To force 120 Hz mode use this adb command
Code:
adb shell settings put secure refresh_rate_mode 2
Peter 22 November 2021
Samsung Android
The
Samsung Galaxy S21,
S21+ and
S21 Ultra units in the US received the stable version of One UI 4 last week, even the carrier phones. However, one bug managed to sneak through the beta tests and is currently affecting users.
The issue is with the 120 Hz mode, specifically that the screen drops down to 60 Hz as soon as the user lifts their finger rather than, say, when the scrolling animation is done.
Samsung is aware of the issue and is working on a fix. It seems that this issue was actually caught in the beta tests, but the fix that is present in the current version of the software (BUK7) only works on some units. A more complete fix should arrive with the next update.
Initial reports indicated that this issue affected only US users, but Galaxy S21 owners from other regions have also complained of the same problem.
The bug prevents the phones from using their 120Hz screens to their full potential. Samsung is aware of the issue.
www.gsmarena.com