How to Install the December Android 8.1 Update
After you've prepared yourself and your Nexus 5X for this version of Android 8.1, it's time to install the update on your phone.
The newest version of Android 8.1 Oreo is currently available to sideload on your Nexus 5X. Google's posted the OTA files and those of you who know how to flash can simply grab those and make the transition to the new build today.
If you don't know how to sideload or simply don't want to, you'll have to wait for the OTA to arrive for your device.
It typically takes a few days for Android software to reach every single Nexus 5X around the globe so you'll need to be patient.
For more on the manual installation process, check out our guide.