Update Galaxy S3 I9300 to Android 4.2.2 Jelly Bean via SlimBean Build 8 Final ROM [How to Install]
Update Galaxy S3 I9300 to Android 4.2.2 Jelly Bean via SlimBean Build 8 Final ROM [How to Install]

Galaxy S3 GT-I9300 users can now enjoy the most stable Jelly Bean experience on their phones, thanks to the release of Android 4.2.2 SlimBean Build 8 Final ROM from the industrious SlimROMs team. The latest SlimBean custom release is based on the original Android Open Source Project (AOSP), which brings a host of bug-fixes and feature enhancements over its previous release.

Some of the noteworthy features ported into the SlimBean Build 8 Final ROM are listed below:

  • Various improvements under the hood for upcoming 4.3
  • Added Bug-report feature to SlimCenter. It creates a zip file containing basic system information and system-logs (logcat, kmsg, last_kmsg).
  • Rearranged (more logical) Settings
  • All backend shortcut functions combined with settings observers vastly reduced and simplified.
  • Shortcuts/buttons completely redone for NavBar/Pie/Notification Shortcuts/Lockscreen Shortcuts/NavRing.
  • Fix IllegalArgumentException in Privacy Guard
  • USB: gadget: mass_storage added sysfs entry for cdrom to LUNs
  • Fix bootzip. Install signapk to sign the packages and some cleanup
  • Fix room service to allow dependency override
  • Exynos: Update Mali drivers
  • Support for new devices: Motorola xt926/xt925, p5100, p5110, d2usc as well as t0lte, t0lteatt and t0ltetmo
  • All "Master Key" exploit patches published by google integrated + additional security fixes
  • Gapps update: Google Music, Google Play Services, moved google Now to system app
  • App update in app download section google+

Head over to the developer source page to learn more about the latest build of SlimBean ROM.

Key Points to Note

  • The SlimBean Build 8 Final 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 experiencing boot 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).
  • The instructions provided in this guide are meant for reference purpose only. IBTimes UK reminds its readers that it will not be held liable if device is damaged or bricked during or after firmware installation. Users are advised to proceed at their own risk.


How to Install Android 4.2.2 Jelly Bean Update on Galaxy S3 GT-I9300 via Stable SlimBean Build 8 Final ROM

1. Connect and mount the phone's internal 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. Once the file copying process is complete, 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. Wait until the screen flashes and then quickly release all three buttons.

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 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. Finally, choose Wipe Dalvik Cache under advance option and let the wiping process complete.

7. Select Install zip from SD card and then click Choose zip from SD card. Now, browse to the Slim Bean Build 8 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 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 8 Final 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 8 Final ROM. Go to Settings > About Phone to verify the firmware version installed.

ALSO READ: Update Galaxy S3 I9300 to Android 4.3 via ParanoidAndroid 3.97 ROM [TUTORIAL]

[Source: XDA Developers]