Google has started rolling out this month'ssecurity updatesto its Pixel and Nexus devices. March security update fixes over 24 security vulnerabilities. Don't want to wait for the OTA notifications? Follow this guide to install Android 7.1.1 NOF27B factory image and root Pixel XL.

Prerequisites to flash and root Pixel XL onNOF27B Android 7.1.1

Create a backupof all important data on your Pixel XL.Download and installUSB driversfor Pixel onyour computer.Thebootloadershould be unlocked.Enable USB debugging option by pressingMenu>Settings>Applications. Navigate and tap onDeveloper Optionsto enableUSB Debugging.Ensure that your Pixel XL carries more than 70% of charge.

Howto flash and root Pixel XL onNOF27B Android 7.1.1

Required files:Download NOF27B Android 7.1.1 factory image for your Google Pixel XL fromhere. Note, you will have to download the factory images, NOT the OTA files.

Connect your Pixel XL to your PC using a USB cable and turn it off.Now, start the device inFastbootmode:Turn onthe phone while pressing and holding theVolume Up+Volume Down+Powerkeysuntil you see the Fastboot menu and the START text on top.Extract the downloaded Nougat file anywhere onyour PC. Go to_NOF27B_folder and copy/paste all the files to your Fastboot directory (which often is the platform-tools folder inside the Android SDK directory).Now, we will flash the factory image on your Pixel phone. Open the folder containing the factory image downloaded and extracted. In the address bar, typecmdand type the command written below and press enter.Windows: Runflash-all.batMac:Runflash-all.shusingTerminalLinux:Runflash-all.sh

Once the script finishes running, your Pixel XL will reboot. First boot may take up to 5 minutes, so don't be worried if it takes your device longer than usual to boot up. Once it's back up, your Pixel XL will be running the latestversion of Android 7.1.1 Nougat.

Root Pixel XL onNOF27B Android 7.1.1 Nougat official firmware

Required files:

DownloadAndroid SDKand install it. Set it up withplatform-tools and USBdriverspackage inSDK.DownloadSuperSU v2.78 SR5 for your Pixel device on your PC.Download TWRP recovery toolfrom hereand store theZIP filein the root directory of your phone.Also, downloadFastboot from the following links, depending on your OS andextract it inandroid-sdk-windows\platform-toolsdirectory. Create thedirectory if not already there.Windows:DownloadMac:DownloadLinux:Download

Step 1:Connect your Pixel XL toyour computer via USB.

Step 2:Copy and pasteSuperSuzip file to your device storage's root folder.

Step 3Download TWRP img file from here and save it in the same directory you had extracted Fastboot/ADB files.

Step 4:Turn your Pixel XL off.

Step 5:Enter Bootloader mode: press and holdVolume Down+ Up+Powerkeys.

Step 6:Gotoandroid-sdk-windows\platform-toolsdirectoryand open Command Prompt (Shift+Right-click>Open Command Prompt) and type the following command:

fastboot boot twrp-3.0.2-0-RC1-fastboot-marlin.img - replace twrp-3.0.2-0 if you are using newer versions.

Step 7:Once done, your Pixel XL will enter inTWRPRecovery.

Step 8: SelectInstalland choose the TWRP installer zip file. Then,Swipe to Confirm Flashat the bottom of the screen to start the installation process. This step will ensureyour TWRP doesn’t get reset to stock on reboot.

Step 9: Reboot yourGoogle Pixel into recovery mode.

Step 10:In the recovery mode, tap onInstalland select the SuperSU zip file downloaded earlier. Swipe to confirm flashing.

Step 11: Once SuperSU is flashed, you’ll getReboot Systemoption to reboot your device.

Your Pixel XL is now updated and rooted on the latest and official Android 7.1.1 NOF27B. You can verify the root with any Root Checker app.