Install Android 4.2.2 Jelly Bean Update on Galaxy S3 I9300 via SlimBean Build 6 ROM [GUIDE]
Install Android 4.2.2 Jelly Bean Update on Galaxy S3 I9300 via SlimBean Build 6 ROM

Galaxy S3 GT-I9300 users can now update their phone to the latest Android 4.2.2 (Jelly Bean) custom firmware via SlimBean Build 6 ROM, thanks to the industrious SlimROMs team. Although Samsung is expected to release its latest Android 4.2.2 official firmware for the handset by the end of June, those who cannot wait for the official release can still experience stock-like Android experience via SlimBean Build 6 ROM.

The latest iteration of SlimBean ROM (build 6) continues the tradition of a fast and smooth Jelly Bean experience in a lightweight package. It also adds a host of bug-fixes and feature enhancements over its previous build.

SlimBean Build 6 ROM Bug-Fixes and Feature Enhancements

Here is the complete list of bug-fixes and feature enhancements ported into this ROM:

  • Add DC-HSPA+ to framework
  • Fixed GlowPad layout on Larger devices
  • Massive improvements to T9 dialer
  • TRDS 2.0 [Updated Packages + Gapps]
  • Added Power Dis/Connect Notification sound options
  • Added TruView [Camera]
  • Massive updates to DashClock [Beta2]
  • Fixed Torch FC
  • Added Multi-Part/Split SMS option [Mms]
  • Added Transparent Incoming call [Phone]
  • Added Auto-Brightness sensitivity
  • Changed keyboard hints to full holo blue light [LatinIME]
  • Fixed BT MAP requests
  • More optimizations and fixes for memleaks for Slim changes
  • And some more optimizations to Dalvik!
  • Fixed NFC bugs
  • Fixed TRDS on car dock

NOTE: The instructions provided in this guide are meant for reference purpose only.IBTimes UK will not be held liable if device is damaged or bricked during or after the firmware installation. Users are advised to proceed at their own risk.


  • The SlimBean Build 6 ROM and the instructions given in this guide are meant for the Galaxy S3 GT-I9300 model only. Verify the device model number by navigating to Settings > About Phone.
  • Back up data and settings using a recommended custom recovery tool such as ClockworkMod (CWM) or TWRP, as it creates a complete image of the existing phone setup.
  • Verify correct USB drivers for the phone are installed on the computer (download Samsung Galaxy S3 GT-I9300 USB drivers)
  • Ensure USB debugging mode is enabled on the phone, by navigating to Settings > Developer Options (if device is running Android 4.0 or later) or Settings >Applications> Development (if device is running Android 2.3 or earlier). Otherwise if device is running Android 4.2, perform the following steps:
  • Go to Settings > About Phone
  • Scroll to the bottom of the screen and select Build Number
  • Tap the phone's Build Number seven times to unlock or reveal the hidden Developer Options under Settings. Then select the checkbox to enable USB debugging mode under Settings > Developer Options.
  • Make sure the phone has at least 80% battery charge to prevent unexpected device shutdown (due to battery drain) while installing the ROM.
  • Ensure the device is unlocked (not locked to a specific carrier) and rooted with ClockworkMod Recovery (CWM) installed.
  • If the device is stuck at booting or is experiencingboot loop issues, perform Wipe Cache Partition and Wipe Dalvik Cache a few more times before rebooting.
  • Allow newly installed ROM to stabilise for five minutes before you start working on it.
  • If you encounter a Status 7 error message while flashing the firmware, then it could be due to an incompatible device or a necessary kernel may be missing (for instance, a Jelly Bean Kernel must be installed before installing any Jelly Bean ROM).


How to Install Android 4.2.2 Jelly Bean Update on Galaxy S3 GT-I9300 via SlimBean Build 6 ROM

1. Connect and mount the phone's storage or SD card on computer via USB cable.

2. Without extracting, copy the downloaded ROM and Google Apps zip files to the root folder on the phone's SD card.

3. After the file transfer process completes, just disconnect the USB cable from computer and Power off the phone.

4. Boot the device into recovery mode by pressing and holding Volume Up, Home and Power button together. Release all three buttons only when the screen flashes.

5. Take a Nandroid backup of the current ROM so that it can be restored later if the new ROM fails to work or you want to return to original ROM. To do a backup, choose Backup and Restore, and then click Backup on the next screen. Return to main recovery menu once backup is done.

6. Perform a full data wipe task as follows: choose Wipe Data/Factory Reset then click Yes on next screen to confirm. Wait for a few minutes until the data wipe process completes. Then return to CWM recovery main menu and click Wipe Cache Partition. Wait until the wiping process completes. Finally, choose Wipe Dalvik Cache under advance option.

7. Choose Install zip from SD card and then click Choose zip from SD card. Now, browse to the Slim Bean Build 6 ROM ZIP file copied earlier to your phone in Step 2 and select it by tapping Power button. Confirm the ROM installation by choosing Yes on the next screen and the installation will begin.

8. Once the ROM is installed, repeat step 7. But, choose the Gapps zip file instead of ROM zip to install Google apps.

9. Once Google Apps is also installed, return to the main recovery menu and hit reboot system now to reboot the phone into the newly installed Slim Bean Build 6 ROM. The first boot may take some time. So, please be patient.

10. Returning to Previous ROM: To restore your previous ROM, boot into recovery, choose Backup and Restore and then restore your original ROM by selecting it from the list.

Galaxy S3 GT-I9300 is now successfully updated to Android 4.2.2 Slim Bean Build 6 ROM. Go to Settings > About Phone to verify the firmware version installed.

[Source: Droid Firmwares]