I9100XWLSW 4.1.2 Jelly Bean Update on Samsung Galaxy S2 I9100

Here’s comes a new firmware build I9100XWLSW Android 4.1.2 Jelly Bean update for Samsung Galaxy S2 to those who likes getting an updated software version. The I9100XWLSW build is officially release in UK.  The  I910XWLSW is freshly build back to May 2013 and gets the new kernel version change list number to 1211311, much higher from previous releases XWLSS

Here are the firmware info:

Device: Samsung Galaxy S 2
Model number: GT-I9100
Country : United Kingdom
Android version: 4.1.2
Baseband: I9100XWLSW
Kernel version: 3.0.31 – 1211311
Build Number: JZO54K.I9100XWLSW
PDA: I9100XWLSW
CSC: I9100XEULS5
MODEM: I9100XXMS3

There is a bit disadvantage of the XWLSS when we talk about the RAM usage and this is due to the increased number of basic software that runs in a background process. But when it comes to the device usability, I highly recommend this firmware because it brings a much smoother transition in users interface (UI) even during heavy use of multitasking it doesn’t show any issues. Those who might want try or install this I9100XWLSS firmware version, Juts follow the step by step procedure below. The battery life stays the same from previous releases, but it’s too early to tell.

Disclaimer: This guide is for advance users only, if this your first time heard about this method, make a careful research first before proceeding. We shall not be held responsible if anything happens to your device by using this guide. Proceed at your own risk!

How to manually upgrade or install the I9100XWLSW Android 4.1.2 Jelly Bean on Samsung Galaxy S2

Note: This stock firmware is compatible for all Europe unbranded or unlocked Samsung Galaxy S II with the specification model number  “GT-I9100″ versions only.

Step 1: Grab the relevant files for flashing I9100XWLSS
– Odin3_v3.07 Flasher tool Odin3_v3.07 link
– Samsung Galaxy S2 USB driverDownload

Download I9100XWLSW Stock Firmware

United Kingdom – I9100XWLSW_I9100XEULS5.zip download
Italy – I9100XWLSW_I9100ITVLS5.zip download
Greece – I9100XWLSW_I9100EURLS5.zip download

Step 2: Prepare things  as follows:
– Use a PC or laptop that runs in Windows OS, with a good and perfectly working USB serial port.
– Use the USB cable wire for your Galaxy S2.
– Make sure that your galaxy S2 battery is fully charge.
– Back up all important files stored from your phone’s internal memory – contacts, messages, etc.
– Remember or back up the APN settings of your device.
– Enable USB debugging from your phone’s settings. Go to Settings > Applications > Development, and tick the box that says ‘Enable USB Debugging’.
– Do a “Hard Reset” if you have a lot of 3rd party applications installed from your phone, this is useful to gain a smooth flashing. (Just make sure that you already back up all your important files before resetting your device.

Step 3: Extract or unzip the downloaded stock firmware so that you’ll get the Odin flashable .tar.md5 file. Use Winzip, winrar, 7zip or any extracting tool you had in your computer.
Step 4: Run and Configure Odin
Run Odin downloader on your computer’s desktop. Watch out the check-boxes options on the right top of Odin, ensure that the ‘RE-PARTITION’ is unchecked. Leave the ‘AUTO-REBOOT and ‘F.RESET TIME’  remains checked.
Now, click on the PDA button, then select and load the tar file that you have previously extracted. For example I’m using the  Italian firmware so I got the “I9100XWLSW_I9100XEULS5_HOME.tar.md5″

Odin sample:

I9100XXLS8 odin stock install

Step 5: Reboot the Galaxy S2 into Download Mode.
To put your galaxy S2 in download mode, just simply switch it off then gently press and hold the “POWER, VOLUME DOWN and HOME” buttons simultaneously. You’ll be then prompted in a warning screen to continue or cancel.

Samsung Galaxy S2 Download Mode button combination

Step 6: Connect the Phone to the Computer or Laptop
Once the phone screen shows in downloading mode, connect your phone to the PC with the USB cable. You’ll then notice the upper box in Odin that turns in yellow color., it also indicates the COM:ID where the device is being detected and a word “added!!’ on the log box. If somehow those things never showed up, check out the USB cable connection, read again from the top of this post.
Step 7: Flash it!
Once all set and ready, hit he “START” button to begin flashing.
Do not touch anything that might interrupt the process to avoid any fatal errors or failures, it may ruin your device if any interruption occurs while already in flashing status.

It may only takes about 3 to 5 minutes, depends of your PC/laptop speeds. A word “PASS” will display in Odin once it finishes. If somehow you will not get the word “PASS” or just stuck in a long time. Disconnect the phone, remove battery, re-insert it, check the USB connection, re-install the driver, disable Kies and any anti-virus. Set the phone in Download mode again, and repeat the whole procedure.

The phone will just automatically reboots if the firmware flashing successfully completes. Just wait until it boots up on the “S” logo for a while then into an android update screen. If it still shows boot logo try rebooting and if it stays there, you need to wipe your phone.

Fixing possible issues after flashing like bootloops or just stuck in welcome screen logo

Boot in recovery mode – Press and hold Volume Up, Home and Power button. Use volume keys to select up and down and power or home key to select the option.

1. Select Wipe Data/Factory Reset
2. Next select the Wipe Cache Partition
3. Lastly select Reboot System Now to reboot your Galaxy S2 in Normal mode.
Confirm your fresh firmware installed by typing *#1234# or
Go to Settings>About Phone>Firmware info.
Check and reconfigure your APN settings when data networks connection issues encountered.

Change the default text to your own or desired language

The default language of this firmware varies according to which country specific software build you have installed, but it has all major languages around the world included. You can just simply change it from your device Settings>> Language and Text input.

All Included languages:

  • Catala
  • Cestina
  • Dansk
  • Deutsch (Deutschland)
  • Deutsch (Osterreich)
  • Deutsch (Schweiz)
  • Eesti
  • English (Australia)
  • English (New Zealand)
  • English (United Kingdom)
  • English (United States)
  • Espanol (Spania)
  • Espanol (Estados Unidos)
  • Euskara
  • Francais (Belgique)
  • Francais (France)
  • Galego
  • Hrvatski
  • Icelandic
  • Italiano
  • Kazakh
  • Latviesu
  • Lietuviu
  • Macedonian
  • Magyar
  • Nederlands (Belgie)
  • Nederlands (Nederland)
  • Norsk bokmal
  • Polski
  • Portugues (Brasil)
  • Portugues (Portugal)
  • Romana
  • Slovincina
  • Slovescina
  • Srpski
  • Suomi
  • Svenska
  • Turkce
  • Uzbek
  • Russian
  • Chinese
  • Korean
  • Japanese
  • others which I can’t read

That’s it! Your Samsung Galaxy S2 should now runs in Android 4.1.2 Jelly Bean build number I9100XWLSW. If this helps you then simply share us some love by hitting our like and share buttons. If you also have something to add, your comments and suggestions are most welcome here.

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