &
- Go to the Path “Settings > Wireless & Network > USB Settings” and ensure that “Samsung KIES” option is ticked before connecting the phone to the computer.
- Now, click on the below mentioned options to select the appropriate files.
PDA – CODE_I9100XXLSJ
Phone – MODEM_I9100XXLS6
CSC – CSC_HOME_OXX_I9100OXXLS1
- Once you have selected all the files, you will need to click on “Start” to start the process of firmware update. It will take around 4 -5 minutes for applying the update and once the update process is over, the device will be rebooted automatically.
- Once the device restarts, the phone will show up the home screen and all you need to do is to just follow the on screen instructions for starting the device. To check on whether the firmware has been successfully updated or not, head over to the path “Settings > About Phone” where the current firmware will be mentioned as Jellybean 4.1.2. Very soon we will be coming out with an article which will help you root the device.
Note: Just in a rare case if the device doesn’t boot up or show the home screen then remove the battery and reinsert the same to boot the device again in the normal mode.
Do let us know in the comments section below just in case if you face any issues as we will be more than happy to help you out. Congratulations, you have now successfully updated your Galaxy S2 GT I9100 device with the latest firmware update of Jellybean 4.1.2.
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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
try clearing the cache from recovery mode and the same will be fixed
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?
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
Hi Neela,
Kindly let us know when i can update the galaxy s2, GT9100 to jelly bean via kies
Regards,
Prashanth. K
Once the update arrives, you can apply the same
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 !!
Wi-Fi is not working in my set just after the OS upgrad to Jelly Bean? Can you please help me out of this.
Wi Fi bug has been fixed.. just try again…
Hey pradeep….aftr updating I m getting a problem….wen evr I opn gallery it says no external sd available….plz help!!!!!
successfully working on 4.1.2 XXLSJ
looking awesome interface no issue
but when connect through kies
its not working
plz help
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.
Hmm…. crash sometimes…..
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..?
Download link not woking!! Please help
kindly check the same now
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
Awesome.. but some bugs in lock
And in keyboard handwriting option also.. thats it
Guyz can you put an article for Samsung Galaxy Ace plus – Jellybean?
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
and now i have 75 GB of space…. 
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!
Hi Pradip,
I have installed it but my device getting hot whenever i am using it.
hi guys thanks its working nice and have got 50gb drobbox no need to buy s3.thanks again
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
follow the corresponding instructions to update the same
dude i downloaded the file but i get only 1 file
I9100Jellybean4.1.2_Samsung
I’ve updated the software on my phone and now my sim does not pick up internet connections with the new software. other sims work, and my sim works in other devices. i think maybe a software conflict? 2ndly, i hate the 3×4 keybord predictive text, and even after installing my facebook texting data, the keyboard is terrible, giving off words i’ve never used before. please help
I’ve also considered going back to ICS, but how?
I’ve updated the software on my phone and now my sim does not pick up internet connections with the new software. other sims work, and my sim works in other devices. i think maybe a software conflict? 2ndly, i hate the 3×4 keybord predictive text, and even after installing my facebook texting data, the keyboard is terrible, giving off words i’ve never used before. please help
Hi Neela,
Thanks for the update bro but I ma still stuck with the same issue. I am not able to stop the home screens speaking back to me. With every page swipe it says, page 1 of 5, page 2 of 5 and so on. Please get me out of this bro. Also the battery runs out very fast. If there is no resolution, can you let me know how to go back to ICS 4.0.4…please.
Sachin K
;”( i didnt get the 50 gb dropbox
updated my I9100 successfully last three days, but when i make a call, it drops after one minute with the error message “Unfortunately, the process com.android.phone has stopped”After that the network goes off, comes up mins later. Am kind of frustrated, need help pls
kindly clear the cache from the recovery mode and issue will be resolved
my phone hangs while playing game like fruit ninja and major mahem…which was handledvvery smoothly by ICS….Battery drains out very fast….
Some bugs are:
1) Cannot join/merge contacts.
2) Doesn’t give the JB Buttery experience.
