Official Android 5.1.1 for Nexus 9 Released – Here’s How to Update and Root Nexus 9


Google has just released the official LMY47X Android 5.1.1 for Nexus 9 which is quite a late update when compared to several other Nexus devices. For now the OTA update will only reach your device if you own the Wi-Fi version of the Nexus 9. LTE Nexus 9 is expected to soon get the Android 5.1.1 Lollipop update.

The Nexus 9 is reportedly getting this update worldwide, however, if you don't plan to wait for over-the-air update, here is the manual way of doing so. Follow this guide to flash Android 5.1.1 for Nexus 9 and root the device on LMY47X.

Relevant: CM12.1 Nightly Android 5.1.1 for Nexus 6, Nexus 7, and Nexus 10

We will be updating this guide with links for LTE Nexus 9 when Google releases the update.

Prereqs to flash and root Android 5.1.1 for Nexus 9:

  • Download Android SDK and install USB drivers.
  • Enable USB debugging by pressing Menu > Settings > Applications. Navigate and tap on Developer Options to ensure that USB Debugging is enabled.
  • Your Nexus's bootloader should be unlocked.
  • Ensure that your Nexus 9 carries more than 70% of charge.

Note: Nexus 9 can be on any official or custom ROM for this installation update; just ensure that you are using this guide for HTC Nexus 9 and no other device.

How to flash official LMY47X Android 5.1.1 for Nexus 9:

Required files: 

Here are the steps to flash official Android 5.1.1 on Nexus 9!

  • Connect your Nexus 9 with your computer using a USB cable.
  • Power off and reboot your Nexus 9 in Bootloader / Fastboot mode by pressing and holding Volume Up and Power buttons. Use the Volume key to highlight Recovery Mode and use Power key to select it.
  • Extract the downloaded factory image on your computer.
  • Go to volantis-LMY47X folder, copy and paste all the files in to Fastboot directory.
  • In the Fastboot directory, from the factory image files perform the following command depending on your OS:
    • On Windows: Run flash-all.bat
    • On Mac: Run using Terminal
    • On Linux: Run
  • This will start the update process. When done successfully, your Nexus 9 will reboot; first boot takes a good five minutes so be patient.

Ta da! Have fun with the Android 5.1.1 for Nexus 9 official update.

Root Nexus 9 LMY47X Android 5.1.1:

Now, if you want to root Nexus 9 on Android 5.1.1 LMY47X, here are the simple steps.

  1. Keep your Nexus connected to the computer.
  2. Extract the earlier downloaded CF Auto zip folder on your computer.
  3. Enable Developer Options on Nexus 9: in the About Device > tap Build Number multiple times until you see the new tab Developer Options. In here, check Enable OEM Unlock and USB Debugging.
  4. Enter the Bootloader mode from your computer by running this command (open command prompt with Shift Right Click Open the command window here),
    1. adb reboot bootloader
  5. Execute the root file,
    1. Windows: run root-windows-bat
    2. OS X: chmod +x
    3. Linux: chmod +x
  6. Once the command window finishes executing, your Nexus 9 will reboot.

Have fun with the rooted Nexus 9 on Android 5.1.1 Lollipop LMY47X.