How To Install ICS (4.0) on Samsung Galaxy S 2

Required :

• Download ICS ROM Here

Step By Step Instalations :
Step 1: Copy ICS ROM to internal ROM/ sd card.
Step 2: Reboot Galaxy S2 in Recovery mode. Then press the Volume up + Home + Power button to boot into recovery mode.
Step 3: Lets now wipe the existing data.

• partition select the ‘wipe data/factory reset’ option.
• Format the /cache partiton by selecting the ‘wipe /cache’ option.
• Format the /system partition by going into ‘mounts and storage’, and then selecting the ‘format /system’ partition option.

Step 4: Select ‘install zip from SD card’ option, and then navigate to folder where you copied ICS zip.
Step 5: Once done, repeat step, yes its needed.
Step 6: Reboot and enjoy Ice cream