OxygenOS Open Beta 8 also brings improvement to camera, launcher, and calling UI. Most of the changes of this update are already available on OnePlus 6T, so OnePlus 6 owners on stable channel can expect them soon on their device via OxygenOS 9.0.3 update.
Official changelog of the update: The OxygenOS Open Beta 8 OTA (weighs 100 MB) is now rolling out and it will take few hours or even few days to reach on all phones running on the Open Beta channel. In case you want to get the update early, use a VPN app, set the location to Canada or Germany and search for the new updates. Manual Installation Instruction: If you prefer manual installation, you can download the OxygenOS Open Beta 8 full firmware [HERE] to your phone. After downloading the file, power down the phone, then boot it into recovery by using Volume Down and Power button combination. Choose “Install from internal storage”, find your .zip file and flash it. Your device will reboot automatically after installing the OS. [source]
