Samsung Galaxy S3 is among one of many Galaxy devices skipping Android 4.2.2 and going straight to Android 4.3 Jelly Bean. The company prefers to be owners of the smartphone a newer Android version but may take time before it is released. However, you can manually upgrade it to Android 4.3 using unofficial CyanogenMod 10.2 build.

Android 4.3 CM10.2 for Samsung Galaxy Note 2 GT-N7100

The new CyanogenMod 10.2 build designed for Galaxy S3 includes the following new features:

- Permission Manager

- Virtual Surround Sound

- Improved Dial Pad

- Better Linux kernel

- Bluetooth Low Energy

- Restricted profiles in user account

- TRIM feature

- Theme engine

- New focal camera application

At this point, it is still in early stages which may contain bugs and certain functionality issues.

Warning: This is a custom ROM which can damage your device. Developers and sources are not liable for any damages which may happen on your smartphone. Read and follow the instructions carefully to any damages or errors to occur on your Galaxy S3. Do this at your own risk.

Requirements:

- Create a backup of all your personal information settings and data files on your Galaxy S3 GT-I9300. Do not flash this to other variants of Galaxy S3.

- Check the battery level and it must be at least 50 per cent to avoid power interruption.

- Install the necessary USB drivers for your Galaxy S3 on your computer. Download the drivers here.

- Enable USB debugging mode on your device. Go to "Settings > Applications > Development > tick USB debugging."

- Install a ClockworkMod recovery on the Galaxy S3 and make sure that the device is already rooted.

- Download the Unofficial Android 4.3 CM10.2 Firmware and the Google Apps to your computer.

Flashing Instructions:

1. Connect your Galaxy S3 I9300 to your computer using a USB cable.

2. Copy then paste the Unofficial CyanogenMod 10.2 Android 4.3 ROM and the Google Apps package to the SD card of your Galaxy S3. Never extract any of the zip files.

3. Disconnect the smartphone from your computer and turn it off.

4. Reboot it into recovery mode by pressing and holding the volume up, power and home keys together then release all buttons once the Samsung logo appears.

5. Inside the recovery mode, create a Nandroid backup of your current ROM. Select "backup and restore > backup." You can restore the saved ROM anytime by rebooting into recovery mode and selecting "backup and restore > restore."

6. Perform a full wipe on your handset. Select "wipe data/factory reset" and "wipe cache partition." Then go back to the main menu then select "advance > wipe Dalvik cache."

7. Go back to the main menu then select "install zip from SD card > choose zip from SD card." Choose the CM10.2 Android 4.3 custom ROM you have copied earlier then confirm installation. Apply the same method with the Google Apps package.

9. After the installation, go back to the main menu then select "reboot system now."

10. The boot may take at least 5 minutes before reaching the home screen due to the "first time" running the ROM.

Well done! Your Galaxy S3 can now enjoy all features from Android 4.3 Jelly Bean and special customisation of CyanogenMod 10.2 custom ROM.

For any questions, comments or upgrade from earlier CyanogenMod custom ROM, check out Android Jinn Galaxy S3 Android 4.3 official Web page.