Tips & Tutorials

Update Galaxy Nexus I9250 to Android 4.1.2 JZO54K Jelly Bean AOSP Firmware

Yesterday, Google rolled out the official Android 4.1.2 JZO54K software update for Nexus 7 and we are expecting the same update will be rolling out to Galaxy Nexus I9250 soon as well. Thanks to the developers community, they have managed to compile the latest available Android Open Source Project (AOSP) code Android-4.1.2_r1, the build ID is JZO54K (Android 4.1.2) for Galaxy Nexus. You can update Galaxy Nexus I9250 to Android 4.1.2 JZO54K Jelly Bean AOSP firmware from the tutorial below. Your Galaxy Nexus should have ClockworkMod recovery installed.

In this tutorial, we will tell you how to install Android 4.1.2 JZO54K Jelly Bean AOSP custom ROM on Galaxy Nexus I9250 with complete steps and instructions on how to backup your phone. Remember, this is not an official OTA software update. This is a custom ROM, based on AOSP release of the Android 4.1.2 Jelly Bean and is rooted. Let’s get on with the tutorial now.

Disclaimer: All the tools, mods or ROMs mentioned below belong to their respective owners/developers. We ( or the developers are not to be held responsible if you damage or brick your device. We don’t have you on gun point to try out this tutorial 😉

Android 4.1.2 JZO54K Jelly Bean AOSP Features:

  • Pure AOSP based on Android 4.1.2 JZO54K
  • Added SuperSU v0.96
  • Added BusyBox v1.20.2
  • Added Flash Player

Make sure you have installed all your USB drivers for the Samsung Galaxy Nexus to connect it with the computer. Download Samsung Galaxy Nexus USB drivers! Apart from just the USB drivers, there are a few more things that you need to take care of.

1. You need to enable USB debugging mode. This helps to connect your Android phone with the PC. See here: How to Enable USB Debugging.

2. Your phone battery should be 80-85% charged. If your phone goes off suddenly because of battery, during flashing ROMs or installing mods and updates — your phone might go dead permanently. See here: How to Check Battery Percentage.

3. Backup all your important data that you might need as soon as your flash a new ROM, or make a backup for just in case, you never know when anything might go wrong. See below on how to backup data:

4. Your phone should be factory unlocked. Additional instructions for locked Android devices will be added in the tutorial for unlocking devices.

Now, let’s proceed with the tutorial on the next page and update Galaxy Nexus I9250 to Android 4.1.2 JZO54K Jelly Bean AOSP ROM.