How to Update SONY Xperia S with Stable Cyanogen Mod 9 Firmware

XPERIA LogoSONY XPERIA S are now blessed with the latest and stable firmware version of Cyanogen Mod 9 and in the due course of this article we will help you upgrade with this firmware effortlessly. Please note that this CM9 build is based on the Pure ICS Android 4.0.4 firmware version which comes with the latest Jellybean 4.1 look along with the latest version of Google Apps Package. Over a period of this article we will be checking out on what are the detailed instructions you need to follow but before that you will have to go through the list of pre requisites. Please note that this is not the official firmware version released by SONY and also we don’t have any estimated time on by when there will be an Official update of Jellybean 4.1 for Xperia S.

Disclaimer: We should not be held responsible or liable for any damage happened to your device due to not following the instructions. It is very unlikely that there will be any damage to your device if you follow all the instructions.

Check on whether your SONY Xperia S is rooted or not with the help of an app called “Root Checker” which you can download the from the Google PLAY Store. If the device is not rooted then you can’t apply this update. Also, note down the APN Settings if any as you may have to configure it again after the update. Please note that once the device is rooted, the warranty of the phone will be lost, the only way with which the warranty can be restored is by re applying the update with the official firmware.

From the path “Settings > Applications > Development > USB debugging”, you will have to enable the USB Debugging in your SONY XPERIA S. Minimum battery left in your device should not be less than 50%.

With the help of below mentioned steps, it’s recommended to back up the data and not with the PC Companion as it won’t detect the device in the custom ROM firmware.

SMS – Use “SMS Backup & Restore app”,
Contacts – Sync with the Gmail application,
Call Log - Call Log and Restore
Images, Songs, Videos, Files – Copy to internal / External SD Card,
APN and MMS Settings – Note down from the path “Applications > Settings > Wireless and Network > Mobile Networks > Access Point Names

So assuming that you have followed all the above mentioned instructions, you can head over to the detailed guide as mentioned below so that you can then update your device with the latest version of stable Cyanogen mod 9 firmware.

Procedure to Update SONY Xperia S with Stable Cyanogen Mod 9 Firmware:

  • Download the CM9 Firmware package & Google Apps Package from here to your computer. Once downloaded, connect your phone to the computer with the help of original USB Cable and place the same in your device.
  • Now turn off the SONY Xperia S so that it can be entered in the recovery mode. Hold the volume up button and power On the device so that you can enter the device in the recovery mode via the boot loader mode.
  • In recovery mode, you need to select “install zip from sd card” > “choose zip from sd card” to select the Cyanogen mod 9 firmware package and then the Google Apps package. Once selected, it will take around 5 -6 minutes for applying this update. Also, for the first boot it will take more time than usual as it has to setup all the system files.Ensure that you have cleared the cache in your device as it will wipe all the unwanted data from the recovery mode.

Note: If the device gets into the boot loop sequence or say gets stuck in the welcome screen, just re insert the battery and re follow the above instructions so as to again follow the above mentioned instructions.

Do share with us in the comments section just in case if you face any issues as we will try our level best to sort out the same. Congratulations you have now successfully upgraded the firmware of SONY Xperia S with the latest firmware version of Cyanogen Mod 9 firmware. In the coming days, we will be coming up with many such updates in the form of custom ROM firmwares.

Via

2 comments

  1. I NEED HELP. After successfully flashing the CM9 ROM. I experience some lags. I though may be I forgot something. I turned it off and opened CMW recovery to wipe the dalvik cache and repeat the process (install the firmware and Google package – then I wipe the data/factory reset and cache partition). When I reboot the device it got stuck on the welcome screen. please help I need to fix my phone by today

  2. hi! i forgot to copy cm9 firmware and gapps in my internal sd card im stuck in recovery mode cwm is there a way to copy it from where i am now? thank you