Samsung Galaxy S3 devices are waiting to get the Android 4.2.2 Jelly Bean update from Samsung; however there is something available for Samsung Galaxy S3 owners on Sprint, but unofficially.

The Slim Bean team has released the Slim Bean Build 3 based on Android 4.2.2 Jelly Bean ROM custom firmware for Sprint Samsung Galaxy S3 SPH-L710.

As this is not an official Jelly Bean update, you will require custom recovery like ClockworkMod to flash the ROM zip and Google Apps zip files on your Samsung Galaxy S3 smartphone.

Before you go ahead with the installation process, keep one thing in mind: there are always chances of the device experiencing bricking issues. That only happens if the rooting is not done properly and the instructions are not followed step-by-step.

Follow these steps to prepare your device for the big task:

1: The process is meant only for Sprint Samsung Galaxy S3 SPH-L710. Therefore, users are advised to check their devices' model number in: Settings > About phone.

2: Make sure the device has at least 80 percent of battery backup.

3: Download and install USB drivers for your Galaxy S3 and enable the USB debugging mode.

4: Back-up all your important data.

5: Download and install ClockWorkMode Recovery.

6: Download Slim Bean Build 3 ROM 4.2.2 Jelly Bean ROM For Galaxy S3 L710

7: Download Google Apps

8: All the custom ROMs, firmware, official firmware updates, tools and anything mentioned in this tutorial belong to their respective developers. Mobile&Apps will not be held responsible for anything that goes wrong.

Now you are all set to start the smooth task; just follow the instructions given below step-by-step:

1: Connect your Galaxy S3 to your computer via micro USB cable.

2: Copy and paste the downloaded Slim Bean Build 3 ROM 4.2.2 Jelly Bean ROM For Galaxy S3 L710 to your phone.

3: Switch the device off and detach the USB cable.

4: Press and hold the Power + Volume Up + Home Button to enter ClockWorkMode Recovery.

5: In Recovery menu, you are always recommended to perform a full Wipe Data/Factory Reset to avoid crashing and ROM compatibility issues. It is an optional step if you upgrade from your previous ROM version. For CWM recovery, use Volume key to navigate in Recovery Mode. For TWRP, use touchscreen to navigate in Recovery Mode.

6: Do Wipe Cache Partition - Select from the menu and select Yes to confirm.

7: Go to advanced and do Wipe Dalvik Cache - Select from the menu and select Yes to confirm.

8: From the main menu in Recovery, select the install zip from SDcard, then select choose zip from internal SDcard, browse to folder location and select the AOKP Android 4.2.2 Jelly Bean file and click Yes to install.

9: Back to main menu in Recovery, select the install zip from SDcard, then select choose zip from internal SDcard, browse to folder location and select the Google Apps file and click Yes to install.

10: After the installation completes, go back to recovery's main menu.

1. Select reboot system now to reboot the phone.

2. For first boot up, it normally takes a longer time. Please wait patiently.

[Source: Android Jinn]