Google has just released the officialLMY47X Android 5.1.1 for Nexus 9which 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 forNexus 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 pressingMenu>Settings>Applications. Navigateand tap onDeveloper Optionsto ensure thatUSB Debuggingis enabled.Your Nexus's bootloader should be unlocked.Ensure that your Nexus 9carries 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 LMY47XAndroid 5.1.1 for Nexus 9:

Required files:

DownloadAndroid 5.1.1 factory image for Nexus 9DownloadCF SuperSU Root Tool

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

Connect your Nexus 9with your computer using a USB cable.Power off and reboot your Nexus 9 in Bootloader / Fastbootmode by pressing and holdingVolume UpandPowerbuttons. Use theVolumekey to highlightRecovery Modeand usePowerkey to select it.Extract the downloaded factory image on your computer.Go tovolantis-LMY47Xfolder, 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:OnWindows:Runflash-all.batOnMac:Run flash-all.shusing TerminalOnLinux:Run flash-all.shThis 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 theAndroid 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.

Keep your Nexus connected to the computer.Extract the earlier downloaded CF Autozip folder on your computer.EnableDeveloper Optionson Nexus 9: in theAbout Device> tapBuild Numbermultiple times until you see the new tabDeveloper Options. In here, checkEnable OEM UnlockandUSB Debugging.Enter theBootloadermode from your computer by running this command (open command prompt with Shift+Right Click>Open the command window here),adb reboot bootloaderExecute the root file,Windows:run root-windows-batOS X: chmod +x root-mac.sh

runroot-mac.shLinux:chmod +x root-linux.sh

runroot-linux.shOnce the command window finishes executing, your Nexus 9 will reboot.

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