How To: Manually Update Your Takju Galaxy Nexus To Android 4.2 (Build JOP40C) Jelly Bean
Nexus devices recently started receiving the Android 4.2 (build JOP40C) Jelly Bean update OTA (over the air). Previously we showed you how to manually update your Nexus 7 to Android 4.2 Jelly Bean, and we are going to do the same thing for the Takju Galaxy Nexus smartphone (bought from the Google Play Store).
It is important to keep in mind that before following this tutorial you must ensure your Galaxy Nexus is running Android 4.1.2 build JZO54K and has an unlocked bootloader. Those who aren’t rooted or don’t have an unlocked bootloader will need to wait for the OTA update.
How To Update Takju Galaxy Nexus To Android 4.2
Step 1) - The first thing you will need to do is download Android 4.2 from Google’s servers (link).
Step 2) - If you have a custom recovery you can treat this update as any other ROM or zip file. Meaning you will need to copy it to your internal SD card, reboot into recovery mode and then flash it. As for those who do not have a custom recovery, proceed to step 3.
Step 3) - Next you will need to reboot your Galaxy Nexus and hold down the VolDn button. Once you see the fastboot menu and the word start, press VolUp until you see Recovery and then press the power button to enter recovery. You will see an Android with a red exclamation point. Now press VolUp+Power together. Select the 2nd option called apply update from adb.
Step 4) - Connect your Galaxy Nexus to your computer via the USB cable.
Step 5) - Ensure that you have adb installed, if you don’t follow this guide (link). With adb installed you will need to open up command prompt in the same directory as the update you downloaded in step 1 and enter the following command:
adb sideload e587de13bf8a.signed-takju-JOP40C-from-JZO54K.e587de13.zip
Once you enter the command above Android 4.2 Jelly Bean will begin being installed to your Galaxy Nexus. Once the progress bar reaches 100% you can reboot and enjoy Android 4.2. Please drop us a line if you experience any troubles in the comments.