First it was "coming soon", then it was due "in several weeks", and now it's finally here. We're talking about the first beta build of Android 8.0 Oreo for the Essential Phone. This has been quite some time in the making, with the company mentioning it back in September even. The wait is over. If you head over to this page on Essential's website and enter your email, you'll be able to download a full OTA zip file for the beta Oreo update. You'll then need to sideload it onto your handset, a process which is explained, in a step by step fashion, on the download page. Although what you need...
Source: https://www.gsmarena.com/android_80_oreo_beta_update_now_available_for_essential_phone-news-28268.php
