The latest Android N Preview 3 build is live for the LTE version of the Google Nexus 9. Check the guidelines in this post in order to learn how to successfully flash this new ROM.

Android N is the next OS iteration launched by Google and it should hit its final form some time this summer. Before the official roll out of the full version is here you can test the Android N Developer Preview 3 build, which should be the final beta release.

Installing a 'factory image' file means that you will flash a complete copy of an OS and that you will lose all the data stored on your tablet's storage, as no file is going to survive the updating process.

Check these guidelines in order to learn how to install the Android N Preview 3 on your device:

  • use this tutorial only with the Google Nexus 9 3G LTE.
  • do not try to flash the factory image on any other different devices.
  • enable the USB Debugging option from the Developer Options menu of your phone.
    - Developer Options can be enabled from the Settings> About Device section by tapping 7 times on the Build Number section.
    - return to Settings, scroll down and there you should find the Developer Options.
    - open Developer Options, find USB Debugging and check it.
  • if your device is rooted, then root access won't survive the updating process.
  • note that no data files are going to survive the installation of this new ROM.
    - make sure to backup all the important data files before starting the installation process.
  • you should flash the new factory image only if you are an advanced user.
    - we cannot be blamed in case you brick the tablet nor in case you lose any important data in the process.
  • read the entire post and do not skip any steps.
  • check your phone's battery charge level and make sure that it is over 5o%, as it will prevent your device from powering off during the first boot process of Android N Preview 3 OS.

Now that you know all of the above you can get to the next part of this post.

How to flash Android N Preview 3 Factory Image for Google Nexus 9 LTE:

You have to setup the Android SDK on your computer. The Android SDK is going to allow you to connect your tablet with your PC.

Here's how to install and setup Android SDK:

  • download the Android SDK from here.
  • install it on your PC.
  • get to SDK installation folder and launch SDK Manager exe.
  • use the SDK Manager to download and install all the SDK packages and usb drivers.
  • next, find the platform-tools folder and leave it open.
    - that's the folder where you need to copy the installation files of Android N Preview 3.
  • if you cannot connect your device to your PC, then you should try to update the installed Google usb drivers with the ones found here.
    - those usb drivers are designed for Nexus 5, but they should work for the Nexus 9 tablets, too.

Install Android N Preview 3 Factory Image for Google Nexus 9 LTE:

  1. Download the Android N Preview 3 factory image archive from here.
  2. After the download is complete you need to extract the archived contents.
    - save the files on your PC.
  3. Move the extracted files and save them to platform-tools folder.
    - this is the folder obtained while setting up the Android SDK.
  4. Power off the Nexus 9.
  5. Boot it in Fastboot Mode.
    - don't select boot options, just leave the Fastboot Mode opened on your device.
  6. Connect your Nexus 9 to PC via usb cable.
    - verify that the device has been detected.
  7. Now, go to platform-tools folder.
  8. Begin Android N Preview 3 installation process by launching the flash-all.bat script.
    - confirm the flashing process and don't press anything during the installation process.
  9. After the flashing process is done you can see a confirmation alert shown by the Installer script.
  10. Reboot your tablet in normal mode and you should be done with this process.

These were all the steps that you had to take in order to complete the Android N Preview 3 installation.

Unplug the tablet from computer when the Android boot screen loads on your device. Use your default Google account in order to regain complete control over your device.

If you need more help you should tell us in comments.

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