3) Lags sometimes.
it will be addressed in the coming days!
Great walk-through, it’s been the smoothest one yet! Brilliant ROM, very happy with it. One issue. After installing, I’ve noticed my internal memory has dropped to 4GB, from just under 12GB before? Not too much of an issue as I have a 32GB MicroSD card, but it would be interesting to know if anyone else has experienced this?
thanks for your feedback
wi-fi Issue found…I have MTNL wi-fi connection, device connected but unable to use internet. Pls give solution
Does anyone know how after the update to turn on silent mode when the phone is turned over onto its face? Im also finding the lock screen a bit buggy as it sometimes freezes.
this feature is not yet there!
lock screen a bit buggy as it sometimes freezes – for me same.
I think its not turn into silent mode.. it will only pause/silent music player/ringtones.. you need to turn on the motion in the setting.. “Turn over to mute/pause”
is this update for factory unlock galaxys2 i9100 only…plz reply
yes its for factory unlocked device
Hey Neal. Tanx a milli. this room is fantastic. extremely snappy, very pleasant to see, has lots of customizations as opposed to the lay official version of ics. the landscape mode it’s fantastic and the new TW is really cool.
Will this update work for I9100G version
its only for I9100
Hi Everyone, I really need to get this problem sorted, please someone help me in getting the voice payback off whenever I switch between screen or open or close any folders.For the time being I have turned off the media volume (Music and Video) so that it stops saying everything I do on the home screen, but I need a permanent resolution.
Happy Thanksgiving
Sachin
Hi, now i am using Android 4.0.3 XXLPQ,so can i update this firmware version?
yes you can very well apply this update
Dear Pradeep, after installing this jelly bean rom can i downgrade to 4.0.3 in future? if yes please then let me know the downgrade process kindly if possible. please reply, Thank you very much. regards
you can downgrade to any version!
Hi Pradeep, I have been using this update since yesterday but today suddenly my phone started acting strange. Whenever I swipe the screen or open any folder the voice command gets activated. I tried every possible things but unfortunately no success. Please help its very annoying.
Regards,
Sachin K
Upgraded ok works very well. Only 2 issues encountered are unable to add email account with Exchange server setting using SSL. Also Lync not working either. Is this a simple config issues related to SSL or certificates?
there are no issues reported as in SSL Certificates
After applying it my sdcard changed to sdcard0 please help
Please check the link.
I have not been able to download the package.
Thx.
download links are perfect!
The upgrade sounds simple, I am on build ‘Gingerbread.XWKL1′, Is it okay to upgrade to 4.1.2 directly or do I have to apply the previous builds first.
Great. I read this article downloaded the ROM. Works a treat. Got 50GB Dropbox space which is great. Love it all the way
Hi, I applied this and I am loving it, especially the 50GB dropbox space! I have one query though : If this takes away root access, why can’t I use Samsung Kies with my device? Is there anyway I can?
since its not yet rolled out over the globe, its not detected in KIES
Its working perfectly on my galaxy s2 gt-i9100. Thanx for the update. Its like im having a brand new phone. Thank you Neil.
thanks for your appreciation
Hi Pradeep…I have just one question….If i install this rom….Can i update my phone via kies…when samsung rolls down the update officially…..???
Very impressed with how easy this was to do . I have lost my”3″ home icon (not a great loss) other than that I am really pleased .
Thank you for your time in putting this out.
I really want to root .. even if it means loosing this update .. any help please
we will come out with the same v soon
can ANYONE pls help me on this…!! don’t know wats wrong with my s2 i9100 (India). everytime i try to appy any of the update, including this one, odin gives me “FAIL” msg. & have tried removing & re-inserting The battery many times. its currently running ICS 4.03 XXLPQ update. have tried earlier 4.04 updates, but get the same msg always… pls help..
just install the usb drivers
i got battery drain issue and charging problems . Haven’t faced any other problem. also i see “samsung apps” center and “Kies” is missing in the update..
