Android 4.0 Update for Samsung Galaxy S II

Samsung Galaxy SII can now updated to Android ICS 4.0 officially from Samsung. Although it now, only available for europe and south korean region, other region will soon follow after this update mechanism approved by carrier (cellular operator).
Other Galaxy devices will also get this update soon enough.
If you are unpatient for this updated, there is a way to update your Samsung Galaxy S II in an unofficial way (the update file is official). This update were provided by a guy from modaco. You can update your phone using Kies and Odin. Remember to make backup of your original ROM in case you want to restored it later. Do this AT YOUR OWN RISK.
Below is the step-by-step walkthrough:

1. Download the latest Samsung Kies and the driver from samsung.
2. Download Odin here.
3. On your Galaxy S II, activate USB debugging via settings->Applications->Development
4. Download the official Firmware 4.0 update here. The update size is about 300 MB, save it and extract it on your computer.
5. Install your latest KIES.
6. Having every ingredient at hand, open Odin and klik the button labeled PDA. Navigate to the folder where the extracted Firmware 4.0 located, scan for a file with md5 extension.
7. Prepare USB cable of your Galaxy S II. Turn it off, then push power button+volume down+home all together (simultaneously), you'll have warning on your screen, to continue or aborting. If you want to go on, push volume up to enter download mode.
8. Connect your Galaxy S II using USB cable and wait until your computer detect or recognize your phone. If this step fail, maybe you should review step 5.
9. On Odin's control panel, push the start button and let the download process finish.

If everything goes ok, now your samsung Galaxy S II will have android 4.0 on it. Enjoy :)