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Install Official Android 4.2.1 Firmware for Nexus 7 Manually – Guide

Not a while ago, just a few weeks ago the Nexus 7 tablet received the Android 4.2 firmware that comes with impressive change log but unfortunately with one bug too, there’s no December month in the calendar app of Android 4.2. However the wait is finally over, Google is now rolling out the Android 4.2.1 firmware update for the Nexus 7 through OTA containing the firmware version JOP40D, this new update fix the December bug.

On your Nexus 7 tablet, first make sure the battery is charged, then go to Setting>About Tablet, there tap to System updates to download and install the Android 4.2.1 JOP40D OTA firmware update on Nexus 7. But if you haven’t received the OTA notification yet and can’t wait, you can install the update manually too.

The below guide shows you how to upgrade the Nexus 7 to Android 4.2.1 with official JOP40D OTA firmware update. You need a Windows PC with Android ADB drivers installed, you can follow our this guide to install Android ADB on your PC. Back up your Nexus 7 data for safety, you can sync your contacts with Gmail account and for messages use SMS apps, lastly use file expert app to backup apps.

DISCLAIMER: Please proceed the below guide at your own risk, Android Egis will not be held responsible if your device lost data or gets damaged following this guide.


Step #1: Download the Android 4.2.1 OTA Update according to your tablet variant to your computer:

Step #2: Download the Fastboot Package to your PC.

Step #3: Unzip the downloaded file into C:\ (C drive in my computer) to generate the fastboot folder that contains four files. Then copy the downloaded update zip file to the fastboot folder.

Step #4: Turn off your Nexus 7 tablet.

Step #5: Reboot your phone into recovery mode, to do so reboot phone by holding down volume down and power buttons until device turns on, then use volume keys to navigate and power button to select. You need to select recovery option to enter in recovery mode. There you’ll see Android logo, then hold down power button, then press volume up button, it will open up recovery menu. Then select “apply update from adb”.

Step #6: Connect your Nexus 7 to PC using a USB cable.

Step #7: Open up the command prompt that you can find  at start menu>programs>accessories. Then using command prompt, navigate to the fastboot folder, if you’re using Windows 7 or above, you can open the command prompt directly from the folder, to do so open the folder, there press right click on mouse while holding down shift button on keyboard, then select “open command prompt here”. Or enter the below command on command prompt to navigate to fastboot folder.

cd c:\ fastboot

Step #8: Enter following command, it will deliver your Nexus 7 ID number, if it delivers, your phone is connected to PC properly. Otherwise make sure device drivers are installed properly.

adb devices

Step #9: Enter the following command to install the downloaded Android 4.2.1 OTA update .zip file, it will show progress bar on Nexus 7 tablet, after that it will start the installation:

For Nexus 7 Wi-Fi Only (nakasi):

For Nexus 7 Wi-Fi/3G (nakasig)

Step #10: Once the installation is done, on your phone select “reboot system now” to reboot the tablet.

That’s it, your Nexus 7 tablet is now running the Android 4.2.1 version, enjoy!


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