Install Official XWLSJ Android 4.1.2 Firmware on Galaxy S2 I9100

I9100XWLSJ Android 4.1.2 Jelly Bean firmware is available for a download for Galaxy S2 I9100 users in Nordic countries. The firmware update is available OTA as well as via Kies Software. If you have missed the updates, go through the detailed step by step tutorial below to install firmware manually. The latest firmware has some bugs fixes and improvements. XWLSJ Android 4.1.2 is an official firmware update by Samsung, your device will lose root. You can always root your device later to install Custom ROMs. Odin will be used to flash the firmware on Galaxy S 2 I9100.

Firmware Details:

Version: 4.1.2
Date: 2013 March

The guide mentioned below is only for Galaxy S 2 I9100 and is not compatible with any other device. To know the model number of your device go to Settings >> About Phone.

Galaxy S 2

Install official XWLSJ Android 4.1.2 firmware on Galaxy S2 I9100

Take a complete backup of data,apps and settings as the procedure may wipe your data.

Make sure that the battery of device has a minimum charge of 60%.

Enable “USB debugging” on your device by going to Settings >> Developer options >> Enable USB debugging.

Download Kies Software to install drivers.

Download XWLSJ Android 4.1.2 firmware ( update on Galaxy S2 I9100 and Odin (

Extract the Firmware file which you have downloaded in above step. You will get “.tar” file along with other files.

Extract Odin to get “Odin3 v3.07.exe” file.

Switch off device.

Boot device into download mode. Press and hold Volume Down, Home, Power till device turns on and then press Volume Up to enter download mode.

Connect device to computer using USB cable. Odin will detect your device and ID:COM will turn yellow and a message appears saying “Added”. Re-install drivers if Odin fails to detect device.

Click on “PDA button” in Odin and navigate to select “.tar″ file which you have downloaded.

In Odin make sure that “Auto Reboot” and “F.Reset Time” are selected and “Re-Partition” check box is unchecked.

Click on Start button in Odin to start flashing Android 4.1.2 firmware. When flashing is complete you will get a PASS message.

Disconnect device from your computer and let it boot automatically.

XWLSJ Android 4.1.2 firmware on Galaxy S2 I9100 is now installed. You can check firmware version by going to Settings >> About Phone.

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