Google just started to roll out final preview of Android 8.1 Oreo Beta update (build OPP6.171019.012) for early adopters. If you own a Nexus or Pixel device you can download and install the update right now. If you are already enrolled for Android Beta program you will get the OTA update, which weighs around 130MB. The stable build of Android 8.1 Oreo is expected release in December.
Android 8.1 Oreo Developer preview includes optimizations for Android Go, Neural Networks API (accelerate on-device machine intelligence), Pixel Visual Core (Google’s first custom-designed co-processor for image processing), November 2017 security patches along with stability and performance improvements.
Final preview of Android 8.1 Oreo is available for Nexus 5X, Nexus 6P, Pixel, Pixel XL, Pixel 2, Pixel XL 2 and Pixel C. Android 8.1 DP2 preview image is also now available for all eligible devices, which you can download and install manually via ADB. However, the manual installation will factory reset your device.
Before start installing the new update, note that this is a testing version of Android 8.1, so it cannot be used as a daily driver. It may include various bugs and performance issues. It is recommended that inexperienced users wait for the stable build of Android 8.1, which is expected release by December.
How to Install Android 8.1 DP2
If you are enrolled for Android O beta program, you will get the Android 8.1 OTA update, which weighs around 130MB.
1. If you prefer manual installation, download factory images from here (build OPP6.171019.012) and flash manually.
2. Interested users, check this guide for manual installation instruction.
(source – Google)