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Update Galaxy S3 i9300 with Sotmax Jelly Bean 4.1.2 Custom ROM

After I have showed you how to update the Galaxy S3 to official Jelly Bean 4.1.2 XXELL4 Premium Suite OS, now I will be showing you how to update your phone with a Jelly Bean 4.1.2 based custom ROM firmware. This because there might be users who want more than the stock software for their devices, as we all know that a custom ROM is basically coming with extra features and capabilities for improving the Android experience and the phone’s performances. Well, this can be applied if we talk about the Sotmax firmware so during the present step by step guide we will be checking in how to update the Samsung Galaxy S3 with the same.

The best part about the Sotmax custom ROM is that it is stable with no reported bugs and issues. Furthermore the software is being based on the recently released XXELKC OS and it is pre-rooted, zipaligned and loaded with many features and apps that cannot be found in the classic version of the Android 4.1.2 Jelly Bean system. Therefore you will be updating your Galaxy S3 with a powerful software that will optimize and customize the performances, the battery and the internal system of your smartphone.

Be aware though as the Sotmax firmware isn’t coming from Samsung and has nothing to do with the mentioned company. In fact the update is being provided by those of xda-developers so we have them to thanks for this step by step guide. Now, before getting started with the actual tutorial, if you want to learn more about this Jelly Bean 4.1.2 based OS that can be installed on the Samsung Galaxy S3 I9300, you can check our source page by using the link from here. Then, return and resume the next lines from below.

The Sotmax custom ROM can be easily installed on your Galaxy S3, but you will first have to prepare the handset. And since this is an unofficial OS update, you will need to backup the SGS3 data before anything else. In this way you can be sure that your contacts, text messages, call logs, EFS, and so on are in safe hands. Be aware as a wipe will have to be performed therefore without backing up the data you will end up in losing all of your personal info. As a tip, you can search through our how to section for suitable backup and restore tutorials.

Then, you should also root the Samsung Galaxy S3 and install a custom recovery image into its system. Unfortunately this will be the only way possible for installing the Sotmax Android 4.1.2 Jelly Bean software on your S3, so take care of the same. First, gain root access and then get and flash the custom recovery image, as CWM recovery for example, can be installed only on a rooted device. While completing these operations you must know that the warranty will be void. This is happening because you are making changes into the internal system of your smartphone, so losing the warranty can’t be avoided if you want to update the Galaxy S3 with a custom ROM.

If you will need to you can restore the warranty; all you need to do is to downgrade to the stock ROM or to update with an official software released by Samsung especially for your S3 model number I9300.

Now, for being able to apply the below steps, you will have to first ensure that a Windows running computer is near you. On the same (and also on the phone) first of all deactivate or uninstall the antivirus protection (and then the Firewall one) as these tools can interrupt the update operation. Next, enable the USB debugging option on your S3 and make sure that the handset has enough battery power (more than 50%) for staying “alive” while the installation procedure takes place. And also check the version number of your smartphone as this tutorial should be applied only by those who own the Samsung Galaxy S3 model number I9300.

How to Update Galaxy S3 with Sotmax Jelly Bean 4.1.2 Custom ROM Firmware

  1. First of all you will have to download the update file.
  2. You can get the file from here.
  3. Then, place this file on your phone’s SD card.
  4. And then turn off the device as it must be rebooted in recovery mode.
  5. The recovery mode can be reached by pressing and holding on the Volume Up, Home, and Power buttons together.
  6. Use the recovery menu and select “wipe data factory reset” and “wipe cache partition”. It will be a good idea to backup the data first as all will be erased after this.
  7. Return to the main menu; you can do this by selecting “+++go back+++”.
  8. From the same menu, now select “install zip from sd card” and “choose zip from sd card”.
  9. Take the downloaded file and flash the same.
  10. In the end you will have to select “+++go back+++” and “reboot system now” and you are done.

That was all that must be performed if you want to update the Samsung Galaxy S3 to Android 4.1.2 Jelly Bean with Sotmax custom ROM firmware. Take note that the first boot might take longer to complete as usual, but there is nothing wrong with your S3. If you want to restore the stock OS, you can easily perform the same by re-booting in recovery mode (of course only if you have previously made a Nandroid backup). Use the comments area from below for talking with us and with other users or for sharing your impressions and thoughts.

Samsung Galaxy S3 Articles