Android 7.1.2 began to roll out to those of you enrolled in the Beta program yesterday. This is great if you are already on stock and aren't running some sort of custom rom. If you are running custom firmware you would need to manually install the Android 7.1.2 Beta image, and now you can. The image files are now available for download. The Builds are currently available for the Pixel C, Nexus Player, Pixel, and Pixel XL. The 5X and the Nexus 6P will receive their builds later. Head to the link below to grab the stock image for your phone.
via Google