[Galaxy S II Q&A, Help & Troubleshooting] ScottsDesk:
Try this it worked for me

Try this

Try this step by step and it shoudl work!

Requirements

A Samsung Galaxy S2 GT-I9100

A Windows PC

Your phoneÃ¢Â€Â™s USB cable

7-Zip, WinRAR, or any other programs that can extract archive files

Handset USB drivers installed on the PC. You may install the drivers by installing Samsung Kies.

Enable USB Debugging on your handset.

Disable antivirus, firewall, and other security software. Also disable Samsung Kies and other software that accesses your phone. Such software can interfere with the procedure in this guide.

Download the following files to your computer:

Android 4.0.4 ICS firmware build XXLQ5 (I9100XXLQ5_I9100OXALQ5_OXA.zip, 387.1 MB)

copy and paste

hotfile.com/dl/162208594/226b6f0/I9100XXLQ5_I9100OXALQ5_OXA.zip.html

Odin3 1.85 (Odin 1.85.zip,199 kB)

Make sure your phoneÃ¢Â€Â™s battery is charged up to 75% or more to avoid interruptions during the process.

Backup all personal data on your phone to make sure you have a copy of your personal data (e.g., contacts, SMS, MMS, Internet settings, Wi-Fi passwords, and the like) in case the procedure in this guide erases such data.

For backup tips, check our guides on how to sync your data to the cloud and how to create local backups of your mobile data.

Instructions

Extract the contents of the I9100XXLQ5_I9100OXALQ5_OXA.zip file to get these files:

I9100_CODE_I9100XXLQ5_CL753921_REV02_user_low_ship.tar.md5

GT-I9100-MULTI-CSC-OXALQ5.tar.md5

MODEM_I9100XXLQ5_REV_02_CL1165929.tar.md5

u1_02_20120326_emmc_EXT4_8GB.pit

Extract the contents of the Odin 1.85.zip file to obtain the Odin3 v1.85.exe file.

Double-click on the Odin3 v1.85.exe file to launch Odin on your computer.

Unplug your phone from the computer if it is connected. After unplugging, turn your phone off.

Put your phone into Download Mode. To do this, hold the Volume Down, Home, and Power buttons together until the screen turns on. Press the Volume Up key to put your phone into Download Mode.

Connect your phone to the PC using the USB cable. In Odin, a message saying Ã¢Â€ÂœAdded!!Ã¢Â€Â will appear on the bottom left of the window.

In the Odin window, click on the PDA button and select the I9100_CODE_I9100XXLQ5_CL753921_REV02_user_low_ship.tar.md5file. The file should show on the space beside the PDA button.

Click on the PHONE button and select MODEM_I9100XXLQ5_REV_02_CL1165929.tar.md5 file. The file should show on the space beside the Phone button.

Click on the CSC button and select the GT-I9100-MULTI-CSC-OXALQ5.tar.md5file. The file should show on the space beside the CSC button.

DonÃ¢Â€Â™t alter anything else in Odin. Leave everything else as is, except for adding the files mentioned in steps 7 to 9.

Click on the Start button in Odin to start flashing the firmware to your phone.

After the flashing completes, your phone will automatically reboot. You should be able to get a Ã¢Â€ÂœPASSÃ¢Â€Â message on the top left part of Odin.

NOTE: If you get a FAIL message or Odin gets stuck, disconnect your phone from the PC and close Odin. Remove the battery from your phone, re-insert it, and place your phone into Download Mode again. Open Odin and do the procedure starting from step 6.

Once you see the Samsung logo on your phoneÃ¢Â€Â™s screen, you can safely disconnect your phone from the PC.

Hope this helps!

ScottsDesk