Install Android 4.1.1 Jelly Bean JRO03C Custom ROM on Galaxy Nexus

• Last modified: Android Tips

A number of Android phones have received the custom firmware ROM of Android 4.1.1 Jelly Bean, after the initial roll out for the Galaxy Nexus. Developers have been porting the Android 4.1.1 JRO03C 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 4.1.1 JRO03C firmware update can be installed on the Galaxy Nexus like any other custom ROM. In this tutorial, we will tell you how you can update Galaxy Nexus to Android 4.1.1 on this custom firmware. 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 ;-)

Features of this custom firmware:

  • Rebuilt, compressed and optimised with the MCR build system
  • Based on the 4.1.1 / JRO03C release
  • Added initial support for contact sync via the Facebook app. Further enhancements to follow, but basically functionality should now be working
  • EFS auto-backup script
  • ‘TweakDeck’, Galaxy Nexus optimised Tweetdeck
  • All Google components are running the latest
  • SuperSU from ChainfireXDA
  • SQLite performance patch
  • Not odexed
  • Insecure boot image
  • Secure boot image
  • Secure boot image with patched ADB
  • Launcher with rotate support
  • Nova Launcher as default launcher (courtesy of teslacoil software)
  • Apex Launcher a secondary option (I now use this because of it’s vertical scroll support)
  • Tesla LED (courtesy of teslacoil software)
  • Alternative appstores (Amazon, GetJar patched for maximum compatability and SlideMe Market)
  • Trackball Alert Pro compatibility
  • Alernative UI options (clickable when hidden menu keys with alternate locations, search button)
  • Our own ‘OdexMe’ on-demand odex application
  • Enhanced Power Menu by djmcnz (updated for JB)
  • ClockworkMod ROM Manager
  • Disabled menu key unlock
  • init.d support on boot
  • Titanium Backup
  • Disable camera shutter sound
  • XXLF1 baseband
  • Much much much more!

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 4.1.1 custom ROM update.