Along with FPS option, the OxygenOS Open beta 21 and 13 for OnePlus 6 and 6T includes Screen Recorder, latest security patches (June 2019), general bug fixes and stability improvements. Both devices recently received latest features of OxygenOS like Fnatic mode, Digital Wellbeing and Zen Mode.

What’s new in OxygenOS Open beta 21 and 13? System

General bug fixes and stability improvements Screen Recorder Added FPS (Frames per second) option giving you more control over recording effects

Weather

Improved scrolling experience for switching between pages Weather cards for multiple cities can now be rearranged or deleted by tapping and holding on them Optimized user experience by allowing you to use this app while app permission to access GPS location is disabled

Phone

Improved animation effects when switching between pages Improved experience with searching for contacts Optimized Quick Responses for declined calls and supported editing Quick Responses

Download OxygenOS Open Beta for OnePlus 6/6T

OxygenOS Open Beta 21/13 incremental OTA update is rolling out now and it may take a couple of days to complete. If the device is running on previous open beta build, then check for the new update by going to System update menu. You can also use any VPN app to get the update early. Set the location to Germany or Canada, and then check for the update by going to the System update menu. To install the update manually (Local upgrade), download the full ROM from the link below and then follow the instruction given.

Download

OxygenOS Open Beta 21 for OnePlus 6 (MD5: facc578ecc09a50f6eb33c666d9c47be) OxygenOS Open Beta 13 for OnePlus 6T (MD5: 3f09eb2019c9695c312f0490b96a7e51)

Installation Instruction

Installing OxygenOS firmware update on OnePlus 6/6T is a very simple process. After downloading the file, all you need to boot your phone into recovery mode to flash the firmware update via Local Upgrade. Follow this detailed installation instruction. [Source – OnePlus]