Android 4.2.1 OTA update for “yakju” Galaxy Nexus is out
The unlocked International Galaxy Nexus, or the yakju build as it is monikered, has already been updated to Android 4.2 a few days ago. An incremental update which fixed the pesky December bug and fixed Bluetooth Audio issues in Jelly Bean 4.2 was pushed out by Google a couple of days ago to the Nexus 4, Nexus 10, Nexus 7 and the takju (U.S Play Store) version of the Galaxy Nexus.
We now have confirmation that the yakju version or the International unlocked GSM Galaxy Nexus has also started receiving the OTA update to Android 4.2.1. Android 4.2.1 is a minor bug fix update (only ~1MB in size) that mainly focuses on fixing the issue of December missing from the calendar in the People app, along with Bluetooth instability issues. It doesn’t unfortunately fix the reboots, battery drainage, and performance issues some users have been experiencing, so some might be disappointed by that, though disabling background sync in the Currents app has been known to help with lag.
If you haven’t received the OTA notification yet, you can always manually download it and update your device to Android 4.2.1. With just a couple of days left for December to start, it might be a good idea to do so, so that you don’t miss out on any important events that you need to add for next month. As always we have put together a handy guide to help you update your device manually.
NOTE: This update can be installed only on the unlocked International GSM, aka “yakju” variant of the Galaxy Nexus, and you’ll need to be on a stock (unrooted) Android 4.2 with build number JOP40C to be able to update. Check the build number in Settings » About phone before proceeding
To check whether you have the yakju variant or not, download the Android System Info app from the Play Store, open it, click the “System” button on top, expand “BuildInfos”, then check what it says in front of “Product”. If it’s not yakju, do not proceed.
How to Install Android 4.2.1 Update on Galaxy Nexus (yakju)
- First, make sure you have the drivers installed for the phone on the computer. Get them → here if you don’t have them installed already.
- Download the OTA update file.
Download Link | Filename: 5f67f5ca4720.signed-yakju-JOP40D-from-JOP40C.5f67f5ca.zip
- Download Fastboot, which includes the adb files needed for flashing the update.
Download Fastboot | Filename: Fastboot.zip
- Extract the Fastboot.zip file on your computer to get a folder named Fastboot with four files inside it. To keep things easy, extract the Fastboot folder to drive C.
- Then, copy the update file downloaded in step 2 to this “Fastboot” folder you just obtained.
- Turn off the phone, then boot it into stock recovery. To do so, first boot into the bootloader mode by holding down the Vol Up + Vol Down + Power buttons together till the screen turns on. Then, using the volume buttons, scroll till you see the “Start” text change to “Recovery mode”, then select it using the power button to boot into stock recovery.
- You will then see an Android with a red exclamation point. Now hold down the Power button then press the Volume Up key to see the recovery menu.
- Select the apply update from adb option in recovery, by scrolling to it using the volume buttons and selecting it with the power button.
- Connect the phone to the computer. Wait for the drivers to finish installing.
- On the computer, click on Start menu » All Programs » Accessories, right-click on Command Prompt and click on Run as administrator. If you are using Windows 8, this can be done by right-clicking on the extreme bottom left corner of the taskbar, then selecting “Command Prompt (admin)”.
- Now, perform the following steps in the command prompt to flash the Android 4.2.1 update:
- Navigate to the Fastboot folder which you obtained in step 6. For example, if the Fastboot folder is in drive C on your computer, enter cd C:\Fastboot in command prompt (and press Enter) to navigate to the folder.
- Then, enter adb devices. If your Galaxy Nexus has been detected properly, you will see a device ID show up in command prompt. If nothing comes up, make sure you have installed the drivers (step 1).
- Finally, to flash the update, enter the following command:
adb sideload 5f67f5ca4720.signed-yakju-JOP40D-from-JOP40C.5f67f5ca.zip
- After you enter the above command, you will see the “sending: sideload” message in the command prompt, and once it reaches 100%, the update will start installing on your phone.
- After the update finishes installing, select reboot system now on the phone to reboot it and boot up into Android 4.2.1.
You are now running Android 4.2.1 on your yakju Galaxy Nexus, and can go ahead and add all of those upcoming events and birthdays for December right away.