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Flash SlimBean Android 4.3 Stable ROM for Sprint Samsung Galaxy S3

SlimBean custom ROM now features its first build based on Android 4.3 Jelly Bean AOSP. Use this tutorial in order to learn how to successfully update your Sprint variant of the Samsung Galaxy S3 device. This is a tutorial that should be used by advanced users.

This build has been released by the SlimROM team and it is based on AOSP Android 4.3, AOKP, CM and ParanoidAndroid, as it borrows some elements from these popular ROMs. If you want to learn more about this release, then you can visit the developer’s page here.

If you want to correctly update your smartphone with this ROM, then you will need to take a look at the preparation guide below first:

  • Use this post only with the Sprint variant of the Samsung Galaxy S3 device.
  • Do not attempt to update any other Galaxy S3 version with the files I’ve listed here, as you will end up bricking the device.
  • Your device has to be factory unlocked, rooted and running a custom Recovery image like CWM or TWRP.
  • In the tutorial you will find the ‘wipe data/ factory reset’ step, which will delete all the system partition files allowing you a clean installation.
  • Factory Reset won’t delete contents from internal / external storage.
  • If you want to backup data from installed applications, then you can use Titanium Backup or Helium app.
    >  if you decide to use Titanium Backup app, then you have to change backup/ restore path to ‘legacy’ from app settings menu.
  • Backup SMS, Call Logs info and APN Internet Settings using the following tools for Android: SMS backup & restore | Call Logs backup & restore | APN Settings Backup & Restore. Root access is required for some of these apps.
  • Sync your Contacts data with your Gmail account.
  • Enable USB Debugging from Developer Options.
  • It would be best for you to create a NANDROID Backup for the ROM that is currently installed on your Sprint Galaxy S3.
    > this will set a restore point for your device and it can be used in case you have problems with the new ROM.
    > you’ll find the NANDROID ROM Backup step in the tutorial.
  • Make sure that you know what you’re doing before starting the installation. Note that we cannot be blamed in case you lose any important data in the process or in case you brick the phone.
  • Check the phone’s battery power so that it is over 50%, as the device shouldn’t power off in the middle of the updating process.
  • Read the entire tutorial and don’t skip any steps that I have listed in this post.

Since you’ve read all of the above, you can continue to the next part of this article and learn how to successfully update your smartphone without bricking it. Remember that you should ask for extra help in comments in case you cannot complete the installation.

How to update Sprint Galaxy S3 to Android 4.3 using SlimBean Jelly Bean 4.3 Stable custom ROM:

  1. Download the SlimBean zip file from here.
    – do not unzip this file and make sure to download the latest possible build.
  2. Download Slim-Gapps for this custom ROM from here.
    – this file has to be flashed so that all Google-based apps will be added to your device.
    – do not unzip the archive.
  3. Connect your device with your PC, then move both zip files on your Sprint Galaxy S3 internal storage.
    – when the files are copied, disconnect the device from PC.
  4. Power off your device now.
  5. Boot the smartphone into Custom Recovery Mode.
    – if you don’t know how to boot Recovery Mode, then use the info listed here to learn.
    – both CWM and TWRP are working with this tutorial.
  6. First thing that you need to do is to create a NANDROID Backup for the ROM that is currently installed on your device:
    – CWM: select ‘backup and restore’, then create the backup file.
    – TWRP: press Backup, then select the system files you want to set for a restore point. Confirm.
    > this sets a restore point for your device that you can use in case the new ROM doesn’t boot or you simply don’t like the SlimBean build.
  7. Now you can apply the ‘factory reset’ for your device in order to apply a clean install:
    – CWM: select ‘wipe data/ factory reset’. Confirm.
    – TWRP: press Wipe, then Factory Reset. Confirm the process.
    > if you don’t apply factory reset, then the new ROM might not boot successfully.
  8. Next, you can start the installation of the new custom ROM:
    – CWM: select ‘install zip from sdcard’, then ‘choose zip from sdcard’. Find the SlimBean ROM zip and confirm that you want to install it.
    – TWRP: press Install, then browse your device’s internal storage. Find the ROM file and confirm the installation by swiping the blue button at the bottom of the screen.
    > don’t press any buttons until all files are installed.
    > the process should take several minutes to complete.
  9. After the ROM is installed, you will need to repeat the actions in step 8 and flash the Slim Gapps zip too.
  10. When both zip files are flashed with success, return to the main custom Recovery screen. Reboot your Sprint Galaxy S3.
    > the first boot process might take at least five minutes to complete, which is why you should wait until all files are loaded.
  11. Enter your Google Account details when the home screen of SlimBean Android 4.3 Custom ROM appears.

These were all the steps that you had to take in order to successfully update your device with this new ROM. If the new custom ROM doesn’t boot or the Sprint Galaxy S3 enters into a boot loop, then you should repeat the entire tutorial once again. In case you do repeat the tutorial, then you should make sure that you don’t skip any steps that I have listed above.

After you manage to complete the installation you should start to test and customize the new SlimBean Android 4.3 ROM.

If you don’t like this new ROM, then it would be best for you to restore it to its previous ROM using the NANDROID Backup files created at step 6. If you find any errors or bugs while testing the new build of SlimBean, then you should tell us in comments.