AlienDroid is based on the Android 4.2 QAOSP ROM and it has been released on the XDA forums. Read the entire post and you should be able to flash the in under five minutes. This is a guide for a Galaxy Nexus power user who wants to test as many ROMs as possible.
This custom ROM is based on AOSP Android 4.2 and CM10 nightly. It is a fast ROM and its main features are the Beats Audio, Sony Walkman Player and Mega Bass Beats. Other features are the Optimized Skyrim kernel, the Sony Bravia Engine, a theme manager, Optimized Android animation, PGM support, Android 4.2 Wallpapers, Android 4.2 Keyboards, Gapps are included and you can also set Custom Softkey Icons etc.
To correctly flash this new AlienDroid JB custom ROM on your phone, read the guidelines below first:
Use this tutorial only with the Verizon variant of Samsung Galaxy Nexus I515. Do not attempt to install the files you find here on a different variant of Galaxy Nexus phone. Check the phone model in the About device menu.
Your phone should be on unlocked bootloader, it has to be rooted and running a custom recovery image such as TWRP or CWM.
Use the custom recovery mode to create a full NANDROID backup of your current ROM. This will set a restore point for your device and it can be used in case your device is unable to boot after installing AlienDroid ROM.
Charge your phone’s battery until it reaches at least 50% power level so that the device won’t power off while you’re trying to flash the new custom ROM.
This is a guide for users who want to test custom Jelly Bean ROMs and you shouldn’t blame us in case you lose any data in the process.
Note that the tutorial will ask you to ‘wipe data and factory reset’ the device. This will delete all the files stored in the /system partition, which means that the applications, SMS etc will be removed while the contents of the internal SD card will remain intact.
If you have any problems completing the installation, ask for more help in comments.
These were all the extra instructions that you had to go over before moving to the tutorial guide below. Don’t skip any steps listed below.
How to install AlienDroid JB custom ROM on Verizon Samsung Galaxy Nexus I515:
Download the custom ROM from HERE. Don’t extract the contents of this zip; save the file on your PC desktop.
Connect the smartphone to your PC and then move the AlienDroid ROM zip on its internal SDcard. Disconnect the phone from computer when the file is copied.
Power off your Galaxy Nexus device.
Next, boot it into CWM Recovery mode. (It works also with TWRP Recovery). To boot into custom recovery you need to press Volume Up, Volume Down and Power which will load the Fastboot mode and then you have to select ‘Recovery’ option. Get to the next step when the main Recovery menu appears.
You can create a full NANDROID backup of your current ROM by selecting ‘backup and restore’ option. NOTE: If you already have such file then you can skip this step.
Now you need to select ‘wipe data/ factory reset’. Confirm this process.
Now you can install the ROM by selecting ‘install zip from sdcard’. After that select ‘choose zip from internal SD card’ and then find the AlienDroid custom ROM zip file. Confirm the installation.
Wait until the ROM installs and when that happens you have to return to the main Recovery screen.
Select ‘reboot system now’.
The first boot process of AlienDroid JB ROM will take at least 3-4 minutes to complete. Wait until the home screen appears and then you can enter your Google Account details.
Take control over your device and then begin testing all its new features. Tell us in comments if you like how the new AlienDroid Android 4.2 custom ROM runs on your Verizon Samsung Galaxy Nexus device.
NOTE: If the first boot process takes too long to complete, then you will have to power off the device completely. After that you need to repeat the entire tutorial starting with step 4 and this time you make sure that you wipe the data and factory reset the device. Some custom ROMs won’t install at the first attempt and you might need to try several times before it installs.
Any extra questions that you might have should be posted in the comments section, at the end of this post.