running very smooth……… on gt-i9100
Applied yesterday, its awesome working very smooth. No scrolling problem faced. Thanks Pradeep
as addition, odin does not turn yellow
i am failing to install new rom. my phone gets to green robot and writes: downloading…do not turn off target.
on the computet in odin it says: id:com [o:com 16]
then the process hangs like that for a long time. sometimes it says device could not be connected or nothing. for a long time.
check with the usb port and install the samsung usb drivers from samsung.com
Hello Neela. Pls when will you b coming up with the root tutorial for this SGS2 Rom? That’s the only thing holding me back from flashing it, cause without root I won’t b able to get my contacts, messages and apps back like it was before. Pls reply. Thanks.
how to root galaxy s II after updating this official rom….plz suggest
Could someone please do me a favor and check if Arabic is available in the settings?
no arabic bro
hi, i just update firmware good…. no bugs… what is use of CHECKSUM.md5 file?
and my sg2 USB storage shown tOTAL SPACE 4.11GB only, please solve this problem!
Hi neal..everythng fine bt gt little problem wit screen orientation…
Hi Pradeep, can i use the instructions above for my rooted phone…im currently on Resurrection Remix JB 4.1.2
Hey Pradeep i wanna make sure before i update my galaxy s2 , dose it suport arabic language? and do i have to root my galaxy so it will be apply ? You would do me a favor if you answer me !! thanks!
Hi Neela, is this version a total wipe version? in other words would wipe all user data on the phone when applying the update?
thanks
battery drains super fast
get it and it’s very nice , but it did not support BLN CONTROL ,, how to enable bln ?
Can i just back up my contact and sms with kies only? Please advice. Thanks!
morning Neal, pls when it’s the root for this jb fw coming out? I’m so concerned cause I won’t b able to use my restore apps for my apps, connects and messages. pls reply soon.
how to get odin please provide me link
Yesterday I posted a comment which was not published. I have the same question. Is this Jelly bean update working in India, if not, when is it expected to come out. Please reply, I am getting tempted to root the phone for a custom Jelly Bean ROM but I want to wait for the official update if it is near. I also tried downloading the Jellybean.rar file from this post, but it is not able to download it as too many downloads are done for this file.
Please advice.
Thanks,
Sachin K
my phone got hard bricked. any suggestions to unbrick it?
ARE YOU ABLE TO GET INTO THE RECOVERY MODE?
All my apps need to be reinstalled
other than that works great 
How can we revert back to the last working version incase of any issues with this update?
Hi Pradeep,
I hope this is an offical update, normally offical version is rolled out via kies but here you suggested to do it via ODIN.
Just like to confirm once again, i need not root the phone right??
I was offered the 50GB, but was not credited. Is there a specific way to claim the offer?
FYI, i clicked “I already have a dropbox account” sighs
Open the Allshare play app and you get 50gb for 24months.
Hi. Just letting people know this did not work for me in Aus. I have a feeling the 50 GB is not available for all…
Since my question in the “Facebook Comments” section remains unanswered here I repeat the same:
In your previous guides for leaked official updates via odin, always the last step after updating was to restart into in recovery mode for “Wipe data/factory reset” followed by “Wipe Cache partition”. Here you have not included those. Are they necessary still or not?
HI Neela, could u plz let me know if we can root this firmware as i would need to use titanium backup for restore all my apps and games.. thanks..
Is there an you’re for GSII on America sprint network realize different names but same phone right? Epic 4g touch aggravating.. Phone works bad now aft ICS update praying this w make it will better
.any info as tp when it will be avail. For GSII epic 4g touch….. Blah blah Sprints version thnx mike
Will this work for Sprint GSII?
I have applied the firmware and now my sim network is locked..what to do now??
No room to download cause everyone is downloading!
After updating bluetooth is not working at all. Any reason?
Hey Pradeep does this rom contain any bugs…? If so can u list them..Thanks in advance…:)
After this update, would I be able to receive normal updates through KIES, when released by Samsung?
If i apply this firmware in the mentioned process, will it erase my data or cause the loss of any data?
