From skaforey over at XDA:
https://developer.android.com/preview/download.html
You'll need an unlocked bootloader to flash the images.
You can also sign up for the ota program without an unlocked bootloader being required:
https://accounts.google.com/Service...ih3-Wo53nFBR4VFZ5CIvnwXDRCbCaAC9z0NUgxzwGWkNA
https://developer.android.com/preview/download.html
You'll need an unlocked bootloader to flash the images.
You can also sign up for the ota program without an unlocked bootloader being required:
https://accounts.google.com/Service...ih3-Wo53nFBR4VFZ5CIvnwXDRCbCaAC9z0NUgxzwGWkNA