Thinking about getting the latest version of Jelly Bean on your Samsung Galaxy Nexus without waiting for the OTA and don't want to flash a custom version of it? There is a way possible to perform that with a tad bit of hacking and getting the Jelly Bean without the need to wait.
Note: Before we begin, note that you’ll need to be running the takju version of the Galaxy Nexus. If you're running the 4.1 preview, download the first file (see below). If you're running 4.0.4, download the second file. It is very important for you to remember that this method may work on other versions, and if you're not running this, check the forums.
What you need:
ClockworkMod recovery for the HSPA+ Galaxy Nexus
The OTA package if you are running 4.1 (direct from Google)
The OTA package if you're coming from 4.0.4 (direct from Google)
Now you'll need to find the folder where your fastboot installation resides. Place the ClockworkMod recovery image file (it has a .img file extension) in the folder with fastboot. Copy the OTA package zip file to the storage on your phone. Shut your phone off, then hold both volume up and volume down, then press power to enter the bootloader.
Here are the steps to flash Jelly Bean on your Galaxy Nexus –
Step 1: Plug your phone into a high-speed USB port on the host computer.
Step 2: Open the command line on the host computer, and browse to the folder where fatsboot and the ClockworkMod image are located.
Step 3: At the command line, you're going to tell your phone to reboot into ClockworkMod. You're not going to flash anything. If you're running windows on the host machine, type in fastboot-windows.exe boot recovery-clockwork-5.5.0.2-maguro.img .
If you're using a Mac or Linux, type in fastboot boot recovery-clockwork-5.5.0.2-maguro.img .
Step 4: Your Galaxy Nexus will reboot into ClockworkMod recovery, where you can follow the on screen instructions and flash the OTA package you downloaded and copied to the phone in the beginning of this procedure.
Step 5: When you're all done, choose to reboot your system from the ClockworkMod recovery menu. You will boot normally, into Jelly Bean, and since we didn't flash CWM, you're still 100 percent stock.
