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Update US Cellular Galaxy S3 with Official AOKP JB Build 5 custom ROM

The build 5 of AOKP Jelly Bean has a version that works with the US Cellular variant of the Galaxy S3, and you can use this tutorial to learn how to successfully install it. Note that this is a tutorial for advanced users and you should stay away from it in case you’re a beginner when it comes to flashing custom ROMs and using CWM Recovery or any backup apps.

The Android 4.1.2 is the firmware used for this custom ROM and you should get several new functions for your device. This is an official release by AOKP and not by Samsung, which means that your phone will remain rooted and bloat-free. If you already know what AOKP is and you’re running the previous Build 3 or 4 then you can install Build 5 over them without the need of ‘factory reset’ action.

Before beginning to install this custom ROM read the preparation below and learn which apps you can use in order to backup files and apps you will possibly still want to use with Build 5 of AOKP JB. Here’s what you need to take into consideration in order to successfully install the AOKP JB Build 5 on your US Cellular Galaxy S3:

  • Only the US Cellular version of the Samsung Galaxy S3 should be updated with the files listed in this article. If you’re device is a different variant then you shouldn’t attempt to install the custom ROM that I have listed in this post.
  • The US Cellular SGS3 should have root access and it should have the ClockworkMod Recovery image installed on it.
  • Make a full backup of the existing ROM so that in case something goes wrong, then you will be able to restore the ROM backup and your phone will work and you can try at a later date to flash another custom ROM.
  • A list of installed applications and the Call Logs, SMS and the APN Internet Settings values can be backed up using the following tools for Android phones: SMS backup & restore | Call Logs backup & restore | APN Settings Backup & Restore | AppBack for Android. Note that some of these apps will ask for root access.
  • Sync the Contacts with the phone’s assigned Gmail account. After you install the new ROM you will have to enter the same Google Account and sync Contacts.
  • Enable the USB debugging option so that you will be able to move files between your PC and phone. Also, charge your phone’s battery until its power level widget displays at least a value of 50%. This will prevent the device from powering off during the installation of this custom ROM.
  • Remember that you’re installing these files at your own risk and we cannot be blamed in case something goes wrong and your device is becomes unusable after installation of AOKP JB Build 5.
  • Read the entire post and make sure that you don’t skip any of the steps listed in the tutorial.

I think that this is all you had to read before moving to the next part of this post. Use the comments section to ask for more help or to post any extra questions.

How to install AOKP JB Build 5 on US Cellular Galaxy S3:

  1. Download the custom ROM zip from HERE. Save it on PC and don’t unzip the contents.
  2. Get the latest version of Gapps for Jelly Bean from HERE. Do not download other versions for previous Android OS.
  3. Use the USB cable to connect your computer with your smartphone. After that you should move the zip files on your phone’s internal SD card. Unplug the phone from PC and then power it off.
  4. Boot your phone into CWM Recovery mode. When it loads you should first select ‘wipe data/ factory reset’ option. Confirm this action. NOTE: In case your SGS3 features the build 3 or 4 of AOKP JB ROM, then you can skip this step and install AOKP JB Build 5 over it.
  5. Select ‘install zip from sdcard’ and then select ‘choose zip from sdcard’. Find the custom ROM zip on your device’s internal sdcard and then confirm that you want to install it.
  6. When the ROM installs successfully, you have to select once again ‘choose zip from sdcard’ and this time you have to find the Gapps zip. Confirm the install.
  7. After you have managed to install both the ROM and the Google Apps files, you should return to the main CWM REcovery screen.
  8. Now, select ‘reboot system now’. Wait at least 5 minutes for all files to be loaded and then the welcoming screen of AOKP / Android 4.1.2 will appear.
  9. Enter your Google Account and take control over the phone. Test all its functions and tell us in comments if you find any bugs or errors while running it.

NOTE: If the first boot takes too long to load or the phone gets into a boot loop, then you haven’t installed the new ROM correctly and that is why you have to remove the phone’s battery. After that, re-insert it back and repeat the entire tutorial starting with step 4 as you will eventually manage to flash all files successfully.

I hope that you’ve managed to update your device. However, if you don’t like this new release of AOKP JB then you can easily use the ROM backup file created before installing it, and restore your device to the previous Android OS setup.

To restore the ROM backup you will need to use ROM Manager, CWM Recovery, ROM Toolbox Lite or whatever feature, app or function you’ve used to create it in the first place. Keep in mind that all these actions should be applied by advanced Android users, as you shouldn’t mess around with your phone’s /system partition and such functions if you’re a novice.

If you have any other questions, please post them in our comments field.