OnePlus 6T has no support for the 3.5mm headphone jack. With the this the Audio Tuner option in the Oxygen OS no longer work with the Bluetooth earphones. So that means, even if you have new Bullets Type-C headphones, it has no equalizer on your new phone. Now, the new update brings the equalizer support to the handset.
Now, the version 9.0.7 of Oxygen OS improves the overall stability of the Bluetooth connection too. Also, the power consumption and the Wi-Fi stability gets minor improvements.
The update states that the Camera performance while shooting slow-motion videos now gets better. Also, there are some other bug fixes along with a fix that resolves the display issues with the wallpaper on the lock screen.
The update is now rolling out in phases, and it will take some time to reach other users in the market.