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Update Verizon Galaxy Nexus with rooted JRO03O Jelly Bean 4.1.1 Firmware

Verizon Galaxy Nexus updated with rooted JRO03O Jelly Bean 4.1.1 Firmware

The Verizon Galaxy Nexus has just received a brand new update of the Jelly Bean 4.1.1 and with help from the XDA Recognized Developer called ‘mwalt2’ who managed to create a rooted build of the JRO03O firmware. Along with the rooted ROM you will be able to install the Extended Power Menu and another surprise would be that the ROM is modded for Tethering.

Use all the instructions that I have listed in this article and you will eventually manage to flash this new rooted Android 4.1.1 JB firmware. This ROM is stock and it is an unofficial update, which means that it wasn’t launched by Verizon / Google. This is an already rooted ROM and this means that you won’t need to root the phone after installing it, as already is offering root access. However, your phone needs to be on an unlocked bootloader and rooted.

Now, the extended power menu is a function / mod that you can installed and offer your phone the possibility to reboot, hot reboot, reboot into recovery mode and reboot into bootloader mode from the Verizon Galaxy Nexus UI. The ‘tethering mod’ will bring support for native tethering, feature that isn’t usually active with the stock carrier firmware. You will find both mods files in the tutorial guide.

These are all the general instructions that you had to read before moving to the preparation guide. Read the info below and you’ll learn what steps you have to take in order to correctly configure your device for the installation of the JRO03O rooted firmware. Here’s what you need to know:

  • Install this rooted unofficial rooted and stock 4.1.1 Jelly Bean ROM only on the Verizon variant of the Galaxy Nexus. Do not attempt to flash this ROM on any other devices that are running on Android, as it won’t work and you might end up bricking that device.
  • Your phone should be on an unlocked bootloader, it should be rooted and running a CWM Recovery image. Without these you won’t be able to flash this rooted firmware based on Jelly Bean 4.1.1. You can continue with the rest of this article’s steps only if your phone meets these requirements.
  • Create a full Nandroid backup of your currently installed ROM. This serves as a backup in case you don’t like the new update or in case the update doesn’t install correctly and you will be forced to restore a working backup in order to boot normally.
  • Move all the video, audio, bookmarks and other files, that are important to you, on your phone’s internal SDcard. Also, if you want to backup a list of installed apps, the Call Logs info, SMS and the APN Internet settings then you should be better using these tools for Android smartphones: AppBAK for Android apps backup | SMS backup & restore | Call Logs backup & restore | APN Settings Backup & Restore. Note that all these apps are working solely with rooted phones.
  • The phone contacts need to be synced with your Gmail account, as the installation of the custom ROM will wipe all the data from the system’s memory.
  • Now you need to enable the USB debugging option from the Settings > Development menu.
  • Remember to charge the phone’s battery so that it won’t power off while you’re installing the ROM files.
  • Apply this tutorial only if you’re sure that you can use CWM recovery and that you know how to flash such files.
  • We wont be held responsible in case you brick the phone. In case you hit any roadblocks, you should use the comments section and post a detailed info of the steps you took and where you got stuck while trying to flash the rooted JRO03O firmware file.

These are all the general instructions that I had for you and now you should move to the tutorial. Make sure that you don’t skip any steps listed in the ‘how-to’ guide, as that will result in a failed attempt of updating your Verizon Galaxy Nexus firmware.

How to install rooted JRO03O Jelly Bean 4.1.1 Firmware on Verizon Galaxy Nexus

  1. Download the JRO03O rooted firmware zip from HERE. Save the file on your PC desktop screen. Do not extract its contents.
  2. Download the Bootloader and Radio zip file HERE. These file is needed in order to keep the bootloader unlocked.
  3. Next download the Extended Power Menu file from HERE, and, also you should download the ‘tethering mod’ zip file from HERE. This step is optional and you should download the files only if you wish to get these mods on your phone.
  4. After the download of all files is complete you should connect the phone to your PC via USB cable. Move all files on the Verizon Galaxy Nexus internal SDcard. After you transfer all files successfully, you have to unplug the phone from PC and then power it OFF as we need to boot into CWM Recovery.
  5. Boot into ClockworkMod Recovery mode by holding simultaneously ‘power’ + ‘volume up” + ‘volume down’ buttons. This will load the ‘fastboot’ mode and you need to select the ‘Recovery’ mode option. Select it by pressing on the ‘Power’ button and then wait for the phone to load all the files it needs.
  6. When you’re at the CWM Recovery main menu you can select the ‘;backup and restore’ option to create a full Nandroid backup of your existing ROM. However, if you already made such backup, then you can skip this step.
  7. Now you have to select ‘wipe data/ factory reset’ option and then confirm the process.
  8. Next, select ‘install zip from sdcard’ and from the new menu select ‘choose zip from sdcard’. Find the JRO03O rooted firmware zip file and complete its installation.
  9. After you install the ROM you will need to flash the ‘bootloader and radio’ zip file. You need to install it just like you did with the ROM. Confirm this file’s installation and then move to the next step.
  10. Now, if you downloaded the mod files, the ones at step 3, then you should repeat step 8 and install the files one after the other. In case you didn’t download the mods, then you can skip the step.
  11. Return to the main recovery menu and select ‘reboot system now’. Wait for your phone to restart and load normally into this new ROM. Note that this first boot process will take at least 5 minutes to complete and you should wait for it to load all the files.
  12. When the Verizon Galaxy Nexus boot successfully into JRO03O firmware you can start testing this new release of Jelly Bean 4.1.1. Remember that this is an already rooted firmware and you won’t need to re-root the phone.

In case the first boot process with this new firmware takes too long, over 15 minutes, then you should power off the device and then boot again into CWM recovery mode. Repeat the entire tutorial once again and you will eventually manage to flash the new ROM.

If you still cannot complete the update, then you should ask for our help by leaving at the end of this post.