How to Update Galaxy S2 I9100 with Android 4.1.2 DXLSD Jelly Bean Official Firmware

Samsung recently rolled out its latest official Jelly Bean update, Android 4.1.2 DXLSD, for Galaxy S2 I9100. The new official firmware is now available for download through Samsung KIES as well as Over-The-Air (OTA) update in Southeast Asia countries - Indonesia, Malaysia, Philippines, Singapore, Vietnam, and Thailand.

This update reportedly brings a fully improved UI settings for smoother and faster usability even on multitasking activity.

Firmware details
PDA: I9100DXLSD
CSC: I9100OLBLSD
MODEM: I9100DXLS8
Version: Android 4.1.2
Build date: April, 2013
Regions: Indonesia, Malaysia, Philippines, Singapore, Thailand, Vietnam

The Galaxy S2 users who missed the OTA update notification and those who are residing outside the supported countries can manually download and install the same using our step-by-step guide given below.

Pre-requisites
1. Install USB Driver for Samsung Galaxy S2 on the computer.
2. Enable USB Debugging Mode.
3. Make a backup of all your important data before following the guide.
4. The Galaxy S2 should be factory unlocked and not locked to any particular carrier.
5. Ensure the battery of the phone is charged more than 80 per cent.
6. The Android 4.1.2 DXLSD Jelly Bean firmware is compatible only with Samsung Galaxy S2 I9100 and installing this on any incorrect variant will brick the device.

Files Required
1. Android 4.1.2 DXLSD Jelly Bean Firmware (Mirror Link 1, Link 2)
2. Odin 3.07 (Mirror Link)

Steps to Update Galaxy S2 I9100 with Android 4.1.2 DXLSD Jelly Bean Firmware
Step 1: Extract Firmware zip file using WinRAR/7-Zip/WinZip or any other extracting tool, you will get a .tar.md5 file and some other files (optional).
Step 2: Extract Odin zip file and you will get Odin3 v3.07.exe along with few other files.
Step 3: Power off your phone. Wait 5-6 seconds for vibration to confirm complete switch off.
Step 4: Boot the device into Download Mode by pressing and holding Volume Down + Home buttons together and then press the Power button until the device turns on. Now press the Volume Up button to enter Download Mode.
Step 5: Run Odin on the computer as an Administrator.
Step 6: Connect the Galaxy S2 to the computer using USB cable while it is in the Download Mode. Wait until Odin detects the device. When the device is connected successfully, the ID: COM box will turn yellow with the COM port number. Additionally, the successful connected will be indicated by a message saying Added. If Odin fails to detect the device then re-install USB driver.
Step 7: Choose the following files in Odin from extracted I9100DXLSD firmware folder by using respective checkboxes:

• Select the PDA checkbox, and choose the file named .tar or .md5.
• Click the Phone checkbox, and choose the file with 'modem' in its name (ignore if there is no such file)
• Click the CSC checkbox, and select the file with 'csc' in its name (ignore if such file is missing)
• Choose the PIT checkbox, and choose the .pit file. Use only the file obtained during extracting in step 1 above, otherwise ignore it.

Step 8: In Odin, enable Auto Reboot and F. Reset Time checkboxes. Also, ensure the Re-Partition checkbox is chosen only if a .pit file was chosen in the previous step.
Step 9: Verify everything suggested in Step 7 and Step 8 is done correctly. Then hit the START button to begin the flashing process.
Step 10: Once flashing completed, your phone will restart and soon you will see a PASS message with green background in the left-most box at the very top of the Odin. You can now unplug the USB cable to disconnect your device from computer.

Samsung Galaxy S2 I9100 should be now updated with official Android 4.1.2 DXLSD Jelly Bean. Head over to Settings >> About Phone to verify the software version running on the device.

Note: If Galaxy S2 I9100 stuck at booting animation after Step 10 then go to recovery mode (press and hold the Volume Up, Home and Power buttons together) and perform Wipe data/Factory Reset and Wipe Cache Partition task before selecting reboot system now function. In recovery mode use Volume keys to navigate between options and Power key to select the option. Please note, performing wiping task will erase your device internal memory data and not external SD card data.

Click here to know How to Root Galaxy S2 I9100 running on Android 4.1.2 Jelly Bean firmware.