OnePlus is using their own naming convention to address these Beta releases, which makes things a bit confusing. While they refer to this release as the “Android P Developer Preview 3,” it is based on the same codebase as the Pixel’s Android P Developer Preview 4 (Beta 3), but with some OxygenOS flavoring on top of it (that were added in the previous Beta).
OnePlus 6 Android P Beta 3 Changelog
Updated Android security patch to 2018.7
Updated Google Mobile Services
Improved system stability
Fixed issue with hotspot functionality
Improved image quality
Fixed issue with watermark option functionality
Improved camera functionality with third-party apps
Fixed compatibility issues with certain third-party apps
Other known Issues:
System stability and power consumption issues
Compatibility issues with Bluetooth connectivity
Some apps may not function as expected when running on this Developer preview release
This release hovers primarily around improving system stability and compatibility issues, as well bringing the latest July 2018 security patch to the device. Since this is still a developer preview, stability issues and power consumption issues still exist.
Updating from OxygenOS based on Android Oreo to these Android P Developer Previews involves a data wipe. If you are updating from a previous Android P Developer Preview, a data wipe is not necessary, but you should still ensure your data is backed up in case you need to wipe it for unforeseen compatibility issues. For detailed instructions on both upgrading and downgrading, and for download links, check out OnePlus’s official thread for this update.