How to Flash Stock ICS / Custom Kernel using Odin

WARNING!!

IMPORTANT!

-We will not responsible for any damage.
-Do it at your own risk!
-Read carefully, and don't skip any part.
-Make sure the downloaded Firmware / Kernel is only for Samsung Galaxy S II - i9100G!

Instructions

Step 1: Download these file.

• Odin
• Samsung USB Driver
• List of Custom Kernel (Optional)
• List of Firmware  (Stock ICS ONLY!) (Optional)

*please install Samsung USB Driver before proceed.

Step 1: Enable USB Debugging.

• If you are on ICS,  go to Setting > Developer Option > USB Debugging
• If you are on Gingerbread, go to Setting > Development > USB Debugging

Step 2: Entering Download Mode / Odin Mode.

• Turn Off your phone.
• Enter Download mode. (To do so, press and hold the Volume Down + Home + Off / On buttons while powering on the phone. When the screen turns on, let go of all three buttons. You'll see something like below)

• Don't worry about the warning. Now press Volume Up to proceed.
• Congratulations! Now you are in Download Mode/Odin Mode.

• On your PC, open Odin, and then connect your phone to PC via USB cable.

Step 3: Handling Odin

Click picture to Zoom.

• Now, make sure your Odin show up the same thing like picture above. Don't touch other than that!
• Make sure your phone has been successfully detected by Odin (As shown in the yellow box-there is a blue-wish color appeared). If not, please close Samsung Kies that works in background mode. You can check it at system tray/task bar.
• Now, at PDA, locate the Downloaded Kernel/Firmware. 

• After that, click Start, and the process may begin and takes about a few minutes to finish.
• Your phone will reboot, and taking a few minutes to re-constructing its firmware.

Voila!..Its Done.

*If your device went wrong after flashing custom kernel/Rom (in other words = Soft Brick), please follow the instruction given HERE