https://wccftech.com/oneplus-makes-fun-pixel-4-90hz-refresh-rate-low-brightness/

One of the standout features of the Google Pixel 4 is its 90Hz screen. However, the search giant has admitted that depending on the situation, the screen might automatically be reset to 60Hz. OnePlus also incorporates a 90Hz refresh rate display on its devices and the Chinese OEM decided to poke fun at Google in the form of a tweet, which it later deleted.

Google says that the display on the Pixel 4 is adjusted to 60Hz when high refresh rates are not deemed critical. For instance, when the battery saver mode is enabled and the screen brightness is low, the refresh rate is dropped from 90Hz to 60Hz. To have a little fun at the expense of Google, OnePlus sent out a tweet in which it said that no matter what the brightness level is, the refresh rate remains at 90Hz on its phones that support the technology.