A custom ROM which will take your Samsung Galaxy S3 i9300 to Android 4.3, thanks to the SlimBean 4.3 ROM by the SlimROM team.
The Open-Source-Project-based ROM comes with a lot of customisation options, enhancements and features.
Be noted that this is for the international version. Check this in settings – about phone. You will need to make a backup of the device using TWRP or ClockWorkMod and USB drivers installed onto the computer that you are using.
Enable USB debugging on your Samsung Galaxy S3. Do this by heading into Settings > Developer Options on Android 4 or later, or if you have Android 2.3 or later in Settings > Applications > Development. If you have Android 4.2 you can check in Settings > About Phone, scroll to the bottom and choose build number. You can then tap on the build number 7 times to reveal the Developer Options in Settings, which are hidden. Then choose enable USB debugging in Settings > Developer options.
Please make sure you have around 80% of your battery charge.
If your Samsung Galaxy S3 gets stuck in boot loop then you can Wipe Cache Partition and Wipe Dalvik Cache and then reboot and repeat if needed. You do need to give around 10 minutes for the ROM to settle down.
Follow the instructions below to install the ROM onto your handset.
1. Connect the Samsung Galaxy S3 to the computer with the original USB cable.
1. Connect the Samsung Galaxy S3 to the computer with the original USB cable.
2. Without extracting, copy the SlimBean ROM and Google Apps zip files to the root folder on the phone’s SD card. (Download ROM and GAPPS File from here)
3. Turn off the phone and disconnect its USB cable from computer.
4. Press and hold Volume Up, Power and Home buttons simultaneously until the Samsung logo appears on screen. Then release all three buttons for half a second and hold them again to boot the device into CWM recovery. Use Volume keys to navigate between options and Power key to select an option in recovery.
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.
7. Return to CWM recovery main menu and click Wipe Cache Partition and wait until process is complete.
8. Choose Wipe Dalvik Cache under advance option.
9. Choose Install zip from SD card and then click Choose zip from SD card. Now, navigate to the Slim Bean 4.3 build 1 ROM zip file that you copied earlier. Confirm the installation by choosing Yes and the installation will begin.
10. After the Android 4.3 Jelly Bean SlimBean ROM is installed, repeat step 9. But choose the Slim Bean Google apps zip file instead of ROM zip to install Google apps.
11. Once Google Apps is installed, return to the main recovery menu and hit reboot system now to reboot the phone into the newly installed Slim Bean Build 5 ROM.
The first boot may take some time. This is completely normal, please be patient.
If you ever need to restore your previous ROM, boot into recovery, choose Backup and Restore then restore your original ROM by selecting it from the list
Congratulation, your Samsung Galaxy S3 will now have Android 4.3 Jelly Bean by SlimBean ROM. If any problem exists please feel free to contact us by using the comment section.