How to Update Samsung Galaxy SIII I9300 with Cyanogen Mod 9 Firmware

Cyanogen mod logoKing of custom ROM firmware, aka the Cyanogen Mod 9 firmware version arrives for the Smartphone King, the Samsung Galaxy S III I9300 smartphone. In the due course of this article we will be checking out on how one can upgrade their SIII with this latest firmware. Please note that there will be some bugs in this firmware version since this one is a nightly build and not a final build of firmware. Also, note that this is not a firmware which is released by Samsung Electronics and is custom ROM firmware. This CM9 ropes in the latest ICS 4.0.4 firmware which otherwise too has arrived on SGSIII.

It was the last time when we saw Omega custom ROM firmware for your Galaxy S III smartphone and this is the 2nd custom ROM firmware dubbed as CM9 developed by Cyanogen Mod team. Cyanogen Mod developers are one of the best developers across the custom Rom firmware developers.

Rooting Information: For applying this custom ROM firmware, you need to root your device and once the device is rooted, the warranty will get void. The only way with which you can get back the lost warranty is by re applying with any of the Official firmware. You can note down the current firmware version which your device is on from “About Phone” section so that you can revert back to the same.

Disclaimer: We should not be held liable for any damage caused in the process of updating Samsung Galaxy S III GT I9300. It is very unlikely that your device will be damaged if you follow all the instructions to the point which are mentioned in procedure.

Screen Captures:

CM 1 CM 2 CM 3 CM 4 CM 5

Express Pre Requisites:

  • We should not be blamed for any data loss happened in the course of applying this update. For your convenience, we have summed up a quick guide on how to back up the data safely so that just in case if the data gets lost or corrupted, the same can be easily restored with the help of below mentioned steps.

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

  • Enable the Samsung KIES Mode, which can be enabled from the Settings option and also you need to enable the USB Debugging Mode too from the path “Settings > Applications > Development > USB debugging”.
  • Ensure that the minimum battery level is 50% and also you will have to disable the antivirus as well as firewall tools tend to disrupt the firmware update process.
  • Rooting your device is must, so before proceeding you need to ensure that you are on the Rooted firmware. You can check whether your device is rooted or not with an App called “Root Checker” which can be downloaded from the PLAY Store. If the device is not rooted, you need to root the same and install the Clock Work Mod Recovery Image in your Galaxy S III.

Assuming that you are done with all the above mentioned instructions, you can now proceed to the next page where we have summed up a detailed guide on how to apply this firmware update in your device.

3 Comments
  1. Reply Agbe June 18, 2012 at 9:30 pm

    when is the one for the S2 coming?

  2. Reply Noel Cardoza June 18, 2012 at 9:56 am

    looks awesome

  3. Reply Gogu June 18, 2012 at 9:38 am

    Yay! It’s awesome. Works perfectly on my both 2 new Galaxy SIII

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