Install Android 4.1 JB Custom ROM on Galaxy Nexus

• Last modified: Android Tips

The only device that has been able to try out and install Android 4.1 Jelly Bean is the Galaxy Nexus. Android 4.1 Jelly Bean (JRN84D) ROM has been available since earlier today and has been doing the rounds all over the Internet. Developers have been porting the Android 4.1 to various Android phones and are also taking out useful bits and apps from the ROM to make them compatible with the Android 4.0 ROMs.

Android 4.1 firmware update can be installed on the Galaxy Nexus like any other custom ROM. We have chosen the best custom ROM which is clean, super fast and optimized for the Galaxy Nexus that you can use on the phone. Read below for the entire tutorial.

Disclaimer: All the tools, mods or ROMs mentioned below belong to their respective owners/developers. We (TeamAndroid.com) 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 ;-)

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 your phone to the latest Android 4.1 custom ROM update.

HOW TO: Install Android 4.1 ROM on Galaxy Nexus GT-I9250

We have put together a detailed step-by-step instructions guide on how to install Android 4.1 Jelly Bean on Galaxy Nexus. If you are used to installing custom ROMs on your Galaxy Nexus, then this should not be any different for you. However, for beginners, you need to root your Galaxy Nexus and install a custom recovery. Please Google that up if you are unsure.

Just To Remember:

  • This Android 4.1 (JRN84D) is only for Galaxy Nexus (I9250, maguro) and I am not sure if it will work on the other variants of the Galaxy Nexus on other carriers.
  • My phone had CyanogenMod recovery installed. Please make sure you have this recovery!
  • Make a Nandroid backup of your previous phone set up before proceeding – for just in case anything goes wrong.

Complete Step-By-Step Instructions:

Step 1 - Download Android 4.1 JRN84D for Galaxy Nexus on your PC, if you haven’t already.

Step 2 - Connect and mount your Galaxy Nexus USB memory on your computer using the USB cable.

Step 3 - Now copy/paste the ROM zip file to your SD card. Make sure the file is in the SD card root.

Step 4 - Then turn off your phone.

Step 5 - Now to get in the bootloader mode. Turn on the phone while pressing and holding the Volume Up + Volume Down and Power buttons.

Step 6 - Follow the navigation instructions on the screen. Select BOOTLOADER and then go to RECOVERY.

Step 7 - In ClockworkMod (CyanogenMod) recovery, scroll down to “flash zip from SD card” and press the power button to select it.

Step 8 - Press the power button again and select “choose zip from sdcard”.

Step 9 -Now using your volume keys, navigate to ROM zip and select it using the power button. Confirm the installation on the next screen and the installation procedure should start now.

Step 10 - After the installation completes, go to “+++++Go Back” and reboot the phone by selecting “reboot system now” from the recovery menu. The phone will boot now and it might take about 5 minutes to boot on your first time. So, please wait.

That’s it! Your Galaxy Nexus should have Android 4.1 firmware installed on your phone! Go to Settings >About phone to verify.

Have fun playing with it! If you have any issues, please fire them up in the comments below!

If you’re still not interested in trying out Jelly Bean (Android 4.1) on your phone, try some alternatives: