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Nexus 7 : Upgrade to Official Jellybean 4.2.2 JDQ39 Firmware
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Nexus 7 : Upgrade to Official Jellybean 4.2.2 JDQ39 Firmware

by TDC TeamFebruary 22, 2015

Nexus 7 is one of the premium devices in the Google Nexus Series. This series is a set of smartphones and tablets which are powered by Android. Mostly, they are well-known for the automatic upgrades to newer compatible Android version. The firmware is codenamed as JDQ39 and is a version of Android jellybean 4.2.2

So here we go with our free step-by-step guide for the upgrade.

Nexus 7

Important Note: This Official Firmware for Asus Nexus 7 is taken from a very reliable developer from XDA Forum and is completely safe to install on your device.Yet we would adive you to go for this upgrade at your own risk as neither this site nor the author can be held responsible for any problem in upgradation such as bricking of Device. However, this happens only in rare cases.Also you would lose warranty of the hardware(if any) after upgrade.

To make it easier for layman users to upgrade your Asus Nexus 7, the entire upgradation process has been divided into two easy to understand parts:

  • Pre-Upgardation Steps.
  • Final Upgradation Steps.

Please follow all the steps with extra care and donot miss even a single step.

Pre-Upgradation Steps for nexus 7

  • First of all make sure that your device is Asus Nexus 7(Check at Settings> About ). Donot try to run this upgrade on any other version.
  • Also, this upgrade can only be executed on Asus tablet only.
  • We would advice the users to first take a complete backup of the existing ROM by using Nandroid Backup and Restore App.
  • Important data such as SMSContacts etc.can also be backed-up on PC or any other device .
  • Also make sure that your Asus Nexus 7 is at-least 55% charged as the upgrade will be done on the battery power.
  • Next, we would recommend to disable all the anti-virus(if any) which are running on your Device. Also uninstall the Kies package from the computer which will be used to upgrade.
  • Now th important step,enable USB Debugging on your tablet (The option available at Settings > Applications > Development > USB debugging ).
  • With this, your tablet is now ready for upgradation to Jellybean official ROM.

Final Upgradation for Nexus 7

  • First of all, download the JDQ39 Jellybean 4.2.2 Firmware Package on your Laptop/PC.
  • After the download is done, transfer the Zipped folders to the SD card using USB cable.
  • Now disconnect you device from PC/Laptop and turn it off (so that it can be started into recovery mode).
  • Now the next step requires you to download the ROM Manager app from the PLAY Store on your tablet.
  • Then open the ROM manager App in your Nexus tablet and select the option “Flash Clock Work Mod Recovery“.
  • Your device will now boot in recovery mode. If it is not, try repeating the above steps.
  • Now in the recovery mode, Select “Wipe data/factory reset” >> “Wipe Cache partition”.
  • Then select “install zip from sd card” >> “choose zip from internal sd card”.
  • Then select the zipped folder you’ve downloaded and your Tablet will start upgrading.
  • After the upgrade is completed, just restart your cellphone.

With this, you’ve successfully upgraded to Jellybam 4.2 official ROM. Enjoy your Nexus 7 with more efficiency. If you face any issues during upgradation, feel free to ask us in the form of comments below.

About The Author
TDC Team
Team TDC is the team of 6 people behind TheDroidCity. We aim at answering every query.

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