Update Xperia arco S to Android 4.0.4 ICS via CM9–How To

You can now download and install Android 4.0.4 ICS based custom firmware CM9 on your Xperia arco S. CynogenMod Team started to roll out nightly version of CM9 that enable Android 4.0.4 Ice Cream Sandwich on your Xperia arco S. The good thing about nightly version is, it updated daily, hence existing issues are fixed much faster. Android 4.0.4 ICS comes with various new feature over previous ICS release, hence you may always love to try it. CM9 builds also comes with so many customization that you won't see in a stock firmware and can't just avoid. We summed up a detail installation tutorial of Android 4.0.4 ICS based CM9 custom ROM on Xperia arco S below.



This tutorial is only for Xperia arco S. Don’t try this guide on any other Android device. Also, we are not responsible for any damage caused due to the instruction given in this page. Try this at your own risk. However, it is very unlikely that your device will be damaged if you follow all the instructions as it is which are mentioned in procedure.  

Pre Requisites:

1. Backup your device data. You can follow our ultimate backup guide.

2.  Make sure your device have at least 60% battery power. You can install an app like Battery Notifier BT Free on your Android device to check it easily.

3. You already have USB Driver Installed for Xperia arco S in your PC. [Download USB Drivers]

4. Make sure USB Debugging is enabled otherwise you won’t able to transfer file between PC and Xperia arco S. [Guide].

5. Your device have ClockworkMod Recovery Installed. [Guide]

6. Your device is rooted already.

If you done everything that we mentioned above then you are ready to follow step-by-step guide on how to install Android 4.0.4 ICS based CM9 ROM on Xperia arco S.

File Required(Download by clicking on it)

  1. CM9 Android 4.0.4 ICS ROM For Xperia arco S [Filename: cm-9-20130929-NIGHTLY-hikari.zip]
  2. Google Apps [Filename: gapps-ics-20120429-signed.zip]

How to Install Android 4.0.4 ICS based CM9 ROM on Xperia arco S

  1. Connect your device to PC using USB cable and then copy downloaded files to the SD card of your device. Important: Don’t extract any files.
  2. Disconnect USB and then turn off your Xperia arco S.
  3. Boot into recovery mode. To do so,  reboot phone and press back button few times while booting. [use volume buttons to scroll and Power button to select]. Alternatively try this: Recovery Mode without Key Combination.
  4. Perform a Nandroid backup of your existing ROM that you can restore later if this new ROM not work or you want to go back into your previous ROM. To perform a backup, select Backup and Restore, then on the next screen, select Backup again. Go back to main recovery menu after backup is complete.
  5. Now, perform data wiping task. To do so, select wipe data/factory reset, then select Yes on next screen to confirm your action. Wait few minutes till the data wipe is complete. Now come back to CWM recovery main menu. Select wipe cache partition and after wiping process done, select Wipe Dalvik Cache under advance option to perform Dalvik cache wiping.
  6. Select install zip from sdcard, then select choose zip from sdcard. Now, locate the cm-9-20130929-NIGHTLY-hikari.zip file that you copied earlier in Step 1 and select it by pressing Power button. Confirm installation by selecting Yes – Install _____.zip on the next screen. The ROM installation will begin.
  7. Once the ROM installation process end, repeat the step 6 but choose the gapps-ics-20120429-signed.zip file instead of ROM zip to install the Google apps package.
  8. When installation is completed, go back to the main recovery menu and select reboot system now to reboot your Xperia arco S and boot up into customized Android 4.0.4 ICS ROM CM9. The first boot will take time, so be patient!
  9. Returning to Previous ROM: To go back to your previous ROM, boot into recovery, select backup and restore then restore your previous ROM by selecting it from the list.

Congrats! Android 4.0.4 ICS firmware based custom ROM CM9 is now installed and running on your Xperia arco S.