How to Update Galaxy Nexus with Android 4.1.1 JRO03C Jelly Bean Firmware

Google has just pushed out the official Android 4.1.1 JRO03C OTA software update for the Google Galaxy Nexus and Nexus 7 tablet. Many of the developers who have a Galaxy Nexus are already using the Android 4.1 Jelly Bean update, but now you can get the official OTA which Google announced at Google I/O that it would release soon.

In this tutorial, we will tell you how to install Android 4.1.1 JRO03C OTA on Galaxy Nexus I9250 with complete steps on how to install the official update in your phone. This firmware is not completely clean ,as it has already been rooted — but you can still install it over the previous Android 4.1 JRn84D as an upgrade.

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 😉

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.

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 4.1.1 JRO03C on Galaxy Nexus GT-I9250

We have put together a detailed step-by-step instructions guide on how to install Android 4.1.1 JRO03C 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 4.1.1 (JRO03C) 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 4.1.1 JRO03C ( 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 recovery, wipe cache and dalvik cache. Then scroll down to “flash zip from SD card” and press the power button to select it.

NOTE: You can also wipe everything (data) and do a complete fresh install. Make sure you create a backup first.

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 4.1.1 firmware installed on your phone! Go to Settings >About phone to verify the build which is JRO03C.

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

Haris Nadeem
Haris Nadeem

Haris lives on everything Android; has countless devices, apps and games to play with everyday. Currently serving as the Chief Editor at Team Android. Connect on Twitter: @harisn

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One comment

  1. […] s.parentNode.insertBefore(po, s); })(); Google released the official Android 4.1.1 software update for its Nexus devices today. the latest build JRO03C offers much more stability, bug fixes and […]

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