• Unlock Root +, which allows to obtain the release of the bootloader and gain root permissions.
• Unroot + OEM Lock, which allows you to bring the smartphone to the stock version, eliminating the root or “re-lock” the bootloader.

One click solution toolkit features:
Drivers + SDK

• install the latest samsung drivers
• extract the latest android SDK to your %HOMEDRIVE% …along with the other necessary files for unlocking, rooting, flashing back to stock, and re-locking
• Update your systems “Path” environmental variable to include adb and fastboot locations

Unlock + Root

• Help you configure drivers when your phone enters bootloader mode for the first time
• Unlock your device
• Push su.zip (Superuser.apk) to your sdcard
• Flash clockwork mod
• Provide on screen instructions for completing the rooting procedure

Unroot + OEM Lock

• Flash all stock componets to bring your phone back to a factory state
• OEM lock your device: used to relock your gnex

Steps to Unlock / Lock Bootloader, Root / Unroot Verizon Galaxy Nexus version in One-Click using Root Toolkit:

DISCLAIMER: Mobile Geeky will not be held responsible if you lose data or your device gets damaged in the following of this guide. Proceed at your own risk.

1. Download Wug’s Galaxy Nexus Root Toolkit (GnexRootToolkit.sfx.exe) [Mirror1] [Mirror2]
2. Extract the downloaded file and launch Galaxy Nexus Root Toolkit.
3. Click on Drivers + SDK to install the latest device drivers and the Android Software Development Kit which is required for unlocking and rooting process.
4. Connect your Galaxy Nexus via USB.
5. Simply click on the Unlock + Root button and follow the on-screen instructions. It will unlock your device’s bootloader, root, install SuperUser and flash ClockworkMod Recovery.

More information: Galaxy Nexus Forum – Wug’s Galaxy Nexus Root Toolkit

Device features

• Optimized Mobile Hotspot when used with VPN.
• Optimized 3G/4G data sessions for faster response times.
• Fixed an incorrect notification that “data was disconnected due to roaming”.
• WiFi now automatically reconnects when returning to a known Access Point.
• Improvements to special visual effects feature when using front-facing camcorder.
• Visual improvements to the lock screen.

Email and Messaging

• Fixed an issue where some email attachments would not open correctly.

Apps and Widgets

• DivX support has been removed and will be supported in a future upgrade.
• Improved audio volume in Google navigation turn-by-turn directions.

With this in mind, now is the time to see whether your device is ready to benefit from the new update. This walkthrough will explain the step to flash the new Android 4.0.2 on your device and also lets you unlock the bootloader and root your device.

The easy way to unlock/lock Bootloader, root/unroot the Verizon Galaxy Nexus in One-Click, please check out “How to easily unlock / lock Bootloader, root / unroot Verizon Galaxy Nexus in One-Click“.

Step for install Android 4.0.2 with unlock bootloader, root and CWM to Galaxy Nexus:

DISCLAIMER: Mobile Geeky will not be held responsible if you lose data or your device gets damaged in the following of this guide. Proceed at your own risk.

Software and Hardware Requires:

The GSM Galaxy Nexus.
Android SDK installed on your computer, download here
Google Android 4.0.2 (Factory Image) from Google.
CF-Root 5.1 kernel for Android 4.0.2 (ICL53F) from XDA developers.

Step for flash new Android 4.0.2 factory image on the Galaxy Nexus

1. Setup the Android SDK:

• [Computer] Install Android SDK with “Run as administrator”.
• [Computer] Launch Android SDK Manager and select Android SDK Platform-tools and click install.
• [Computer] Set your PATH variable by click right on Computer and select Properties.
• [Computer] In the window that opens, select “Advanced system settings”, and select “Environment Variables”.
• [Computer] Another window will open, in the bottom text box select “Path” and click the button labeled “Edit…”
• [Computer] You’ll see a new dialog where you can enter text. Navigate to the end of the existing text, and enter the following exactly as written:
  ;C:\Program Files (x86)\Android\android-sdk\platform-tools;C:\Program Files (x86)\Android\android-sdk\tools;C:\Program Files (x86)\Android\android-sdk
• [Computer] Click “OK”, “OK” and “OK”.

2. Flash the GSM Galaxy Nexus to Android 4.0.2 factory image:

• [Computer] Extract the Android 4.0.2 factory image into whichever directory you have fastboot (C:\Program Files (x86)\Android\android-sdk\platform-tools).
• [Galaxy Nexus] Reboot your device into fastboot mode (press and hold both Volume Up and Volume Down, then press and hold Power).
• [Galaxy Nexus] Plug your device into your computer with the USB cable.
• [Computer] Wait until any drivers successful installed.
• [Computer] Open the Windows command prompt and and type:
  cd \Program Files (x86)\Android\android-sdk\platform-tools\
• [Computer] Then typing the following command to flash the new Android 4.0.2 factory image into your Galaxy Nexus.
  fastboot flashall

  OR

   fastboot flash bootloader bootloader-maguro-XXXXXX.img
  fastboot reboot-bootloader
  (wait for bootloader to reboot)
  fastboot flash radio radio-maguro-XXXXXX.img
  fastboot reboot-bootloader
  (wait for bootloader to reboot)
  fastboot update image-yakju-XXXXXX.zip
• After this steps, you phone should reboot with 4.0.2.

