The Cyanogenmod 9 is now supported on the Galaxy Nexus smartphone and this guide will help you install the latest CM9 Nightly custom build for the Gnex device.

This build is an unofficial release created by 'swordrune10', an xda modder, and he will continue to release updates to CM9 nightlies until the cyanogenmmod team makes them official. The instructions you'll find in this post can be applied only on the GSM models of Galaxy Nexus, while the Verizon CDMA models are unsupported. He decided to create a working custom ROM out of the CM9 Nightly for Galaxy Nexus because its developers are rarely upgrading the nightlies and numerous users have complained about this fact. Remember that you should only apply the steps in this if your device is International GSM edition. Please note that we cannot be held responsible for any problems or errors your phone might show after the installation is complete.

Before you start to flash CM9 on your Galaxy Nexus, you need to read the info listed under the preparation guide below:

  •  the only device support by this tutorial guide is the Galaxy Nexus GSM model number i9250. Do not attempt to install it on any other smartphone model as it won't work or it will brick it.
  • backup your important pictures, videos, audio and other files by transferring them on your computer or on the phone's internal SD Card, as that will be the only storage part that will be left unaffected by the custom ROM installation.
  • Sync your Contacts with your Gmail account. If you don't know how, then read the instructions in this article.
  • Sms and Call Logs can also be saved by using the SMS Backup & Restore and Call Logs Backup & Restore applications.
  • Enable the USB Debugging mode.
  • Save the APN and MMS Settings.
  • it is recommended that your phone's battery levels should be over 75% so that it won't power OFF during the update.
  • Read the entire tutorial guide and do not event hink about skipping any steps because that might result in files corrupted and the CM9 unofficial build won't be successfully applied.
  • make sure that your phone has CWM recovery and fastboot installed.

Now that you've read all of the above, it is time to start installing the CM9 custom ROM on your Galaxy Nexus. Remember that you need to respect all the steps below and, in case you can't seem to figure out how to apply them then you ask for help in comments.

How to install Cyanogenmod 9 unofficial by 'swordrune10' on your Galaxy Nexus I9250:

  1. Download the CM9 zip file from here.
  2. Download the Google Apps zip file from here. This file will add the Gmail, Market, Calendar and all the other Android based Google applications on your device.
  3. After you've downloaded the files above, proceed and move them on your phone's SD card.
  4. Disconnect the phone from your PC and then power off the Gnex. Move to the next step.
  5. Now that the phone is OFF you need to boot it into CWM recovery. Do it by pressing and holding Power, Volume Up and Volume Down buttons at the same time. Fastboot will launch and from its menu select 'recovery mode' and press Power key to boot into CWM recovery.
  6. Now, from recovery menu select 'wipe data/ factory reset' and confirm its actions. Wait until the data has been successfully wiped, then select 'wipe cache' and when it is complete move to the next step.
  7. Select 'install zip from sd card' and then 'choose zip from sdcard'. Browse till you find the CM9 zip file and select it. Now confirm the installation and wait until the new ROM is successfully installed.
  8. When the CM9 rom has been installed you need to go back to the main recovery screen and select 'install zip from sd card' and then browse for the Google apps zip. Allow it to install and then wait until all the apps have been installed.
  9. Now that all the zips have been installed you can restart the Galaxy Nexus and then it will boot for the first time in the new CM9 firmware. That's it, your phone's ROM has been installed and you are free to start customizing it to best suit your needs.

For any other questions you should use the comments to ask for help. I hope that you found this guide helpful or, if you found this guide by mistake and you were hoping to find another guide then you should use our search box to find whatever 'how-to' guide you were looking in the first place.

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