OnePlus 5 runs OxygenOS Open Beta 1 will get the Beta 2 update via OTA. Others need to download the full firmware and flash it manually as described below. OxygenOS Open Beta 2 update is now available for download, which you can use to install manually on your device. Below is what is new in this update.

OxygenOS Open Beta 2 changelog: Although the firmware status is Beta, it is almost stable and reliable, so users can use it as daily driver. However, install it at your own risk. Download: OxygenOS Open Beta 2 (full) for OnePlus 5

How to Install Android 8.0 Oreo Based OxygenOS Open Beta 2 on OnePlus 5

  1. Download OnePlus 5 Open Beta 2 full firmware package from above link.
  2. After downloading the firmware on your computer, follow this installation instruction. How to downgrade to Nougat: If you want to go back to previous build, you should download the downgrade build and flash it via stock recovery. Here is how it is. (Source – OnePlus)