[Guide] Samsung Galaxy S2 ICS

For those of you who are like me - too impatient to wait for Samsung Singapore to release ICS update for i9100 Galaxy S2, can follow the following steps to flash to ICS (and in addition, flash to CM9).

Ice Cream Sandwich 

Android I9100XWLP7 4.0.3 (United Kingdom / Ireland)

1. Download ICS firmware
http://www.hotfile.com/dl/153177481/9861a3a/I9100XWLP7_I9100XEULP5_XEU.zip.html

2. Boot into Download Mode

1. Turn off phone.
2. Vol Down + Home + Power

3. Odin Flash Guide
http://forum.xda-developers.com/showthread.php?t=1075278
http://forum.xda-developers.com/showthread.php?t=1406664

ICS is cool, but... the official ROM is still laggy. So I decided to take further steps to mod it to CyanogenMod.
So if you are like me, want a smooth UX, follow the following optional steps :)

Root

3. CF-root by Chainfire.
http://forum.xda-developers.com/showthread.php?t=1103399

4. Remove Yellow Triangle during startup, using TriangleAway from Chainfire.
http://forum.xda-developers.com/showthread.php?t=1494114&highlight=remove+yellow+triangle


CyanogenMod

CyanogenMod Trebuchet. Sweet! :)

5. Download CM Builds
http://download.cyanogenmod.com/?type=nightly&device=galaxys2

6. Boot into ClockworkMod Recovery

1. Turn off phone.
2. Vol Up + Home + Power

7. CM9 Flash Guide
http://wiki.cyanogenmod.com/wiki/Samsung_Galaxy_S_II:_Full_Update_Guide

Version Info :)

EXTRA Goodies :p

Install Chrome for Android, which only available on Android 4+

1. Install from Market :)
https://play.google.com/store/apps/details?id=com.android.chrome&feature=search_result#?t=W251bGwsMSwxLDEsImNvbS5hbmRyb2lkLmNocm9tZSJd

Chrome to Phone! :]

If you are not in US, follow the follow steps:
1. Download the .APK
http://forum.xda-developers.com/showthread.php?t=756013

2. Install on Chrome
https://chrome.google.com/webstore/search/chrome%20to%20phone