Google has released the Android 6.0 OTA Update for all the Nexus 9 LTE devices. If you want to run this new firmware on your tablet and you don’t want to wait until the Android 6.0 upgrade is released over-the-air, then you can use this manual installation guide below.

android marshmallow 6.0 update
Flash Android 6.0 Marshmallow for Nexus 9 LTE using ADB Sideload

Flash Android 6.0 Marshmallow for Nexus 9 LTE using ADB Sideload

Android 6.0 comes with tons of improvements and you can read more about this release here and here. Before installing the new firmware upgrade you should read the guidelines below and make sure that your device meets all requirements:

  • use this tutorial only with the Google Nexus 9 LTE models.
    – do not try to update any other different Nexus 9 models.
  • your tablet should run the Android 5.1.1 LMY48T firmware for the manual updating process to work.
    – make sure that the LMY48T Lollipop firmware is installed on your device.
  • check the model of your device and the Android version it runs under Settings> About Device menu.
  • in case your tablet sports a custom ROM right now, then this update process is not going to work.
    – any modification applied to your tablet will prevent the official Android 6.0 update from being flashed.
    – continue with the rest of the installation instructions only if your tablet sports 100% stock Android 5.1.1.
  • make sure to enable USB Debugging option from the Developer Options menu.
    – if you can’t find the Developer Options menu, then you will have to unhide it.
    – go to Settings> About Device and tap 7 times on the Build Number section.
    – return to Settings, scroll down and you will the Developer Options menu.
    – open it, find USB Debugging and enable it, too.
  • check the battery charge level and make sure that it is over 50%, it will prevent the device from powering off during installation.
  • read the whole guide and do not skip any steps.
  • this is a tutorial that has to be used by advanced users only, we cannot be held responsible in case you brick your tablet nor in case you lose any important data in the process.
  • make sure to backup all the important files before starting the update.

If you are a beginner and you don’t know your way around “ADB sideloading”, then it would be best for you to wait until Google pushes the Android 6.0 Marshmallow update over-the-air in your region.

Since you’ve gone past all of the above you can now continue to the next part of this post.

How to ADB sideload Android 6.0 Marshmallow MRA58K Update for Google Nexus 9 LTE:

First you should make sure that Android SDK is installed on your PC. Here’s how to do it:

  • download the Android SDK bundle from here.
  • install it on your PC.
  • locate the SDK Manager exe, launch it.
  • download all the SDK packages and USB drivers, then make sure to install them all.
  • in the SDK folder you should have the platform-tools folder.
    – find this particular folder and leave it open, as that’s where you will have to place the Android 6.0 update file.
  • if the tablet is not detected, then you should try to install the these Google USB drivers too.

Start the update:

  1. Download the Android 6.0 MRA58K Marshmallow Update from here.
  2. After the download is complete you should rename it to update.zip
    -this way should be easier for you to flash it using the command prompt screen.
  3. Place the update.zip file in the platform-tools folder.
    – the folder is located under the SDK directory you’ve configured above.
  4. Power off the Nexus 9 tablet.
  5. Now boot it in Recovery Mode.
  6. Use the usb cable to connect your tablet to your computer.
  7. Launch the Windows CMD in the platform-tools folder.
    – it can be done easily by opening the folder, holding SHIFT key and then right-clicking on the folder’s empty space to select ‘open command prompt window here’.
  8. Enter the following command in order to verify that your tablet has been detected:
    adb devices
    – if the tablet is not recognized you should try to re-install the usb drivers.
    – if the device is detected you should see a long string of numbers and letters, that means that you can continue to the next step.
  9. Enter ADB sideload update.zip in order to initiate the Android 6.0 Marshmallow installation.
    – don’t press any buttons until all the files are flashed successfully.
  10. When the update is done you can reboot the tablet in normal mode.
  11. Use the default Google account data in order to regain complete control over your tablet once again.

source: android.gs

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