Android P Beta 4, the final pre-launch version, is currently being deployed to eligible developers. Beta 4 is the final release candidate, which means that it should be very similar to the final software that the general public gets on their devices. More importantly, Google's publication of the definitive release candidate means that we have access to the Android P virtues for everyone.
"Today's Beta 4 update includes a final system behavior release candidate build and the official Android P APIs (API Level 28), available since Beta 2," said Dave Burke, vice president of engineering for Android. "It contains everything you need to complete your tests in time for the upcoming official Android P release."
If you are not already running the Android P-Beta on your compatible Pixel device, Burke also provides the date instructions for enrolling:
It's easy ̵1; you can get Android P Beta 4 on Pixel devices by clicking sign up here. If you are already signed in to our Android Beta program, you will soon receive the Beta 4 update automatically. As always, downloadable system images are available for pixel devices. Partners participating in the Android P beta program will also be upgrading their devices to Beta 4 in the coming weeks.
As always, be careful when upgrading your daily driver to experimental beta software. Sure, this is the final release candidate, which means it's probably stable, but it's still not shipping software. Bugs and glitches can challenge daily use, and you should make sure that you have a full backup in the event of a disaster, or just when you want to downgrade.
If you do not have a Pixel device, I have to wait for partner companies to make an Android P Beta 4 image available to their device. Phones including the Sony Xperia XZ2, the Oppo R15 Pro, the Vivo X21, the OnePlus 6 and the Lost Essential PH-1 have all received previous Android P beta builds.