Upgraded Android Security Patch to 2021.06 File Manager Camera Improved the stability Optimized the dial-pad UI display effect While this may shine a ray of hope in the hearts of users, it seems the update still hasn’t fixed all the existing issues. Multiple users on Reddit reports that the update improves UI lag and makes the performance slightly more consistent. The battery performance of the phones is also reportedly better after the update. However, the issue of not being able to stream HD videos remains unresolved for some users. With the Oxygen OS 11 update, the OnePlus 7 and 7T devices lost the ability to stream HD quality videos on streaming services like Netflix and Amazon Prime Video. That’s because the update inexplicably demoted the phones from Widevine DRM L1, needed for HD streaming, to Widevine L3 that only enables SD streaming.