https://www.theverge.com/2018/5/8/17330164/android-p-beta-program-download-how-to-install

Google just wrapped up a huge preview of the new features coming to Android P. It’s an ambitious update that includes significant changes to the operating system almost everywhere you look. The official release of Android P won’t happen until late summer, but you don’t have to wait that long to try out P’s new gestures, see the new look, and go over the depressing data showing how much time you’re spending on your phone. Beginning today, you can install the first public beta on a few supported smartphones.

Typically, these betas have been limited to Google’s own smartphones, but with Android P, you can load the update onto a few devices from other companies as well. This is the widest mix of products that have had day-one access to a beta of a new version of Android, and we’ve got Project Treble to thank for that. Here’s the list of what’s supported: