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Flash Official OmniROM KitKat 4.4.2 Nighlty for Samsung Galaxy S3 LTE

Official OmniROM Android 4.4.2 builds are now available for the Galaxy S3 LTE I9305. If you use the instructions that I’ve listed in this post, then you will learn how to successfully update your device with a brand new KitKat ROM.

If you want to learn more about OmniROM and how did this project went live, then you can visit their web page here. Before starting the installation you should take a look at the preparation build below:

  • Use this post only with the International Galaxy S3 LTE model number I9305.
    – do not update any other device with the files that you will find in this post, as it will brick the firmware.
  • Your device has to be rooted and running the latest CWM Recovery image.
    – TWRP works just as well, but make sure that it is updated to its latest version.
  • NANDROID Backup has to be created for the installed ROM.
    – this step is listed in the tutorial and it will create a restore point for your smartphone, one that you can use in case the new ROM doesn’t boot in normal mode.
    – do not skip this step when you reach it in the tutorial.
  • Factory Reset is also required for your device, so you shouldn’t skip the process.
    – this step is listed in the tutorial.
    – Factory Reset wipes all data from your phone’s system partition, while leaving the Internal and External sdcards will be left unaffected.
  • Backup data from installed apps, SMS and other similar data using Helium for Android — here.
  • Sync all your Contacts info with your default Gmail account.
  • Check the smartphone’s battery charge level and make sure that it is over 50%, so that the device will not switch off in the middle of the installation process.
  • This is a post that should be followed by advanced Android users, do not blame us if you brick the phone.
  • Read the entire guide and don’t skip any steps.
  • For any other questions, use the comments section.

Since you’re read all of the above you should continue to the next part of this post and learn how to update your device.

How to flash OmniROM Android 4.4.2 Nightly for Galaxy S3 LTE I9305:

  1. Download the latest build of OmniROM KK Nightly build for your device from here.
  2. Download Gapps for this custom Android 4.4.2 ROM from here.
  3. Connect your phone to your PC and then move both zip files to its internal storage.
    -> disconnect the Galaxy S3 from computer when the files are copied successfully.
    > do not unzip the archived files.
  4. Power off your Galaxy S3 completely.
  5. Boot the phone in CWM Recovery Mode.
    – remember that TWRP will work, too. But, you need to make sure to apply the corresponding options.
    > if you don’t know how to boot custom recovery, then read here.
  6. First, create the NANDROID Backup of the installed ROM:
    – select ‘backup and restore’, name the file and confirm process.
  7. Now you can apply Factory Reset:
    – select ‘wipe data/ factory reset’, confirm this action.
    > if your device already sported a previous OmniROM KK Nightly build, then you can skip this step.
    > if you skip Factory Reset and the phone refuses to boot, you will be forced to repeat the guide and apply Factory Reset at your second installation attempt.
  8. Install the new OmniROM Android 4.4.2 Nightly ROM now on your Galaxy S3:
    – select ‘install zip from sdcard’, then select the ‘choose zip from sdcard’.
    – find the OmniROM 4.4.2 Nightly zip and confirm its installation.
  9. After the ROM is flashed, repeat step 8 actions and flash Gapps zip as well.
  10. When all the installations are complete you can return to the main custom Recovery and boot the phone in normal mode.
    > note that the first boot process of your new ROM takes several minutes before it loads all the files.
  11. Use your Google Account info in order to take control over your device when the home screen of OmniROM Android 4.4.2 appears.

NOTE: if the first boot process fails and it doesn’t load the new home screen, or the phone enters into a boot loop, then you have to repeat the entire tutorial once again. Make sure that you won’t skip any steps and that you will apply Factory Reset.

also, you might want to try to apply the Format /System option, too.

If the new ROM boots, but you don’t like how it works with your smartphone, then you can always choose to restore your phone to its previous OS using the NANDROID Backup file created in step 6. Also, use the comments field before if you need help.