3. Unlock Bootloader for install Clockworkmod recovery.

• Backup your data.
• [Galaxy Nexus] Reboot your device into fastboot mode (press and hold both Volume Up and Volume Down, then press and hold Power).
• [Galaxy Nexus] When the phone reboots to fastboot mode. Plug your device into your computer with the USB cable.
• [Computer] Open the Windows command prompt and and type:
  cd \Program Files (x86)\Android\android-sdk\platform-tools\
• [Computer] And enter the following:
  fastboot oem unlock
• [Computer] You will see a screen that explains the pros and cons of unlocking it, and warns you that “ALL DATA WILL BE ERASED“.
• [Computer] Choose Yes to ERASE ALL DATA and unlock the bootloader.

4. Root the Galaxy Nexus.

• [Computer] Extract the CF-Root 5.1 kernel for Android 4.0.2.
• [Computer] Copy boot.img (CF-Root 5.1 kernel) into whichever directory you have fastboot (C:\Program Files (x86)\Android\android-sdk\platform-tools).
• [Galaxy Nexus] Reboot your device into fastboot mode (press and hold both Volume Up and Volume Down, then press and hold Power).
• [Galaxy Nexus] When the phone reboots to fastboot mode. Plug your device into your computer with the USB cable.
• [Computer] Open the Windows command prompt and and type:
  cd \Program Files (x86)\Android\android-sdk\platform-tools\
• [Computer] enter the following:
  fastboot flash boot boot.img
• [Galaxy Nexus] Reboot your device, after that you will see the “Super User” app in menu.
  

5. Install ClockWorkmod recovery

• [Galaxy Nexus] Go to Market.
• [Galaxy Nexus] Search the free ROM Manager app and install.
• [Galaxy Nexus] Launch the ROM Manager and select flash clockworkmod recovery, then select the device model.
  

If you picked up a Verizon Galaxy Nexus, you probably got an over the air update to Android Ice Cream Sandwich 4.0.2 almost immediately. The update file is approximately 10.7 megabytes, and installs in about five minutes. The update of GSM model brings the same changes as the one on the LTE version and is 8.7MB in size. So, you can update by check Settings> About phone > System updates and update it. The other way, you can manually update Android 4.0.2 OTA to your GSM Galaxy Nexus by following below:

This is step for manually update the GSM Galaxy Nexus to Android 4.0.2 using OTA package. For full flash/install Android 4.0.2 (Factory Image), check out the Install Android 4.0.2 with unlock bootloader, root and CWM to Galaxy Nexus page.

DISCLAIMER: Mobile Geeky will not be held responsible if you lose data or your device gets damaged in the following of this guide. Proceed at your own risk.

Software and Hardware Requires:

• The GSM Galaxy Nexus must codename ‘yakju’ NOT the Verizon Galaxy Nexus, or ‘yakjuxw’, or ‘yakjusc’ or any of the other variants.
• Android SDK installed on your computer, download here
• The latest ClockWorkmod recovery image (download).
• Google Android 4.0.2 update from Google.

Step for update Android 4.0.2 OTA on GSM Galaxy Nexus

1. Setup the Android SDK:

• [Computer] Install Android SDK with “Run as administrator” and launch Android SDK Manager.
• [Computer] Select Android SDK Platform-tools and click install.
  
• [Computer] Set your PATH variable by click right on Computer and select Properties.
• [Computer] In the window that opens, select “Advanced system settings”, and select “Environment Variables”.
• [Computer] Another window will open, in the bottom text box select “Path” and click the button labeled “Edit…”
• [Computer] You’ll see a new dialog where you can enter text. Navigate to the end of the existing text, and enter the following exactly as written:
  ;C:\Program Files (x86)\Android\android-sdk\platform-tools;C:\Program Files (x86)\Android\android-sdk\tools;C:\Program Files (x86)\Android\android-sdk
• [Computer] Click “OK”, “OK” and “OK”.

2. Unlock bootloader for your GSM Galaxy Nexus:

• Backup your data.
• [Galaxy Nexus] Shut off the phone.
• [Galaxy Nexus] Press and hold both Volume Up and Volume Down, then press and hold Power.
• [Galaxy Nexus] When the phone reboots to fastboot mode. You’ll see an Android robot with his front panel open. Check to see that the text below it starts with “FASTBOOT MODE” in red.
• [Galaxy Nexus] Plug your device into your computer with the USB cable.
• [Computer] Wait until any drivers successful installed.
• [Computer] Open the Windows command prompt and and type:
  cd \Program Files (x86)\Android\android-sdk\platform-tools\
• enter the following:
  fastboot oem unlock
• [Computer] You will see a screen that explains the pros and cons of unlocking it, and warns you that “ALL DATA WILL BE ERASED“.
• [Computer] Choose Yes to ERASE ALL DATA and unlock the bootloader.

3. Update the GSM Galaxy Nexus to Android 4.0.2

• [Galaxy Nexus] Plug your device into your computer with the USB cable.
• [Computer] Copy the Android 4.0.2 OTA to the root directory of sdcard on your Galaxy Nexus.
• [Computer] Copy the ClockworkMod image file to in the “\Program Files (x86)\Android\android-sdk\platform-tools\”. Rename the ClockworkMod file to cwm.img.
• [Galaxy Nexus] Reboot your device to bootloader mode by press and hold volume-up and volume-down, then press and hold Power.
• [Computer] Open a command prompt and type:
  cd \Program Files (x86)\Android\android-sdk\platform-tools\
• [Computer] Type the following command to unlock the Galaxy Nexus:
  fastboot.exe boot cwm.img
• [Galaxy Nexus] Use the ClockWorkMod recovery menu to flash a zip file from the SD card, and choose the Android 4.0.2 OTA zip.
• Wait until it finishes.