Galaxy Nexus I9250
Update Galaxy Nexus I9250 Photo: XDA Developers XDA Developers

Galaxy Nexus I9250 is one of the lucky few Samsung devices to get both the official and custom ROM releases for the latest Jelly Bean update Android 4.1.2. In an earlier IBTimes UK report, we saw the Jelly Bean manual installation steps for the official OTA release of Android 4.1.2 update for the same smartphone using JZO54K ROM. Installation of the AOKP Build 5 ROM requires your device to be rooted and ClockworkMod (CWM) Recovery installed on it.

AOKP Build 5 ROM Based Android 4.1.2 Jelly Bean Features

  • Custom NavBar for Tablets
  • NavBar widgets are borrowed from Ice Cream Sandwich (ICS)
  • Highly customizable Lockscreen Ring targets, with a shiny new editor in ROMControl (CM team takes the credit for the base of framework part)
  • Alternate default app picker (like in GB)
  • Menu UI Overflow Toggle
  • Option to disable vibration for Notification expansion
  • RAM Bar in the Recents panel
  • Timeout and instant lock options for Slide lock
  • Tons of beautiful new icons by Kwes
  • VPN Traffic statistics in human readable format

Key Points to Note

  • The AOKP ROMand the instructions given in this guide are compatible only with the Galaxy Nexus I9250 model and will not work on any other device. Verify your device's model number by navigating to Settings > About Tablet.
  • The ROM is not an official release, but a custom ROM based on AOSP release of Android 4.1 Jelly Bean.
  • IBTimes UK advises users to back up apps, important data and settings to avoid data loss while installing the Android 4.1.2 Jelly Bean update on your Galaxy Nexus I9250.
  • The 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 AOKP Build 5 firmware update. Users are cautioned to proceed at their own risk.


  • Enable USB debugging mode by navigating to Settings > Application > Development. This feature helps in connecting your Android phone with the computer.
  • Verify that your phone's battery is at least 85 percent charged to prevent unexpected device shutdown while flashing the AOKP custom ROM or installing the Android 4.1.2 Jelly Bean update.
  • Ensure that your Galaxy Nexus phone is factory unlocked. Also, verify that the device is rooted and Clockwork Mod (CWM) Recovery installed on it.

How to Update Galaxy Nexus I9250 to Android 4.1.2 Jelly Bean with AOKP Build 5 ROM

Step 1 - Download Android 4.1.2 AOKP Build 5 Jelly Bean ROM and Google Apps for your Galaxy Nexus on your computer.

Step 2 - Connect and mount your Galaxy Nexus I9250 USB mass storage on your computer using an USB cable.

Step 3 - Copy the Android 4.1.2 ROM zip file to the root folder on your phone's SD card.

Step 4 - Power off your phone.

Step 5 - Press and hold the Volume Up, Volume Down and Power buttons together until the device powers on and boots into Bootloader mode.

Step 6 - Follow the onscreen navigational instructions. Select Bootloader and then progress into CWM Recovery.

Step 7 - In CWM recovery, perform a full data wipe first. Navigate to flash zip from SD card option and hit the Power button to select it.

Step 8 - Tap the Power button once again and click choose zip from SD card.

Step 9 - Navigate to the Android 4.1.2 ROM zip file that you copied to your phone in Step 3. Use volume keys to navigate to the file and select it using the power button. Double-tap on the ROM zip file to begin installation. Confirm the ROM installation on next screen and the installation procedure should begin.

Step 10 - Once the ROM is installed, hit Go Back and tap reboot system now in the recovery menu. The phone will reboot and the first boot may take about 5 minutes to complete. So, leave it alone.

AOKP Build 5 based Android 4.1.2 Jelly Bean update is now successfully installed on your Galaxy Nexus I9250. Go to Settings > About Phoneto verify the firmware version installed.

[Source: Team Android]