Google has released Android 7.1.1 Nougat Developer Preview for a limited number of devices that includes the Nexus 5X, Nexus 6P, and Pixel C tablet. According to Google the Developer Preview will be available for other devices beginning in November.
If you are already signed up for the Android Developer Program then there isn’t anything else you need to do. The Developer Preview will become available to you, as long as you have the supported device(s) soon, as updates are provided as OTA releases. If you are not signed up, manually flashing the Android 7.1.1 Developer Preview is also an option (link provided below).
Android 7.1.1 brings a few welcomes changes such as app shortcuts by long press on an app icon and quick shortcuts will pop up, the new software also includes round icons, and a more advanced keyboard. To sign up for Android 7.1.1 Developer Preview hit the source link below. Let us know what you think in the comment section below.
Source: Android Developers Blog, Android Beta Program, Flashing a device manually