I have got a question, if i apply this firmware into my galaxy SII in the mentioned process will it erase all my data or loss of files of any sort?
yes it will erase the data
Hieee Pradeep….i m currently unable to update bcz while updating it has stopped in FACTORYFS its not going further than that
can someone else confirm the dropbox space? is it for sure? or just a hit and miss!
it is a sure 50 GB
Not so sure. Updated via Odin here in Aus and no 50 GB extra Dropbox. Same on 2 seperate phones. Downloaded DropBox app. No email, no 50 GB. Nothing in the setup wizard. Wonder if it is region specific?
Will it still be rooted after flashing ?
After flashing, will it still be rooted ?
Installed, it’s brilliant, not yet fully tested but it seems working much better than previous 4.0.3. And also received to my already 2gb dropbox account next 48gigs. For those who wonder how, just sign in with your actual account into dropbox on your device first Wizard screen and CLAIM your space by answering an email you’re about to receive
updated my I9100 successfully yesterday, but when i make a call, it drops after one minute with the error message “Unfortunately, the process com.android.phone has stopped”
After that the network goes off, comes up mins later. Am kind of frustrated, need help pls
MY PHONE IS NOT ROOTED
hey pradeep…!! don’t know wats wrong with my s2 i9100 (India). everytime i try to appy any of the update, including this one, odin gives me “FAIL” msg. its currently running ICS 4.03 official update. have tried earlier 4.04 updates, but get the same msg always… pls help..
When is this update going to happen via Kies in India..any idea???
please give me a resumable download link
Hello im based in South Africa will this update work for me?
Hello im based in south africa can i use the update?
Mr. Pradeep, I am still on XXLQ5 without problems except the wiping of serial number as it was turned to zeros.
I am interested in this one but my question is: is it safe in replacing XXLQ5 directly? please answer
YES ITS 100% SAFE
This rom has a HUGE battery drain issue. After updating, my phone won’t even stand half a day now…
Yes you are right buddy, on wifi it just take 2 hours to drain
im on s2 by the way
works like a charm…but what about my old apps?
have to install them again?
Hi, Thanks for this, I applied the leaked version, which was made available few days ago, is the current one any different from the leaked version?. Also it works amazingly fine, but I could not see the task manager which is usually native app to manage the memory. Also, is there any demo on how to use new features? tks
Hi Pradeep, Its nice but I got a Sim Lock problem when I updated my phone, is there any cure for this?
yes you can apply this update! there is no resolution for sim lock, you will need to get it unlocked
i want to know why i can’t find any advice for samsung galaxy s advane i9070 .i want to update systemr to jellybean.
please feed me back with my email.
thanks
we will surely come up with the same! thanks for spreading the light on the same
I have gs2 my software version is 4.0.3 ics and my baseband os i9100xxlpx. Non rooted till now. Want to ask as per ur instructions i can do this update directly witout rooting.
Thanks and regards
Juzer
Guys I need a good custom rom rooted Gingerbread 236 for my I9100
I can’t update to Jellybean yet. Anyone knows where I can find this rom?
whats the error you are getting?
Not that this jelly bean of any lesser quality or functionality, but 2.3.6 is the very best for SII, as far as I have under stood. Ana C Costa, has a point
Dr. K. A. Rasheed
This complete new firmware not a custom build regardless on what build u r use currently either XXLPS or any.for GTI9100 international only.
This complete new firmware not a custom build regardless on what build u r use currently either XXLPS or any. But for GTI9100 international only.
you can apply with this firmware
Hello. Neela.
My Phone is;
SGS2 GT-I9100 (ICS 4.0.3 idnt want 4.0.4 and not rooted)
its Line when it was in UK and been unlock a year ago.
Others Phone is been LOCK by network .Do you know y? (PLEASE answer)
cou’z it may happen to me bcouz my phone is been line a year ago.
ihope youll answer me Thankyouu
amm. BTW im here in Philippines NOW. PLease answer . Thankyouu
get it unlocked fully and then apply this update
Can you please tell me how ?
Thanks for your answer 
Yieeepiieeee!!!!
