Update Google Nexus 7 to Official stock Android 4.2.2 JDQ39 firmware

Nexus 7 updated to Android 4.2.2 JDQ39 Firmware

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Nexus 7 tablet can be updated to the latest Android 4.2.2 JDQ39 firmware. In order to do that you will have to read this entire post and make sure that you won’t skip any steps in the process. It is a guide for advanced users, but you should be able to complete the installation even if you’re a novice.

The Android 4.2.2 JDQ39 firmware update has been pushed to Android devices worldwide. The Nexus 7 will have its performance improved and other stability tweaks added so that you’ll get the best Android experience. In order to make sure that you apply the update at your first attempt, you will need to read the preparation guide below:

  • Use this tutorial only with the Google Nexus 7 tablet. It won’t work with any other smartphones and you shouldn’t even attempt to flash this update files on other devices.
  • Your Nexus 7 device should be on the Android 4.2.1 JOP40D firmware. You can’t upgrade if you’re on an older version.
  • Backup all your data by moving it on your device’s internal SDcard. This will protect your files against deletion. Alternatively, you can choose to move all your data on to your computer and after the update is complete you can restore it back to your device.
  • Enable the USB Debugging option from your tablet’s Android Developer Options. NOTE: If the Developer Options aren’t listed in the Settings menu, then you will need to tap 7 times on the ‘Build Number’ section. Google decided to hide the Developer Options when they moved to Android 4.2 JB ROM.
  • Disable all the antivirus applications from your computer. Such apps are usually interfering with the updating process and it might result in a failed attempt, which is something that nobody wants to happen.
  • You can install this update using the Stock Recovery or even a Custom Recovery. However, note that after the update you will notice that the Root will be revoked along with the Custom Recovery image. That’s why you can download after that the ROM Manager or GooManager and flash again a custom Recovery such as CWM or TWRP. Both guides are listed below.
  • Read the entire post and you should be able to flash the firmware update easily without the need of extra instructions.
  • Make sure to apply all the steps that I have listed in the tutorial, as otherwise you won’t be able to install the update.
  • NOTE: We cannot be blamed in case something goes wrong and you lose data or you brick the tablet. You’re using this manual Android 4.2.2 JB updating guide at your own risk and no one can be blamed when something goes wrong.
  • If you think that this guide is hard to complete, then you can choose to wait until Google pushes the update to your tablet.

These were all the instructions that you had to go over before going to the tutorial. Make sure to ask for more help in comments in case you cannot complete the firmware update.

How to update Google Nexus 7 to official Android 4.2.2 JDQ39 Firmware:

  1. Download the JDQ39 firmware update zip from HERE. Save the file on your PC.
  2. Connect your computer to your PC and then move the zip on its internal SDcard. When the file is copied you should disconnect the device from PC.
  3. Power off the tablet.
  4. Boot it now into Fastboot mode. It can be done if you press simultaneously Volume Up and Power. When the Fastboot menu appears you should see a START icon.
  5. Select Recovery option and then you will need to press and hold Power and Volume Up. It will enter the RECOVERY mode.
  6. When the Recovery menu is listed you will have to select ‘install’ or ‘install zip from sdcard’. It depends on the time of Custom Recovery that you’re using.
  7. Find the JDQ39 Android 4.2.2 zip and confirm that you want to install it.
  8. When the installation is complete you should return to the main Recovery menu.
  9. Wait for the first boot process to complete.
  10. That’s it, you’ve managed to update your device’s firmware and you can start testing the Android 4.2.2 ROM now.

These were all the instructions that you had to go over. In case you’re having problems installing the update, then you should ask for more help in comments.

If your device is running a Stock Recovery, then you will be forced to install it using the ADB sideload commands. Here’s how to:

  • download the JDQ39 ROM on your PC.
  • Place it in Android SDK/ platform-tools folder.
  • Then, power off the tablet and then boot it into Fastboot mode.
  • Select ‘recovery’ and then press and hold ‘Volume Up and Power. Next, select ‘apply update from adb’.
  • Open a Command Prompt in Window and then enter: adb sideload <filename> NOTE: The <filename> has to be entered exactly with the name of the JDQ39 zip and enter the files extension also.
  • Wait until the device is updated.
  • Reboot.
  • That’s it you’ve successfully installed the Android 4.2.2 Update on your Nexus 7.

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