More and more custom ROMs updates are being released for the Samsung Galaxy S3 devices, so it is quite hard to decide which firmware is the best one for your phone. Most of these unofficial ports of the Android Jelly Bean software are usually coming with bugs and issues therefore you should be careful when choosing a new OS for your S3. Anyway, today I will show you how to install the new Omega v34 custom ROM on your Galaxy S3 I9300 and update your handset to stable Android 4.1.2 OS.

As mentioned the Omega v34 is a stable firmware with no reported bugs or things that aren’t working. Furthermore, the software is being based on the XXELK4 platform meaning that the Jelly Bean 4.1.2 will be installed on your Galaxy S3. But it should be clear for you that the present update isn’t an official one provided by Samsung. For official Android upgrades you should check other guides from our how to section. Now, this ROM is being developed and offered by the Omega team, so we have them to thanks for this step by step guide.

Also before heading to the installation section of this tutorial it is recommended to check the rest of the updates which are being available for your Galaxy S3 I9300 (just click on the link) as this is the only way in which you can be sure that this is the suitable firmware for your smartphone. Then, resume the guide by completing the pre requisites and only after that start the actual update operation. Remember that Omega v34 is being powered by the XXELK4 platform so you will be flashing an Android 4.1.2 Jelly Bean based custom ROM on your SGS3.

As usual, each time you are dealing with complex operations, like the present one, it is important to make a full backup for all the data which is being saved on the internal storage memory of your device. In this way you can be sure that all of your personal info will be in safe hands. Therefore, be patience and apply this task before going any further.

As soon as the backup is completed you need to root the Galaxy S3. By performing this procedure you will unchain the system of your phone so that the custom ROM can access the internal files. Without rooting you can’t install the Omega software on your Galaxy S3 and update to Android 4.1.2. Also, another aspect related to the root process is referring to the warranty: it will get void so be careful in what you do. As a final tip, you can restore the warranty by updating to the official Jelly Bean OS which had just been made available by Samsung.

On a rooted OS you must then install a custom recovery image. CWM recovery should be perfect for you. This tool will be used for the update procedure, so it’s extremely important for your S3 to feature this app. Up next, you need to ensure that a Windows running computer is near you and that you can use your device and its USB cable. On both (PC and handset) you should deactivate or even uninstall the security tools (antivirus and Firewall), and then on your S3 enable the USB debugging option (go to “Settings -> Applications -> Development -> USB debugging”). Do not apply this tutorial if you own a similar smartphone with the Samsung Galaxy S3 model number I9300 because the Omega v34 Jelly Bean 4.1.2 will work only on the mentioned phone. Don’t forget to charge the battery of your device before starting the installation operation.

How to Update Galaxy S3 I9300 to Jelly Bean 4.1.2 with Omega v34 Custom ROM firmware

  1. The first to start with is the link from here. Use it and download the update file.
  2. Save the file on your computer.
  3. Connect the device with the PC and then select the downloaded file and place it to your phone’s SD card.
  4. Unplug the USB cable.
  5. Turn off the phone and then reboot it in recovery mode.
  6. From CWM recovery first select to apply a full wipe (remember to backup the data).
  7. So, select “wipe data factory reset” and “wipe cache partition”.
  8. When the wipe is completed, select “+++go back+++” and enter the main menu again.
  9. From there now select “install zip from sd card” and “choose zip from sd card”.
  10. Take the file from the SD card and flash the Omega Jelly Bean 4.1.2 update on your Galaxy S3.
  11. The installation process will take a couple of minutes.
  12. In the end select “+++go back+++” and “reboot system now”.

That was all. Take note that the first boot will take longer than usual, so don’t worry there is nothing wrong with your device. Well, now your Samsung Galaxy S3 I9300 is running the Omega v34 Android 4.1.2 custom ROM firmware. Test the software and if you don’t like it use the CWM recovery again and restore the stock ROM.

shweref · 6 years ago

if you provide screenshot for the OS is better than after installation diced its not that good

corner-left-up dots-three-vertical