If i install this Firmware, it void my warranty or not ?
warranty will not get void
Hi pradeep, I have applied this rom today, and it looks awesome, but the main problem I faced is that when I update my phone to this rom, I face the problem of sim lock, so I had to revert back to ICS and then root and unlock my phone, and tried the update again and same problem, is there any solution to this?
you need to apply on the unlocked device
i got same problem…it ask network unlock code…tell me how u unlock your phone with ics
its only for the unlocked devices!!!
Brilliant Rom,the apps open with astonishing speed!!,what is the ext4 pit file for?
Hello Neela. hope Ur ok. Tanx for always. pls can this firmware b flashed using mobile Odin pro? Pls reply soon. cheers.
its not recommended to use Mobile Odin
Does it support arabic?
going to install now to check if it support arabic or not ,, will update u once i’m done
I have rooted my device successfully using Mobile ODIN..
Works great no prbs. But missing lots of features im used 2. Such as hold backkey to kill app, brightness control on notification bar. Im hoping for the root guide, cause it will take a while to get it as I want. It does have some cool features though, better keyboard similar to swiftkey, read contacts aloud on receiving sms, call
I just found a very annoying feature/issue. When im scrolling up/down in browser it suddenly starts to zoom into page. Did anyone else encounter this. Is there an option to stop it?
there are no reportings as of now
Hi Pradeep, I have been using this update since yesterday but today suddenly my phone started acting strange. Whenever I swipe the screen or open any folder the voice command gets activated. I tried every possible things but unfortunately no success. Please help its very annoying.
Regards,
Sachin K
seems like i am having some issues here, i have ICS 4.0.3 build nos IML74kk.xxlpq downloaded to my s2. the green robot comes when i press volume up key, instead of volume down key. when i connect the phone and starts the ODIN it dosent change the color to yellow. I am not able to find the samsung kies in the wifi settings probably it being a ICS and may be it is located somewhere else.
Not sure if you can stop it, but it is a feature that it zooms when you scroll on the side edges of the screen. Seems ok.
Think its a feature only does that for me when the scrolling to far right. In the middle is fine. Working like a pc touch pad.
I’m also facing
Are you maybe using the TiltToZoom option (Motion, under settings)?
Use the right screen edge to zoom in and the left to zoom out. Scroll using the middle of the screen. Takes a bit of getting used to.
Ignore this advice. Zooms either side. Battery does not drain fast.
I dont think this as an issue.. its a new feature.. u need to scroll it a little bit on the middle of the screen.. if u scroll it on the left/right of the screen.. it will automaticly zoom in/zoom out..
This is a fantastic ROM. Thanks for the sneak preview. Do you know why ROM manager will only back up to internal sd card, it no longer asks whether i want to back up to the external sd card like it used to. I have remounted the card in recovery but it doesn’t seem to make any difference.
Cheers
Mick
will it be available for the i9100G also??..Thank you for replying.:)
no, its for I9100 only
After I update my samsung galaxy s2 I have some problem with my mobile network data. I can’t connect to my mobile data network…so can you help me plz?
heyy will the samsung galaxy gti9100G receive the jellybean update i mean official plz i need a reply
is it rooted??
its not rooted
I have rooted my device successfully using Mobile ODIN..
Thank you
Applied the update yesterday and have most of the options same as S3…..Its an effective update and working smooth.. I received 50GB space extra in Dropbox….thanks Neel for your effort…..
thanks manoj for your appreciation!
updated successfully,but scrolling is not smooth at all…looks like as it is laging..
plz tell me any setting if i hv to change
thanks for your convenience
Applied yesterday… works smooth.. no problems or bugs yet.
Got 50GB from DropBox with installing it! Would be nice if you guys mention this ,)
thanks for your comment, mentioned the same in the article upon your suggestion!
It works beautifully, easy to install. But I found a small problem, even with the data network mode enabled, I do not get the 3G from the mobile network anymore. However, with the WiFi on it is working. How do I correct this situation.
kindly check with the wifi connection!
Beside 3G, is there any problems?