Do With Your Own Risk!!
Complete Step-By-Step Instructions:
Step 1 – Download Android 6.0.1 Factory Image (bullhead-mtc19v-factory-f3a6bee5.tgz) for Nexus 5X on your PC, if you haven’t already.
Step 2 – Connect your Nexus 5X to your computer using the USB cable.
Step 3 – Please make sure Fastboot is configured and properly installed on your computer. How? See here: How to Set Up ADB and Fastboot with Android SDK.
Step 4 – Turn OFF your phone.
Step 5 – Get into the Fastboot/Bootloader Mode on your phone. Turn ON the phone while pressing and holding the Volume Up + Volume Down + Power buttons till you see the Fastboot menu and START on top.
Step 6 – Now extract the downloaded file anywhere in your computer. Go to the folder bullhead-mtc19v and then copy/paste all the files to your Fastboot directory.
Note: If you followed our tutorial on setting up Fastboot on your computer, there is a 99% chance your Fastboot directory will be the platform-tools folder in your Android SDK directory.
Step 7 – From the factory image files in your Fastboot directory, do the following depending which OS you are on:
- On Windows: Run the file “flash-all.bat”.
- On Mac: Run the file “flash-all.sh” using Terminal.
- On Linux: Run the file “flash-all.sh”.
Step 8 – That’s pretty much that you had to do for flashing the stock factory image on your Nexus 5X. Now wait and watch as the process is completed — or follow the on-screen instructions on your phone if in case you have to unlock the bootloader.
Step 9 – After the installation completes, the phone will boot now and it might take about 5 minutes to boot on your first time. So, please wait with patience!
That’s it! Your Nexus 5X should now have the official Android 6.0.1 MTC19V Marshmallow software update installed on your phone using the stock factory image from Google! Go to Settings >About phone to verify.