How to update Samsung Galaxy S2 i9100 to Official Android 4.1.2 Jelly Bean XWLSJ

Galaxy S2 Update 4.1.2

I am sure that you all remember that the last time when we looked into the methods on how to update the Samsung Galaxy S2 I9100 to stock Android 4.1.2 firmware, the applicable method was XWLSD OS which was then released.But things have moved on from then and Samsung did come up with a new ROM for the Galaxy S2, one assigned to make sure it gets rid of the reported bugs from the XWLSD system. Being fed by these details we have come up with this guidelines today teaching you how to manually update your Galaxy S2 to official Jelly Bean 4.1.2 XWLSJ OS. And all you need to do is just check out the steps one at a time as we have also provided accurate details on them, so if you are into this topic then just go ahead and read this article all the way true.

First of all, let’s shed some light on the XWLSJ firmware and what it is? In a nutshell – it is the latest official Jelly Bean update launched by Samsung for the Galaxy S2 GT I9100 handsets, which basically implies that the ROM can also be OTA or by USING KIES received and installed on your phone. But don’t get anxious thinking that you did not yet get a grasp on this software up to this very instant, because the upgrade was actually released in limited markets only, so that should explain it. Moreover, if it happens that the XWLSJ OS isn’t OTA available for you, you will need to do a workaround and to manually flash the Android 4.1.2 system on your Samsung Galaxy S2. But we come to your aid for this, so just check out our guidelines.

I don’t believe we need to mention that this is definitely not the only official Jelly Bean firmware that has been sported out for the S2, therefore if you are really interested to rake a look at the rest of the OS improvements then you should just check out the some other articles on the matter; also, and find out more proper tutorials that can be applied by those who are looking forward in installing a custom ROM, so take your time and see what is right for you. But – leaving all of these aside – I will reiterate that this is the latest Jelly Bean OS and this should also translate into a warranty for being the best and most stable variant of the Jelly Bean platform up to this stage. When it comes to all the bugs and reported issues, they are no longer a worry and they have been taken care of, along with coming up with a few new minor features and apps that have been added along the line. So just decide if you want to updated your Galaxy S2 device  with an improved version of the Android 4.1.2 ROM. I am sure it’s not going to take you too long to come up with an answer.

So if you have decided that you want to go ahead and to update your Galaxy S2 by following the steps provided by us,  then all you need to do is read all the article and make sure you meet all the criteria there is. You will need to take a look and check and apply the necessary pre-requisites and once you have finalized this you can simply begin the flashing procedure under safe terms. There is absolutely need to concerned though because this is an official firmware, so you can easily implement this installation process.

So this actually brings me to the idea that you should know that you don’t have to root your S2 before starting this guidelines. On the other hand too – we have to also add that if somehow you have a rooted device, the root access will be revoked should you decide to apply the steps provided, so make sure you get this right. But there is a good side to this story too and it means that the warranty will be restored therefore and you will be able to enjoy the default Jelly Bean system. What happens if you do want to apply a reroot your phone though? Well then you need to make sure you make use of a guide applicable for the new Jelly Bean 4.1.2 XWLSJ OS, otherwise you subject your handset to the inevitable risk of getting bricked along the way and I am sure you don’t want that.

OK – now let’s start looking into it a little more in detail. When it comes to the  flashing operation Odin is key to make use of, so just relax as you do not need a custom recovery image. In the scenario that your Galaxy S2 is being installed with such a tool then take our advice for granted – as it is recommended (but up to you at the very same time) to use the recovery for applying a wipe (you need to boot into recovery image and then just select “wipe data factory reset” and “wipe cache partition) before using Odin for applying the Jelly Bean 4.1.2 update. That takes me to another aspect we should touch – and that is that you should remember to do a backup before you further proceed with the actual steps. So you basically need to just make sure you save anything you need, and I am adding to this category contacts, messages, call logs, market apps, but also the internet setting and EFS folder.

So let’s see what exactly there is we need to have somewhere handy in advance, but I am sure you are already updated to this by now: we need a Windows running computer with internet access enabled, then also both your phone and its USB cord, and that is pretty much it for now. In order to make sure we stay away from unwanted scenarios, we need to focus on the following to, so just make sure you: uninstall all the security tools that are being running on your computer and smartphone (this needs to be done because these programs are usually interfering with the update process); then also make sure you do charge the battery of your device (you should have at least 70% power left) this needs to be done to make sure that your phone does not suddenly turn off in the middle of our work; some other aspects are to simply enable the USB debugging option on your phone (you can do this by following this simple procedure here: “Settings -> Applications -> Development -> USB debugging”) and this will help to connect the same with the computer.

The last thing on my list before you get going is that this guidelines is solely addressed to those of you who have the Samsung Galaxy S2 model number GT I9100 and for you only, there is no debate. So do not even attempt to apply the provided instructions on another type of Android based smartphone, because you will inherently subject yourself to the very risk of bricking your device.

Steps on How to Update Galaxy S2 GT I9100 to Official Jelly Bean 4.1.2 XWLSJ OS

  1. Make sure you download Samsung KIES on your computer and then also install the drivers for the Galaxy S2; If the drivers are already installed, then you should just get to the next step and skip this first one.
  2. The second step is to Download and install Odin; again – if you do have Odin running on your computer already, just get straight to the next step and skip this one.
  3. Go here to do a download of the update file and then extract it on the computer.
  4. You need to open Odin on your computer.
  5. It is now when you need to boot your phone into download mode and in order to do so you have to initially turn it off and then just reboot (you can do so by pressing on the Power and Volume Up buttons at the same time).
  6. You have to now connect your device with the computer by using the USB cord.
  7. Now let’s get back to Odin and check something out; you are looking to see if the ID:COM is yellow or blue and the “added” message is being displayed. If all these boxes are ticked, then it means that everything is going according to the plan.
  8. Should this not be the case – then you need to take another approach and start by closing Odin, then disconnecting the phone from the PC, reinstalling the drivers on the computer and doing this whole process right from the beginning.
  9. Go to Odin and just select the option named “PDA”.
  10. Then pick the update file which was downloaded and extracted before.
  11. Now just Click on “Start”.
  12. As soon as the installation procedure is completed, the “pass” message should now get displayed on Odin.
  13. As a last step – do note that you can unplug the USB cable and then just reboot your smartphone, because the process is done.

Now what happens if not all goes according to plan – and you get a boot loop instead of the desired result? Then you will have to go back and apply a reboot on your device. You can do this by simply pressing on the Volume Down and Power buttons simultaneously and that will lead into entering into recovery mode; Once you are done with this, you need to select “wipe data factory reset” and then the “wipe cache partition. When you are finished with these, you shall have to go back to  the main menu where you can choose “reboot system now”.

There is also the possibility that Odin gets stuck, so if this happens then you will have to just close Odin, then remove the USB cord, force restart your device, re-install the drivers on the computer and then start over with the update procedure from the very beginning. But we are hoping that no problems of this kind should occur however while trying to apply the Jelly Bean 4.1.2 XWLSJ OS.

And this is finally a wrap now and I think congratulations are quite in order for your having managed to successfully having updated your Samsung Galaxy S2 to official Jelly Bean 4.1.2 XWLSJ software. You should spare no time and go straight to testing the new firmware to see what improvements there are in its performance. I hope you have enjoyed this and we are looking forward to your feedback on the matter, just drop by a comment and we will look into it as soon as possible. Good luck with it!