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Install Vanilla RootBOX Android 4.2.2 custom ROM for Galaxy Samsung Galaxy S3 I9300

A new custom ROM now is available for Samsung Galaxy S3, this custom ROM is named Vanilla RootBox 3.9.1 custom ROM. In this article,  we will teach you how to install this new custom ROM based on Android 4.2.2 on your Galaxy S3 model no I9300. So make sure you good understand all the following instructions and don’t skip any step from the next sections.

The Vanilla RootBox 3.9.1 custom ROM has been created by an XDA member and an advanced developer named bajee11, and with this article we want to thanks for this opportunity to share with as his masterly work. Like you probably know the Vanilla RootBox is one of the most popular custom ROM for the Samsung Galaxy S3 device and with this article you’ll be able to install it in your S3 device. His developer fixed a lot of bugs and errors with this version.

Before starting you need to follow some prerequisites that are necessary to be followed first:

  • This article and all instructions listed here are compatible and must to be used only for the Samsung Galaxy S3 model number I9300. So don’t use the same in other any similar devices.
  • The Samsung Galaxy S3 model number I9300 has to be a rooted device and to have a custom Recovery image installed on it, we will use CWM Recovery for this tutorial, these conditions are necessary, and without these you won’t able to install this new custom ROM.
  • The backup is extremely important when you want to make any modification at the OS level on your device, and that’s why you have to create a full backup of your actual installed ROM, to do this create a NANDROID backup using the CWM recovery tool.
  • During this tutorial,  you need to wipe the data and to perform a factory reset for your device, and you need to backup all your critical data stored on your device’s internal memory, backup data like SMS, for that you can use the SMS backup and restore app. Perform a backup for your Call Logs using the Call Logs backup and Restore app, also the APN Settings with the APN Settings Backup and Restore, save your installed applications using the AppBack for Android.
  • Your data from the device’s external SD card won’t be deleted during the flashing process.
  • If this new custom Vanilla RootBOX JB based on Android 4.2.2 doesn’t work like you want, or you simple don’t like particularly much you can use the NANDROID backup that you created previously to restore your previous ROM.
  • You need to back-up your contacts, and to do this you can use the Synchronization of contacts with your Gmail Account.
  • Verify your device’s battery and be sure you have enough power left it, charge it full to be sure you won’t receive a forced power off in the middle of flashing process.
  • All the instructions and information listed here are only for educational and instructional purpose, so the android.sc team cannot be blame or liable in case you’ll lose data or you brick your device applying the presented guide, that’s why we recommend you to create a NANDROID backup to be able to restore your previous ROM.
  • I think that are the all the prerequisites that you need to follow before you move to the next section.

How to flash Vanilla RootBox Jelly Bean 4.2.2 custom ROM for the Samsung Galaxy S3 I9300 device:

  1. Firstly download the Vanilla custom ROM from HERE and save this file on your PC, don’t extract its contents only save it.
  2. Secondly download the Gapps compatible with Android 4.2.2 Jelly Bean OS from HERE and save it in your computer. This pack will install all the Google based applications.
  3. Now, connect your S3 device to the PC using your USB cable.
  4. Move the both downloaded files to your S3 device’s internal SD card without to extracting the archives components.
  5. After you copied the files, disconnect the S3 device from the PC.
  6. Power off your device and after that boot into CWM Recovery mode. To do that press the Volume Up+Home+Power buttons simultaneous and release the buttons when the CWM Recovery mode menu is fully displayed.
  7. From the CWM Recovery menu select the ‘backup and restore’ option and chose to create a NANDROID backup of your actual ROM. This backup will represent a restore point in case you need to restore your actual ROM if your device won’t boot after you installed the Vanilla custom ROM.
  8. From the CWM Recovery menu select ‘wipe data/ factory reset’ option, and after that confirm this action.
  9. Now, select ‘install zip from sdcard’ and then ‘choose zip from sdcard’ and find the RootBox ROM copied zip file and confirm that you want to flash it.
  10. After the Vanilla RootBox has been installed completely, you need to install the Gapp in your S3 device. To do that you need to select once again the “choose zip from sdcard’ option once again, find the copied Gapp zip file and after that install it.
  11. Now, go back to the main menu of the CWM Recovery Mode and from there select ‘reboot system now’, this option will restart your smartphone.
  12. Now you need to wait for completing the first boot process around of 6 minutes after your device will load the new custom ROM you need to join your Google account, and  now you can enjoy  your new Vanilla RootBox custom ROM installed in  your SGS 3 smartphone.
  13. Congratulation, you successfully installed the new Android 4.2.2 Jelly Been ROM on your Samsung Galaxy S3 I9300.

Note: If, the new Vanilla RootBox custom ROM doesn’t work or you don’t like exceptionally well, you can restore your previous ROM using the NANDROID Backup that you have been created previously.

Please use our comment section in case you have supplementary questions.