1. STEP 1 - Backup your stuff
  2. 1.1) If you have ClockworkMod, do a Nandroid backup, just to be safe.
  3. 1.2) Export what you might want to keep with Kies (phonebook, call logs, messages) -> not needed if the rom is non-wipe.
  4. 1.3) Move multimedia content to your external SD card, if you haven't already done so -> not needed if the rom is non-wipe, but it's still a good idea to keep multimedia files on the external SD.
  5. 1.4) Backup your apps with Titanium Backup -> not needed if the rom is non-wipe.
  6. 1.5) Backup your /efs folder. WARNING: if the content of this folder gets damages, you might not be able to recover your phone. In a adb terminal type the following:
  7. adb devices
  8. adb shell
  9. su
  10. mkdir /sdcard/efs
  11. busybox tar zcvf /sdcard/efs/efs-backup.tar.gz /efs
  12. cat /dev/block/mmcblk0p1 > /sdcard/efs/efs_dev-block-mmcblk0p1.img
  13.  
  14. Navigate to the /sdcard/efs folder with Windows Explorer and backup its content on your laptop.
  15.  
  16. STEP 2 - Flash the stock odexed ICS 4.0.3 european rom
  17.  
  18. 2.1) Download GT-I9100_XEO_I9100XXLPQ_I9100OXALPQ_I9100XXLPQ.7z, unzip it, and flash it with Odin putting it in the PDA section. Make sure that there is no .PIT file selected, and that "repartition" is NOT checked.
  19.  
  20. STEP 3 - Gain root permissions
  21.  
  22. 3.1) Download CF-Root-SGS2_XX_XEO_LPQ-PROPER-v5.4-CWM5.zip, unzip it, and flash it with Odin putting it in the PDA section. Make sure that there is no .PIT file selected, and that "repartition" is NOT checked.
  23.  
  24. STEP 4 - Flash any stock deodexed ICS 4.0.3 european rom
  25.  
  26. 4.1) Download any stock deodexed rom, for example GT-I9100_WanamLite.XXLPQ.Deodexed.Stock.NO-WIPE.zip. Do NOT unzip it. With Windows Explorer put it in your INTERNAL SD card.
  27. 4.2) Reboot your phone into recovery.
  28. 4.3) Wipe cache.
  29. 4.4) Wipe dalvik cache.
  30. 4.5) Select "Install zip from sd card", then "Choose zip from internal sd card", select the zip name to install it.
  31. 4.6) Reboot.
  32.  
  33. STEP 5 - Flash ICS DOMINATION v4.0.4 theme for Android 4.0 AOSP experience
  34.  
  35. 5.1) Download ICS+Domination+v4.0.4+UNIVERSAL.zip. Do NOT unzip it. With Windows Explorer put it in your INTERNAL SD card.
  36. 5.2) Uninstall any previous mods that you might have had, especially JkayDeluxeSettings.
  37. 5.3) Reboot your phone into recovery.
  38. 5.4) Wipe cache.
  39. 5.5) Wipe dalvik cache.
  40. 5.6) Select "Install zip from sd card", then "Choose zip from internal sd card", select the zip name to install it.
  41. 5.7) Reboot.