UNLOCK BOOTLOADER before proceeding to avoid Failed OTA Updates.
Android N Developer Preview OTA Update Page: https://google.com/android/beta OR g.co/androidbeta
List of Compatible Devices, on which Android N Developer Preview can be installed: Nexus 6P, Nexus 5x, Nexus 6, Nexus 9, Nexus 9G, Nexus Player, Pixel C & General Mobile 4G
Failed OTA Update, Go to: http://www.androidcentral.com/android-n-developer-preview-can-wreck-your-nexus-think-you-act
How to Install Android N Developer Preview OTA: Installing the Android N Developer Preview on one of the compatible devices, OTA is a much easier way than flashing it manually.
For the OTA Installation, simply go to https://google.com/android/beta or g.co/androidbeta using Google Chrome. You will be required to Log In to your account. The Android N Developer Preview webpage has all the information about the Android Beta Program. Scroll down to the list of devices, compatible for the OTA update. Click on “Enroll Device” besides…