Tips & Tutorials

Root Galaxy Nexus on Android 4.1.1 JRO03C Official Firmware

HOW TO: Root Android 4.1.1 JRO03C on Galaxy Nexus GT-I9250

We have put together a detailed step-by-step instructions guide on how to root Android 4.1.1 JRO03C Jelly Bean on Galaxy Nexus. Please read the complete tutorial once before actually performing it.

Just To Remember:

  • This root method is only for Android 4.1.1 (JRO03C) installed on Galaxy Nexus (I9250, maguro) and I am not sure if it will work on the other variants of the Galaxy Nexus on other carriers.
  • 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 SDK from the Android Developers website and install. Also set it up with downloading platform-tools and USB drivers package in SDK.

Step 2 – Enable USB Debugging mode in your Galaxy Nexus.

Step 3 – Download Fastboot and extract it in android-sdk-windows\platform-tools directory. Create directory if not already there.

NOTE: Skip Steps 1, 2, 3 if you already have them.

Step 4 – Download Superuser 3.1.3 (Superuser-3.1.3-arm-signed.zip) for Galaxy Nexus on your PC, if you haven’t already.

Step 5 – Connect and mount your Galaxy Nexus USB memory on your computer using the USB cable.

Step 6 – Now copy/paste the Superuser-3.1.3-arm-signed.zip file to your SD card. Make sure the file is in the SD card root (not in any folder).

Step 7 – Then turn off your phone.

Step 8 – Download CWM 5.5.0.2 (recovery-clockwork-5.5.0.2-maguro.img) and save it to your android-sdk-windows\platform-tools directory on your computer.

Step 9 – Now go into Fastboot/Bootloader Mode on Galaxy Nexus. How? Press Volume Down + Power keys for a few seconds till you see some text on the screen. This is bootloader mode.

Step 10 – Navigate to android-sdk-windows\platform-tools directory and open Command Prompt (Shift + Right-click > Open Command Prompt).

Step 11 – Type in the following command and press Enter.

fastboot flash recovery recovery-clockwork-5.5.0.2-maguro.img

Step 12 – Once completed, choose RECOVERY from the Fastboot menu and enter Recovery Mode.

Step 13 – In ClockworkMod recovery, scroll down to “flash zip from SD card” and press the power button to select it.

Step 14 – Press the power button again and select “choose zip from sdcard”.

Step 15 –Now using your volume keys, navigate to Superuser-3.1.3-arm-signed.zip and select it using the power button. Confirm the installation on the next screen and the installation procedure should start now.

Step 16 – 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 is now rooted on Android 4.1.1 firmware installed on your phone! Check for the Superuser app in your apps list to verify.

To make sure you have correctly installed the above root method and it’s working, verify with Root Checker as given in the link.

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:

About the author

Haris Nadeem

He lives on everything Android; has countless devices, apps and games to play with everyday. Currently serving as the Chief Editor at Team Android.

7 Comments

  • In step 11,when i enter the command it says

    ‘fastboot’ is not recognised as an internal or external command,operable program or batch file.

    What do I do ?

  • Just a detail :

    Press Volume Down + Volume Up + Power keys for a few seconds till you see some text on the screen… 🙂

    Thanks for this article.

  • After step 11 i get “The program cant startbecause AdbWinApi.dll is missing from your computer. try reinstlling the program to fix this problem
    PLEASE Help me

  • hi i have a question! with this method of rooting am i going to lose all my data? i mean, my phone will get factory reset? because i read on other sites the methods their use, and it says you have to unlock your bootloader in order to root the phone..so in this post it didn’t says anything of unlocking the bootloader..so, what i’m trying to say is that i want a method of rooting my Nexus, without unlocking the bootloader, and off course dont getting the phone factory reset,,i want to root my phone, install recovery and thats it, leaving my phone exactly the same as i got it now without the root, sorry for the long question, i hope you can answer me quickly and that you understand everything i just say XD

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