Wednesday, April 3, 2013

Install Android 4.1.2 Update I9100XWLSK for India's Samsung Galaxy S2 I9100

Just a heads-up for Samsung Galaxy S2 owners in India, you official Android 4.1.2 Jelly Bean update finally arrives. Although, it takes much time to wait but this 4.1.2 update now still your update.  The firmware build number  I9100XWLSK and looks like exclusively for India release only so far. Those who ain't touched or modifies their  Galaxy S2 devices can simply grab this update via Kies. Those advance users, who might installed a European firmware build such as i9100XWLSD or I9100XWLSN might need to revert back to India's official firmware build I9100XWLSK 4.1.2 version.

Androidromupdate 4.1.2 Jelly bean update

How to manually Install I9100XWLSK 4.1.2 JB Update for India Samsung Galaxy S2

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!
Step 1: Grab the relevant files for flashing I9100XWLSK
- Odin3_v3.07 Flasher tool Odin3_v3.07 link
- Samsung Galaxy S2 USB driverDownload link

- Original I9100XWLSK  Stock ROM
India  INU_I9100XWLSK link

Note: These stock firmware is compatible for Samsung Galaxy S II with the specification model number  “GT-I9100″ versions only. There's no need to root and install CWM recovery or TWRP  recovery on your Samsung Galaxy S2 when installing official firmware.

Step 2: Prepare things  as follows:
- Use a PC or laptop that runs in Windows OS, with a good and perfectly working USBserial 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’.

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 “I9100XWLSD_I9100XXLS8_I9100ITVLS1_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 along 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 androidupdate 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.


  1. I tried downloading jelly bean official indian update via kies, but it got stucked at 1% when it was doing upgrade and i unplugged it. Now my screen is stucked on firmware upgrade encounter and say to select recovery mode in kies. When i try emergency firmware recovery in kies,it get started but again get stucked on 1% for more then an hour . Any suggestions. Can i flash it manually via odin and is it safe?

  2. There is a troubleshooting guide for that "Kies issue", just visit Samsung's page. You can also use Stock ROM.

  3. flashing via odin is safe...just download d latst firmware & do flashng in odin by makng selection of pda file....ur flashng succeeds wen the yellow box appears...if yellow light appears u can proceed n add d pda file... :-)

  4. Hi, Firmware download link is missing in your article. Could you pls provide the link to download INU_I9100XWLSK firmware.

    Thank you,