Galaxy S GT I9000 Gets Android 4.2.1 Update with Official AOSP Jelly Bean Firmware [How to Install]
Galaxy S GT I9000 Gets Android 4.2.1 Update with Official AOSP Jelly Bean Firmware

The Galaxy S GT I9000 gets its first official Android Open Source Project (AOSP)-based Android 4.2.1 (Jelly Bean) firmware. The AOSP release brings a host of Jelly Bean features for the Galaxy S. There is still no word on the release of Android 4.2 updates from Samsung.

Note: As the ROM is a custom release, it may have bugs or broken features that are likely to be fixed in forthcoming updates

Key Points to Note

    • The official AOSP Jelly Bean firmware and the instructions provided in this guide are applicable for the international version Galaxy S GT (I9000). Verify device model number before proceeding
    • IBTimes UK advises users to backup apps, important data and settings to avoid risk of data loss while flashing official AOSP firmware on the Galaxy S (I9000). It is advisable not to use ROM Manager or KIES software to backup data, as it may damage or brick the device
    • Instructions provided in this guide are meant for reference purpose only and do not cover any warranty claims involving device damage or issues arising out of using the AOSP based Android 4.1.2 firmware. Users are advised to proceed at their own risk


    • Verify the device is rooted with ClockWorkMod Recovery (CWM)
    • Enable USB Debugging mode on the phone by navigating to Settings > Applications > Development
    • Ensure 80 percent battery charge

How to Install Official Android 4.2.1 AOSP Firmware on Galaxy S GT (I9000)

    • Connect phone to PC using original USB cable and then copy the two zip files downloaded to the root folder on the phone's SD card
    • After copying the two files, disconnect the device from the computer and download the ROM Manager app from the Google Play Store. Launch the app and grant Superuser access to the device by tapping on Grant option
    • In the ROM Manager app, choose Enter into Recovery Mode option for booting the device in Recovery mode. As an alternative, the device can be manually booted in recovery mode through a button sequence. To do so, switch off the device and then reboot by pressing and holding the Volume Up and Home key buttons (the middle button) together, while simultaneously tapping the Power button.
    • In Recovery mode, choose Wipe Data/Factory Reset and click Wipe Cache partition. If the device boots normally, retry the process of booting the device in Recovery mode
    • Now, tap Install Zip from SD card and choose the Android 4.2.1 AOSP ROM and Google Apps Package to install them in sequence. It will take about three to five minutes to complete the update process
    • After the firmware is installed, hit Go Back and tap Reboot System Now

Note: If the device fails to boot or display the home screen after the firmware update, then remove the battery and reinsert it to boot the device again in normal mode.

The device is now running on official Android 4.2.1 AOSP firmware. To check if the firmware is updated correctly, go to Settings > About Phone and check the firmware version installed.

[Source: Android Advices]